+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright (C) 2014 David Herrmann <dh.herrmann@gmail.com>
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <fcntl.h>
-#include <inttypes.h>
-#include <libudev.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <systemd/sd-bus.h>
-#include <systemd/sd-event.h>
-#include <unistd.h>
-
-/* Yuck! DRM headers need system headers included first.. but we have to
- * include it before shared/missing.h to avoid redefining ioctl bits */
-#include <drm.h>
-#include <drm_fourcc.h>
-#include <drm_mode.h>
-
-#include "bus-util.h"
-#include "hashmap.h"
-#include "grdev.h"
-#include "grdev-internal.h"
-#include "macro.h"
-#include "util.h"
-
-#define GRDRM_MAX_TRIES (16)
-
-typedef struct grdrm_object grdrm_object;
-typedef struct grdrm_plane grdrm_plane;
-typedef struct grdrm_connector grdrm_connector;
-typedef struct grdrm_encoder grdrm_encoder;
-typedef struct grdrm_crtc grdrm_crtc;
-
-typedef struct grdrm_fb grdrm_fb;
-typedef struct grdrm_pipe grdrm_pipe;
-typedef struct grdrm_card grdrm_card;
-typedef struct unmanaged_card unmanaged_card;
-typedef struct managed_card managed_card;
-
-/*
- * Objects
- */
-
-enum {
- GRDRM_TYPE_CRTC,
- GRDRM_TYPE_ENCODER,
- GRDRM_TYPE_CONNECTOR,
- GRDRM_TYPE_PLANE,
- GRDRM_TYPE_CNT
-};
-
-struct grdrm_object {
- grdrm_card *card;
- uint32_t id;
- uint32_t index;
- unsigned int type;
- void (*free_fn) (grdrm_object *object);
-
- bool present : 1;
- bool assigned : 1;
-};
-
-struct grdrm_plane {
- grdrm_object object;
-
- struct {
- uint32_t used_crtc;
- uint32_t used_fb;
- uint32_t gamma_size;
-
- uint32_t n_crtcs;
- uint32_t max_crtcs;
- uint32_t *crtcs;
- uint32_t n_formats;
- uint32_t max_formats;
- uint32_t *formats;
- } kern;
-};
-
-struct grdrm_connector {
- grdrm_object object;
-
- struct {
- uint32_t type;
- uint32_t type_id;
- uint32_t used_encoder;
- uint32_t connection;
- uint32_t mm_width;
- uint32_t mm_height;
- uint32_t subpixel;
-
- uint32_t n_encoders;
- uint32_t max_encoders;
- uint32_t *encoders;
- uint32_t n_modes;
- uint32_t max_modes;
- struct drm_mode_modeinfo *modes;
- uint32_t n_props;
- uint32_t max_props;
- uint32_t *prop_ids;
- uint64_t *prop_values;
- } kern;
-};
-
-struct grdrm_encoder {
- grdrm_object object;
-
- struct {
- uint32_t type;
- uint32_t used_crtc;
-
- uint32_t n_crtcs;
- uint32_t max_crtcs;
- uint32_t *crtcs;
- uint32_t n_clones;
- uint32_t max_clones;
- uint32_t *clones;
- } kern;
-};
-
-struct grdrm_crtc {
- grdrm_object object;
-
- struct {
- uint32_t used_fb;
- uint32_t fb_offset_x;
- uint32_t fb_offset_y;
- uint32_t gamma_size;
-
- uint32_t n_used_connectors;
- uint32_t max_used_connectors;
- uint32_t *used_connectors;
-
- bool mode_set;
- struct drm_mode_modeinfo mode;
- } kern;
-
- struct {
- bool set;
- uint32_t fb;
- uint32_t fb_x;
- uint32_t fb_y;
- uint32_t gamma;
-
- uint32_t n_connectors;
- uint32_t *connectors;
-
- bool mode_set;
- struct drm_mode_modeinfo mode;
- } old;
-
- struct {
- struct drm_mode_modeinfo mode;
- uint32_t n_connectors;
- uint32_t max_connectors;
- uint32_t *connectors;
- } set;
-
- grdrm_pipe *pipe;
-
- bool applied : 1;
-};
-
-#define GRDRM_OBJECT_INIT(_card, _id, _index, _type, _free_fn) ((grdrm_object){ \
- .card = (_card), \
- .id = (_id), \
- .index = (_index), \
- .type = (_type), \
- .free_fn = (_free_fn), \
- })
-
-grdrm_object *grdrm_find_object(grdrm_card *card, uint32_t id);
-int grdrm_object_add(grdrm_object *object);
-grdrm_object *grdrm_object_free(grdrm_object *object);
-
-DEFINE_TRIVIAL_CLEANUP_FUNC(grdrm_object*, grdrm_object_free);
-
-int grdrm_plane_new(grdrm_plane **out, grdrm_card *card, uint32_t id, uint32_t index);
-int grdrm_connector_new(grdrm_connector **out, grdrm_card *card, uint32_t id, uint32_t index);
-int grdrm_encoder_new(grdrm_encoder **out, grdrm_card *card, uint32_t id, uint32_t index);
-int grdrm_crtc_new(grdrm_crtc **out, grdrm_card *card, uint32_t id, uint32_t index);
-
-#define plane_from_object(_obj) container_of((_obj), grdrm_plane, object)
-#define connector_from_object(_obj) container_of((_obj), grdrm_connector, object)
-#define encoder_from_object(_obj) container_of((_obj), grdrm_encoder, object)
-#define crtc_from_object(_obj) container_of((_obj), grdrm_crtc, object)
-
-/*
- * Framebuffers
- */
-
-struct grdrm_fb {
- grdev_fb base;
- grdrm_card *card;
- uint32_t id;
- uint32_t handles[4];
- uint32_t offsets[4];
- uint32_t sizes[4];
- uint32_t flipid;
-};
-
-static int grdrm_fb_new(grdrm_fb **out, grdrm_card *card, const struct drm_mode_modeinfo *mode);
-grdrm_fb *grdrm_fb_free(grdrm_fb *fb);
-
-DEFINE_TRIVIAL_CLEANUP_FUNC(grdrm_fb*, grdrm_fb_free);
-
-#define fb_from_base(_fb) container_of((_fb), grdrm_fb, base)
-
-/*
- * Pipes
- */
-
-struct grdrm_pipe {
- grdev_pipe base;
- grdrm_crtc *crtc;
- uint32_t counter;
-};
-
-#define grdrm_pipe_from_base(_e) container_of((_e), grdrm_pipe, base)
-
-#define GRDRM_PIPE_NAME_MAX (GRDRM_CARD_NAME_MAX + 1 + DECIMAL_STR_MAX(uint32_t))
-
-static const grdev_pipe_vtable grdrm_pipe_vtable;
-
-static int grdrm_pipe_new(grdrm_pipe **out, grdrm_crtc *crtc, struct drm_mode_modeinfo *mode, size_t n_fbs);
-
-/*
- * Cards
- */
-
-struct grdrm_card {
- grdev_card base;
-
- int fd;
- sd_event_source *fd_src;
-
- uint32_t n_crtcs;
- uint32_t n_encoders;
- uint32_t n_connectors;
- uint32_t n_planes;
- uint32_t max_ids;
- Hashmap *object_map;
-
- bool async_hotplug : 1;
- bool hotplug : 1;
- bool running : 1;
- bool ready : 1;
- bool cap_dumb : 1;
- bool cap_monotonic : 1;
-};
-
-struct unmanaged_card {
- grdrm_card card;
- char *devnode;
-};
-
-struct managed_card {
- grdrm_card card;
- dev_t devnum;
-
- sd_bus_slot *slot_pause_device;
- sd_bus_slot *slot_resume_device;
- sd_bus_slot *slot_take_device;
-
- bool requested : 1; /* TakeDevice() was sent */
- bool acquired : 1; /* TakeDevice() was successful */
- bool master : 1; /* we are DRM-Master */
-};
-
-#define grdrm_card_from_base(_e) container_of((_e), grdrm_card, base)
-#define unmanaged_card_from_base(_e) \
- container_of(grdrm_card_from_base(_e), unmanaged_card, card)
-#define managed_card_from_base(_e) \
- container_of(grdrm_card_from_base(_e), managed_card, card)
-
-#define GRDRM_CARD_INIT(_vtable, _session) ((grdrm_card){ \
- .base = GRDEV_CARD_INIT((_vtable), (_session)), \
- .fd = -1, \
- .max_ids = 32, \
- })
-
-#define GRDRM_CARD_NAME_MAX (6 + DECIMAL_STR_MAX(unsigned) * 2)
-
-static const grdev_card_vtable unmanaged_card_vtable;
-static const grdev_card_vtable managed_card_vtable;
-
-static int grdrm_card_open(grdrm_card *card, int dev_fd);
-static void grdrm_card_close(grdrm_card *card);
-static bool grdrm_card_async(grdrm_card *card, int r);
-
-/*
- * The page-flip event of the kernel provides 64bit of arbitrary user-data. As
- * drivers tend to drop events on intermediate deep mode-sets or because we
- * might receive events during session activation, we try to avoid allocaing
- * dynamic data on those events. Instead, we safe the CRTC id plus a 32bit
- * counter in there. This way, we only get 32bit counters, not 64bit, but that
- * should be more than enough. On the bright side, we no longer care whether we
- * lose events. No memory leaks will occur.
- * Modern DRM drivers might be fixed to no longer leak events, but we want to
- * be safe. And associating dynamically allocated data with those events is
- * kinda ugly, anyway.
- */
-
-static uint64_t grdrm_encode_vblank_data(uint32_t id, uint32_t counter) {
- return id | ((uint64_t)counter << 32);
-}
-
-static void grdrm_decode_vblank_data(uint64_t data, uint32_t *out_id, uint32_t *out_counter) {
- if (out_id)
- *out_id = data & 0xffffffffU;
- if (out_counter)
- *out_counter = (data >> 32) & 0xffffffffU;
-}
-
-static bool grdrm_modes_compatible(const struct drm_mode_modeinfo *a, const struct drm_mode_modeinfo *b) {
- assert(a);
- assert(b);
-
- /* Test whether both modes are compatible according to our internal
- * assumptions on modes. This comparison is highly dependent on how
- * we treat modes in grdrm. If we export mode details, we need to
- * make this comparison much stricter. */
-
- if (a->hdisplay != b->hdisplay)
- return false;
- if (a->vdisplay != b->vdisplay)
- return false;
- if (a->vrefresh != b->vrefresh)
- return false;
-
- return true;
-}
-
-/*
- * Objects
- */
-
-grdrm_object *grdrm_find_object(grdrm_card *card, uint32_t id) {
- assert_return(card, NULL);
-
- return id > 0 ? hashmap_get(card->object_map, UINT32_TO_PTR(id)) : NULL;
-}
-
-int grdrm_object_add(grdrm_object *object) {
- int r;
-
- assert(object);
- assert(object->card);
- assert(object->id > 0);
- assert(IN_SET(object->type, GRDRM_TYPE_CRTC, GRDRM_TYPE_ENCODER, GRDRM_TYPE_CONNECTOR, GRDRM_TYPE_PLANE));
- assert(object->free_fn);
-
- if (object->index >= 32)
- log_debug("grdrm: %s: object index exceeds 32bit masks: type=%u, index=%" PRIu32,
- object->card->base.name, object->type, object->index);
-
- r = hashmap_put(object->card->object_map, UINT32_TO_PTR(object->id), object);
- if (r < 0)
- return r;
-
- return 0;
-}
-
-grdrm_object *grdrm_object_free(grdrm_object *object) {
- if (!object)
- return NULL;
-
- assert(object->card);
- assert(object->id > 0);
- assert(IN_SET(object->type, GRDRM_TYPE_CRTC, GRDRM_TYPE_ENCODER, GRDRM_TYPE_CONNECTOR, GRDRM_TYPE_PLANE));
- assert(object->free_fn);
-
- hashmap_remove_value(object->card->object_map, UINT32_TO_PTR(object->id), object);
-
- object->free_fn(object);
- return NULL;
-}
-
-/*
- * Planes
- */
-
-static void plane_free(grdrm_object *object) {
- grdrm_plane *plane = plane_from_object(object);
-
- free(plane->kern.formats);
- free(plane->kern.crtcs);
- free(plane);
-}
-
-int grdrm_plane_new(grdrm_plane **out, grdrm_card *card, uint32_t id, uint32_t index) {
- _cleanup_(grdrm_object_freep) grdrm_object *object = NULL;
- grdrm_plane *plane;
- int r;
-
- assert(card);
-
- plane = new0(grdrm_plane, 1);
- if (!plane)
- return -ENOMEM;
-
- object = &plane->object;
- *object = GRDRM_OBJECT_INIT(card, id, index, GRDRM_TYPE_PLANE, plane_free);
-
- plane->kern.max_crtcs = 32;
- plane->kern.crtcs = new0(uint32_t, plane->kern.max_crtcs);
- if (!plane->kern.crtcs)
- return -ENOMEM;
-
- plane->kern.max_formats = 32;
- plane->kern.formats = new0(uint32_t, plane->kern.max_formats);
- if (!plane->kern.formats)
- return -ENOMEM;
-
- r = grdrm_object_add(object);
- if (r < 0)
- return r;
-
- if (out)
- *out = plane;
- object = NULL;
- return 0;
-}
-
-static int grdrm_plane_resync(grdrm_plane *plane) {
- grdrm_card *card = plane->object.card;
- size_t tries;
- int r;
-
- assert(plane);
-
- for (tries = 0; tries < GRDRM_MAX_TRIES; ++tries) {
- struct drm_mode_get_plane res;
- grdrm_object *object;
- bool resized = false;
- Iterator iter;
-
- zero(res);
- res.plane_id = plane->object.id;
- res.format_type_ptr = PTR_TO_UINT64(plane->kern.formats);
- res.count_format_types = plane->kern.max_formats;
-
- r = ioctl(card->fd, DRM_IOCTL_MODE_GETPLANE, &res);
- if (r < 0) {
- r = -errno;
- if (r == -ENOENT) {
- card->async_hotplug = true;
- r = 0;
- log_debug("grdrm: %s: plane %u removed during resync",
- card->base.name, plane->object.id);
- } else {
- log_debug_errno(errno, "grdrm: %s: cannot retrieve plane %u: %m",
- card->base.name, plane->object.id);
- }
-
- return r;
- }
-
- plane->kern.n_crtcs = 0;
- memzero(plane->kern.crtcs, sizeof(uint32_t) * plane->kern.max_crtcs);
-
- HASHMAP_FOREACH(object, card->object_map, iter) {
- if (object->type != GRDRM_TYPE_CRTC || object->index >= 32)
- continue;
- if (!(res.possible_crtcs & (1 << object->index)))
- continue;
- if (plane->kern.n_crtcs >= 32) {
- log_debug("grdrm: %s: possible_crtcs of plane %" PRIu32 " exceeds 32bit mask",
- card->base.name, plane->object.id);
- continue;
- }
-
- plane->kern.crtcs[plane->kern.n_crtcs++] = object->id;
- }
-
- if (res.count_format_types > plane->kern.max_formats) {
- uint32_t max, *t;
-
- max = ALIGN_POWER2(res.count_format_types);
- if (!max || max > UINT16_MAX) {
- log_debug("grdrm: %s: excessive plane resource limit: %" PRIu32, card->base.name, max);
- return -ERANGE;
- }
-
- t = realloc(plane->kern.formats, sizeof(*t) * max);
- if (!t)
- return -ENOMEM;
-
- plane->kern.formats = t;
- plane->kern.max_formats = max;
- resized = true;
- }
-
- if (resized)
- continue;
-
- plane->kern.n_formats = res.count_format_types;
- plane->kern.used_crtc = res.crtc_id;
- plane->kern.used_fb = res.fb_id;
- plane->kern.gamma_size = res.gamma_size;
-
- break;
- }
-
- if (tries >= GRDRM_MAX_TRIES) {
- log_debug("grdrm: %s: plane %u not settled for retrieval", card->base.name, plane->object.id);
- return -EFAULT;
- }
-
- return 0;
-}
-
-/*
- * Connectors
- */
-
-static void connector_free(grdrm_object *object) {
- grdrm_connector *connector = connector_from_object(object);
-
- free(connector->kern.prop_values);
- free(connector->kern.prop_ids);
- free(connector->kern.modes);
- free(connector->kern.encoders);
- free(connector);
-}
-
-int grdrm_connector_new(grdrm_connector **out, grdrm_card *card, uint32_t id, uint32_t index) {
- _cleanup_(grdrm_object_freep) grdrm_object *object = NULL;
- grdrm_connector *connector;
- int r;
-
- assert(card);
-
- connector = new0(grdrm_connector, 1);
- if (!connector)
- return -ENOMEM;
-
- object = &connector->object;
- *object = GRDRM_OBJECT_INIT(card, id, index, GRDRM_TYPE_CONNECTOR, connector_free);
-
- connector->kern.max_encoders = 32;
- connector->kern.encoders = new0(uint32_t, connector->kern.max_encoders);
- if (!connector->kern.encoders)
- return -ENOMEM;
-
- connector->kern.max_modes = 32;
- connector->kern.modes = new0(struct drm_mode_modeinfo, connector->kern.max_modes);
- if (!connector->kern.modes)
- return -ENOMEM;
-
- connector->kern.max_props = 32;
- connector->kern.prop_ids = new0(uint32_t, connector->kern.max_props);
- connector->kern.prop_values = new0(uint64_t, connector->kern.max_props);
- if (!connector->kern.prop_ids || !connector->kern.prop_values)
- return -ENOMEM;
-
- r = grdrm_object_add(object);
- if (r < 0)
- return r;
-
- if (out)
- *out = connector;
- object = NULL;
- return 0;
-}
-
-static int grdrm_connector_resync(grdrm_connector *connector) {
- grdrm_card *card = connector->object.card;
- size_t tries;
- int r;
-
- assert(connector);
-
- for (tries = 0; tries < GRDRM_MAX_TRIES; ++tries) {
- struct drm_mode_get_connector res;
- bool resized = false;
- uint32_t max;
-
- zero(res);
- res.connector_id = connector->object.id;
- res.encoders_ptr = PTR_TO_UINT64(connector->kern.encoders);
- res.props_ptr = PTR_TO_UINT64(connector->kern.prop_ids);
- res.prop_values_ptr = PTR_TO_UINT64(connector->kern.prop_values);
- res.count_encoders = connector->kern.max_encoders;
- res.count_props = connector->kern.max_props;
-
- /* The kernel reads modes from the EDID information only if we
- * pass count_modes==0. This is a legacy hack for libdrm (which
- * called every ioctl twice). Now we have to adopt.. *sigh*.
- * If we never received an hotplug event, there's no reason to
- * sync modes. EDID reads are heavy, so skip that if not
- * required. */
- if (card->hotplug) {
- if (tries > 0) {
- res.modes_ptr = PTR_TO_UINT64(connector->kern.modes);
- res.count_modes = connector->kern.max_modes;
- } else {
- resized = true;
- }
- }
-
- r = ioctl(card->fd, DRM_IOCTL_MODE_GETCONNECTOR, &res);
- if (r < 0) {
- r = -errno;
- if (r == -ENOENT) {
- card->async_hotplug = true;
- r = 0;
- log_debug("grdrm: %s: connector %u removed during resync",
- card->base.name, connector->object.id);
- } else {
- log_debug_errno(errno, "grdrm: %s: cannot retrieve connector %u: %m",
- card->base.name, connector->object.id);
- }
-
- return r;
- }
-
- if (res.count_encoders > connector->kern.max_encoders) {
- uint32_t *t;
-
- max = ALIGN_POWER2(res.count_encoders);
- if (!max || max > UINT16_MAX) {
- log_debug("grdrm: %s: excessive connector resource limit: %" PRIu32, card->base.name, max);
- return -ERANGE;
- }
-
- t = realloc(connector->kern.encoders, sizeof(*t) * max);
- if (!t)
- return -ENOMEM;
-
- connector->kern.encoders = t;
- connector->kern.max_encoders = max;
- resized = true;
- }
-
- if (res.count_modes > connector->kern.max_modes) {
- struct drm_mode_modeinfo *t;
-
- max = ALIGN_POWER2(res.count_modes);
- if (!max || max > UINT16_MAX) {
- log_debug("grdrm: %s: excessive connector resource limit: %" PRIu32, card->base.name, max);
- return -ERANGE;
- }
-
- t = realloc(connector->kern.modes, sizeof(*t) * max);
- if (!t)
- return -ENOMEM;
-
- connector->kern.modes = t;
- connector->kern.max_modes = max;
- resized = true;
- }
-
- if (res.count_props > connector->kern.max_props) {
- uint32_t *tids;
- uint64_t *tvals;
-
- max = ALIGN_POWER2(res.count_props);
- if (!max || max > UINT16_MAX) {
- log_debug("grdrm: %s: excessive connector resource limit: %" PRIu32, card->base.name, max);
- return -ERANGE;
- }
-
- tids = realloc(connector->kern.prop_ids, sizeof(*tids) * max);
- if (!tids)
- return -ENOMEM;
- connector->kern.prop_ids = tids;
-
- tvals = realloc(connector->kern.prop_values, sizeof(*tvals) * max);
- if (!tvals)
- return -ENOMEM;
- connector->kern.prop_values = tvals;
-
- connector->kern.max_props = max;
- resized = true;
- }
-
- if (resized)
- continue;
-
- connector->kern.n_encoders = res.count_encoders;
- connector->kern.n_props = res.count_props;
- connector->kern.type = res.connector_type;
- connector->kern.type_id = res.connector_type_id;
- connector->kern.used_encoder = res.encoder_id;
- connector->kern.connection = res.connection;
- connector->kern.mm_width = res.mm_width;
- connector->kern.mm_height = res.mm_height;
- connector->kern.subpixel = res.subpixel;
- if (res.modes_ptr == PTR_TO_UINT64(connector->kern.modes))
- connector->kern.n_modes = res.count_modes;
-
- break;
- }
-
- if (tries >= GRDRM_MAX_TRIES) {
- log_debug("grdrm: %s: connector %u not settled for retrieval", card->base.name, connector->object.id);
- return -EFAULT;
- }
-
- return 0;
-}
-
-/*
- * Encoders
- */
-
-static void encoder_free(grdrm_object *object) {
- grdrm_encoder *encoder = encoder_from_object(object);
-
- free(encoder->kern.clones);
- free(encoder->kern.crtcs);
- free(encoder);
-}
-
-int grdrm_encoder_new(grdrm_encoder **out, grdrm_card *card, uint32_t id, uint32_t index) {
- _cleanup_(grdrm_object_freep) grdrm_object *object = NULL;
- grdrm_encoder *encoder;
- int r;
-
- assert(card);
-
- encoder = new0(grdrm_encoder, 1);
- if (!encoder)
- return -ENOMEM;
-
- object = &encoder->object;
- *object = GRDRM_OBJECT_INIT(card, id, index, GRDRM_TYPE_ENCODER, encoder_free);
-
- encoder->kern.max_crtcs = 32;
- encoder->kern.crtcs = new0(uint32_t, encoder->kern.max_crtcs);
- if (!encoder->kern.crtcs)
- return -ENOMEM;
-
- encoder->kern.max_clones = 32;
- encoder->kern.clones = new0(uint32_t, encoder->kern.max_clones);
- if (!encoder->kern.clones)
- return -ENOMEM;
-
- r = grdrm_object_add(object);
- if (r < 0)
- return r;
-
- if (out)
- *out = encoder;
- object = NULL;
- return 0;
-}
-
-static int grdrm_encoder_resync(grdrm_encoder *encoder) {
- grdrm_card *card = encoder->object.card;
- struct drm_mode_get_encoder res;
- grdrm_object *object;
- Iterator iter;
- int r;
-
- assert(encoder);
-
- zero(res);
- res.encoder_id = encoder->object.id;
-
- r = ioctl(card->fd, DRM_IOCTL_MODE_GETENCODER, &res);
- if (r < 0) {
- r = -errno;
- if (r == -ENOENT) {
- card->async_hotplug = true;
- r = 0;
- log_debug("grdrm: %s: encoder %u removed during resync",
- card->base.name, encoder->object.id);
- } else {
- log_debug_errno(errno, "grdrm: %s: cannot retrieve encoder %u: %m",
- card->base.name, encoder->object.id);
- }
-
- return r;
- }
-
- encoder->kern.type = res.encoder_type;
- encoder->kern.used_crtc = res.crtc_id;
-
- encoder->kern.n_crtcs = 0;
- memzero(encoder->kern.crtcs, sizeof(uint32_t) * encoder->kern.max_crtcs);
-
- HASHMAP_FOREACH(object, card->object_map, iter) {
- if (object->type != GRDRM_TYPE_CRTC || object->index >= 32)
- continue;
- if (!(res.possible_crtcs & (1 << object->index)))
- continue;
- if (encoder->kern.n_crtcs >= 32) {
- log_debug("grdrm: %s: possible_crtcs exceeds 32bit mask", card->base.name);
- continue;
- }
-
- encoder->kern.crtcs[encoder->kern.n_crtcs++] = object->id;
- }
-
- encoder->kern.n_clones = 0;
- memzero(encoder->kern.clones, sizeof(uint32_t) * encoder->kern.max_clones);
-
- HASHMAP_FOREACH(object, card->object_map, iter) {
- if (object->type != GRDRM_TYPE_ENCODER || object->index >= 32)
- continue;
- if (!(res.possible_clones & (1 << object->index)))
- continue;
- if (encoder->kern.n_clones >= 32) {
- log_debug("grdrm: %s: possible_encoders exceeds 32bit mask", card->base.name);
- continue;
- }
-
- encoder->kern.clones[encoder->kern.n_clones++] = object->id;
- }
-
- return 0;
-}
-
-/*
- * Crtcs
- */
-
-static void crtc_free(grdrm_object *object) {
- grdrm_crtc *crtc = crtc_from_object(object);
-
- if (crtc->pipe)
- grdev_pipe_free(&crtc->pipe->base);
- free(crtc->set.connectors);
- free(crtc->old.connectors);
- free(crtc->kern.used_connectors);
- free(crtc);
-}
-
-int grdrm_crtc_new(grdrm_crtc **out, grdrm_card *card, uint32_t id, uint32_t index) {
- _cleanup_(grdrm_object_freep) grdrm_object *object = NULL;
- grdrm_crtc *crtc;
- int r;
-
- assert(card);
-
- crtc = new0(grdrm_crtc, 1);
- if (!crtc)
- return -ENOMEM;
-
- object = &crtc->object;
- *object = GRDRM_OBJECT_INIT(card, id, index, GRDRM_TYPE_CRTC, crtc_free);
-
- crtc->kern.max_used_connectors = 32;
- crtc->kern.used_connectors = new0(uint32_t, crtc->kern.max_used_connectors);
- if (!crtc->kern.used_connectors)
- return -ENOMEM;
-
- crtc->old.connectors = new0(uint32_t, crtc->kern.max_used_connectors);
- if (!crtc->old.connectors)
- return -ENOMEM;
-
- r = grdrm_object_add(object);
- if (r < 0)
- return r;
-
- if (out)
- *out = crtc;
- object = NULL;
- return 0;
-}
-
-static int grdrm_crtc_resync(grdrm_crtc *crtc) {
- grdrm_card *card = crtc->object.card;
- struct drm_mode_crtc res = { .crtc_id = crtc->object.id };
- int r;
-
- assert(crtc);
-
- /* make sure we can cache any combination later */
- if (card->n_connectors > crtc->kern.max_used_connectors) {
- uint32_t max, *t;
-
- max = ALIGN_POWER2(card->n_connectors);
- if (!max)
- return -ENOMEM;
-
- t = realloc_multiply(crtc->kern.used_connectors, sizeof(*t), max);
- if (!t)
- return -ENOMEM;
-
- crtc->kern.used_connectors = t;
- crtc->kern.max_used_connectors = max;
-
- if (!crtc->old.set) {
- crtc->old.connectors = calloc(sizeof(*t), max);
- if (!crtc->old.connectors)
- return -ENOMEM;
- }
- }
-
- /* GETCRTC doesn't return connectors. We have to read all
- * encoder-state and deduce the setup ourselves.. */
- crtc->kern.n_used_connectors = 0;
-
- r = ioctl(card->fd, DRM_IOCTL_MODE_GETCRTC, &res);
- if (r < 0) {
- r = -errno;
- if (r == -ENOENT) {
- card->async_hotplug = true;
- r = 0;
- log_debug("grdrm: %s: crtc %u removed during resync",
- card->base.name, crtc->object.id);
- } else {
- log_debug_errno(errno, "grdrm: %s: cannot retrieve crtc %u: %m",
- card->base.name, crtc->object.id);
- }
-
- return r;
- }
-
- crtc->kern.used_fb = res.fb_id;
- crtc->kern.fb_offset_x = res.x;
- crtc->kern.fb_offset_y = res.y;
- crtc->kern.gamma_size = res.gamma_size;
- crtc->kern.mode_set = res.mode_valid;
- crtc->kern.mode = res.mode;
-
- return 0;
-}
-
-static void grdrm_crtc_assign(grdrm_crtc *crtc, grdrm_connector *connector) {
- uint32_t n_connectors;
- int r;
-
- assert(crtc);
- assert(!crtc->object.assigned);
- assert(!connector || !connector->object.assigned);
-
- /* always mark both as assigned; even if assignments cannot be set */
- crtc->object.assigned = true;
- if (connector)
- connector->object.assigned = true;
-
- /* we will support hw clone mode in the future */
- n_connectors = connector ? 1 : 0;
-
- /* bail out if configuration is preserved */
- if (crtc->set.n_connectors == n_connectors &&
- (n_connectors == 0 || crtc->set.connectors[0] == connector->object.id))
- return;
-
- crtc->applied = false;
- crtc->set.n_connectors = 0;
-
- if (n_connectors > crtc->set.max_connectors) {
- uint32_t max, *t;
-
- max = ALIGN_POWER2(n_connectors);
- if (!max) {
- r = -ENOMEM;
- goto error;
- }
-
- t = realloc(crtc->set.connectors, sizeof(*t) * max);
- if (!t) {
- r = -ENOMEM;
- goto error;
- }
-
- crtc->set.connectors = t;
- crtc->set.max_connectors = max;
- }
-
- if (connector) {
- struct drm_mode_modeinfo *m, *pref = NULL;
- uint32_t i;
-
- for (i = 0; i < connector->kern.n_modes; ++i) {
- m = &connector->kern.modes[i];
-
- /* ignore 3D modes by default */
- if (m->flags & DRM_MODE_FLAG_3D_MASK)
- continue;
-
- if (!pref) {
- pref = m;
- continue;
- }
-
- /* use PREFERRED over non-PREFERRED */
- if ((pref->type & DRM_MODE_TYPE_PREFERRED) &&
- !(m->type & DRM_MODE_TYPE_PREFERRED))
- continue;
-
- /* use DRIVER over non-PREFERRED|DRIVER */
- if ((pref->type & DRM_MODE_TYPE_DRIVER) &&
- !(m->type & (DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED)))
- continue;
-
- /* always prefer higher resolution */
- if (pref->hdisplay > m->hdisplay ||
- (pref->hdisplay == m->hdisplay && pref->vdisplay > m->vdisplay))
- continue;
-
- pref = m;
- }
-
- if (pref) {
- crtc->set.mode = *pref;
- crtc->set.n_connectors = 1;
- crtc->set.connectors[0] = connector->object.id;
- log_debug("grdrm: %s: assigned connector %" PRIu32 " to crtc %" PRIu32 " with mode %s",
- crtc->object.card->base.name, connector->object.id, crtc->object.id, pref->name);
- } else {
- log_debug("grdrm: %s: connector %" PRIu32 " to be assigned but has no valid mode",
- crtc->object.card->base.name, connector->object.id);
- }
- }
-
- return;
-
-error:
- log_debug("grdrm: %s: cannot assign crtc %" PRIu32 ": %s",
- crtc->object.card->base.name, crtc->object.id, strerror(-r));
-}
-
-static void grdrm_crtc_expose(grdrm_crtc *crtc) {
- grdrm_pipe *pipe;
- grdrm_fb *fb;
- size_t i;
- int r;
-
- assert(crtc);
- assert(crtc->object.assigned);
-
- if (crtc->set.n_connectors < 1) {
- if (crtc->pipe)
- grdev_pipe_free(&crtc->pipe->base);
- crtc->pipe = NULL;
- return;
- }
-
- pipe = crtc->pipe;
- if (pipe) {
- if (pipe->base.width != crtc->set.mode.hdisplay ||
- pipe->base.height != crtc->set.mode.vdisplay ||
- pipe->base.vrefresh != crtc->set.mode.vrefresh) {
- grdev_pipe_free(&pipe->base);
- crtc->pipe = NULL;
- pipe = NULL;
- }
- }
-
- if (crtc->pipe) {
- pipe->base.front = NULL;
- pipe->base.back = NULL;
- for (i = 0; i < pipe->base.max_fbs; ++i) {
- fb = fb_from_base(pipe->base.fbs[i]);
- if (fb->id == crtc->kern.used_fb)
- pipe->base.front = &fb->base;
- else if (!fb->flipid)
- pipe->base.back = &fb->base;
- }
- } else {
- r = grdrm_pipe_new(&pipe, crtc, &crtc->set.mode, 2);
- if (r < 0) {
- log_debug("grdrm: %s: cannot create pipe for crtc %" PRIu32 ": %s",
- crtc->object.card->base.name, crtc->object.id, strerror(-r));
- return;
- }
-
- for (i = 0; i < pipe->base.max_fbs; ++i) {
- r = grdrm_fb_new(&fb, crtc->object.card, &crtc->set.mode);
- if (r < 0) {
- log_debug("grdrm: %s: cannot allocate framebuffer for crtc %" PRIu32 ": %s",
- crtc->object.card->base.name, crtc->object.id, strerror(-r));
- grdev_pipe_free(&pipe->base);
- return;
- }
-
- pipe->base.fbs[i] = &fb->base;
- }
-
- pipe->base.front = NULL;
- pipe->base.back = pipe->base.fbs[0];
- crtc->pipe = pipe;
- }
-
- grdev_pipe_ready(&crtc->pipe->base, true);
-}
-
-static void grdrm_crtc_commit_deep(grdrm_crtc *crtc, grdev_fb *basefb) {
- struct drm_mode_crtc set_crtc = { .crtc_id = crtc->object.id };
- grdrm_card *card = crtc->object.card;
- grdrm_pipe *pipe = crtc->pipe;
- grdrm_fb *fb;
- int r;
-
- assert(crtc);
- assert(basefb);
- assert(pipe);
-
- fb = fb_from_base(basefb);
-
- set_crtc.set_connectors_ptr = PTR_TO_UINT64(crtc->set.connectors);
- set_crtc.count_connectors = crtc->set.n_connectors;
- set_crtc.fb_id = fb->id;
- set_crtc.x = 0;
- set_crtc.y = 0;
- set_crtc.mode_valid = 1;
- set_crtc.mode = crtc->set.mode;
-
- r = ioctl(card->fd, DRM_IOCTL_MODE_SETCRTC, &set_crtc);
- if (r < 0) {
- r = -errno;
- log_debug_errno(errno, "grdrm: %s: cannot set crtc %" PRIu32 ": %m",
- card->base.name, crtc->object.id);
-
- grdrm_card_async(card, r);
- return;
- }
-
- if (!crtc->applied) {
- log_debug("grdrm: %s: crtc %" PRIu32 " applied via deep modeset",
- card->base.name, crtc->object.id);
- crtc->applied = true;
- }
-
- pipe->base.back = NULL;
- pipe->base.front = &fb->base;
- fb->flipid = 0;
- ++pipe->counter;
- pipe->base.flipping = false;
- pipe->base.flip = false;
-
- /* We cannot schedule dummy page-flips on pipes, hence, the
- * application would have to schedule their own frame-timers.
- * To avoid duplicating that everywhere, we schedule our own
- * timer and raise a fake FRAME event when it fires. */
- grdev_pipe_schedule(&pipe->base, 1);
-}
-
-static int grdrm_crtc_commit_flip(grdrm_crtc *crtc, grdev_fb *basefb) {
- struct drm_mode_crtc_page_flip page_flip = { .crtc_id = crtc->object.id };
- grdrm_card *card = crtc->object.card;
- grdrm_pipe *pipe = crtc->pipe;
- grdrm_fb *fb;
- uint32_t cnt;
- int r;
-
- assert(crtc);
- assert(basefb);
- assert(pipe);
-
- if (!crtc->applied) {
- if (!grdrm_modes_compatible(&crtc->kern.mode, &crtc->set.mode))
- return 0;
-
- /* TODO: Theoretically, we should be able to page-flip to our
- * framebuffer here. We didn't perform any deep modeset, but the
- * DRM driver is really supposed to reject our page-flip in case
- * the FB is not compatible. We then properly fall back to a
- * deep modeset.
- * As it turns out, drivers don't to this. Therefore, we need to
- * perform a full modeset on enter now. We might avoid this in
- * the future with fixed drivers.. */
-
- return 0;
- }
-
- fb = fb_from_base(basefb);
-
- cnt = ++pipe->counter ? : ++pipe->counter;
- page_flip.fb_id = fb->id;
- page_flip.flags = DRM_MODE_PAGE_FLIP_EVENT;
- page_flip.user_data = grdrm_encode_vblank_data(crtc->object.id, cnt);
-
- r = ioctl(card->fd, DRM_IOCTL_MODE_PAGE_FLIP, &page_flip);
- if (r < 0) {
- r = -errno;
- /* Avoid excessive logging on EINVAL; it is currently not
- * possible to see whether cards support page-flipping, so
- * avoid logging on each frame. */
- if (r != -EINVAL)
- log_debug_errno(errno, "grdrm: %s: cannot schedule page-flip on crtc %" PRIu32 ": %m",
- card->base.name, crtc->object.id);
-
- if (grdrm_card_async(card, r))
- return r;
-
- return 0;
- }
-
- if (!crtc->applied) {
- log_debug("grdrm: %s: crtc %" PRIu32 " applied via page flip",
- card->base.name, crtc->object.id);
- crtc->applied = true;
- }
-
- pipe->base.flipping = true;
- pipe->base.flip = false;
- pipe->counter = cnt;
- fb->flipid = cnt;
- pipe->base.back = NULL;
-
- /* Raise fake FRAME event if it takes longer than 2
- * frames to receive the pageflip event. We assume the
- * queue ran over or some other error happened. */
- grdev_pipe_schedule(&pipe->base, 2);
-
- return 1;
-}
-
-static void grdrm_crtc_commit(grdrm_crtc *crtc) {
- struct drm_mode_crtc set_crtc = { .crtc_id = crtc->object.id };
- grdrm_card *card = crtc->object.card;
- grdrm_pipe *pipe;
- grdev_fb *fb;
- int r;
-
- assert(crtc);
- assert(crtc->object.assigned);
-
- pipe = crtc->pipe;
- if (!pipe) {
- /* If a crtc is not assigned any connector, we want any
- * previous setup to be cleared, so make sure the CRTC is
- * disabled. Otherwise, there might be content on the CRTC
- * while we run, which is not what we want.
- * If you want to avoid modesets on specific CRTCs, you should
- * still keep their assignment, but never enable the resulting
- * pipe. This way, we wouldn't touch it at all. */
- if (!crtc->applied) {
- crtc->applied = true;
- r = ioctl(card->fd, DRM_IOCTL_MODE_SETCRTC, &set_crtc);
- if (r < 0) {
- r = -errno;
- log_debug_errno(errno, "grdrm: %s: cannot shutdown crtc %" PRIu32 ": %m",
- card->base.name, crtc->object.id);
-
- grdrm_card_async(card, r);
- return;
- }
-
- log_debug("grdrm: %s: crtc %" PRIu32 " applied via shutdown",
- card->base.name, crtc->object.id);
- }
-
- return;
- }
-
- /* we always fully ignore disabled pipes */
- if (!pipe->base.enabled)
- return;
-
- assert(crtc->set.n_connectors > 0);
-
- if (pipe->base.flip)
- fb = pipe->base.back;
- else if (!crtc->applied)
- fb = pipe->base.front;
- else
- return;
-
- if (!fb)
- return;
-
- r = grdrm_crtc_commit_flip(crtc, fb);
- if (r == 0) {
- /* in case we couldn't page-flip, perform deep modeset */
- grdrm_crtc_commit_deep(crtc, fb);
- }
-}
-
-static void grdrm_crtc_restore(grdrm_crtc *crtc) {
- struct drm_mode_crtc set_crtc = { .crtc_id = crtc->object.id };
- grdrm_card *card = crtc->object.card;
- int r;
-
- if (!crtc->old.set)
- return;
-
- set_crtc.set_connectors_ptr = PTR_TO_UINT64(crtc->old.connectors);
- set_crtc.count_connectors = crtc->old.n_connectors;
- set_crtc.fb_id = crtc->old.fb;
- set_crtc.x = crtc->old.fb_x;
- set_crtc.y = crtc->old.fb_y;
- set_crtc.gamma_size = crtc->old.gamma;
- set_crtc.mode_valid = crtc->old.mode_set;
- set_crtc.mode = crtc->old.mode;
-
- r = ioctl(card->fd, DRM_IOCTL_MODE_SETCRTC, &set_crtc);
- if (r < 0) {
- r = -errno;
- log_debug_errno(errno, "grdrm: %s: cannot restore crtc %" PRIu32 ": %m",
- card->base.name, crtc->object.id);
-
- grdrm_card_async(card, r);
- return;
- }
-
- if (crtc->pipe) {
- ++crtc->pipe->counter;
- crtc->pipe->base.front = NULL;
- crtc->pipe->base.flipping = false;
- }
-
- log_debug("grdrm: %s: crtc %" PRIu32 " restored", card->base.name, crtc->object.id);
-}
-
-static void grdrm_crtc_flip_complete(grdrm_crtc *crtc, uint32_t counter, struct drm_event_vblank *event) {
- bool flipped = false;
- grdrm_pipe *pipe;
- size_t i;
-
- assert(crtc);
- assert(event);
-
- pipe = crtc->pipe;
- if (!pipe)
- return;
-
- /* We got a page-flip event. To be safe, we reset all FBs on the same
- * pipe that have smaller flipids than the flip we got as we know they
- * are executed in order. We need to do this to guarantee
- * queue-overflows or other missed events don't cause starvation.
- * Furthermore, if we find the exact FB this event is for, *and* this
- * is the most recent event, we mark it as front FB and raise a
- * frame event. */
-
- for (i = 0; i < pipe->base.max_fbs; ++i) {
- grdrm_fb *fb;
-
- if (!pipe->base.fbs[i])
- continue;
-
- fb = fb_from_base(pipe->base.fbs[i]);
- if (counter != 0 && counter == pipe->counter && fb->flipid == counter) {
- pipe->base.front = &fb->base;
- fb->flipid = 0;
- flipped = true;
- } else if (counter - fb->flipid < UINT16_MAX) {
- fb->flipid = 0;
- }
- }
-
- if (flipped) {
- crtc->pipe->base.flipping = false;
- grdev_pipe_frame(&pipe->base);
- }
-}
-
-/*
- * Framebuffers
- */
-
-static int grdrm_fb_new(grdrm_fb **out, grdrm_card *card, const struct drm_mode_modeinfo *mode) {
- _cleanup_(grdrm_fb_freep) grdrm_fb *fb = NULL;
- struct drm_mode_create_dumb create_dumb = { };
- struct drm_mode_map_dumb map_dumb = { };
- struct drm_mode_fb_cmd2 add_fb = { };
- unsigned int i;
- int r;
-
- assert_return(out, -EINVAL);
- assert_return(card, -EINVAL);
-
- fb = new0(grdrm_fb, 1);
- if (!fb)
- return -ENOMEM;
-
- /* TODO: we should choose a compatible format of the previous CRTC
- * setting to allow page-flip to it. Only choose fallback if the
- * previous setting was crap (non xrgb32'ish). */
-
- fb->card = card;
- fb->base.format = DRM_FORMAT_XRGB8888;
- fb->base.width = mode->hdisplay;
- fb->base.height = mode->vdisplay;
-
- for (i = 0; i < ELEMENTSOF(fb->base.maps); ++i)
- fb->base.maps[i] = MAP_FAILED;
-
- create_dumb.width = fb->base.width;
- create_dumb.height = fb->base.height;
- create_dumb.bpp = 32;
-
- r = ioctl(card->fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_dumb);
- if (r < 0) {
- r = negative_errno();
- log_debug_errno(errno, "grdrm: %s: cannot create dumb buffer %" PRIu32 "x%" PRIu32": %m",
- card->base.name, fb->base.width, fb->base.height);
- return r;
- }
-
- fb->handles[0] = create_dumb.handle;
- fb->base.strides[0] = create_dumb.pitch;
- fb->sizes[0] = create_dumb.size;
-
- map_dumb.handle = fb->handles[0];
-
- r = ioctl(card->fd, DRM_IOCTL_MODE_MAP_DUMB, &map_dumb);
- if (r < 0) {
- r = negative_errno();
- log_debug_errno(errno, "grdrm: %s: cannot map dumb buffer %" PRIu32 "x%" PRIu32": %m",
- card->base.name, fb->base.width, fb->base.height);
- return r;
- }
-
- fb->base.maps[0] = mmap(0, fb->sizes[0], PROT_WRITE, MAP_SHARED, card->fd, map_dumb.offset);
- if (fb->base.maps[0] == MAP_FAILED) {
- r = negative_errno();
- log_debug_errno(errno, "grdrm: %s: cannot memory-map dumb buffer %" PRIu32 "x%" PRIu32": %m",
- card->base.name, fb->base.width, fb->base.height);
- return r;
- }
-
- memzero(fb->base.maps[0], fb->sizes[0]);
-
- add_fb.width = fb->base.width;
- add_fb.height = fb->base.height;
- add_fb.pixel_format = fb->base.format;
- add_fb.flags = 0;
- memcpy(add_fb.handles, fb->handles, sizeof(fb->handles));
- memcpy(add_fb.pitches, fb->base.strides, sizeof(fb->base.strides));
- memcpy(add_fb.offsets, fb->offsets, sizeof(fb->offsets));
-
- r = ioctl(card->fd, DRM_IOCTL_MODE_ADDFB2, &add_fb);
- if (r < 0) {
- r = negative_errno();
- log_debug_errno(errno, "grdrm: %s: cannot add framebuffer %" PRIu32 "x%" PRIu32": %m",
- card->base.name, fb->base.width, fb->base.height);
- return r;
- }
-
- fb->id = add_fb.fb_id;
-
- *out = fb;
- fb = NULL;
- return 0;
-}
-
-grdrm_fb *grdrm_fb_free(grdrm_fb *fb) {
- unsigned int i;
- int r;
-
- if (!fb)
- return NULL;
-
- assert(fb->card);
-
- if (fb->base.free_fn)
- fb->base.free_fn(fb->base.data.ptr);
-
- if (fb->id > 0 && fb->card->fd >= 0) {
- r = ioctl(fb->card->fd, DRM_IOCTL_MODE_RMFB, fb->id);
- if (r < 0)
- log_debug_errno(errno, "grdrm: %s: cannot delete framebuffer %" PRIu32 ": %m",
- fb->card->base.name, fb->id);
- }
-
- for (i = 0; i < ELEMENTSOF(fb->handles); ++i) {
- struct drm_mode_destroy_dumb destroy_dumb = { };
-
- if (fb->base.maps[i] != MAP_FAILED)
- munmap(fb->base.maps[i], fb->sizes[i]);
-
- if (fb->handles[i] > 0 && fb->card->fd >= 0) {
- destroy_dumb.handle = fb->handles[i];
- r = ioctl(fb->card->fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_dumb);
- if (r < 0)
- log_debug_errno(errno, "grdrm: %s: cannot destroy dumb-buffer %" PRIu32 ": %m",
- fb->card->base.name, fb->handles[i]);
- }
- }
-
- free(fb);
-
- return NULL;
-}
-
-/*
- * Pipes
- */
-
-static void grdrm_pipe_name(char *out, grdrm_crtc *crtc) {
- /* @out must be at least of size GRDRM_PIPE_NAME_MAX */
- sprintf(out, "%s/%" PRIu32, crtc->object.card->base.name, crtc->object.id);
-}
-
-static int grdrm_pipe_new(grdrm_pipe **out, grdrm_crtc *crtc, struct drm_mode_modeinfo *mode, size_t n_fbs) {
- _cleanup_(grdev_pipe_freep) grdev_pipe *basepipe = NULL;
- grdrm_card *card = crtc->object.card;
- char name[GRDRM_PIPE_NAME_MAX];
- grdrm_pipe *pipe;
- int r;
-
- assert_return(crtc, -EINVAL);
- assert_return(grdev_is_drm_card(&card->base), -EINVAL);
-
- pipe = new0(grdrm_pipe, 1);
- if (!pipe)
- return -ENOMEM;
-
- basepipe = &pipe->base;
- pipe->base = GRDEV_PIPE_INIT(&grdrm_pipe_vtable, &card->base);
- pipe->crtc = crtc;
- pipe->base.width = mode->hdisplay;
- pipe->base.height = mode->vdisplay;
- pipe->base.vrefresh = mode->vrefresh ? : 25;
-
- grdrm_pipe_name(name, crtc);
- r = grdev_pipe_add(&pipe->base, name, n_fbs);
- if (r < 0)
- return r;
-
- if (out)
- *out = pipe;
- basepipe = NULL;
- return 0;
-}
-
-static void grdrm_pipe_free(grdev_pipe *basepipe) {
- grdrm_pipe *pipe = grdrm_pipe_from_base(basepipe);
- size_t i;
-
- assert(pipe->crtc);
-
- for (i = 0; i < pipe->base.max_fbs; ++i)
- if (pipe->base.fbs[i])
- grdrm_fb_free(fb_from_base(pipe->base.fbs[i]));
-
- free(pipe);
-}
-
-static grdev_fb *grdrm_pipe_target(grdev_pipe *basepipe) {
- grdrm_fb *fb;
- size_t i;
-
- if (!basepipe->back) {
- for (i = 0; i < basepipe->max_fbs; ++i) {
- if (!basepipe->fbs[i])
- continue;
-
- fb = fb_from_base(basepipe->fbs[i]);
- if (&fb->base == basepipe->front)
- continue;
- if (basepipe->flipping && fb->flipid)
- continue;
-
- basepipe->back = &fb->base;
- break;
- }
- }
-
- return basepipe->back;
-}
-
-static void grdrm_pipe_enable(grdev_pipe *basepipe) {
- grdrm_pipe *pipe = grdrm_pipe_from_base(basepipe);
-
- pipe->crtc->applied = false;
-}
-
-static void grdrm_pipe_disable(grdev_pipe *basepipe) {
- grdrm_pipe *pipe = grdrm_pipe_from_base(basepipe);
-
- pipe->crtc->applied = false;
-}
-
-static const grdev_pipe_vtable grdrm_pipe_vtable = {
- .free = grdrm_pipe_free,
- .target = grdrm_pipe_target,
- .enable = grdrm_pipe_enable,
- .disable = grdrm_pipe_disable,
-};
-
-/*
- * Cards
- */
-
-static void grdrm_name(char *out, dev_t devnum) {
- /* @out must be at least of size GRDRM_CARD_NAME_MAX */
- sprintf(out, "drm/%u:%u", major(devnum), minor(devnum));
-}
-
-static void grdrm_card_print(grdrm_card *card) {
- grdrm_object *object;
- grdrm_crtc *crtc;
- grdrm_encoder *encoder;
- grdrm_connector *connector;
- grdrm_plane *plane;
- Iterator iter;
- uint32_t i;
- char *p, *buf;
-
- log_debug("grdrm: %s: state dump", card->base.name);
-
- log_debug(" crtcs:");
- HASHMAP_FOREACH(object, card->object_map, iter) {
- if (object->type != GRDRM_TYPE_CRTC)
- continue;
-
- crtc = crtc_from_object(object);
- log_debug(" (id: %u index: %d)", object->id, object->index);
-
- if (crtc->kern.mode_set)
- log_debug(" mode: %dx%d", crtc->kern.mode.hdisplay, crtc->kern.mode.vdisplay);
- else
- log_debug(" mode: <none>");
- }
-
- log_debug(" encoders:");
- HASHMAP_FOREACH(object, card->object_map, iter) {
- if (object->type != GRDRM_TYPE_ENCODER)
- continue;
-
- encoder = encoder_from_object(object);
- log_debug(" (id: %u index: %d)", object->id, object->index);
-
- if (encoder->kern.used_crtc)
- log_debug(" crtc: %u", encoder->kern.used_crtc);
- else
- log_debug(" crtc: <none>");
-
- buf = malloc((DECIMAL_STR_MAX(uint32_t) + 1) * encoder->kern.n_crtcs + 1);
- if (buf) {
- buf[0] = 0;
- p = buf;
-
- for (i = 0; i < encoder->kern.n_crtcs; ++i)
- p += sprintf(p, " %" PRIu32, encoder->kern.crtcs[i]);
-
- log_debug(" possible crtcs:%s", buf);
- free(buf);
- }
-
- buf = malloc((DECIMAL_STR_MAX(uint32_t) + 1) * encoder->kern.n_clones + 1);
- if (buf) {
- buf[0] = 0;
- p = buf;
-
- for (i = 0; i < encoder->kern.n_clones; ++i)
- p += sprintf(p, " %" PRIu32, encoder->kern.clones[i]);
-
- log_debug(" possible clones:%s", buf);
- free(buf);
- }
- }
-
- log_debug(" connectors:");
- HASHMAP_FOREACH(object, card->object_map, iter) {
- if (object->type != GRDRM_TYPE_CONNECTOR)
- continue;
-
- connector = connector_from_object(object);
- log_debug(" (id: %u index: %d)", object->id, object->index);
- log_debug(" type: %" PRIu32 "-%" PRIu32 " connection: %" PRIu32 " subpixel: %" PRIu32 " extents: %" PRIu32 "x%" PRIu32,
- connector->kern.type, connector->kern.type_id, connector->kern.connection, connector->kern.subpixel,
- connector->kern.mm_width, connector->kern.mm_height);
-
- if (connector->kern.used_encoder)
- log_debug(" encoder: %" PRIu32, connector->kern.used_encoder);
- else
- log_debug(" encoder: <none>");
-
- buf = malloc((DECIMAL_STR_MAX(uint32_t) + 1) * connector->kern.n_encoders + 1);
- if (buf) {
- buf[0] = 0;
- p = buf;
-
- for (i = 0; i < connector->kern.n_encoders; ++i)
- p += sprintf(p, " %" PRIu32, connector->kern.encoders[i]);
-
- log_debug(" possible encoders:%s", buf);
- free(buf);
- }
-
- for (i = 0; i < connector->kern.n_modes; ++i) {
- struct drm_mode_modeinfo *mode = &connector->kern.modes[i];
- log_debug(" mode: %" PRIu32 "x%" PRIu32, mode->hdisplay, mode->vdisplay);
- }
- }
-
- log_debug(" planes:");
- HASHMAP_FOREACH(object, card->object_map, iter) {
- if (object->type != GRDRM_TYPE_PLANE)
- continue;
-
- plane = plane_from_object(object);
- log_debug(" (id: %u index: %d)", object->id, object->index);
- log_debug(" gamma-size: %" PRIu32, plane->kern.gamma_size);
-
- if (plane->kern.used_crtc)
- log_debug(" crtc: %" PRIu32, plane->kern.used_crtc);
- else
- log_debug(" crtc: <none>");
-
- buf = malloc((DECIMAL_STR_MAX(uint32_t) + 1) * plane->kern.n_crtcs + 1);
- if (buf) {
- buf[0] = 0;
- p = buf;
-
- for (i = 0; i < plane->kern.n_crtcs; ++i)
- p += sprintf(p, " %" PRIu32, plane->kern.crtcs[i]);
-
- log_debug(" possible crtcs:%s", buf);
- free(buf);
- }
-
- buf = malloc((DECIMAL_STR_MAX(unsigned int) + 3) * plane->kern.n_formats + 1);
- if (buf) {
- buf[0] = 0;
- p = buf;
-
- for (i = 0; i < plane->kern.n_formats; ++i)
- p += sprintf(p, " 0x%x", (unsigned int)plane->kern.formats[i]);
-
- log_debug(" possible formats:%s", buf);
- free(buf);
- }
- }
-}
-
-static int grdrm_card_resync(grdrm_card *card) {
- _cleanup_free_ uint32_t *crtc_ids = NULL, *encoder_ids = NULL, *connector_ids = NULL, *plane_ids = NULL;
- uint32_t allocated = 0;
- grdrm_object *object;
- Iterator iter;
- size_t tries;
- int r;
-
- assert(card);
-
- card->async_hotplug = false;
- allocated = 0;
-
- /* mark existing objects for possible removal */
- HASHMAP_FOREACH(object, card->object_map, iter)
- object->present = false;
-
- for (tries = 0; tries < GRDRM_MAX_TRIES; ++tries) {
- struct drm_mode_get_plane_res pres;
- struct drm_mode_card_res res;
- uint32_t i, max;
-
- if (allocated < card->max_ids) {
- free(crtc_ids);
- free(encoder_ids);
- free(connector_ids);
- free(plane_ids);
- crtc_ids = new0(uint32_t, card->max_ids);
- encoder_ids = new0(uint32_t, card->max_ids);
- connector_ids = new0(uint32_t, card->max_ids);
- plane_ids = new0(uint32_t, card->max_ids);
-
- if (!crtc_ids || !encoder_ids || !connector_ids || !plane_ids)
- return -ENOMEM;
-
- allocated = card->max_ids;
- }
-
- zero(res);
- res.crtc_id_ptr = PTR_TO_UINT64(crtc_ids);
- res.connector_id_ptr = PTR_TO_UINT64(connector_ids);
- res.encoder_id_ptr = PTR_TO_UINT64(encoder_ids);
- res.count_crtcs = allocated;
- res.count_encoders = allocated;
- res.count_connectors = allocated;
-
- r = ioctl(card->fd, DRM_IOCTL_MODE_GETRESOURCES, &res);
- if (r < 0) {
- r = -errno;
- log_debug_errno(errno, "grdrm: %s: cannot retrieve drm resources: %m",
- card->base.name);
- return r;
- }
-
- zero(pres);
- pres.plane_id_ptr = PTR_TO_UINT64(plane_ids);
- pres.count_planes = allocated;
-
- r = ioctl(card->fd, DRM_IOCTL_MODE_GETPLANERESOURCES, &pres);
- if (r < 0) {
- r = -errno;
- log_debug_errno(errno, "grdrm: %s: cannot retrieve drm plane-resources: %m",
- card->base.name);
- return r;
- }
-
- max = MAX(MAX(res.count_crtcs, res.count_encoders),
- MAX(res.count_connectors, pres.count_planes));
- if (max > allocated) {
- uint32_t n;
-
- n = ALIGN_POWER2(max);
- if (!n || n > UINT16_MAX) {
- log_debug("grdrm: %s: excessive DRM resource limit: %" PRIu32,
- card->base.name, max);
- return -ERANGE;
- }
-
- /* retry with resized buffers */
- card->max_ids = n;
- continue;
- }
-
- /* mark available objects as present */
-
- for (i = 0; i < res.count_crtcs; ++i) {
- object = grdrm_find_object(card, crtc_ids[i]);
- if (object && object->type == GRDRM_TYPE_CRTC) {
- object->present = true;
- object->index = i;
- crtc_ids[i] = 0;
- }
- }
-
- for (i = 0; i < res.count_encoders; ++i) {
- object = grdrm_find_object(card, encoder_ids[i]);
- if (object && object->type == GRDRM_TYPE_ENCODER) {
- object->present = true;
- object->index = i;
- encoder_ids[i] = 0;
- }
- }
-
- for (i = 0; i < res.count_connectors; ++i) {
- object = grdrm_find_object(card, connector_ids[i]);
- if (object && object->type == GRDRM_TYPE_CONNECTOR) {
- object->present = true;
- object->index = i;
- connector_ids[i] = 0;
- }
- }
-
- for (i = 0; i < pres.count_planes; ++i) {
- object = grdrm_find_object(card, plane_ids[i]);
- if (object && object->type == GRDRM_TYPE_PLANE) {
- object->present = true;
- object->index = i;
- plane_ids[i] = 0;
- }
- }
-
- /* drop removed objects */
-
- HASHMAP_FOREACH(object, card->object_map, iter)
- if (!object->present)
- grdrm_object_free(object);
-
- /* add new objects */
-
- card->n_crtcs = res.count_crtcs;
- for (i = 0; i < res.count_crtcs; ++i) {
- if (crtc_ids[i] < 1)
- continue;
-
- r = grdrm_crtc_new(NULL, card, crtc_ids[i], i);
- if (r < 0)
- return r;
- }
-
- card->n_encoders = res.count_encoders;
- for (i = 0; i < res.count_encoders; ++i) {
- if (encoder_ids[i] < 1)
- continue;
-
- r = grdrm_encoder_new(NULL, card, encoder_ids[i], i);
- if (r < 0)
- return r;
- }
-
- card->n_connectors = res.count_connectors;
- for (i = 0; i < res.count_connectors; ++i) {
- if (connector_ids[i] < 1)
- continue;
-
- r = grdrm_connector_new(NULL, card, connector_ids[i], i);
- if (r < 0)
- return r;
- }
-
- card->n_planes = pres.count_planes;
- for (i = 0; i < pres.count_planes; ++i) {
- if (plane_ids[i] < 1)
- continue;
-
- r = grdrm_plane_new(NULL, card, plane_ids[i], i);
- if (r < 0)
- return r;
- }
-
- /* re-sync objects after object_map is synced */
-
- HASHMAP_FOREACH(object, card->object_map, iter) {
- switch (object->type) {
- case GRDRM_TYPE_CRTC:
- r = grdrm_crtc_resync(crtc_from_object(object));
- break;
- case GRDRM_TYPE_ENCODER:
- r = grdrm_encoder_resync(encoder_from_object(object));
- break;
- case GRDRM_TYPE_CONNECTOR:
- r = grdrm_connector_resync(connector_from_object(object));
- break;
- case GRDRM_TYPE_PLANE:
- r = grdrm_plane_resync(plane_from_object(object));
- break;
- default:
- assert_not_reached("grdrm: invalid object type");
- r = 0;
- }
-
- if (r < 0)
- return r;
-
- if (card->async_hotplug)
- break;
- }
-
- /* if modeset objects change during sync, start over */
- if (card->async_hotplug) {
- card->async_hotplug = false;
- continue;
- }
-
- /* cache crtc/connector relationship */
- HASHMAP_FOREACH(object, card->object_map, iter) {
- grdrm_connector *connector;
- grdrm_encoder *encoder;
- grdrm_crtc *crtc;
-
- if (object->type != GRDRM_TYPE_CONNECTOR)
- continue;
-
- connector = connector_from_object(object);
- if (connector->kern.connection != 1 || connector->kern.used_encoder < 1)
- continue;
-
- object = grdrm_find_object(card, connector->kern.used_encoder);
- if (!object || object->type != GRDRM_TYPE_ENCODER)
- continue;
-
- encoder = encoder_from_object(object);
- if (encoder->kern.used_crtc < 1)
- continue;
-
- object = grdrm_find_object(card, encoder->kern.used_crtc);
- if (!object || object->type != GRDRM_TYPE_CRTC)
- continue;
-
- crtc = crtc_from_object(object);
- assert(crtc->kern.n_used_connectors < crtc->kern.max_used_connectors);
- crtc->kern.used_connectors[crtc->kern.n_used_connectors++] = connector->object.id;
- }
-
- /* cache old crtc settings for later restore */
- HASHMAP_FOREACH(object, card->object_map, iter) {
- grdrm_crtc *crtc;
-
- if (object->type != GRDRM_TYPE_CRTC)
- continue;
-
- crtc = crtc_from_object(object);
-
- /* Save data if it is the first time we refresh the CRTC. This data can
- * be used optionally to restore any previous configuration. For
- * instance, it allows us to restore VT configurations after we close
- * our session again. */
- if (!crtc->old.set) {
- crtc->old.fb = crtc->kern.used_fb;
- crtc->old.fb_x = crtc->kern.fb_offset_x;
- crtc->old.fb_y = crtc->kern.fb_offset_y;
- crtc->old.gamma = crtc->kern.gamma_size;
- crtc->old.n_connectors = crtc->kern.n_used_connectors;
- if (crtc->old.n_connectors)
- memcpy(crtc->old.connectors, crtc->kern.used_connectors, sizeof(uint32_t) * crtc->old.n_connectors);
- crtc->old.mode_set = crtc->kern.mode_set;
- crtc->old.mode = crtc->kern.mode;
- crtc->old.set = true;
- }
- }
-
- /* everything synced */
- break;
- }
-
- if (tries >= GRDRM_MAX_TRIES) {
- /*
- * Ugh! We were unable to sync the DRM card state due to heavy
- * hotplugging. This should never happen, so print a debug
- * message and bail out. The next uevent will trigger
- * this again.
- */
-
- log_debug("grdrm: %s: hotplug-storm when syncing card", card->base.name);
- return -EFAULT;
- }
-
- return 0;
-}
-
-static bool card_configure_crtc(grdrm_crtc *crtc, grdrm_connector *connector) {
- grdrm_card *card = crtc->object.card;
- grdrm_encoder *encoder;
- grdrm_object *object;
- uint32_t i, j;
-
- if (crtc->object.assigned || connector->object.assigned)
- return false;
- if (connector->kern.connection != 1)
- return false;
-
- for (i = 0; i < connector->kern.n_encoders; ++i) {
- object = grdrm_find_object(card, connector->kern.encoders[i]);
- if (!object || object->type != GRDRM_TYPE_ENCODER)
- continue;
-
- encoder = encoder_from_object(object);
- for (j = 0; j < encoder->kern.n_crtcs; ++j) {
- if (encoder->kern.crtcs[j] == crtc->object.id) {
- grdrm_crtc_assign(crtc, connector);
- return true;
- }
- }
- }
-
- return false;
-}
-
-static void grdrm_card_configure(grdrm_card *card) {
- /*
- * Modeset Configuration
- * This is where we update our modeset configuration and assign
- * connectors to CRTCs. This means, each connector that we want to
- * enable needs a CRTC, disabled (or unavailable) connectors are left
- * alone in the dark. Once all CRTCs are assigned, the remaining CRTCs
- * are disabled.
- * Sounds trivial, but there're several caveats:
- *
- * * Multiple connectors can be driven by the same CRTC. This is
- * known as 'hardware clone mode'. Advantage over software clone
- * mode is that only a single CRTC is needed to drive multiple
- * displays. However, few hardware supports this and it's a huge
- * headache to configure on dynamic demands. Therefore, we only
- * support it if configured statically beforehand.
- *
- * * CRTCs are not created equal. Some might be much more powerful
- * than others, including more advanced plane support. So far, our
- * CRTC selection is random. You need to supply static
- * configuration if you want special setups. So far, there is no
- * proper way to do advanced CRTC selection on dynamic demands. It
- * is not really clear which demands require what CRTC, so, like
- * everyone else, we do random CRTC selection unless explicitly
- * states otherwise.
- *
- * * Each Connector has a list of possible encoders that can drive
- * it, and each encoder has a list of possible CRTCs. If this graph
- * is a tree, assignment is trivial. However, if not, we cannot
- * reliably decide on configurations beforehand. The encoder is
- * always selected by the kernel, so we have to actually set a mode
- * to know which encoder is used. There is no way to ask the kernel
- * whether a given configuration is possible. This will change with
- * atomic-modesetting, but until then, we keep our configurations
- * simple and assume they work all just fine. If one fails
- * unexpectedly, we print a warning and disable it.
- *
- * Configuring a card consists of several steps:
- *
- * 1) First of all, we apply any user-configuration. If a user wants
- * a fixed configuration, we apply it and preserve it.
- * So far, we don't support user configuration files, so this step
- * is skipped.
- *
- * 2) Secondly, we need to apply any quirks from hwdb. Some hardware
- * might only support limited configurations or require special
- * CRTC/Connector mappings. We read this from hwdb and apply it, if
- * present.
- * So far, we don't support this as there is no known quirk, so
- * this step is skipped.
- *
- * 3) As deep modesets are expensive, we try to avoid them if
- * possible. Therefore, we read the current configuration from the
- * kernel and try to preserve it, if compatible with our demands.
- * If not, we break it and reassign it in a following step.
- *
- * 4) The main step involves configuring all remaining objects. By
- * default, all available connectors are enabled, except for those
- * disabled by user-configuration. We lookup a suitable CRTC for
- * each connector and assign them. As there might be more
- * connectors than CRTCs, we apply some ordering so users can
- * select which connectors are more important right now.
- * So far, we only apply the default ordering, more might be added
- * in the future.
- */
-
- grdrm_object *object;
- grdrm_crtc *crtc;
- Iterator i, j;
-
- /* clear assignments */
- HASHMAP_FOREACH(object, card->object_map, i)
- object->assigned = false;
-
- /* preserve existing configurations */
- HASHMAP_FOREACH(object, card->object_map, i) {
- if (object->type != GRDRM_TYPE_CRTC || object->assigned)
- continue;
-
- crtc = crtc_from_object(object);
-
- if (crtc->applied) {
- /* If our mode is set, preserve it. If no connector is
- * set, modeset either failed or the pipe is unused. In
- * both cases, leave it alone. It might be tried again
- * below in case there're remaining connectors.
- * Otherwise, try restoring the assignments. If they
- * are no longer valid, leave the pipe untouched. */
-
- if (crtc->set.n_connectors < 1)
- continue;
-
- assert(crtc->set.n_connectors == 1);
-
- object = grdrm_find_object(card, crtc->set.connectors[0]);
- if (!object || object->type != GRDRM_TYPE_CONNECTOR)
- continue;
-
- card_configure_crtc(crtc, connector_from_object(object));
- } else if (crtc->kern.mode_set && crtc->kern.n_used_connectors != 1) {
- /* If our mode is not set on the pipe, we know the kern
- * information is valid. Try keeping it. If it's not
- * possible, leave the pipe untouched for later
- * assignements. */
-
- object = grdrm_find_object(card, crtc->kern.used_connectors[0]);
- if (!object || object->type != GRDRM_TYPE_CONNECTOR)
- continue;
-
- card_configure_crtc(crtc, connector_from_object(object));
- }
- }
-
- /* assign remaining objects */
- HASHMAP_FOREACH(object, card->object_map, i) {
- if (object->type != GRDRM_TYPE_CRTC || object->assigned)
- continue;
-
- crtc = crtc_from_object(object);
-
- HASHMAP_FOREACH(object, card->object_map, j) {
- if (object->type != GRDRM_TYPE_CONNECTOR)
- continue;
-
- if (card_configure_crtc(crtc, connector_from_object(object)))
- break;
- }
-
- if (!crtc->object.assigned)
- grdrm_crtc_assign(crtc, NULL);
- }
-
- /* expose configuration */
- HASHMAP_FOREACH(object, card->object_map, i) {
- if (object->type != GRDRM_TYPE_CRTC)
- continue;
-
- grdrm_crtc_expose(crtc_from_object(object));
- }
-}
-
-static void grdrm_card_hotplug(grdrm_card *card) {
- int r;
-
- assert(card);
-
- if (!card->running)
- return;
-
- log_debug("grdrm: %s/%s: reconfigure card", card->base.session->name, card->base.name);
-
- card->ready = false;
- r = grdrm_card_resync(card);
- if (r < 0) {
- log_debug_errno(r, "grdrm: %s/%s: cannot re-sync card: %m",
- card->base.session->name, card->base.name);
- return;
- }
-
- grdev_session_pin(card->base.session);
-
- /* debug statement to print card information */
- if (0)
- grdrm_card_print(card);
-
- grdrm_card_configure(card);
- card->ready = true;
- card->hotplug = false;
-
- grdev_session_unpin(card->base.session);
-}
-
-static int grdrm_card_io_fn(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
- grdrm_card *card = userdata;
- struct drm_event_vblank *vblank;
- struct drm_event *event;
- uint32_t id, counter;
- grdrm_object *object;
- char buf[4096];
- size_t len;
- ssize_t l;
-
- if (revents & (EPOLLHUP | EPOLLERR)) {
- /* Immediately close device on HUP; no need to flush pending
- * data.. there're no events we care about here. */
- log_debug("grdrm: %s/%s: HUP", card->base.session->name, card->base.name);
- grdrm_card_close(card);
- return 0;
- }
-
- if (revents & (EPOLLIN)) {
- l = read(card->fd, buf, sizeof(buf));
- if (l < 0) {
- if (errno == EAGAIN || errno == EINTR)
- return 0;
-
- log_debug_errno(errno, "grdrm: %s/%s: read error: %m",
- card->base.session->name, card->base.name);
- grdrm_card_close(card);
- return 0;
- }
-
- for (len = l; len > 0; len -= event->length) {
- event = (void*)buf;
-
- if (len < sizeof(*event) || len < event->length) {
- log_debug("grdrm: %s/%s: truncated event",
- card->base.session->name, card->base.name);
- break;
- }
-
- switch (event->type) {
- case DRM_EVENT_FLIP_COMPLETE:
- vblank = (void*)event;
- if (event->length < sizeof(*vblank)) {
- log_debug("grdrm: %s/%s: truncated vblank event",
- card->base.session->name, card->base.name);
- break;
- }
-
- grdrm_decode_vblank_data(vblank->user_data, &id, &counter);
- object = grdrm_find_object(card, id);
- if (!object || object->type != GRDRM_TYPE_CRTC)
- break;
-
- grdrm_crtc_flip_complete(crtc_from_object(object), counter, vblank);
- break;
- }
- }
- }
-
- return 0;
-}
-
-static int grdrm_card_add(grdrm_card *card, const char *name) {
- assert(card);
- assert(card->fd < 0);
-
- card->object_map = hashmap_new(&trivial_hash_ops);
- if (!card->object_map)
- return -ENOMEM;
-
- return grdev_card_add(&card->base, name);
-}
-
-static void grdrm_card_destroy(grdrm_card *card) {
- assert(card);
- assert(!card->running);
- assert(card->fd < 0);
- assert(hashmap_size(card->object_map) == 0);
-
- hashmap_free(card->object_map);
-}
-
-static void grdrm_card_commit(grdev_card *basecard) {
- grdrm_card *card = grdrm_card_from_base(basecard);
- grdrm_object *object;
- Iterator iter;
-
- HASHMAP_FOREACH(object, card->object_map, iter) {
- if (!card->ready)
- break;
-
- if (object->type != GRDRM_TYPE_CRTC)
- continue;
-
- grdrm_crtc_commit(crtc_from_object(object));
- }
-}
-
-static void grdrm_card_restore(grdev_card *basecard) {
- grdrm_card *card = grdrm_card_from_base(basecard);
- grdrm_object *object;
- Iterator iter;
-
- HASHMAP_FOREACH(object, card->object_map, iter) {
- if (!card->ready)
- break;
-
- if (object->type != GRDRM_TYPE_CRTC)
- continue;
-
- grdrm_crtc_restore(crtc_from_object(object));
- }
-}
-
-static void grdrm_card_enable(grdrm_card *card) {
- assert(card);
-
- if (card->fd < 0 || card->running)
- return;
-
- /* ignore cards without DUMB_BUFFER capability */
- if (!card->cap_dumb)
- return;
-
- assert(card->fd_src);
-
- log_debug("grdrm: %s/%s: enable", card->base.session->name, card->base.name);
-
- card->running = true;
- sd_event_source_set_enabled(card->fd_src, SD_EVENT_ON);
- grdrm_card_hotplug(card);
-}
-
-static void grdrm_card_disable(grdrm_card *card) {
- grdrm_object *object;
- Iterator iter;
-
- assert(card);
-
- if (card->fd < 0 || !card->running)
- return;
-
- assert(card->fd_src);
-
- log_debug("grdrm: %s/%s: disable", card->base.session->name, card->base.name);
-
- card->running = false;
- card->ready = false;
- sd_event_source_set_enabled(card->fd_src, SD_EVENT_OFF);
-
- /* stop all pipes */
- HASHMAP_FOREACH(object, card->object_map, iter) {
- grdrm_crtc *crtc;
-
- if (object->type != GRDRM_TYPE_CRTC)
- continue;
-
- crtc = crtc_from_object(object);
- crtc->applied = false;
- if (crtc->pipe)
- grdev_pipe_ready(&crtc->pipe->base, false);
- }
-}
-
-static int grdrm_card_open(grdrm_card *card, int dev_fd) {
- _cleanup_(grdev_session_unpinp) grdev_session *pin = NULL;
- _cleanup_close_ int fd = dev_fd;
- struct drm_get_cap cap;
- int r, flags;
-
- assert(card);
- assert(dev_fd >= 0);
- assert(card->fd != dev_fd);
-
- pin = grdev_session_pin(card->base.session);
- grdrm_card_close(card);
-
- log_debug("grdrm: %s/%s: open", card->base.session->name, card->base.name);
-
- r = fd_nonblock(fd, true);
- if (r < 0)
- return r;
-
- r = fd_cloexec(fd, true);
- if (r < 0)
- return r;
-
- flags = fcntl(fd, F_GETFL, 0);
- if (flags < 0)
- return -errno;
- if ((flags & O_ACCMODE) != O_RDWR)
- return -EACCES;
-
- r = sd_event_add_io(card->base.session->context->event,
- &card->fd_src,
- fd,
- EPOLLHUP | EPOLLERR | EPOLLIN,
- grdrm_card_io_fn,
- card);
- if (r < 0)
- return r;
-
- sd_event_source_set_enabled(card->fd_src, SD_EVENT_OFF);
-
- card->hotplug = true;
- card->fd = fd;
- fd = -1;
-
- /* cache DUMB_BUFFER capability */
- cap.capability = DRM_CAP_DUMB_BUFFER;
- cap.value = 0;
- r = ioctl(card->fd, DRM_IOCTL_GET_CAP, &cap);
- card->cap_dumb = r >= 0 && cap.value;
- if (r < 0)
- log_debug_errno(r, "grdrm: %s/%s: cannot retrieve DUMB_BUFFER capability: %m",
- card->base.session->name, card->base.name);
- else if (!card->cap_dumb)
- log_debug("grdrm: %s/%s: DUMB_BUFFER capability not supported",
- card->base.session->name, card->base.name);
-
- /* cache TIMESTAMP_MONOTONIC capability */
- cap.capability = DRM_CAP_TIMESTAMP_MONOTONIC;
- cap.value = 0;
- r = ioctl(card->fd, DRM_IOCTL_GET_CAP, &cap);
- card->cap_monotonic = r >= 0 && cap.value;
- if (r < 0)
- log_debug_errno(r, "grdrm: %s/%s: cannot retrieve TIMESTAMP_MONOTONIC capability: %m",
- card->base.session->name, card->base.name);
- else if (!card->cap_monotonic)
- log_debug("grdrm: %s/%s: TIMESTAMP_MONOTONIC is disabled globally, fix this NOW!",
- card->base.session->name, card->base.name);
-
- return 0;
-}
-
-static void grdrm_card_close(grdrm_card *card) {
- grdrm_object *object;
-
- if (card->fd < 0)
- return;
-
- log_debug("grdrm: %s/%s: close", card->base.session->name, card->base.name);
-
- grdrm_card_disable(card);
-
- card->fd_src = sd_event_source_unref(card->fd_src);
- card->fd = safe_close(card->fd);
-
- grdev_session_pin(card->base.session);
- while ((object = hashmap_first(card->object_map)))
- grdrm_object_free(object);
- grdev_session_unpin(card->base.session);
-}
-
-static bool grdrm_card_async(grdrm_card *card, int r) {
- switch (r) {
- case -EACCES:
- /* If we get EACCES on runtime DRM calls, we lost DRM-Master
- * (or we did something terribly wrong). Immediately disable
- * the card, so we stop all pipes and wait to be activated
- * again. */
- grdrm_card_disable(card);
- break;
- case -ENOENT:
- /* DRM objects can be hotplugged at any time. If an object is
- * removed that we use, we remember that state so a following
- * call can test for this.
- * Note that we also get a uevent as followup, this will resync
- * the whole device. */
- card->async_hotplug = true;
- break;
- }
-
- return !card->ready;
-}
-
-/*
- * Unmanaged Cards
- * The unmanaged DRM card opens the device node for a given DRM device
- * directly (/dev/dri/cardX) and thus needs sufficient privileges. It opens
- * the device only if we really require it and releases it as soon as we're
- * disabled or closed.
- * The unmanaged element can be used in all situations where you have direct
- * access to DRM device nodes. Unlike managed DRM elements, it can be used
- * outside of user sessions and in emergency situations where logind is not
- * available.
- */
-
-static void unmanaged_card_enable(grdev_card *basecard) {
- unmanaged_card *cu = unmanaged_card_from_base(basecard);
- int r, fd;
-
- if (cu->card.fd < 0) {
- /* try open on activation if it failed during allocation */
- fd = open(cu->devnode, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
- if (fd < 0) {
- /* not fatal; simply ignore the device */
- log_debug_errno(errno, "grdrm: %s/%s: cannot open node %s: %m",
- basecard->session->name, basecard->name, cu->devnode);
- return;
- }
-
- /* we might already be DRM-Master by open(); that's fine */
-
- r = grdrm_card_open(&cu->card, fd);
- if (r < 0) {
- log_debug_errno(r, "grdrm: %s/%s: cannot open: %m",
- basecard->session->name, basecard->name);
- return;
- }
- }
-
- r = ioctl(cu->card.fd, DRM_IOCTL_SET_MASTER, 0);
- if (r < 0) {
- log_debug_errno(errno, "grdrm: %s/%s: cannot acquire DRM-Master: %m",
- basecard->session->name, basecard->name);
- return;
- }
-
- grdrm_card_enable(&cu->card);
-}
-
-static void unmanaged_card_disable(grdev_card *basecard) {
- unmanaged_card *cu = unmanaged_card_from_base(basecard);
-
- grdrm_card_disable(&cu->card);
-}
-
-static int unmanaged_card_new(grdev_card **out, grdev_session *session, struct udev_device *ud) {
- _cleanup_(grdev_card_freep) grdev_card *basecard = NULL;
- char name[GRDRM_CARD_NAME_MAX];
- unmanaged_card *cu;
- const char *devnode;
- dev_t devnum;
- int r, fd;
-
- assert_return(session, -EINVAL);
- assert_return(ud, -EINVAL);
-
- devnode = udev_device_get_devnode(ud);
- devnum = udev_device_get_devnum(ud);
- if (!devnode || devnum == 0)
- return -ENODEV;
-
- grdrm_name(name, devnum);
-
- cu = new0(unmanaged_card, 1);
- if (!cu)
- return -ENOMEM;
-
- basecard = &cu->card.base;
- cu->card = GRDRM_CARD_INIT(&unmanaged_card_vtable, session);
-
- cu->devnode = strdup(devnode);
- if (!cu->devnode)
- return -ENOMEM;
-
- r = grdrm_card_add(&cu->card, name);
- if (r < 0)
- return r;
-
- /* try to open but ignore errors */
- fd = open(cu->devnode, O_RDWR | O_CLOEXEC | O_NOCTTY | O_NONBLOCK);
- if (fd < 0) {
- /* not fatal; allow uaccess based control on activation */
- log_debug_errno(errno, "grdrm: %s/%s: cannot open node %s: %m",
- basecard->session->name, basecard->name, cu->devnode);
- } else {
- /* We might get DRM-Master implicitly on open(); drop it immediately
- * so we acquire it only once we're actually enabled. We don't
- * really care whether this call fails or not, but lets log any
- * weird errors, anyway. */
- r = ioctl(fd, DRM_IOCTL_DROP_MASTER, 0);
- if (r < 0 && errno != EACCES && errno != EINVAL)
- log_debug_errno(errno, "grdrm: %s/%s: cannot drop DRM-Master: %m",
- basecard->session->name, basecard->name);
-
- r = grdrm_card_open(&cu->card, fd);
- if (r < 0)
- log_debug_errno(r, "grdrm: %s/%s: cannot open: %m",
- basecard->session->name, basecard->name);
- }
-
- if (out)
- *out = basecard;
- basecard = NULL;
- return 0;
-}
-
-static void unmanaged_card_free(grdev_card *basecard) {
- unmanaged_card *cu = unmanaged_card_from_base(basecard);
-
- assert(!basecard->enabled);
-
- grdrm_card_close(&cu->card);
- grdrm_card_destroy(&cu->card);
- free(cu->devnode);
- free(cu);
-}
-
-static const grdev_card_vtable unmanaged_card_vtable = {
- .free = unmanaged_card_free,
- .enable = unmanaged_card_enable,
- .disable = unmanaged_card_disable,
- .commit = grdrm_card_commit,
- .restore = grdrm_card_restore,
-};
-
-/*
- * Managed Cards
- * The managed DRM card uses systemd-logind to acquire DRM devices. This
- * means, we do not open the device node /dev/dri/cardX directly. Instead,
- * logind passes us a file-descriptor whenever our session is activated. Thus,
- * we don't need access to the device node directly.
- * Furthermore, whenever the session is put asleep, logind revokes the
- * file-descriptor so we loose access to the device.
- * Managed DRM cards should be preferred over unmanaged DRM cards whenever
- * you run inside a user session with exclusive device access.
- */
-
-static void managed_card_enable(grdev_card *card) {
- managed_card *cm = managed_card_from_base(card);
-
- /* If the device is manually re-enabled, we try to resume our card
- * management. Note that we have no control over DRM-Master and the fd,
- * so we have to take over the state from the last logind event. */
-
- if (cm->master)
- grdrm_card_enable(&cm->card);
-}
-
-static void managed_card_disable(grdev_card *card) {
- managed_card *cm = managed_card_from_base(card);
-
- /* If the device is manually disabled, we keep the FD but put our card
- * management asleep. This way, we can wake up at any time, but don't
- * touch the device while asleep. */
-
- grdrm_card_disable(&cm->card);
-}
-
-static int managed_card_pause_device_fn(sd_bus *bus,
- sd_bus_message *signal,
- void *userdata,
- sd_bus_error *ret_error) {
- managed_card *cm = userdata;
- grdev_session *session = cm->card.base.session;
- uint32_t major, minor;
- const char *mode;
- int r;
-
- /*
- * We get PauseDevice() signals from logind whenever a device we
- * requested was, or is about to be, paused. Arguments are major/minor
- * number of the device and the mode of the operation.
- * In case the event is not about our device, we ignore it. Otherwise,
- * we treat it as asynchronous DRM-DROP-MASTER. Note that we might have
- * already handled an EACCES error from a modeset ioctl, in which case
- * we already disabled the device.
- *
- * @mode can be one of the following:
- * "pause": The device is about to be paused. We must react
- * immediately and respond with PauseDeviceComplete(). Once
- * we replied, logind will pause the device. Note that
- * logind might apply any kind of timeout and force pause
- * the device if we don't respond in a timely manner. In
- * this case, we will receive a second PauseDevice event
- * with @mode set to "force" (or similar).
- * "force": The device was disabled forecfully by logind. DRM-Master
- * was already dropped. This is just an asynchronous
- * notification so we can put the device asleep (in case
- * we didn't already notice the dropped DRM-Master).
- * "gone": This is like "force" but is sent if the device was
- * paused due to a device-removal event.
- *
- * We always handle PauseDevice signals as "force" as we properly
- * support asynchronously dropping DRM-Master, anyway. But in case
- * logind sent mode "pause", we also call PauseDeviceComplete() to
- * immediately acknowledge the request.
- */
-
- r = sd_bus_message_read(signal, "uus", &major, &minor, &mode);
- if (r < 0) {
- log_debug("grdrm: %s/%s: erroneous PauseDevice signal",
- session->name, cm->card.base.name);
- return 0;
- }
-
- /* not our device? */
- if (makedev(major, minor) != cm->devnum)
- return 0;
-
- cm->master = false;
- grdrm_card_disable(&cm->card);
-
- if (streq(mode, "pause")) {
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
-
- /*
- * Sending PauseDeviceComplete() is racy if logind triggers the
- * timeout. That is, if we take too long and logind pauses the
- * device by sending a forced PauseDevice, our
- * PauseDeviceComplete call will be stray. That's fine, though.
- * logind ignores such stray calls. Only if logind also sent a
- * further PauseDevice() signal, it might match our call
- * incorrectly to the newer PauseDevice(). That's fine, too, as
- * we handle that event asynchronously, anyway. Therefore,
- * whatever happens, we're fine. Yay!
- */
-
- r = sd_bus_message_new_method_call(session->context->sysbus,
- &m,
- "org.freedesktop.login1",
- session->path,
- "org.freedesktop.login1.Session",
- "PauseDeviceComplete");
- if (r >= 0) {
- r = sd_bus_message_append(m, "uu", major, minor);
- if (r >= 0)
- r = sd_bus_send(session->context->sysbus, m, NULL);
- }
-
- if (r < 0)
- log_debug_errno(r, "grdrm: %s/%s: cannot send PauseDeviceComplete: %m",
- session->name, cm->card.base.name);
- }
-
- return 0;
-}
-
-static int managed_card_resume_device_fn(sd_bus *bus,
- sd_bus_message *signal,
- void *userdata,
- sd_bus_error *ret_error) {
- managed_card *cm = userdata;
- grdev_session *session = cm->card.base.session;
- uint32_t major, minor;
- int r, fd;
-
- /*
- * We get ResumeDevice signals whenever logind resumed a previously
- * paused device. The arguments contain the major/minor number of the
- * related device and a new file-descriptor for the freshly opened
- * device-node.
- * If the signal is not about our device, we simply ignore it.
- * Otherwise, we immediately resume the device. Note that we drop the
- * new file-descriptor as we already have one from TakeDevice(). logind
- * preserves the file-context across pause/resume for DRM but only
- * drops/acquires DRM-Master accordingly. This way, our context (like
- * DRM-FBs and BOs) is preserved.
- */
-
- r = sd_bus_message_read(signal, "uuh", &major, &minor, &fd);
- if (r < 0) {
- log_debug("grdrm: %s/%s: erroneous ResumeDevice signal",
- session->name, cm->card.base.name);
- return 0;
- }
-
- /* not our device? */
- if (makedev(major, minor) != cm->devnum)
- return 0;
-
- if (cm->card.fd < 0) {
- /* This shouldn't happen. We should already own an FD from
- * TakeDevice(). However, lets be safe and use this FD in case
- * we really don't have one. There is no harm in doing this
- * and our code works fine this way. */
- fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
- if (fd < 0) {
- log_debug_errno(errno, "grdrm: %s/%s: cannot duplicate fd: %m",
- session->name, cm->card.base.name);
- return 0;
- }
-
- r = grdrm_card_open(&cm->card, fd);
- if (r < 0) {
- log_debug_errno(r, "grdrm: %s/%s: cannot open: %m",
- session->name, cm->card.base.name);
- return 0;
- }
- }
-
- cm->master = true;
- if (cm->card.base.enabled)
- grdrm_card_enable(&cm->card);
-
- return 0;
-}
-
-static int managed_card_setup_bus(managed_card *cm) {
- grdev_session *session = cm->card.base.session;
- _cleanup_free_ char *match = NULL;
- int r;
-
- match = strjoin("type='signal',"
- "sender='org.freedesktop.login1',"
- "interface='org.freedesktop.login1.Session',"
- "member='PauseDevice',"
- "path='", session->path, "'",
- NULL);
- if (!match)
- return -ENOMEM;
-
- r = sd_bus_add_match(session->context->sysbus,
- &cm->slot_pause_device,
- match,
- managed_card_pause_device_fn,
- cm);
- if (r < 0)
- return r;
-
- free(match);
- match = strjoin("type='signal',"
- "sender='org.freedesktop.login1',"
- "interface='org.freedesktop.login1.Session',"
- "member='ResumeDevice',"
- "path='", session->path, "'",
- NULL);
- if (!match)
- return -ENOMEM;
-
- r = sd_bus_add_match(session->context->sysbus,
- &cm->slot_resume_device,
- match,
- managed_card_resume_device_fn,
- cm);
- if (r < 0)
- return r;
-
- return 0;
-}
-
-static int managed_card_take_device_fn(sd_bus *bus,
- sd_bus_message *reply,
- void *userdata,
- sd_bus_error *ret_error) {
- managed_card *cm = userdata;
- grdev_session *session = cm->card.base.session;
- int r, paused, fd;
-
- cm->slot_take_device = sd_bus_slot_unref(cm->slot_take_device);
-
- if (sd_bus_message_is_method_error(reply, NULL)) {
- const sd_bus_error *error = sd_bus_message_get_error(reply);
-
- log_debug("grdrm: %s/%s: TakeDevice failed: %s: %s",
- session->name, cm->card.base.name, error->name, error->message);
- return 0;
- }
-
- cm->acquired = true;
-
- r = sd_bus_message_read(reply, "hb", &fd, &paused);
- if (r < 0) {
- log_debug("grdrm: %s/%s: erroneous TakeDevice reply",
- session->name, cm->card.base.name);
- return 0;
- }
-
- fd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
- if (fd < 0) {
- log_debug_errno(errno, "grdrm: %s/%s: cannot duplicate fd: %m",
- session->name, cm->card.base.name);
- return 0;
- }
-
- r = grdrm_card_open(&cm->card, fd);
- if (r < 0) {
- log_debug_errno(r, "grdrm: %s/%s: cannot open: %m",
- session->name, cm->card.base.name);
- return 0;
- }
-
- if (!paused && cm->card.base.enabled)
- grdrm_card_enable(&cm->card);
-
- return 0;
-}
-
-static void managed_card_take_device(managed_card *cm) {
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
- grdev_session *session = cm->card.base.session;
- int r;
-
- r = sd_bus_message_new_method_call(session->context->sysbus,
- &m,
- "org.freedesktop.login1",
- session->path,
- "org.freedesktop.login1.Session",
- "TakeDevice");
- if (r < 0)
- goto error;
-
- r = sd_bus_message_append(m, "uu", major(cm->devnum), minor(cm->devnum));
- if (r < 0)
- goto error;
-
- r = sd_bus_call_async(session->context->sysbus,
- &cm->slot_take_device,
- m,
- managed_card_take_device_fn,
- cm,
- 0);
- if (r < 0)
- goto error;
-
- cm->requested = true;
- return;
-
-error:
- log_debug_errno(r, "grdrm: %s/%s: cannot send TakeDevice request: %m",
- session->name, cm->card.base.name);
-}
-
-static void managed_card_release_device(managed_card *cm) {
- _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
- grdev_session *session = cm->card.base.session;
- int r;
-
- /*
- * If TakeDevice() is pending or was successful, make sure to
- * release the device again. We don't care for return-values,
- * so send it without waiting or callbacks.
- * If a failed TakeDevice() is pending, but someone else took
- * the device on the same bus-connection, we might incorrectly
- * release their device. This is an unlikely race, though.
- * Furthermore, you really shouldn't have two users of the
- * controller-API on the same session, on the same devices, *AND* on
- * the same bus-connection. So we don't care for that race..
- */
-
- grdrm_card_close(&cm->card);
- cm->requested = false;
-
- if (!cm->acquired && !cm->slot_take_device)
- return;
-
- cm->slot_take_device = sd_bus_slot_unref(cm->slot_take_device);
- cm->acquired = false;
-
- r = sd_bus_message_new_method_call(session->context->sysbus,
- &m,
- "org.freedesktop.login1",
- session->path,
- "org.freedesktop.login1.Session",
- "ReleaseDevice");
- if (r >= 0) {
- r = sd_bus_message_append(m, "uu", major(cm->devnum), minor(cm->devnum));
- if (r >= 0)
- r = sd_bus_send(session->context->sysbus, m, NULL);
- }
-
- if (r < 0 && r != -ENOTCONN)
- log_debug_errno(r, "grdrm: %s/%s: cannot send ReleaseDevice: %m",
- session->name, cm->card.base.name);
-}
-
-static int managed_card_new(grdev_card **out, grdev_session *session, struct udev_device *ud) {
- _cleanup_(grdev_card_freep) grdev_card *basecard = NULL;
- char name[GRDRM_CARD_NAME_MAX];
- managed_card *cm;
- dev_t devnum;
- int r;
-
- assert_return(session, -EINVAL);
- assert_return(session->managed, -EINVAL);
- assert_return(session->context->sysbus, -EINVAL);
- assert_return(ud, -EINVAL);
-
- devnum = udev_device_get_devnum(ud);
- if (devnum == 0)
- return -ENODEV;
-
- grdrm_name(name, devnum);
-
- cm = new0(managed_card, 1);
- if (!cm)
- return -ENOMEM;
-
- basecard = &cm->card.base;
- cm->card = GRDRM_CARD_INIT(&managed_card_vtable, session);
- cm->devnum = devnum;
-
- r = managed_card_setup_bus(cm);
- if (r < 0)
- return r;
-
- r = grdrm_card_add(&cm->card, name);
- if (r < 0)
- return r;
-
- managed_card_take_device(cm);
-
- if (out)
- *out = basecard;
- basecard = NULL;
- return 0;
-}
-
-static void managed_card_free(grdev_card *basecard) {
- managed_card *cm = managed_card_from_base(basecard);
-
- assert(!basecard->enabled);
-
- managed_card_release_device(cm);
- cm->slot_resume_device = sd_bus_slot_unref(cm->slot_resume_device);
- cm->slot_pause_device = sd_bus_slot_unref(cm->slot_pause_device);
- grdrm_card_destroy(&cm->card);
- free(cm);
-}
-
-static const grdev_card_vtable managed_card_vtable = {
- .free = managed_card_free,
- .enable = managed_card_enable,
- .disable = managed_card_disable,
- .commit = grdrm_card_commit,
- .restore = grdrm_card_restore,
-};
-
-/*
- * Generic Constructor
- * Instead of relying on the caller to choose between managed and unmanaged
- * DRM devices, the grdev_drm_new() constructor does that for you (by
- * looking at session->managed).
- */
-
-bool grdev_is_drm_card(grdev_card *basecard) {
- return basecard && (basecard->vtable == &unmanaged_card_vtable ||
- basecard->vtable == &managed_card_vtable);
-}
-
-grdev_card *grdev_find_drm_card(grdev_session *session, dev_t devnum) {
- char name[GRDRM_CARD_NAME_MAX];
-
- assert_return(session, NULL);
- assert_return(devnum != 0, NULL);
-
- grdrm_name(name, devnum);
- return grdev_find_card(session, name);
-}
-
-int grdev_drm_card_new(grdev_card **out, grdev_session *session, struct udev_device *ud) {
- assert_return(session, -EINVAL);
- assert_return(ud, -EINVAL);
-
- return session->managed ? managed_card_new(out, session, ud) : unmanaged_card_new(out, session, ud);
-}
-
-void grdev_drm_card_hotplug(grdev_card *basecard, struct udev_device *ud) {
- const char *p, *action;
- grdrm_card *card;
- dev_t devnum;
-
- assert(basecard);
- assert(grdev_is_drm_card(basecard));
- assert(ud);
-
- card = grdrm_card_from_base(basecard);
-
- action = udev_device_get_action(ud);
- if (!action || streq(action, "add") || streq(action, "remove")) {
- /* If we get add/remove events on DRM nodes without devnum, we
- * got hotplugged DRM objects so refresh the device. */
- devnum = udev_device_get_devnum(ud);
- if (devnum == 0) {
- card->hotplug = true;
- grdrm_card_hotplug(card);
- }
- } else if (streq_ptr(action, "change")) {
- /* A change event with HOTPLUG=1 is sent whenever a connector
- * changed state. Refresh the device to update our state. */
- p = udev_device_get_property_value(ud, "HOTPLUG");
- if (streq_ptr(p, "1")) {
- card->hotplug = true;
- grdrm_card_hotplug(card);
- }
- }
-}
~ianmdlvl / elogind.git / blobdiff