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d36dd96e8d
Since 1d581656c7 ("backend/drm: set "max bpc" to the max") we
set the "max bpc" property to the maximum value. The kernel driver
is supposed to clamp this value depending on hardware capabilities.
All kernel drivers lower the value depending on the GPU capabilities.
However, none of the drivers lower the value depending on the DP-MST
link capabilities. Thus, enabling a 4k@60Hz mode can fail on some
DP-MST setups due to the "max bpc" property.
Additionally, it's not a good idea to unconditionally set "max bpc"
to the max. A high bpc consumes more lanes and more clock speed,
which means higher power consumption and the busy lanes cannot be
used for something else (e.g. other data transfers on a USB-C cable).
For now, let's tie the "max bpc" to the pixel format of the buffer.
Introduce a heuristic to make "high bit-depth buffer" a synonym of
"I want the best quality".
This is not perfect: a "max bpc" higher than 8 might be desirable
for pixel formats with a color depth of 8 bits, for instance when
the color management KMS properties are used. But we don't really
support that yet, so let's leave this for later.
Closes: https://github.com/swaywm/sway/issues/7367
162 lines
4.2 KiB
C
162 lines
4.2 KiB
C
#ifndef BACKEND_DRM_DRM_H
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#define BACKEND_DRM_DRM_H
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <time.h>
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#include <wayland-server-core.h>
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#include <wayland-util.h>
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#include <wlr/backend/drm.h>
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#include <wlr/backend/session.h>
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#include <wlr/render/drm_format_set.h>
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#include <xf86drmMode.h>
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#include "backend/drm/iface.h"
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#include "backend/drm/properties.h"
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#include "backend/drm/renderer.h"
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struct wlr_drm_plane {
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uint32_t type;
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uint32_t id;
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/* Only initialized on multi-GPU setups */
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struct wlr_drm_surface mgpu_surf;
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/* Buffer submitted to the kernel, will be presented on next vblank */
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struct wlr_drm_fb *queued_fb;
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/* Buffer currently displayed on screen */
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struct wlr_drm_fb *current_fb;
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struct wlr_drm_format_set formats;
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union wlr_drm_plane_props props;
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};
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struct wlr_drm_crtc {
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uint32_t id;
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struct wlr_drm_lease *lease;
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// Atomic modesetting only
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uint32_t mode_id;
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uint32_t gamma_lut;
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// Legacy only
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int legacy_gamma_size;
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struct wlr_drm_plane *primary;
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struct wlr_drm_plane *cursor;
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union wlr_drm_crtc_props props;
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};
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struct wlr_drm_backend {
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struct wlr_backend backend;
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struct wlr_drm_backend *parent;
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const struct wlr_drm_interface *iface;
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clockid_t clock;
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bool addfb2_modifiers;
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int fd;
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char *name;
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struct wlr_device *dev;
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size_t num_crtcs;
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struct wlr_drm_crtc *crtcs;
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struct wl_display *display;
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struct wl_event_source *drm_event;
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struct wl_listener display_destroy;
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struct wl_listener session_destroy;
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struct wl_listener session_active;
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struct wl_listener parent_destroy;
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struct wl_listener dev_change;
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struct wl_listener dev_remove;
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struct wl_list fbs; // wlr_drm_fb.link
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struct wl_list connectors; // wlr_drm_connector.link
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/* Only initialized on multi-GPU setups */
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struct wlr_drm_renderer mgpu_renderer;
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struct wlr_session *session;
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uint64_t cursor_width, cursor_height;
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struct wlr_drm_format_set mgpu_formats;
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};
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struct wlr_drm_mode {
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struct wlr_output_mode wlr_mode;
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drmModeModeInfo drm_mode;
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};
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struct wlr_drm_connector_state {
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const struct wlr_output_state *base;
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bool modeset;
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bool active;
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drmModeModeInfo mode;
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struct wlr_drm_fb *primary_fb;
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};
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struct wlr_drm_connector {
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struct wlr_output output; // only valid if status != DISCONNECTED
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struct wlr_drm_backend *backend;
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char name[24];
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drmModeConnection status;
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uint32_t id;
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uint64_t max_bpc_bounds[2];
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struct wlr_drm_lease *lease;
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struct wlr_drm_crtc *crtc;
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uint32_t possible_crtcs;
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union wlr_drm_connector_props props;
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bool cursor_enabled;
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int cursor_x, cursor_y;
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int cursor_width, cursor_height;
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int cursor_hotspot_x, cursor_hotspot_y;
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/* Buffer to be submitted to the kernel on the next page-flip */
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struct wlr_drm_fb *cursor_pending_fb;
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struct wl_list link; // wlr_drm_backend.connectors
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/* CRTC ID if a page-flip is pending, zero otherwise.
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*
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* We've asked for a state change in the kernel, and yet to receive a
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* notification for its completion. Currently, the kernel only has a
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* queue length of 1, and no way to modify your submissions after
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* they're sent.
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*/
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uint32_t pending_page_flip_crtc;
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};
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struct wlr_drm_backend *get_drm_backend_from_backend(
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struct wlr_backend *wlr_backend);
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bool check_drm_features(struct wlr_drm_backend *drm);
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bool init_drm_resources(struct wlr_drm_backend *drm);
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void finish_drm_resources(struct wlr_drm_backend *drm);
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void scan_drm_connectors(struct wlr_drm_backend *state,
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struct wlr_device_hotplug_event *event);
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void scan_drm_leases(struct wlr_drm_backend *drm);
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int handle_drm_event(int fd, uint32_t mask, void *data);
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void destroy_drm_connector(struct wlr_drm_connector *conn);
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bool drm_connector_commit_state(struct wlr_drm_connector *conn,
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const struct wlr_output_state *state);
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bool drm_connector_is_cursor_visible(struct wlr_drm_connector *conn);
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bool drm_connector_supports_vrr(struct wlr_drm_connector *conn);
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size_t drm_crtc_get_gamma_lut_size(struct wlr_drm_backend *drm,
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struct wlr_drm_crtc *crtc);
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void drm_lease_destroy(struct wlr_drm_lease *lease);
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struct wlr_drm_fb *get_next_cursor_fb(struct wlr_drm_connector *conn);
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#define wlr_drm_conn_log(conn, verb, fmt, ...) \
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wlr_log(verb, "connector %s: " fmt, conn->name, ##__VA_ARGS__)
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#define wlr_drm_conn_log_errno(conn, verb, fmt, ...) \
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wlr_log_errno(verb, "connector %s: " fmt, conn->name, ##__VA_ARGS__)
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#endif
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