Simon Ser 821fb28266 backend/drm: set "max bpc" property based on pixel format ... 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 (cherry picked from commit d36dd96e8d)		2023-01-31 17:16:59 +01:00
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drm	backend/drm: set "max bpc" property based on pixel format	2023-01-31 17:16:59 +01:00
headless	backend: use global output name counters	2022-10-13 13:12:43 +02:00
libinput	backend/libinput: Fix SIGSEGV found in low-memory fuzzing	2022-09-22 13:37:32 -04:00
multi	Use wl_signal_emit_mutable	2022-08-18 07:16:16 -04:00
session	Use wl_signal_emit_mutable	2022-08-18 07:16:16 -04:00
wayland	backend/wayland: ensure buffers are released on shutdown	2022-12-07 15:11:35 +01:00
x11	backend/x11: fix delta_discrete value	2023-01-16 14:21:15 +03:00
backend.c	backend: error out when missing DRM and libinput in wlr_backend_autocreate()	2022-12-07 15:06:29 +01:00
meson.build	backend: remove noop backend	2021-11-25 16:49:05 +00:00