WSL2-Linux-Kernel/drivers/gpu
José Roberto de Souza 7ff346ee01 drm/i915/display: Fix HPD short pulse handling for eDP
[ Upstream commit 3a84fd1ed5 ]

Commit 13ea6db2cf ("drm/i915/edp: Ignore short pulse when panel
powered off") completely broke short pulse handling for eDP as it is
usually generated by sink when it is displaying image and there is
some error or status that source needs to handle.

When power panel is enabled, this state is enough to power aux
transactions and VDD override is disabled, so intel_pps_have_power()
is always returning false causing short pulses to be ignored.

So here better naming this function that intends to check if aux
lines are powered to avoid the endless cycle mentioned in the commit
being fixed and fixing the check for what it is intended.

v2:
- renamed to intel_pps_have_panel_power_or_vdd()
- fixed indentation

Fixes: 13ea6db2cf ("drm/i915/edp: Ignore short pulse when panel powered off")
Cc: Anshuman Gupta <anshuman.gupta@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Uma Shankar <uma.shankar@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220311185149.110527-1-jose.souza@intel.com
(cherry picked from commit 8f0c1c0949)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-04-08 14:23:40 +02:00
..
drm drm/i915/display: Fix HPD short pulse handling for eDP 2022-04-08 14:23:40 +02:00
host1x gpu: host1x: Fix a memory leak in 'host1x_remove()' 2022-04-08 14:23:36 +02:00
ipu-v3 Updates to the interrupt core and driver subsystems: 2021-08-30 14:38:37 -07:00
trace
vga vgaarb: don't pass a cookie to vga_client_register 2021-07-21 10:29:10 +02:00
Makefile