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| author | Suraj Kandpal <suraj.kandpal@intel.com> | 2026-03-16 08:48:51 +0530 |
|---|---|---|
| committer | Suraj Kandpal <suraj.kandpal@intel.com> | 2026-03-18 08:00:30 +0530 |
| commit | 0fb03890d18205ec0909fc47049eceae8ba36457 (patch) | |
| tree | 663a78f550e4b0ee08953de4044635baced9235c /tools/perf/scripts/python/bin/stackcollapse-record | |
| parent | 3ccc8a922906703cd0efdf1bdd6186f18f7e23ec (diff) | |
drm/i915/backlight: Check if VESA backlight is possible
Check if BACKLIGHT_BRIGHTNESS_AUX_SET_CAPABLE bit is
set then EDP_PWMGEN_BIT_COUNT_CAP_MIN and EDP_PWMGEN_BIT_COUNT_CAP_MAX
follow the eDP 1.4b Section 10.3. Which states min should
be >= 1 and max should be >= min. Some legacy panels
do not follow this properly. They set the
BACKLIGHT_BRIGHTNESS_AUX_SET_CAPABLE bit while not correctly
populating the min and max fields leading to a 0 max value.
Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/7514
Fixes: 40d2f5820951 ("drm/i915/backlight: Remove try_vesa_interface")
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Pranay Samala <pranay.samala@intel.com>
Link: https://patch.msgid.link/20260316031850.81794-1-suraj.kandpal@intel.com
Diffstat (limited to 'tools/perf/scripts/python/bin/stackcollapse-record')
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