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drm: panel-backlight-quirks: Convert brightness quirk to generic structure

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Currently, the brightness quirk is limited to minimum brightness only.
Refactor it to a structure, so that more quirks can be added in the
future. Reserve 0 value for "no quirk", and use u16 to allow minimum
brightness up to 255.

Tested-by: Philip Müller <philm@manjaro.org>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Antheas Kapenekakis <lkml@antheas.dev>
Link: https://lore.kernel.org/r/20250829145541.512671-3-lkml@antheas.dev
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
This commit is contained in:
Antheas Kapenekakis
2025-08-29 16:55:37 +02:00
committed by Mario Limonciello (AMD)
parent 9931e4be11
commit 6eee1ef9e5
3 changed files with 35 additions and 25 deletions
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12
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@@ -3612,11 +3612,11 @@ static struct drm_mode_config_helper_funcs amdgpu_dm_mode_config_helperfuncs = {
static void update_connector_ext_caps(struct amdgpu_dm_connector *aconnector)
{
const struct drm_panel_backlight_quirk *panel_backlight_quirk;
struct amdgpu_dm_backlight_caps *caps;
struct drm_connector *conn_base;
struct amdgpu_device *adev;
struct drm_luminance_range_info *luminance_range;
int min_input_signal_override;
if (aconnector->bl_idx == -1 ||
aconnector->dc_link->connector_signal != SIGNAL_TYPE_EDP)
@@ -3656,9 +3656,13 @@ static void update_connector_ext_caps(struct amdgpu_dm_connector *aconnector)
else
caps->aux_min_input_signal = 1;
min_input_signal_override = drm_get_panel_min_brightness_quirk(aconnector->drm_edid);
if (min_input_signal_override >= 0)
caps->min_input_signal = min_input_signal_override;
panel_backlight_quirk =
drm_get_panel_backlight_quirk(aconnector->drm_edid);
if (!IS_ERR_OR_NULL(panel_backlight_quirk)) {
if (panel_backlight_quirk->min_brightness)
caps->min_input_signal =
panel_backlight_quirk->min_brightness - 1;
}
}
DEFINE_FREE(sink_release, struct dc_sink *, if (_T) dc_sink_release(_T))