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drm/dp: Enable backlight control using luminance

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Add flag to enable brightness control via luminance value
when enabling edp backlight.

Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Reviewed-by: Arun R Murthy <arun.r.murthy@intel.com>
Link: https://lore.kernel.org/r/20250620063445.3603086-11-suraj.kandpal@intel.com
This commit is contained in:
Suraj Kandpal
2025-06-20 12:04:42 +05:30
parent 05a76aef23
commit ba02bf8e86
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/display/drm_dp_helper.c
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@@ -4038,6 +4038,9 @@ int drm_edp_backlight_enable(struct drm_dp_aux *aux, const struct drm_edp_backli
else
dpcd_buf = DP_EDP_BACKLIGHT_CONTROL_MODE_PWM;
if (bl->luminance_set)
dpcd_buf |= DP_EDP_PANEL_LUMINANCE_CONTROL_ENABLE;
if (bl->pwmgen_bit_count) {
ret = drm_dp_dpcd_write_byte(aux, DP_EDP_PWMGEN_BIT_COUNT, bl->pwmgen_bit_count);
if (ret < 0)