diff mbox series

[10/13] drm/dp: Enable backlight control using luminance

Message ID 20250411042909.2626807-11-suraj.kandpal@intel.com (mailing list archive)
State New
Headers show
Series Modify drm helpers to use luminance | expand

Commit Message

Kandpal, Suraj April 11, 2025, 4:29 a.m. UTC 
Add flag to enable brightness control via luminance value
when enabling edp backlight.

Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
---
 drivers/gpu/drm/display/drm_dp_helper.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/display/drm_dp_helper.c b/drivers/gpu/drm/display/drm_dp_helper.c
index 0a2ec1147006..b204ed48976d 100644
--- a/drivers/gpu/drm/display/drm_dp_helper.c
+++ b/drivers/gpu/drm/display/drm_dp_helper.c
@@ -4030,6 +4030,9 @@  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)