Limit minimum brightness to 20 when using aux based brightness
control to avoid letting the screen going completely blank.
Signed-off-by: Suraj Kandpal <suraj.kandpal@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
index 20dd5a6a0f3f..b54ea7e46954 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_aux_backlight.c
@@ -211,6 +211,9 @@ intel_dp_aux_hdr_set_aux_backlight(const struct drm_connector_state *conn_state,
struct intel_dp *intel_dp = enc_to_intel_dp(connector->encoder);
u8 buf[4] = {};
+ if (level < 20)
+ level = 20;
+
buf[0] = level & 0xFF;
buf[1] = (level & 0xFF00) >> 8;
--
2.43.2
