diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c index 6f64aab18..bdae54c46 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c @@ -38,6 +38,8 @@ #include "dc/dc_dmub_srv.h" #include "dce/dmub_replay.h" #include "abm.h" +#define DC_LOGGER \ + link->ctx->logger #define DC_LOGGER_INIT(logger) #define DP_SINK_PR_ENABLE_AND_CONFIGURATION 0x37B @@ -179,7 +181,7 @@ bool edp_set_backlight_level_nits(struct dc_link *link, &backlight_control, 1) != DC_OK) return false; } else { - const uint8_t backlight_enable = DP_EDP_PANEL_LUMINANCE_CONTROL_ENABLE; + uint8_t backlight_enable = 0; struct target_luminance_value *target_luminance = NULL; //if target luminance value is greater than 24 bits, clip the value to 24 bits @@ -188,6 +190,11 @@ bool edp_set_backlight_level_nits(struct dc_link *link, target_luminance = (struct target_luminance_value *)&backlight_millinits; + core_link_read_dpcd(link, DP_EDP_BACKLIGHT_MODE_SET_REGISTER, + &backlight_enable, sizeof(uint8_t)); + + backlight_enable |= DP_EDP_PANEL_LUMINANCE_CONTROL_ENABLE; + if (core_link_write_dpcd(link, DP_EDP_BACKLIGHT_MODE_SET_REGISTER, &backlight_enable, sizeof(backlight_enable)) != DC_OK) |