drm/amd/display: Skip backlight control delay on external powered links

[Why]
When an eDP panel is powered externally from a different GPU, we can avoid
waiting for hardware sequencing delays when switching the backlight on/off
as the display backlight is no longer powered by the original source.

[How]
This commit extends the 'link_powered_externally' variable to allow
bypassing hardware delays for additional backlight commands and force the
backlight on/off when a link is powered by another GPU.

Tested-by: Daniel Wheeler <Daniel.Wheeler@amd.com>
Reviewed-by: Felipe Clark <felipe.clark@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Tony Tascioglu <tony.tascioglu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

3 files changed, 9 insertions, 9 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c b/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
index 9f11dcf67c28..2c278b626256 100644
--- a/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
+++ b/drivers/gpu/drm/amd/display/dc/bios/bios_parser2.c
@@ -1698,14 +1698,14 @@ static enum bp_result bios_parser_enable_lvtma_control(
 	struct dc_bios *dcb,
 	uint8_t uc_pwr_on,
 	uint8_t panel_instance,
-	uint8_t bypass_powerdown_wait)
+	uint8_t bypass_panel_control_wait)
 {
 	struct bios_parser *bp = BP_FROM_DCB(dcb);
 
 	if (!bp->cmd_tbl.enable_lvtma_control)
 		return BP_RESULT_FAILURE;
 
-	return bp->cmd_tbl.enable_lvtma_control(bp, uc_pwr_on, panel_instance, bypass_powerdown_wait);
+	return bp->cmd_tbl.enable_lvtma_control(bp, uc_pwr_on, panel_instance, bypass_panel_control_wait);
 }
 
 static bool bios_parser_is_accelerated_mode(
diff --git a/drivers/gpu/drm/amd/display/dc/bios/command_table2.c b/drivers/gpu/drm/amd/display/dc/bios/command_table2.c
index 91adebc5c5b7..1ef9e4053bb7 100644
--- a/drivers/gpu/drm/amd/display/dc/bios/command_table2.c
+++ b/drivers/gpu/drm/amd/display/dc/bios/command_table2.c
@@ -987,7 +987,7 @@ static enum bp_result enable_lvtma_control(
 	struct bios_parser *bp,
 	uint8_t uc_pwr_on,
 	uint8_t panel_instance,
-	uint8_t bypass_powerdown_wait);
+	uint8_t bypass_panel_control_wait);
 
 static void init_enable_lvtma_control(struct bios_parser *bp)
 {
@@ -1000,7 +1000,7 @@ static void enable_lvtma_control_dmcub(
 	struct dc_dmub_srv *dmcub,
 	uint8_t uc_pwr_on,
 	uint8_t panel_instance,
-	uint8_t bypass_powerdown_wait)
+	uint8_t bypass_panel_control_wait)
 {
 
 	union dmub_rb_cmd cmd;
@@ -1014,8 +1014,8 @@ static void enable_lvtma_control_dmcub(
 			uc_pwr_on;
 	cmd.lvtma_control.data.panel_inst =
 			panel_instance;
-	cmd.lvtma_control.data.bypass_powerdown_wait =
-			bypass_powerdown_wait;
+	cmd.lvtma_control.data.bypass_panel_control_wait =
+			bypass_panel_control_wait;
 	dc_dmub_srv_cmd_queue(dmcub, &cmd);
 	dc_dmub_srv_cmd_execute(dmcub);
 	dc_dmub_srv_wait_idle(dmcub);
@@ -1026,7 +1026,7 @@ static enum bp_result enable_lvtma_control(
 	struct bios_parser *bp,
 	uint8_t uc_pwr_on,
 	uint8_t panel_instance,
-	uint8_t bypass_powerdown_wait)
+	uint8_t bypass_panel_control_wait)
 {
 	enum bp_result result = BP_RESULT_FAILURE;
 
@@ -1035,7 +1035,7 @@ static enum bp_result enable_lvtma_control(
 		enable_lvtma_control_dmcub(bp->base.ctx->dmub_srv,
 				uc_pwr_on,
 				panel_instance,
-				bypass_powerdown_wait);
+				bypass_panel_control_wait);
 		return BP_RESULT_OK;
 	}
 	return result;
diff --git a/drivers/gpu/drm/amd/display/dc/bios/command_table2.h b/drivers/gpu/drm/amd/display/dc/bios/command_table2.h
index acb7cc69f699..b6d09bf6cf72 100644
--- a/drivers/gpu/drm/amd/display/dc/bios/command_table2.h
+++ b/drivers/gpu/drm/amd/display/dc/bios/command_table2.h
@@ -97,7 +97,7 @@ struct cmd_tbl {
 	enum bp_result (*enable_lvtma_control)(struct bios_parser *bp,
 			uint8_t uc_pwr_on,
 			uint8_t panel_instance,
-			uint8_t bypass_powerdown_wait);
+			uint8_t bypass_panel_control_wait);
 };
 
 void dal_firmware_parser_init_cmd_tbl(struct bios_parser *bp);