drm/amd/display: send pipe set command to dmcu when stream unblanks

[Why]
When stream is blanked, pipe set command is sent to dmcu to notify it
that the abm pipe is disabled. When stream is unblanked, no notification is
made to dmcu that the abm pipe has been enabled, resulting in abm not
being enabled in the firmware.

[How]
When stream is unblanked, send a pipe set command to dmcu.

Signed-off-by: Josip Pavic <Josip.Pavic@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

3 files changed, 21 insertions, 16 deletions

diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c b/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c
index 01e56f1a9f34..a740bc3418a1 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c
@@ -175,7 +175,6 @@ static void dmcu_set_backlight_level(
 	uint32_t controller_id)
 {
 	unsigned int backlight_8_bit = 0;
-	uint32_t rampingBoundary = 0xFFFF;
 	uint32_t s2;
 
 	if (backlight_pwm_u16_16 & 0x10000)
@@ -185,17 +184,6 @@ static void dmcu_set_backlight_level(
 		// Take MSB of fractional part since backlight is not max
 		backlight_8_bit = (backlight_pwm_u16_16 >> 8) & 0xFF;
 
-	/* set ramping boundary */
-	REG_WRITE(MASTER_COMM_DATA_REG1, rampingBoundary);
-
-	/* setDMCUParam_Pipe */
-	REG_UPDATE_2(MASTER_COMM_CMD_REG,
-			MASTER_COMM_CMD_REG_BYTE0, MCP_ABM_PIPE_SET,
-			MASTER_COMM_CMD_REG_BYTE1, controller_id);
-
-	/* notifyDMCUMsg */
-	REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
-
 	/* waitDMCUReadyForCmd */
 	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT,
 			0, 1, 80000);
@@ -305,21 +293,34 @@ static bool dce_abm_set_level(struct abm *abm, uint32_t level)
 	return true;
 }
 
-static bool dce_abm_immediate_disable(struct abm *abm)
+static bool dce_abm_set_pipe(struct abm *abm, uint32_t controller_id)
 {
 	struct dce_abm *abm_dce = TO_DCE_ABM(abm);
+	uint32_t rampingBoundary = 0xFFFF;
 
 	REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0,
 			1, 80000);
 
-	/* setDMCUParam_ABMLevel */
+	/* set ramping boundary */
+	REG_WRITE(MASTER_COMM_DATA_REG1, rampingBoundary);
+
+	/* setDMCUParam_Pipe */
 	REG_UPDATE_2(MASTER_COMM_CMD_REG,
 			MASTER_COMM_CMD_REG_BYTE0, MCP_ABM_PIPE_SET,
-			MASTER_COMM_CMD_REG_BYTE1, MCP_DISABLE_ABM_IMMEDIATELY);
+			MASTER_COMM_CMD_REG_BYTE1, controller_id);
 
 	/* notifyDMCUMsg */
 	REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
 
+	return true;
+}
+
+static bool dce_abm_immediate_disable(struct abm *abm)
+{
+	struct dce_abm *abm_dce = TO_DCE_ABM(abm);
+
+	dce_abm_set_pipe(abm, MCP_DISABLE_ABM_IMMEDIATELY);
+
 	abm->stored_backlight_registers.BL_PWM_CNTL =
 		REG_READ(BL_PWM_CNTL);
 	abm->stored_backlight_registers.BL_PWM_CNTL2 =
@@ -419,6 +420,7 @@ static const struct abm_funcs dce_funcs = {
 	.abm_init = dce_abm_init,
 	.set_abm_level = dce_abm_set_level,
 	.init_backlight = dce_abm_init_backlight,
+	.set_pipe = dce_abm_set_pipe,
 	.set_backlight_level_pwm = dce_abm_set_backlight_level_pwm,
 	.get_current_backlight = dce_abm_get_current_backlight,
 	.get_target_backlight = dce_abm_get_target_backlight,
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
index 117d9d8227f7..7f95808ad885 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c
@@ -2162,8 +2162,10 @@ static void dcn10_blank_pixel_data(
 	if (!blank) {
 		if (stream_res->tg->funcs->set_blank)
 			stream_res->tg->funcs->set_blank(stream_res->tg, blank);
-		if (stream_res->abm)
+		if (stream_res->abm) {
+			stream_res->abm->funcs->set_pipe(stream_res->abm, stream_res->tg->inst + 1);
 			stream_res->abm->funcs->set_abm_level(stream_res->abm, stream->abm_level);
+		}
 	} else if (blank) {
 		if (stream_res->abm)
 			stream_res->abm->funcs->set_abm_immediate_disable(stream_res->abm);
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/abm.h b/drivers/gpu/drm/amd/display/dc/inc/hw/abm.h
index abc961c0906e..86dc39a02408 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/abm.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/abm.h
@@ -46,6 +46,7 @@ struct abm_funcs {
 	void (*abm_init)(struct abm *abm);
 	bool (*set_abm_level)(struct abm *abm, unsigned int abm_level);
 	bool (*set_abm_immediate_disable)(struct abm *abm);
+	bool (*set_pipe)(struct abm *abm, unsigned int controller_id);
 	bool (*init_backlight)(struct abm *abm);
 
 	/* backlight_pwm_u16_16 is unsigned 32 bit,