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From d7d956752fb9ed9312668bb5ce823986d1a4e8bf Mon Sep 17 00:00:00 2001
From: Anthony Koo <Anthony.Koo@amd.com>
Date: Thu, 4 Apr 2019 09:44:55 -0400
Subject: [PATCH 1810/2940] drm/amd/display: Send DMCU messages only if FW
loaded
[Why]
Some DMCU messages were being sent in cases where
there was no DMCU FW at all, which resulted in some wait
timeouts
[How]
Delay sending some of the DMCU messages after FW
init is called and DMCU is running.
Signed-off-by: Anthony Koo <Anthony.Koo@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
---
drivers/gpu/drm/amd/display/dc/dce/dce_abm.c | 18 -----------
drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c | 31 ++++++++++++++++++-
2 files changed, 30 insertions(+), 19 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 855360b1414f..da96229db53a 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_abm.c
@@ -50,7 +50,6 @@
#define MCP_ABM_LEVEL_SET 0x65
#define MCP_ABM_PIPE_SET 0x66
#define MCP_BL_SET 0x67
-#define MCP_BL_SET_PWM_FRAC 0x6A /* Enable or disable Fractional PWM */
#define MCP_DISABLE_ABM_IMMEDIATELY 255
@@ -391,23 +390,6 @@ static bool dce_abm_init_backlight(struct abm *abm)
REG_UPDATE(BL_PWM_GRP1_REG_LOCK,
BL_PWM_GRP1_REG_LOCK, 0);
- /* Wait until microcontroller is ready to process interrupt */
- REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 100, 800);
-
- /* Set PWM fractional enable/disable */
- value = (abm->ctx->dc->config.disable_fractional_pwm == false) ? 1 : 0;
- REG_WRITE(MASTER_COMM_DATA_REG1, value);
-
- /* Set command to enable or disable fractional PWM microcontroller */
- REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0,
- MCP_BL_SET_PWM_FRAC);
-
- /* Notify microcontroller of new command */
- REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
-
- /* Ensure command has been executed before continuing */
- REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 100, 800);
-
return true;
}
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c
index 916628a5c895..9b490f5c46de 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c
@@ -51,6 +51,7 @@
#define PSR_SET_WAITLOOP 0x31
#define MCP_INIT_DMCU 0x88
#define MCP_INIT_IRAM 0x89
+#define MCP_BL_SET_PWM_FRAC 0x6A /* Enable or disable Fractional PWM */
#define MASTER_COMM_CNTL_REG__MASTER_COMM_INTERRUPT_MASK 0x00000001L
static bool dce_dmcu_init(struct dmcu *dmcu)
@@ -339,9 +340,32 @@ static void dcn10_get_dmcu_version(struct dmcu *dmcu)
IRAM_RD_ADDR_AUTO_INC, 0);
}
+static void dcn10_dmcu_enable_fractional_pwm(struct dmcu *dmcu,
+ uint32_t fractional_pwm)
+{
+ struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+
+ /* Wait until microcontroller is ready to process interrupt */
+ REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 100, 800);
+
+ /* Set PWM fractional enable/disable */
+ REG_WRITE(MASTER_COMM_DATA_REG1, fractional_pwm);
+
+ /* Set command to enable or disable fractional PWM microcontroller */
+ REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0,
+ MCP_BL_SET_PWM_FRAC);
+
+ /* Notify microcontroller of new command */
+ REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1);
+
+ /* Ensure command has been executed before continuing */
+ REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 100, 800);
+}
+
static bool dcn10_dmcu_init(struct dmcu *dmcu)
{
struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu);
+ const struct dc_config *config = &dmcu->ctx->dc->config;
bool status = false;
/* Definition of DC_DMCU_SCRATCH
@@ -379,9 +403,14 @@ static bool dcn10_dmcu_init(struct dmcu *dmcu)
if (dmcu->dmcu_state == DMCU_RUNNING) {
/* Retrieve and cache the DMCU firmware version. */
dcn10_get_dmcu_version(dmcu);
+
+ /* Initialize DMCU to use fractional PWM or not */
+ dcn10_dmcu_enable_fractional_pwm(dmcu,
+ (config->disable_fractional_pwm == false) ? 1 : 0);
status = true;
- } else
+ } else {
status = false;
+ }
break;
case DMCU_RUNNING:
--
2.17.1
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