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drm/amd/display: Send DMCU messages only if FW loaded

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[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>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Anthony Koo 2019-04-04 09:44:55 -04:00 committed by Alex Deucher
parent 43e3ac8389
commit abdef75583
2 changed files with 30 additions and 19 deletions
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18
drivers/gpu/drm/amd/display/dc/dce/dce_abm.c
View file

@ -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;
}

31
drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c
View file

@ -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: