diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c | 34 |
1 files changed, 32 insertions, 2 deletions
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 a6de99db0444..f663adb33584 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c @@ -263,15 +263,35 @@ static void dce_dmcu_setup_psr(struct dmcu *dmcu, REG_UPDATE(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 1); } +static bool dce_is_dmcu_initialized(struct dmcu *dmcu) +{ + struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu); + unsigned int dmcu_uc_reset; + + /* microcontroller is not running */ + REG_GET(DMCU_STATUS, UC_IN_RESET, &dmcu_uc_reset); + + /* DMCU is not running */ + if (dmcu_uc_reset) + return false; + + return true; +} + static void dce_psr_wait_loop( struct dmcu *dmcu, unsigned int wait_loop_number) { struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu); union dce_dmcu_psr_config_data_wait_loop_reg1 masterCmdData1; + if (dmcu->cached_wait_loop_number == wait_loop_number) return; + /* DMCU is not running */ + if (!dce_is_dmcu_initialized(dmcu)) + return; + /* waitDMCUReadyForCmd */ REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 1, 10000); @@ -691,6 +711,14 @@ static void dcn10_get_psr_wait_loop( return; } +static bool dcn10_is_dmcu_initialized(struct dmcu *dmcu) +{ + /* microcontroller is not running */ + if (dmcu->dmcu_state != DMCU_RUNNING) + return false; + return true; +} + #endif static const struct dmcu_funcs dce_funcs = { @@ -700,7 +728,8 @@ static const struct dmcu_funcs dce_funcs = { .setup_psr = dce_dmcu_setup_psr, .get_psr_state = dce_get_dmcu_psr_state, .set_psr_wait_loop = dce_psr_wait_loop, - .get_psr_wait_loop = dce_get_psr_wait_loop + .get_psr_wait_loop = dce_get_psr_wait_loop, + .is_dmcu_initialized = dce_is_dmcu_initialized }; #if defined(CONFIG_DRM_AMD_DC_DCN1_0) @@ -711,7 +740,8 @@ static const struct dmcu_funcs dcn10_funcs = { .setup_psr = dcn10_dmcu_setup_psr, .get_psr_state = dcn10_get_dmcu_psr_state, .set_psr_wait_loop = dcn10_psr_wait_loop, - .get_psr_wait_loop = dcn10_get_psr_wait_loop + .get_psr_wait_loop = dcn10_get_psr_wait_loop, + .is_dmcu_initialized = dcn10_is_dmcu_initialized }; #endif |