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 | 176 |
1 files changed, 170 insertions, 6 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 fd77df573b61..508c1aa4a775 100644 --- a/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c +++ b/drivers/gpu/drm/amd/display/dc/dce/dce_dmcu.c @@ -49,9 +49,18 @@ #define PSR_EXIT 0x21 #define PSR_SET 0x23 #define PSR_SET_WAITLOOP 0x31 +#define MCP_INIT_DMCU 0x88 +#define MCP_INIT_IRAM 0x89 +#define MCP_DMCU_VERSION 0x90 #define MASTER_COMM_CNTL_REG__MASTER_COMM_INTERRUPT_MASK 0x00000001L unsigned int cached_wait_loop_number = 0; +static bool dce_dmcu_init(struct dmcu *dmcu) +{ + // Do nothing + return true; +} + bool dce_dmcu_load_iram(struct dmcu *dmcu, unsigned int start_offset, const char *src, @@ -84,7 +93,7 @@ static void dce_get_dmcu_psr_state(struct dmcu *dmcu, uint32_t *psr_state) { struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu); - uint32_t psrStateOffset = 0xf0; + uint32_t psr_state_offset = 0xf0; /* Enable write access to IRAM */ REG_UPDATE(DMCU_RAM_ACCESS_CTRL, IRAM_HOST_ACCESS_EN, 1); @@ -92,7 +101,7 @@ static void dce_get_dmcu_psr_state(struct dmcu *dmcu, uint32_t *psr_state) REG_WAIT(DCI_MEM_PWR_STATUS, DMCU_IRAM_MEM_PWR_STATE, 0, 2, 10); /* Write address to IRAM_RD_ADDR in DMCU_IRAM_RD_CTRL */ - REG_WRITE(DMCU_IRAM_RD_CTRL, psrStateOffset); + REG_WRITE(DMCU_IRAM_RD_CTRL, psr_state_offset); /* Read data from IRAM_RD_DATA in DMCU_IRAM_RD_DATA*/ *psr_state = REG_READ(DMCU_IRAM_RD_DATA); @@ -286,7 +295,128 @@ static void dce_get_psr_wait_loop(unsigned int *psr_wait_loop_number) } #if defined(CONFIG_DRM_AMD_DC_DCN1_0) -bool dcn10_dmcu_load_iram(struct dmcu *dmcu, +static void dcn10_get_dmcu_state(struct dmcu *dmcu) +{ + struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu); + uint32_t dmcu_state_offset = 0xf6; + + /* Enable write access to IRAM */ + REG_UPDATE_2(DMCU_RAM_ACCESS_CTRL, + IRAM_HOST_ACCESS_EN, 1, + IRAM_RD_ADDR_AUTO_INC, 1); + + REG_WAIT(DMU_MEM_PWR_CNTL, DMCU_IRAM_MEM_PWR_STATE, 0, 2, 10); + + /* Write address to IRAM_RD_ADDR in DMCU_IRAM_RD_CTRL */ + REG_WRITE(DMCU_IRAM_RD_CTRL, dmcu_state_offset); + + /* Read data from IRAM_RD_DATA in DMCU_IRAM_RD_DATA*/ + dmcu->dmcu_state = REG_READ(DMCU_IRAM_RD_DATA); + + /* Disable write access to IRAM to allow dynamic sleep state */ + REG_UPDATE_2(DMCU_RAM_ACCESS_CTRL, + IRAM_HOST_ACCESS_EN, 0, + IRAM_RD_ADDR_AUTO_INC, 0); +} + +static void dcn10_get_dmcu_version(struct dmcu *dmcu) +{ + struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu); + uint32_t dmcu_version_offset = 0xf1; + + /* Clear scratch */ + REG_WRITE(DC_DMCU_SCRATCH, 0); + + /* Enable write access to IRAM */ + REG_UPDATE_2(DMCU_RAM_ACCESS_CTRL, + IRAM_HOST_ACCESS_EN, 1, + IRAM_RD_ADDR_AUTO_INC, 1); + + REG_WAIT(DMU_MEM_PWR_CNTL, DMCU_IRAM_MEM_PWR_STATE, 0, 2, 10); + + /* Write address to IRAM_RD_ADDR and read from DATA register */ + REG_WRITE(DMCU_IRAM_RD_CTRL, dmcu_version_offset); + dmcu->dmcu_version.interface_version = REG_READ(DMCU_IRAM_RD_DATA); + dmcu->dmcu_version.year = ((REG_READ(DMCU_IRAM_RD_DATA) << 8) | + REG_READ(DMCU_IRAM_RD_DATA)); + dmcu->dmcu_version.month = REG_READ(DMCU_IRAM_RD_DATA); + dmcu->dmcu_version.day = REG_READ(DMCU_IRAM_RD_DATA); + + /* Disable write access to IRAM to allow dynamic sleep state */ + REG_UPDATE_2(DMCU_RAM_ACCESS_CTRL, + IRAM_HOST_ACCESS_EN, 0, + IRAM_RD_ADDR_AUTO_INC, 0); + + /* Send MCP command message to DMCU to get version reply from FW. + * We expect this version should match the one in IRAM, otherwise + * something is wrong with DMCU and we should fail and disable UC. + */ + REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 100, 800); + + /* Set command to get DMCU version from microcontroller */ + REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0, + MCP_DMCU_VERSION); + + /* 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); + + /* Somehow version does not match, so fail and return version 0 */ + if (dmcu->dmcu_version.interface_version != REG_READ(DC_DMCU_SCRATCH)) + dmcu->dmcu_version.interface_version = 0; +} + +static bool dcn10_dmcu_init(struct dmcu *dmcu) +{ + struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu); + + /* DMCU FW should populate the scratch register if running */ + if (REG_READ(DC_DMCU_SCRATCH) == 0) + return false; + + /* Check state is uninitialized */ + dcn10_get_dmcu_state(dmcu); + + /* If microcontroller is already initialized, do nothing */ + if (dmcu->dmcu_state == DMCU_RUNNING) + return true; + + /* Retrieve and cache the DMCU firmware version. */ + dcn10_get_dmcu_version(dmcu); + + /* Check interface version to confirm firmware is loaded and running */ + if (dmcu->dmcu_version.interface_version == 0) + return false; + + /* Wait until microcontroller is ready to process interrupt */ + REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 100, 800); + + /* Set initialized ramping boundary value */ + REG_WRITE(MASTER_COMM_DATA_REG1, 0xFFFF); + + /* Set command to initialize microcontroller */ + REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0, + MCP_INIT_DMCU); + + /* 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); + + // Check state is initialized + dcn10_get_dmcu_state(dmcu); + + // If microcontroller is not in running state, fail + if (dmcu->dmcu_state != DMCU_RUNNING) + return false; + + return true; +} + +static bool dcn10_dmcu_load_iram(struct dmcu *dmcu, unsigned int start_offset, const char *src, unsigned int bytes) @@ -294,7 +424,9 @@ bool dcn10_dmcu_load_iram(struct dmcu *dmcu, struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu); unsigned int count = 0; - REG_UPDATE(DMCU_CTRL, DMCU_ENABLE, 1); + /* If microcontroller is not running, do nothing */ + if (dmcu->dmcu_state != DMCU_RUNNING) + return false; /* Enable write access to IRAM */ REG_UPDATE_2(DMCU_RAM_ACCESS_CTRL, @@ -313,6 +445,19 @@ bool dcn10_dmcu_load_iram(struct dmcu *dmcu, IRAM_HOST_ACCESS_EN, 0, IRAM_WR_ADDR_AUTO_INC, 0); + /* Wait until microcontroller is ready to process interrupt */ + REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 100, 800); + + /* Set command to signal IRAM is loaded and to initialize IRAM */ + REG_UPDATE(MASTER_COMM_CMD_REG, MASTER_COMM_CMD_REG_BYTE0, + MCP_INIT_IRAM); + + /* 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; } @@ -320,7 +465,11 @@ static void dcn10_get_dmcu_psr_state(struct dmcu *dmcu, uint32_t *psr_state) { struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu); - uint32_t psrStateOffset = 0xf0; + uint32_t psr_state_offset = 0xf0; + + /* If microcontroller is not running, do nothing */ + if (dmcu->dmcu_state != DMCU_RUNNING) + return; /* Enable write access to IRAM */ REG_UPDATE(DMCU_RAM_ACCESS_CTRL, IRAM_HOST_ACCESS_EN, 1); @@ -328,7 +477,7 @@ static void dcn10_get_dmcu_psr_state(struct dmcu *dmcu, uint32_t *psr_state) REG_WAIT(DMU_MEM_PWR_CNTL, DMCU_IRAM_MEM_PWR_STATE, 0, 2, 10); /* Write address to IRAM_RD_ADDR in DMCU_IRAM_RD_CTRL */ - REG_WRITE(DMCU_IRAM_RD_CTRL, psrStateOffset); + REG_WRITE(DMCU_IRAM_RD_CTRL, psr_state_offset); /* Read data from IRAM_RD_DATA in DMCU_IRAM_RD_DATA*/ *psr_state = REG_READ(DMCU_IRAM_RD_DATA); @@ -348,6 +497,10 @@ static void dcn10_dmcu_set_psr_enable(struct dmcu *dmcu, bool enable, bool wait) unsigned int retryCount; uint32_t psr_state = 0; + /* If microcontroller is not running, do nothing */ + if (dmcu->dmcu_state != DMCU_RUNNING) + return; + /* waitDMCUReadyForCmd */ REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, dmcu_wait_reg_ready_interval, @@ -399,6 +552,10 @@ static void dcn10_dmcu_setup_psr(struct dmcu *dmcu, union dce_dmcu_psr_config_data_reg2 masterCmdData2; union dce_dmcu_psr_config_data_reg3 masterCmdData3; + /* If microcontroller is not running, do nothing */ + if (dmcu->dmcu_state != DMCU_RUNNING) + return; + link->link_enc->funcs->psr_program_dp_dphy_fast_training(link->link_enc, psr_context->psrExitLinkTrainingRequired); @@ -505,6 +662,11 @@ static void dcn10_psr_wait_loop( { struct dce_dmcu *dmcu_dce = TO_DCE_DMCU(dmcu); union dce_dmcu_psr_config_data_wait_loop_reg1 masterCmdData1; + + /* If microcontroller is not running, do nothing */ + if (dmcu->dmcu_state != DMCU_RUNNING) + return; + if (wait_loop_number != 0) { /* waitDMCUReadyForCmd */ REG_WAIT(MASTER_COMM_CNTL_REG, MASTER_COMM_INTERRUPT, 0, 1, 10000); @@ -531,6 +693,7 @@ static void dcn10_get_psr_wait_loop(unsigned int *psr_wait_loop_number) #endif static const struct dmcu_funcs dce_funcs = { + .dmcu_init = dce_dmcu_init, .load_iram = dce_dmcu_load_iram, .set_psr_enable = dce_dmcu_set_psr_enable, .setup_psr = dce_dmcu_setup_psr, @@ -541,6 +704,7 @@ static const struct dmcu_funcs dce_funcs = { #if defined(CONFIG_DRM_AMD_DC_DCN1_0) static const struct dmcu_funcs dcn10_funcs = { + .dmcu_init = dcn10_dmcu_init, .load_iram = dcn10_dmcu_load_iram, .set_psr_enable = dcn10_dmcu_set_psr_enable, .setup_psr = dcn10_dmcu_setup_psr, |