diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr_vbios_smu.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr_vbios_smu.c | 51 |
1 files changed, 48 insertions, 3 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr_vbios_smu.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr_vbios_smu.c index 6878aedf1d3e..9a374522e963 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr_vbios_smu.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr_vbios_smu.c @@ -26,6 +26,7 @@ #include "core_types.h" #include "clk_mgr_internal.h" #include "reg_helper.h" +#include <linux/delay.h> #include "renoir_ip_offset.h" @@ -51,12 +52,46 @@ #define VBIOSSMC_MSG_GetFclkFrequency 0xB #define VBIOSSMC_MSG_SetDisplayCount 0xC #define VBIOSSMC_MSG_EnableTmdp48MHzRefclkPwrDown 0xD -#define VBIOSSMC_MSG_UpdatePmeRestore 0xE +#define VBIOSSMC_MSG_UpdatePmeRestore 0xE +#define VBIOSSMC_MSG_IsPeriodicRetrainingDisabled 0xF + +#define VBIOSSMC_Status_BUSY 0x0 +#define VBIOSSMC_Result_OK 0x1 +#define VBIOSSMC_Result_Failed 0xFF +#define VBIOSSMC_Result_UnknownCmd 0xFE +#define VBIOSSMC_Result_CmdRejectedPrereq 0xFD +#define VBIOSSMC_Result_CmdRejectedBusy 0xFC + +/* + * Function to be used instead of REG_WAIT macro because the wait ends when + * the register is NOT EQUAL to zero, and because the translation in msg_if.h + * won't work with REG_WAIT. + */ +static uint32_t rn_smu_wait_for_response(struct clk_mgr_internal *clk_mgr, unsigned int delay_us, unsigned int max_retries) +{ + uint32_t res_val = VBIOSSMC_Status_BUSY; + + do { + res_val = REG_READ(MP1_SMN_C2PMSG_91); + if (res_val != VBIOSSMC_Status_BUSY) + break; + + if (delay_us >= 1000) + msleep(delay_us/1000); + else if (delay_us > 0) + udelay(delay_us); + } while (max_retries--); + + return res_val; +} + int rn_vbios_smu_send_msg_with_param(struct clk_mgr_internal *clk_mgr, unsigned int msg_id, unsigned int param) { + uint32_t result; + /* First clear response register */ - REG_WRITE(MP1_SMN_C2PMSG_91, 0); + REG_WRITE(MP1_SMN_C2PMSG_91, VBIOSSMC_Status_BUSY); /* Set the parameter register for the SMU message, unit is Mhz */ REG_WRITE(MP1_SMN_C2PMSG_83, param); @@ -64,7 +99,9 @@ int rn_vbios_smu_send_msg_with_param(struct clk_mgr_internal *clk_mgr, unsigned /* Trigger the message transaction by writing the message ID */ REG_WRITE(MP1_SMN_C2PMSG_67, msg_id); - REG_WAIT(MP1_SMN_C2PMSG_91, CONTENT, 1, 10, 200000); + result = rn_smu_wait_for_response(clk_mgr, 10, 1000); + + ASSERT(result == VBIOSSMC_Result_OK || result == VBIOSSMC_Result_UnknownCmd); /* Actual dispclk set is returned in the parameter register */ return REG_READ(MP1_SMN_C2PMSG_83); @@ -196,3 +233,11 @@ void rn_vbios_smu_enable_pme_wa(struct clk_mgr_internal *clk_mgr) VBIOSSMC_MSG_UpdatePmeRestore, 0); } + +int rn_vbios_smu_is_periodic_retraining_disabled(struct clk_mgr_internal *clk_mgr) +{ + return rn_vbios_smu_send_msg_with_param( + clk_mgr, + VBIOSSMC_MSG_IsPeriodicRetrainingDisabled, + 0); +} |