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drm/amd/pm/smu11: poll BACO status after RPM BACO exits

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After executing BACO exit, driver needs to poll the status
to ensure FW has completed BACO exit sequence to prevent
timing issue.

v2: use usleep_range to replace msleep to fix checkpatch.pl warnings

Signed-off-by: Guchun Chen <guchun.chen@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Guchun Chen
2022-11-22 17:47:04 +08:00
committed by Alex Deucher
parent 6dca7efe6e
commit 86a3c691db
1 changed files with 23 additions and 1 deletions
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24
drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
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@@ -79,6 +79,17 @@ MODULE_FIRMWARE("amdgpu/beige_goby_smc.bin");
#define mmTHM_BACO_CNTL_ARCT 0xA7
#define mmTHM_BACO_CNTL_ARCT_BASE_IDX 0
static void smu_v11_0_poll_baco_exit(struct smu_context *smu)
{
struct amdgpu_device *adev = smu->adev;
uint32_t data, loop = 0;
do {
usleep_range(1000, 1100);
data = RREG32_SOC15(THM, 0, mmTHM_BACO_CNTL);
} while ((data & 0x100) && (++loop < 100));
}
int smu_v11_0_init_microcode(struct smu_context *smu)
{
struct amdgpu_device *adev = smu->adev;
@@ -1689,7 +1700,18 @@ int smu_v11_0_baco_enter(struct smu_context *smu)
int smu_v11_0_baco_exit(struct smu_context *smu)
{
return smu_v11_0_baco_set_state(smu, SMU_BACO_STATE_EXIT);
int ret;
ret = smu_v11_0_baco_set_state(smu, SMU_BACO_STATE_EXIT);
if (!ret) {
/*
* Poll BACO exit status to ensure FW has completed
* BACO exit process to avoid timing issues.
*/
smu_v11_0_poll_baco_exit(smu);
}
return ret;
}
int smu_v11_0_mode1_reset(struct smu_context *smu)