From: Evan Quan evan.quan@amd.com
commit 1cf8c930b378016846c88ef0f1444248033326ec upstream.
This workaround is needed only for Navi10 12 Gbps SKUs.
V2: added SMU firmware version guard
Signed-off-by: Evan Quan evan.quan@amd.com Reviewed-by: Feifei Xu Feifei.Xu@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/gpu/drm/amd/powerplay/amdgpu_smu.c | 18 ++++++ drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h | 1 drivers/gpu/drm/amd/powerplay/inc/smu_types.h | 2 drivers/gpu/drm/amd/powerplay/inc/smu_v11_0_ppsmc.h | 5 + drivers/gpu/drm/amd/powerplay/navi10_ppt.c | 58 ++++++++++++++++++++ drivers/gpu/drm/amd/powerplay/smu_internal.h | 3 + 6 files changed, 86 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c +++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c @@ -21,6 +21,7 @@ */
#include <linux/firmware.h> +#include <linux/pci.h>
#include "pp_debug.h" #include "amdgpu.h" @@ -1125,6 +1126,23 @@ static int smu_smc_table_hw_init(struct ret = smu_get_power_limit(smu, &smu->default_power_limit, false, false); if (ret) return ret; + + if (adev->asic_type == CHIP_NAVI10) { + if ((adev->pdev->device == 0x731f && (adev->pdev->revision == 0xc2 || + adev->pdev->revision == 0xc3 || + adev->pdev->revision == 0xca || + adev->pdev->revision == 0xcb)) || + (adev->pdev->device == 0x66af && (adev->pdev->revision == 0xf3 || + adev->pdev->revision == 0xf4 || + adev->pdev->revision == 0xf5 || + adev->pdev->revision == 0xf6))) { + ret = smu_disable_umc_cdr_12gbps_workaround(smu); + if (ret) { + pr_err("Workaround failed to disable UMC CDR feature on 12Gbps SKU!\n"); + return ret; + } + } + } }
/* --- a/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h +++ b/drivers/gpu/drm/amd/powerplay/inc/amdgpu_smu.h @@ -550,6 +550,7 @@ struct pptable_funcs { int (*set_soft_freq_limited_range)(struct smu_context *smu, enum smu_clk_type clk_type, uint32_t min, uint32_t max); int (*override_pcie_parameters)(struct smu_context *smu); uint32_t (*get_pptable_power_limit)(struct smu_context *smu); + int (*disable_umc_cdr_12gbps_workaround)(struct smu_context *smu); };
int smu_load_microcode(struct smu_context *smu); --- a/drivers/gpu/drm/amd/powerplay/inc/smu_types.h +++ b/drivers/gpu/drm/amd/powerplay/inc/smu_types.h @@ -170,6 +170,8 @@ __SMU_DUMMY_MAP(SetSoftMinJpeg), \ __SMU_DUMMY_MAP(SetHardMinFclkByFreq), \ __SMU_DUMMY_MAP(DFCstateControl), \ + __SMU_DUMMY_MAP(DAL_DISABLE_DUMMY_PSTATE_CHANGE), \ + __SMU_DUMMY_MAP(DAL_ENABLE_DUMMY_PSTATE_CHANGE), \
#undef __SMU_DUMMY_MAP #define __SMU_DUMMY_MAP(type) SMU_MSG_##type --- a/drivers/gpu/drm/amd/powerplay/inc/smu_v11_0_ppsmc.h +++ b/drivers/gpu/drm/amd/powerplay/inc/smu_v11_0_ppsmc.h @@ -120,7 +120,10 @@ #define PPSMC_MSG_GetVoltageByDpmOverdrive 0x45 #define PPSMC_MSG_BacoAudioD3PME 0x48
-#define PPSMC_Message_Count 0x49 +#define PPSMC_MSG_DALDisableDummyPstateChange 0x49 +#define PPSMC_MSG_DALEnableDummyPstateChange 0x4A + +#define PPSMC_Message_Count 0x4B
typedef uint32_t PPSMC_Result; typedef uint32_t PPSMC_Msg; --- a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c +++ b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c @@ -119,6 +119,8 @@ static struct smu_11_0_cmn2aisc_mapping MSG_MAP(PowerDownJpeg, PPSMC_MSG_PowerDownJpeg), MSG_MAP(BacoAudioD3PME, PPSMC_MSG_BacoAudioD3PME), MSG_MAP(ArmD3, PPSMC_MSG_ArmD3), + MSG_MAP(DAL_DISABLE_DUMMY_PSTATE_CHANGE,PPSMC_MSG_DALDisableDummyPstateChange), + MSG_MAP(DAL_ENABLE_DUMMY_PSTATE_CHANGE, PPSMC_MSG_DALEnableDummyPstateChange), };
static struct smu_11_0_cmn2aisc_mapping navi10_clk_map[SMU_CLK_COUNT] = { @@ -2000,6 +2002,61 @@ static int navi10_run_btc(struct smu_con return ret; }
+static int navi10_dummy_pstate_control(struct smu_context *smu, bool enable) +{ + int result = 0; + + if (!enable) + result = smu_send_smc_msg(smu, SMU_MSG_DAL_DISABLE_DUMMY_PSTATE_CHANGE); + else + result = smu_send_smc_msg(smu, SMU_MSG_DAL_ENABLE_DUMMY_PSTATE_CHANGE); + + return result; +} + +static int navi10_disable_umc_cdr_12gbps_workaround(struct smu_context *smu) +{ + uint32_t uclk_count, uclk_min, uclk_max; + uint32_t smu_version; + int ret = 0; + + ret = smu_get_smc_version(smu, NULL, &smu_version); + if (ret) + return ret; + + /* This workaround is available only for 42.50 or later SMC firmwares */ + if (smu_version < 0x2A3200) + return 0; + + ret = smu_get_dpm_level_count(smu, SMU_UCLK, &uclk_count); + if (ret) + return ret; + + ret = smu_get_dpm_freq_by_index(smu, SMU_UCLK, (uint16_t)0, &uclk_min); + if (ret) + return ret; + + ret = smu_get_dpm_freq_by_index(smu, SMU_UCLK, (uint16_t)(uclk_count - 1), &uclk_max); + if (ret) + return ret; + + /* Force UCLK out of the highest DPM */ + ret = smu_set_hard_freq_range(smu, SMU_UCLK, 0, uclk_min); + if (ret) + return ret; + + /* Revert the UCLK Hardmax */ + ret = smu_set_hard_freq_range(smu, SMU_UCLK, 0, uclk_max); + if (ret) + return ret; + + /* + * In this case, SMU already disabled dummy pstate during enablement + * of UCLK DPM, we have to re-enabled it. + * */ + return navi10_dummy_pstate_control(smu, true); +} + static const struct pptable_funcs navi10_ppt_funcs = { .tables_init = navi10_tables_init, .alloc_dpm_context = navi10_allocate_dpm_context, @@ -2091,6 +2148,7 @@ static const struct pptable_funcs navi10 .od_edit_dpm_table = navi10_od_edit_dpm_table, .get_pptable_power_limit = navi10_get_pptable_power_limit, .run_btc = navi10_run_btc, + .disable_umc_cdr_12gbps_workaround = navi10_disable_umc_cdr_12gbps_workaround, };
void navi10_set_ppt_funcs(struct smu_context *smu) --- a/drivers/gpu/drm/amd/powerplay/smu_internal.h +++ b/drivers/gpu/drm/amd/powerplay/smu_internal.h @@ -201,4 +201,7 @@ int smu_send_smc_msg(struct smu_context #define smu_update_pcie_parameters(smu, pcie_gen_cap, pcie_width_cap) \ ((smu)->ppt_funcs->update_pcie_parameters ? (smu)->ppt_funcs->update_pcie_parameters((smu), (pcie_gen_cap), (pcie_width_cap)) : 0)
+#define smu_disable_umc_cdr_12gbps_workaround(smu) \ + ((smu)->ppt_funcs->disable_umc_cdr_12gbps_workaround ? (smu)->ppt_funcs->disable_umc_cdr_12gbps_workaround((smu)) : 0) + #endif