[PATCH 5.5 271/367] drm/amdgpu: fetch default VDDC curve voltages (v2)

Greg Kroah-Hartman
2020-02-10T12:49:01Z

From: Alex Deucher <alexander.deucher@amd.com>

commit 0531aa6eb38bfa9514609e2727558a051da7365f upstream.

Ask the SMU for the default VDDC curve voltage values. This
properly reports the VDDC values in the OD interface.

v2: only update if the original values are 0

Bug: https://gitlab.freedesktop.org/drm/amd/issues/1020
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org # 5.5.x
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
drivers/gpu/drm/amd/powerplay/navi10_ppt.c | 50 ++++++++++++++++++++++++++++-
1 file changed, 49 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
+++ b/drivers/gpu/drm/amd/powerplay/navi10_ppt.c
@@ -121,6 +121,8 @@ static struct smu_11_0_cmn2aisc_mapping
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),
+ MSG_MAP(GetVoltageByDpm, PPSMC_MSG_GetVoltageByDpm),
+ MSG_MAP(GetVoltageByDpmOverdrive, PPSMC_MSG_GetVoltageByDpmOverdrive),
};

static struct smu_11_0_cmn2aisc_mapping navi10_clk_map[SMU_CLK_COUNT] = {
@@ -1782,6 +1784,28 @@ static int navi10_od_setting_check_range
return 0;
}

+static int navi10_overdrive_get_gfx_clk_base_voltage(struct smu_context *smu,
+ uint16_t *voltage,
+ uint32_t freq)
+{
+ uint32_t param = (freq & 0xFFFF) | (PPCLK_GFXCLK << 16);
+ uint32_t value = 0;
+ int ret;
+
+ ret = smu_send_smc_msg_with_param(smu,
+ SMU_MSG_GetVoltageByDpm,
+ param);
+ if (ret) {
+ pr_err("[GetBaseVoltage] failed to get GFXCLK AVFS voltage from SMU!");
+ return ret;
+ }
+
+ smu_read_smc_arg(smu, &value);
+ *voltage = (uint16_t)value;
+
+ return 0;
+}
+
static int navi10_setup_od_limits(struct smu_context *smu) {
struct smu_11_0_overdrive_table *overdrive_table = NULL;
struct smu_11_0_powerplay_table *powerplay_table = NULL;
@@ -1808,16 +1832,40 @@ static int navi10_set_default_od_setting
if (ret)
return ret;

+ od_table = (OverDriveTable_t *)smu->smu_table.overdrive_table;
if (initialize) {
ret = navi10_setup_od_limits(smu);
if (ret) {
pr_err("Failed to retrieve board OD limits\n");
return ret;
}
+ if (od_table) {
+ if (!od_table->GfxclkVolt1) {
+ ret = navi10_overdrive_get_gfx_clk_base_voltage(smu,
+ &od_table->GfxclkVolt1,
+ od_table->GfxclkFreq1);
+ if (ret)
+ od_table->GfxclkVolt1 = 0;
+ }
+
+ if (!od_table->GfxclkVolt2) {
+ ret = navi10_overdrive_get_gfx_clk_base_voltage(smu,
+ &od_table->GfxclkVolt2,
+ od_table->GfxclkFreq2);
+ if (ret)
+ od_table->GfxclkVolt2 = 0;
+ }

+ if (!od_table->GfxclkVolt3) {
+ ret = navi10_overdrive_get_gfx_clk_base_voltage(smu,
+ &od_table->GfxclkVolt3,
+ od_table->GfxclkFreq3);
+ if (ret)
+ od_table->GfxclkVolt3 = 0;
+ }
+ }
}

- od_table = (OverDriveTable_t *)smu->smu_table.overdrive_table;
if (od_table) {
navi10_dump_od_table(od_table);
}