AMD polaris GPUs have an issue about audio noise on RKL platform,
they provide a commit to fix but for SMU7-based GPU still
need another module parameter,
For avoiding the module parameter, switch PCI_DPM by determining
intel platform in amd drm driver.
Fixes: 1a31474cdb48 ("drm/amd/pm: workaround for audio noise issue")
Ref: https://lists.freedesktop.org/archives/amd-gfx/2021-August/067413.html
Signed-off-by: Koba Ko <koba.ko@xxxxxxxxxxxxx>
---
.../drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c | 21 ++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c
index 0541bfc81c1b..346110dd0f51 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/smu7_hwmgr.c
@@ -1733,6 +1733,25 @@ static int smu7_disable_dpm_tasks(struct pp_hwmgr *hwmgr)
return result;
}
+#include <drm/intel_pch.h>
+
+static bool intel_tgp_chk(void)
+{
+ struct pci_dev *pch = NULL;
+ unsigned short id;
+
+ while ((pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, pch))) {
+ if (pch->vendor != PCI_VENDOR_ID_INTEL)
+ continue;
+
+ id = pch->device & INTEL_PCH_DEVICE_ID_MASK;
+ if (id == INTEL_PCH_TGP_DEVICE_ID_TYPE || INTEL_PCH_TGP2_DEVICE_ID_TYPE)
+ return true;
+ }
+
+ return false;
+}
+
static void smu7_init_dpm_defaults(struct pp_hwmgr *hwmgr)
{
struct smu7_hwmgr *data = (struct smu7_hwmgr *)(hwmgr->backend);
@@ -1758,7 +1777,7 @@ static void smu7_init_dpm_defaults(struct pp_hwmgr *hwmgr)
data->mclk_dpm_key_disabled = hwmgr->feature_mask & PP_MCLK_DPM_MASK ? false : true;
data->sclk_dpm_key_disabled = hwmgr->feature_mask & PP_SCLK_DPM_MASK ? false : true;
- data->pcie_dpm_key_disabled = hwmgr->feature_mask & PP_PCIE_DPM_MASK ? false : true;
+ data->pcie_dpm_key_disabled = intel_tgp_chk() || !(hwmgr->feature_mask & PP_PCIE_DPM_MASK);
/* need to set voltage control types before EVV patching */
data->voltage_control = SMU7_VOLTAGE_CONTROL_NONE;
data->vddci_control = SMU7_VOLTAGE_CONTROL_NONE;
--
2.25.1
