drm/radeon: implement pci config reset for evergreen/cayman (v2)
pci config reset is a low level reset that resets
the entire chip from the bus interface. It can
be more reliable if soft reset fails.
v2: put behind module parameter
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/ni.c b/drivers/gpu/drm/radeon/ni.c
index 05a9009..9f11a55 100644
--- a/drivers/gpu/drm/radeon/ni.c
+++ b/drivers/gpu/drm/radeon/ni.c
@@ -174,6 +174,7 @@
extern void evergreen_program_aspm(struct radeon_device *rdev);
extern void sumo_rlc_fini(struct radeon_device *rdev);
extern int sumo_rlc_init(struct radeon_device *rdev);
+extern void evergreen_gpu_pci_config_reset(struct radeon_device *rdev);
/* Firmware Names */
MODULE_FIRMWARE("radeon/BARTS_pfp.bin");
@@ -1878,8 +1879,10 @@
reset_mask = cayman_gpu_check_soft_reset(rdev);
- if (!reset_mask)
- r600_set_bios_scratch_engine_hung(rdev, false);
+ if (reset_mask)
+ evergreen_gpu_pci_config_reset(rdev);
+
+ r600_set_bios_scratch_engine_hung(rdev, false);
return 0;
}