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authorMario Limonciello <mario.limonciello@amd.com>2024-12-10 20:44:14 -0600
committerAlex Deucher <alexander.deucher@amd.com>2024-12-18 15:20:06 -0500
commita7f9d98eb1202132014ba760c26ad8608ffc9caf (patch)
tree9448b78b0b2d47eb3decfd11c5f83c6a89a35125 /drivers
parent85230ee36d88e7a09fb062d43203035659dd10a5 (diff)
downloadlwn-a7f9d98eb1202132014ba760c26ad8608ffc9caf.tar.gz
lwn-a7f9d98eb1202132014ba760c26ad8608ffc9caf.zip
drm/amd: Update strapping for NBIO 2.5.0
This helps to avoid a spurious PME event on hotplug to Azalia. Cc: Vijendar Mukunda <Vijendar.Mukunda@amd.com> Reported-and-tested-by: ionut_n2001@yahoo.com Closes: https://bugzilla.kernel.org/show_bug.cgi?id=215884 Tested-by: Gabriel Marcano <gabemarcano@yahoo.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Link: https://lore.kernel.org/r/20241211024414.7840-1-mario.limonciello@amd.com Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com> (cherry picked from commit 3f6f237b9dd189e1fb85b8a3f7c97a8f27c1e49a) Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/amd/amdgpu/nbio_v7_0.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/nbio_v7_0.c b/drivers/gpu/drm/amd/amdgpu/nbio_v7_0.c
index b1b57dcc5a73..49e953f86ced 100644
--- a/drivers/gpu/drm/amd/amdgpu/nbio_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/nbio_v7_0.c
@@ -271,8 +271,19 @@ const struct nbio_hdp_flush_reg nbio_v7_0_hdp_flush_reg = {
.ref_and_mask_sdma1 = GPU_HDP_FLUSH_DONE__SDMA1_MASK,
};
+#define regRCC_DEV0_EPF6_STRAP4 0xd304
+#define regRCC_DEV0_EPF6_STRAP4_BASE_IDX 5
+
static void nbio_v7_0_init_registers(struct amdgpu_device *adev)
{
+ uint32_t data;
+
+ switch (adev->ip_versions[NBIO_HWIP][0]) {
+ case IP_VERSION(2, 5, 0):
+ data = RREG32_SOC15(NBIO, 0, regRCC_DEV0_EPF6_STRAP4) & ~BIT(23);
+ WREG32_SOC15(NBIO, 0, regRCC_DEV0_EPF6_STRAP4, data);
+ break;
+ }
}
#define MMIO_REG_HOLE_OFFSET (0x80000 - PAGE_SIZE)