Hi Greg,
On Mon, Oct 24, 2022 at 01:33:01PM +0200, Greg Kroah-Hartman wrote:
> From: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
>
> This reverts commit 9f55f36f749a7608eeef57d7d72991a9bd557341 which is
> commit e3163bc8ffdfdb405e10530b140135b2ee487f89 upstream.
>
> This commit causes repeated WARN_ONs from
>
> drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amd
> gpu_dm.c:7391 amdgpu_dm_atomic_commit_tail+0x23b9/0x2430 [amdgpu]
>
> dmesg fills up with the following messages and drm initialization takes
> a very long time.
>
> Cc: <stable@xxxxxxxxxxxxxxx> # 5.10
> Signed-off-by: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c | 5 -----
> drivers/gpu/drm/amd/amdgpu/soc15.c | 25 +++++++++++++++++++++++++
> 2 files changed, 25 insertions(+), 5 deletions(-)
>
> --- a/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
> +++ b/drivers/gpu/drm/amd/amdgpu/sdma_v4_0.c
> @@ -1475,11 +1475,6 @@ static int sdma_v4_0_start(struct amdgpu
> WREG32_SDMA(i, mmSDMA0_CNTL, temp);
>
> if (!amdgpu_sriov_vf(adev)) {
> - ring = &adev->sdma.instance[i].ring;
> - adev->nbio.funcs->sdma_doorbell_range(adev, i,
> - ring->use_doorbell, ring->doorbell_index,
> - adev->doorbell_index.sdma_doorbell_range);
> -
> /* unhalt engine */
> temp = RREG32_SDMA(i, mmSDMA0_F32_CNTL);
> temp = REG_SET_FIELD(temp, SDMA0_F32_CNTL, HALT, 0);
> --- a/drivers/gpu/drm/amd/amdgpu/soc15.c
> +++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
> @@ -1332,6 +1332,25 @@ static int soc15_common_sw_fini(void *ha
> return 0;
> }
>
> +static void soc15_doorbell_range_init(struct amdgpu_device *adev)
> +{
> + int i;
> + struct amdgpu_ring *ring;
> +
> + /* sdma/ih doorbell range are programed by hypervisor */
> + if (!amdgpu_sriov_vf(adev)) {
> + for (i = 0; i < adev->sdma.num_instances; i++) {
> + ring = &adev->sdma.instance[i].ring;
> + adev->nbio.funcs->sdma_doorbell_range(adev, i,
> + ring->use_doorbell, ring->doorbell_index,
> + adev->doorbell_index.sdma_doorbell_range);
> + }
> +
> + adev->nbio.funcs->ih_doorbell_range(adev, adev->irq.ih.use_doorbell,
> + adev->irq.ih.doorbell_index);
> + }
> +}
> +
> static int soc15_common_hw_init(void *handle)
> {
> struct amdgpu_device *adev = (struct amdgpu_device *)handle;
> @@ -1351,6 +1370,12 @@ static int soc15_common_hw_init(void *ha
>
> /* enable the doorbell aperture */
> soc15_enable_doorbell_aperture(adev, true);
> + /* HW doorbell routing policy: doorbell writing not
> + * in SDMA/IH/MM/ACV range will be routed to CP. So
> + * we need to init SDMA/IH/MM/ACV doorbell range prior
> + * to CP ip block init and ring test.
> + */
> + soc15_doorbell_range_init(adev);
>
> return 0;
> }
Can you please as well revert 7b0db849ea030a70b8fb9c9afec67c81f955482e
on top?
See https://lore.kernel.org/stable/BL1PR12MB5144F3CC640A18DF0C36E414F72E9@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/
Both of these reverts need to be applied to fix regressions which were
reported in https://gitlab.freedesktop.org/drm/amd/-/issues/2216 and
downstream in Debian (https://bugs.debian.org/1022025).
If it is now not anymore possible for 5.10.150 can you pick the revert
for 5.10.151?
Regards,
Salvatore
