On 9/20/26 1:08 PM, Dmitry Baryshkov wrote:
> Only a530/a540 have a GPMU. On the other a5xx parts, reading the
> 0xa800-0xac60 GPMU aperture during a crashdump resets the board -- on
> sda660 (a512) a GPU hang thus reboots the SoC instead of recovering.
>
> Split the GPMU block into its own array and collect it only when a GPMU
> is present.
>
> Fixes: e20c9284c8f2 ("drm/msm/adreno: Add support for Adreno 510 GPU")
> Assisted-by: LLM
> Signed-off-by: Dmitry Baryshkov <[email protected]>
> ---
> drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 49
> ++++++++++++++++++++++++++++++++---
> 1 file changed, 46 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
> b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
> index 5d96b8f63156..3974aaf6fd33 100644
> --- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
> @@ -1337,9 +1337,14 @@ static const u32 a5xx_registers[] = {
> 0xE800, 0xE806, 0xE810, 0xE89A, 0xE8A0, 0xE8A4, 0xE8AA, 0xE8EB,
> 0xE900, 0xE905, 0xEB80, 0xEB8F, 0xEBB0, 0xEBB0, 0xEC00, 0xEC05,
> 0xEC08, 0xECE9, 0xECF0, 0xECF0, 0xEA80, 0xEA80, 0xEA82, 0xEAA3,
> - 0xEAA5, 0xEAC2, 0xA800, 0xA800, 0xA820, 0xA828, 0xA840, 0xA87D,
> - 0XA880, 0xA88D, 0xA890, 0xA8A3, 0xA8D0, 0xA8D8, 0xA8E0, 0xA8F5,
> - 0xAC60, 0xAC60, ~0,
> + 0xEAA5, 0xEAC2, ~0,
> +};
> +
> +/* GPMU registers, only valid on parts with a GPMU (a530/a540) */
> +static const u32 a5xx_gpmu_registers[] = {
> + 0xA800, 0xA800, 0xA820, 0xA828, 0xA840, 0xA87D, 0xA880, 0xA88D,
> + 0xA890, 0xA8A3, 0xA8D0, 0xA8D8, 0xA8E0, 0xA8F5, 0xAC60, 0xAC60,
> + ~0,
> };
I'm not sure if there are holes in these ranges in the hw, but msm-3.18
(8998 kernel) simply has:
0xA800-0xA8FF
and
0xAC60-0xAC60
(both ranges inclusive)
Konrad
