On 2024-05-15 16:27:44, Marc Gonzalez wrote:
> 15 qcom platform DTSI files define an adreno_smmu node.
> msm8998 is the only one with adreno_smmu disabled by default.
>
> There's no reason why this SMMU should be disabled by default,
> it doesn't need any further configuration.
>
> Bring msm8998 in line with the 14 other platforms.
>
> This fixes GPU init failing with ENODEV:
Nit: I'd specialize this to:
"This saves every MSM8998 board DTS from having to enable adreno_smmu when
enabling the Adreno GPU node, which leads to the following unclear probe failure
when forgotten about:"
But no need to send a v3 for that.
> msm_dpu c901000.display-controller: failed to load adreno gpu
> msm_dpu c901000.display-controller: failed to bind 500.gpu (ops
> a3xx_ops): -19
And as a more general discussion, which is not really relevant to have your
commit message, we could have a separate patch adding an error message detailing
**where** this -19 came from. In this case create_address_space().
> Fixes: 87cd46d68aeac8 ("Configure Adreno GPU and related IOMMU")
> Signed-off-by: Marc Gonzalez
> Reviewed-by: Bryan O'Donoghue
Reviewed-by: Marijn Suijten
> ---
> New in v2: rewrote commit message with input from Martin, Bryan, Luca
Thanks!
> Supersedes: <1ba7031f-c97c-41f1-8cbc-d99f1e848...@freebox.fr>
>
> Maintainers, feel free to drop the Fixes tag.
For context, I don't think the original patch was necessarily wrong in disabling
this node, as any node using it (adreno_gpu) is also disabled by default. It is
however less consistent with other DTSI, which don't require every board DTS to
re-enable adreno_smmu.
- Marijn
> Failure log:
> [2.756363] [drm:adreno_bind] Found GPU: 5.4.0.1
> [2.767183] [drm:a5xx_gpu_init]
> [2.767422] [drm:adreno_gpu_init] fast_rate=71097, slow_rate=2700
> [3.003869] [drm:msm_gpu_init] ebi1_clk: fffe
> [3.004002] adreno 500.gpu: supply vdd not found, using dummy regulator
> [3.008463] [drm:msm_gpu_init] gpu_reg: 819e4000
> [3.015105] adreno 500.gpu: supply vddcx not found, using dummy
> regulator
> [3.020702] [drm:msm_gpu_init] gpu_cx: 819e4180
> [3.028173] [drm:adreno_iommu_create_address_space]
> [3.054552] [drm:msm_gpu_init] gpu->aspace=ffed
> [3.058112] [drm:a5xx_destroy] 5.4.0.1
> [3.065922] [drm:msm_gpu_cleanup] 5.4.0.1
> [3.074237] msm_dpu c901000.display-controller: failed to load adreno gpu
> [3.082412] msm_dpu c901000.display-controller: failed to bind 500.gpu
> (ops a3xx_ops): -19
> [3.088342] msm_dpu c901000.display-controller: [drm:drm_managed_release]
> drmres release begin
> ...
> [3.197694] [drm:drm_managed_release] drmres release end
> [3.204009] msm_dpu c901000.display-controller: adev bind failed: -19
> ---
> arch/arm64/boot/dts/qcom/msm8998.dtsi | 1 -
> 1 file changed, 1 deletion(-)
>
> diff --git a/arch/arm64/boot/dts/qcom/msm8998.dtsi
> b/arch/arm64/boot/dts/qcom/msm8998.dtsi
> index 3d3b1f61c0690..edf379c28e1e1 100644
> --- a/arch/arm64/boot/dts/qcom/msm8998.dtsi
> +++ b/arch/arm64/boot/dts/qcom/msm8998.dtsi
> @@ -1580,7 +1580,6 @@ adreno_smmu: iommu@504 {
>* SoC VDDMX RPM Power Domain in the Adreno driver.
>*/
> power-domains = <&gpucc GPU_GX_GDSC>;
> - status = "disabled";
> };
>
> gpucc: clock-controller@5065000 {
> --
> 2.34.1
>
