linux-kernel - Re: [PATCH v2 8/9] drm/panfrost: Add Mali-G57 "Natt" support

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Date:   Thu, 26 May 2022 09:49:13 +0100
From:   Steven Price <steven.price@....com>
To:     Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>,
        dri-devel@...ts.freedesktop.org
Cc:     Rob Herring <robh@...nel.org>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Nícolas F . R . A . Prado 
        <nfraprado@...labora.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 8/9] drm/panfrost: Add Mali-G57 "Natt" support

On 25/05/2022 15:57, Alyssa Rosenzweig wrote:
> Add the features, issues, and GPU ID for Mali-G57, a first-generation
> Valhall GPU. Other first- and second-generation Valhall GPUs should be
> similar.
> 
> v2: Split out issue list for r0p0 from newer Natt GPUs, as TTRX_3485 was
> fixed in r0p1. Unfortunately, MT8192 has a r0p0, so we do need to handle
> TTRX_3485.
> 
> Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>
> ---
>  drivers/gpu/drm/panfrost/panfrost_features.h | 12 ++++++++++++
>  drivers/gpu/drm/panfrost/panfrost_gpu.c      |  3 +++
>  drivers/gpu/drm/panfrost/panfrost_issues.h   |  9 +++++++++
>  3 files changed, 24 insertions(+)
> 
> diff --git a/drivers/gpu/drm/panfrost/panfrost_features.h b/drivers/gpu/drm/panfrost/panfrost_features.h
> index 1a8bdebc86a3..7ed0cd3ea2d4 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_features.h
> +++ b/drivers/gpu/drm/panfrost/panfrost_features.h
> @@ -106,6 +106,18 @@ enum panfrost_hw_feature {
>  	BIT_ULL(HW_FEATURE_TLS_HASHING) | \
>  	BIT_ULL(HW_FEATURE_3BIT_EXT_RW_L2_MMU_CONFIG))
>  
> +#define hw_features_g57 (\
> +	BIT_ULL(HW_FEATURE_JOBCHAIN_DISAMBIGUATION) | \
> +	BIT_ULL(HW_FEATURE_PWRON_DURING_PWROFF_TRANS) | \
> +	BIT_ULL(HW_FEATURE_XAFFINITY) | \
> +	BIT_ULL(HW_FEATURE_FLUSH_REDUCTION) | \
> +	BIT_ULL(HW_FEATURE_PROTECTED_MODE) | \
> +	BIT_ULL(HW_FEATURE_PROTECTED_DEBUG_MODE) | \
> +	BIT_ULL(HW_FEATURE_COHERENCY_REG) | \
> +	BIT_ULL(HW_FEATURE_AARCH64_MMU) | \
> +	BIT_ULL(HW_FEATURE_IDVS_GROUP_SIZE) | \
> +	BIT_ULL(HW_FEATURE_CLEAN_ONLY_SAFE))
> +
>  static inline bool panfrost_has_hw_feature(struct panfrost_device *pfdev,
>  					   enum panfrost_hw_feature feat)
>  {
> diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c b/drivers/gpu/drm/panfrost/panfrost_gpu.c
> index e1a6e763d0dc..6452e4e900dd 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_gpu.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_gpu.c
> @@ -201,6 +201,9 @@ static const struct panfrost_model gpu_models[] = {
>  	GPU_MODEL(g52, 0x7002),
>  	GPU_MODEL(g31, 0x7003,
>  		GPU_REV(g31, 1, 0)),
> +
> +	GPU_MODEL(g57, 0x9001,
> +		GPU_REV(g57, 0, 0)),
>  };
>  
>  static void panfrost_gpu_init_features(struct panfrost_device *pfdev)
> diff --git a/drivers/gpu/drm/panfrost/panfrost_issues.h b/drivers/gpu/drm/panfrost/panfrost_issues.h
> index 4d41e0a13867..c5fa9e897a35 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_issues.h
> +++ b/drivers/gpu/drm/panfrost/panfrost_issues.h
> @@ -258,6 +258,15 @@ enum panfrost_hw_issue {
>  
>  #define hw_issues_g76 0
>  
> +#define hw_issues_g57 (\
> +	BIT_ULL(HW_ISSUE_TTRX_2968_TTRX_3162) | \
> +	BIT_ULL(HW_ISSUE_TTRX_3076))
> +
> +#define hw_issues_g57_r0p0 (\
> +	BIT_ULL(HW_ISSUE_TTRX_2968_TTRX_3162) | \
> +	BIT_ULL(HW_ISSUE_TTRX_3076) | \
> +	BIT_ULL(HW_ISSUE_TTRX_3485))

There's no need to repeat the issues that are generic for g57 in the
r0p0 list. So this can be simplified to:

 #define hw_issues_g57_r0p0 (\
 	BIT_ULL(HW_ISSUE_TTRX_3485))

With that fixed:

Reviewed-by: Steven Price <steven.price@....com>

> +
>  static inline bool panfrost_has_hw_issue(const struct panfrost_device *pfdev,
>  					 enum panfrost_hw_issue issue)
>  {