[PATCH v2 2/8] drm/msm/dpu: enable PINGPONG TE operations only when supported by HW

[Marijn Suijten]

On 2023-07-30 03:35:12, Dmitry Baryshkov wrote:
> The DPU_PINGPONG_TE bit is set for all PINGPONG blocks on DPU < 5.0.
> Rather than checking for the flag, check for the presense of the
> corresponding interrupt line.
> 
> Reviewed-by: Marijn Suijten <marijn.suijten at somainline.org>

This patch changed significantly since the last submission, but it is
still to my liking so this r-b stays!

- Marijn

> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c | 6 ++++--
>  drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h | 3 ++-
>  drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c          | 2 +-
>  3 files changed, 7 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
> index 9298c166b213..057cac7f5d93 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.c
> @@ -282,7 +282,7 @@ static int dpu_hw_pp_setup_dsc(struct dpu_hw_pingpong *pp)
>  }
>  
>  struct dpu_hw_pingpong *dpu_hw_pingpong_init(const struct dpu_pingpong_cfg *cfg,
> -		void __iomem *addr)
> +		void __iomem *addr, const struct dpu_mdss_version *mdss_rev)
>  {
>  	struct dpu_hw_pingpong *c;
>  
> @@ -296,7 +296,9 @@ struct dpu_hw_pingpong *dpu_hw_pingpong_init(const struct dpu_pingpong_cfg *cfg,
>  	c->idx = cfg->id;
>  	c->caps = cfg;
>  
> -	if (test_bit(DPU_PINGPONG_TE, &cfg->features)) {
> +	if (mdss_rev->core_major_ver < 5) {
> +		WARN_ON(!cfg->intr_rdptr);
> +
>  		c->ops.enable_tearcheck = dpu_hw_pp_enable_te;
>  		c->ops.disable_tearcheck = dpu_hw_pp_disable_te;
>  		c->ops.connect_external_te = dpu_hw_pp_connect_external_te;
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h
> index d3246a9a5808..0d541ca5b056 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_pingpong.h
> @@ -123,10 +123,11 @@ static inline struct dpu_hw_pingpong *to_dpu_hw_pingpong(struct dpu_hw_blk *hw)
>   * pingpong catalog entry.
>   * @cfg:  Pingpong catalog entry for which driver object is required
>   * @addr: Mapped register io address of MDP
> + * @mdss_rev: dpu core's major and minor versions
>   * Return: Error code or allocated dpu_hw_pingpong context
>   */
>  struct dpu_hw_pingpong *dpu_hw_pingpong_init(const struct dpu_pingpong_cfg *cfg,
> -		void __iomem *addr);
> +		void __iomem *addr, const struct dpu_mdss_version *mdss_rev);
>  
>  /**
>   * dpu_hw_pingpong_destroy - destroys pingpong driver context
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
> index 4a53e2c931d6..9894eea77b5f 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
> @@ -145,7 +145,7 @@ int dpu_rm_init(struct dpu_rm *rm,
>  		struct dpu_hw_pingpong *hw;
>  		const struct dpu_pingpong_cfg *pp = &cat->pingpong[i];
>  
> -		hw = dpu_hw_pingpong_init(pp, mmio);
> +		hw = dpu_hw_pingpong_init(pp, mmio, cat->mdss_ver);
>  		if (IS_ERR(hw)) {
>  			rc = PTR_ERR(hw);
>  			DPU_ERROR("failed pingpong object creation: err %d\n",
> -- 
> 2.39.2
>