linux-kernel - Re: [Freedreno] [REPOST PATCH v4 06/13] drm/msm/disp/dpu1: Add DSC support in hw

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Date:   Wed, 16 Feb 2022 11:52:03 -0800
From:   Abhinav Kumar <quic_abhinavk@...cinc.com>
To:     Vinod Koul <vkoul@...nel.org>, Rob Clark <robdclark@...il.com>
CC:     Jonathan Marek <jonathan@...ek.ca>,
        David Airlie <airlied@...ux.ie>,
        <linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        "Abhinav Kumar" <abhinavk@...eaurora.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        <dri-devel@...ts.freedesktop.org>,
        "Daniel Vetter" <daniel@...ll.ch>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        <freedreno@...ts.freedesktop.org>
Subject: Re: [Freedreno] [REPOST PATCH v4 06/13] drm/msm/disp/dpu1: Add DSC
 support in hw_ctl



On 2/10/2022 2:34 AM, Vinod Koul wrote:
> Later gens of hardware have DSC bits moved to hw_ctl, so configure these
> bits so that DSC would work there as well
> 
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Signed-off-by: Vinod Koul <vkoul@...nel.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
> ---
>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c | 11 ++++++++++-
>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h |  2 ++
>   2 files changed, 12 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
> index 02da9ecf71f1..49659165cea8 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
> @@ -25,6 +25,8 @@
>   #define   CTL_MERGE_3D_ACTIVE           0x0E4
>   #define   CTL_INTF_ACTIVE               0x0F4
>   #define   CTL_MERGE_3D_FLUSH            0x100
> +#define   CTL_DSC_ACTIVE                0x0E8
> +#define   CTL_DSC_FLUSH                0x104
>   #define   CTL_INTF_FLUSH                0x110
>   #define   CTL_INTF_MASTER               0x134
>   #define   CTL_FETCH_PIPE_ACTIVE         0x0FC
> @@ -34,6 +36,7 @@
>   
>   #define DPU_REG_RESET_TIMEOUT_US        2000
>   #define  MERGE_3D_IDX   23
> +#define  DSC_IDX        22
>   #define  INTF_IDX       31
>   #define CTL_INVALID_BIT                 0xffff
>   #define CTL_DEFAULT_GROUP_ID		0xf
> @@ -121,7 +124,6 @@ static u32 dpu_hw_ctl_get_pending_flush(struct dpu_hw_ctl *ctx)
>   
>   static inline void dpu_hw_ctl_trigger_flush_v1(struct dpu_hw_ctl *ctx)
>   {
> -
>   	if (ctx->pending_flush_mask & BIT(MERGE_3D_IDX))
>   		DPU_REG_WRITE(&ctx->hw, CTL_MERGE_3D_FLUSH,
>   				ctx->pending_merge_3d_flush_mask);
> @@ -506,6 +508,9 @@ static void dpu_hw_ctl_intf_cfg_v1(struct dpu_hw_ctl *ctx,
>   	if ((test_bit(DPU_CTL_VM_CFG, &ctx->caps->features)))
>   		mode_sel = CTL_DEFAULT_GROUP_ID  << 28;
>   
> +	if (cfg->dsc)
> +		DPU_REG_WRITE(&ctx->hw, CTL_DSC_FLUSH, cfg->dsc);
> +
>   	if (cfg->intf_mode_sel == DPU_CTL_MODE_SEL_CMD)
>   		mode_sel |= BIT(17);
>   
> @@ -517,6 +522,10 @@ static void dpu_hw_ctl_intf_cfg_v1(struct dpu_hw_ctl *ctx,
>   	if (cfg->merge_3d)
>   		DPU_REG_WRITE(c, CTL_MERGE_3D_ACTIVE,
>   			      BIT(cfg->merge_3d - MERGE_3D_0));
> +	if (cfg->dsc) {
> +		DPU_REG_WRITE(&ctx->hw, CTL_FLUSH, cfg->dsc);
> +		DPU_REG_WRITE(c, CTL_DSC_ACTIVE, cfg->dsc);
> +	}
>   }
>   
>   static void dpu_hw_ctl_intf_cfg(struct dpu_hw_ctl *ctx,
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h
> index 806c171e5df2..9847c9c46d6f 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h
> @@ -40,6 +40,7 @@ struct dpu_hw_stage_cfg {
>    * @merge_3d:              3d merge block used
>    * @intf_mode_sel:         Interface mode, cmd / vid
>    * @stream_sel:            Stream selection for multi-stream interfaces
> + * @dsc:                   DSC BIT masks
>    */
>   struct dpu_hw_intf_cfg {
>   	enum dpu_intf intf;
> @@ -47,6 +48,7 @@ struct dpu_hw_intf_cfg {
>   	enum dpu_merge_3d merge_3d;
>   	enum dpu_ctl_mode_sel intf_mode_sel;
>   	int stream_sel;
> +	unsigned int dsc;
>   };
>   
>   /**