linux-kernel - Re: [PATCH v5 5/6] drm/msm/dsi: set VIDEO_COMPRESSION_MODE_CTRL

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Date: Tue, 28 May 2024 15:12:34 -0700
From: Jessica Zhang <quic_jesszhan@...cinc.com>
To: Jun Nie <jun.nie@...aro.org>, Rob Clark <robdclark@...il.com>,
        "Abhinav
 Kumar" <quic_abhinavk@...cinc.com>,
        Dmitry Baryshkov
	<dmitry.baryshkov@...aro.org>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten
	<marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>, "Daniel
 Vetter" <daniel@...ll.ch>,
        Vinod Koul <vkoul@...nel.org>
CC: <linux-arm-msm@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>,
        "Jonathan
 Marek" <jonathan@...ek.ca>
Subject: Re: [PATCH v5 5/6] drm/msm/dsi: set VIDEO_COMPRESSION_MODE_CTRL_WC



On 5/27/2024 7:21 AM, Jun Nie wrote:
> From: Jonathan Marek <jonathan@...ek.ca>
> 
> Video mode DSC won't work if this field is not set correctly. Set it to fix
> video mode DSC (for slice_per_pkt==1 cases at least).
> 
> Fixes: 08802f515c3c ("drm/msm/dsi: Add support for DSC configuration")
> Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Signed-off-by: Jun Nie <jun.nie@...aro.org>

Hi Jun,

Reviewed-by: Jessica Zhang <quic_jesszhan@...cinc.com>

Thanks,

Jessica Zhang

> ---
>   drivers/gpu/drm/msm/dsi/dsi_host.c | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
> index 47f5858334f6..7252d36687e6 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_host.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
> @@ -857,6 +857,7 @@ static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mod
>   	u32 slice_per_intf, total_bytes_per_intf;
>   	u32 pkt_per_line;
>   	u32 eol_byte_num;
> +	u32 bytes_per_pkt;
>   
>   	/* first calculate dsc parameters and then program
>   	 * compress mode registers
> @@ -864,6 +865,7 @@ static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mod
>   	slice_per_intf = msm_dsc_get_slices_per_intf(dsc, hdisplay);
>   
>   	total_bytes_per_intf = dsc->slice_chunk_size * slice_per_intf;
> +	bytes_per_pkt = dsc->slice_chunk_size; /* * slice_per_pkt; */
>   
>   	eol_byte_num = total_bytes_per_intf % 3;
>   
> @@ -901,6 +903,7 @@ static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mod
>   		dsi_write(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL, reg_ctrl);
>   		dsi_write(msm_host, REG_DSI_COMMAND_COMPRESSION_MODE_CTRL2, reg_ctrl2);
>   	} else {
> +		reg |= DSI_VIDEO_COMPRESSION_MODE_CTRL_WC(bytes_per_pkt);
>   		dsi_write(msm_host, REG_DSI_VIDEO_COMPRESSION_MODE_CTRL, reg);
>   	}
>   }
> 
> -- 
> 2.34.1
>