[PATCH v11 8/9] drm/msm/dsi: Use MSM and DRM DSC helper methods

[Marijn Suijten]

On 2023-05-17 11:51:17, Jessica Zhang wrote:
> 
> Use MSM and DRM DSC helper methods to configure DSC for DSI.
> 
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
> Reviewed-by: Marijn Suijten <marijn.suijten at somainline.org>
> Signed-off-by: Jessica Zhang <quic_jesszhan at quicinc.com>
> ---
>  drivers/gpu/drm/msm/dsi/dsi_host.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
> index 74d38f90398a..b21108948061 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_host.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
> @@ -28,6 +28,7 @@
>  #include "dsi.xml.h"
>  #include "sfpb.xml.h"
>  #include "dsi_cfg.h"
> +#include "msm_dsc_helper.h"
>  #include "msm_kms.h"
>  #include "msm_gem.h"
>  #include "phy/dsi_phy.h"
> @@ -848,7 +849,7 @@ static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mod
>  	/* first calculate dsc parameters and then program
>  	 * compress mode registers
>  	 */
> -	slice_per_intf = DIV_ROUND_UP(hdisplay, dsc->slice_width);
> +	slice_per_intf = msm_dsc_get_slices_per_intf(dsc, hdisplay);
>  
>  	/*
>  	 * If slice_count is greater than slice_per_intf
> @@ -858,7 +859,7 @@ static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mod
>  	if (dsc->slice_count > slice_per_intf)
>  		dsc->slice_count = 1;
>  
> -	total_bytes_per_intf = dsc->slice_chunk_size * slice_per_intf;
> +	total_bytes_per_intf = dsc->slice_count * slice_per_intf;

Oh no, this line shouldn't have changed.  Besides not conforming to the
"use MSM and DRM DSC helper methods" title, this is now no longer
computing the bytes that we were in v10.  Was this tested?

- Marijn

>  
>  	eol_byte_num = total_bytes_per_intf % 3;
>  	pkt_per_line = slice_per_intf / dsc->slice_count;
> @@ -1759,7 +1760,7 @@ static int dsi_populate_dsc_params(struct msm_dsi_host *msm_host, struct drm_dsc
>  		return ret;
>  	}
>  
> -	dsc->initial_scale_value = 32;
> +	dsc->initial_scale_value = drm_dsc_initial_scale_value(dsc);
>  	dsc->line_buf_depth = dsc->bits_per_component + 1;
>  
>  	return drm_dsc_compute_rc_parameters(dsc);
> 
> -- 
> 2.40.1
>