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SubjectRe: [PATCH v3 13/13] drm/msm/dsi: Pass DSC params to drm_panel
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On 16/11/2021 09:22, Vinod Koul wrote:
> When DSC is enabled, we need to pass the DSC parameters to panel driver
> as well, so add a dsc parameter in panel and set it when DSC is enabled

Nit: I think patch description is a bit inaccurate, since we pass DSC
parameters from panel to DSI host rather than other way around.

>
> Signed-off-by: Vinod Koul <vkoul@kernel.org>
> ---
> drivers/gpu/drm/msm/dsi/dsi_host.c | 16 +++++++++++++++-
> include/drm/drm_panel.h | 7 +++++++
> 2 files changed, 22 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
> index 2c14c36f0b3d..3d5773fcf496 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_host.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
> @@ -2159,11 +2159,25 @@ int msm_dsi_host_modeset_init(struct mipi_dsi_host *host,
> struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
> const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
> struct msm_drm_private *priv;
> + struct drm_panel *panel;
> int ret;
>
> msm_host->dev = dev;
> + panel = msm_dsi_host_get_panel(&msm_host->base);
> priv = dev->dev_private;
> - priv->dsc = msm_host->dsc;
> +
> + if (panel && panel->dsc) {
> + struct msm_display_dsc_config *dsc = priv->dsc;
> +
> + if (!dsc) {
> + dsc = kzalloc(sizeof(*dsc), GFP_KERNEL);
> + if (!dsc)
> + return -ENOMEM;
> + dsc->drm = panel->dsc;
> + priv->dsc = dsc;
> + msm_host->dsc = dsc;
> + }
> + }
>
> ret = cfg_hnd->ops->tx_buf_alloc(msm_host, SZ_4K);
> if (ret) {
> diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h
> index 4602f833eb51..eb8ae9bf32ed 100644
> --- a/include/drm/drm_panel.h
> +++ b/include/drm/drm_panel.h
> @@ -171,6 +171,13 @@ struct drm_panel {
> * Panel entry in registry.
> */
> struct list_head list;
> +
> + /**
> + * @dsc:
> + *
> + * Panel DSC pps payload to be sent
> + */
> + struct drm_dsc_config *dsc;
> };
>
> void drm_panel_init(struct drm_panel *panel, struct device *dev,
>


--
With best wishes
Dmitry

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