Re: [REPOST PATCH v4 02/13] drm/msm/dsi: Pass DSC params to drm_panel

Abhinav Kumar
2022-02-17T00:27:13Z

On 2/10/2022 2:34 AM, 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
>
> Also, fetch and pass DSC configuration for DSI panels to DPU encoder,
> which will enable and configure DSC hardware blocks accordingly.
>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> Signed-off-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
> ---
> drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 2 ++
> drivers/gpu/drm/msm/dsi/dsi.c | 5 +++++
> drivers/gpu/drm/msm/dsi/dsi.h | 1 +
> drivers/gpu/drm/msm/dsi/dsi_host.c | 22 ++++++++++++++++++++++
> drivers/gpu/drm/msm/msm_drv.h | 8 ++++++++
> include/drm/drm_panel.h | 7 +++++++
> 6 files changed, 45 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> index 47fe11a84a77..ef6ddac22767 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> @@ -578,6 +578,8 @@ static int _dpu_kms_initialize_dsi(struct drm_device *dev,
> MSM_DISPLAY_CAP_CMD_MODE :
> MSM_DISPLAY_CAP_VID_MODE;
>
> + info.dsc = msm_dsi_get_dsc_config(priv->dsi[i]);
> +
> if (msm_dsi_is_bonded_dsi(priv->dsi[i]) && priv->dsi[other]) {
> rc = msm_dsi_modeset_init(priv->dsi[other], dev, encoder);
> if (rc) {
> diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c
> index 052548883d27..3aeac15e7421 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi.c
> @@ -20,6 +20,11 @@ bool msm_dsi_is_cmd_mode(struct msm_dsi *msm_dsi)
> return !(host_flags & MIPI_DSI_MODE_VIDEO);
> }
>
> +struct msm_display_dsc_config *msm_dsi_get_dsc_config(struct msm_dsi *msm_dsi)
> +{
> + return msm_dsi_host_get_dsc_config(msm_dsi->host);
> +}
> +
> static int dsi_get_phy(struct msm_dsi *msm_dsi)
> {
> struct platform_device *pdev = msm_dsi->pdev;
> diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h
> index c8dedc95428c..16cd9b2fce86 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi.h
> +++ b/drivers/gpu/drm/msm/dsi/dsi.h
> @@ -152,6 +152,7 @@ int dsi_calc_clk_rate_v2(struct msm_dsi_host *msm_host, bool is_bonded_dsi);
> int dsi_calc_clk_rate_6g(struct msm_dsi_host *msm_host, bool is_bonded_dsi);
> void msm_dsi_host_snapshot(struct msm_disp_state *disp_state, struct mipi_dsi_host *host);
> void msm_dsi_host_test_pattern_en(struct mipi_dsi_host *host);
> +struct msm_display_dsc_config *msm_dsi_host_get_dsc_config(struct mipi_dsi_host *host);
>
> /* dsi phy */
> struct msm_dsi_phy;
> diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
> index 27553194f9fa..7e9913eff724 100644
> --- a/drivers/gpu/drm/msm/dsi/dsi_host.c
> +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
> @@ -2059,9 +2059,24 @@ 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 drm_panel *panel;
> int ret;
>
> msm_host->dev = dev;
> + panel = msm_dsi_host_get_panel(&msm_host->base);
> +
> + if (panel && panel->dsc) {
> + struct msm_display_dsc_config *dsc = msm_host->dsc;
> +
> + if (!dsc) {
> + dsc = devm_kzalloc(&msm_host->pdev->dev, sizeof(*dsc), GFP_KERNEL);
> + if (!dsc)
> + return -ENOMEM;
> + dsc->drm = panel->dsc;
> + msm_host->dsc = dsc;
> + }
> + }
> +
> ret = cfg_hnd->ops->tx_buf_alloc(msm_host, SZ_4K);
> if (ret) {
> pr_err("%s: alloc tx gem obj failed, %d\n", __func__, ret);
> @@ -2626,3 +2641,10 @@ void msm_dsi_host_test_pattern_en(struct mipi_dsi_host *host)
> dsi_write(msm_host, REG_DSI_TEST_PATTERN_GEN_CMD_STREAM0_TRIGGER,
> DSI_TEST_PATTERN_GEN_CMD_STREAM0_TRIGGER_SW_TRIGGER);
> }
> +
> +struct msm_display_dsc_config *msm_dsi_host_get_dsc_config(struct mipi_dsi_host *host)
> +{
> + struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
> +
> + return msm_host->dsc;
> +}
> diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
> index 384f9bad4760..e7a312edfe67 100644
> --- a/drivers/gpu/drm/msm/msm_drv.h
> +++ b/drivers/gpu/drm/msm/msm_drv.h
> @@ -119,6 +119,7 @@ struct msm_display_topology {
> * based on num_of_h_tiles
> * @is_te_using_watchdog_timer: Boolean to indicate watchdog TE is
> * used instead of panel TE in cmd mode panels
> + * @dsc: DSC configuration data for DSC-enabled displays
> */
> struct msm_display_info {
> int intf_type;
> @@ -126,6 +127,7 @@ struct msm_display_info {
> uint32_t num_of_h_tiles;
> uint32_t h_tile_instance[MAX_H_TILES_PER_DISPLAY];
> bool is_te_using_watchdog_timer;
> + struct msm_display_dsc_config *dsc;
> };
>
> /* Commit/Event thread specific structure */
> @@ -365,6 +367,7 @@ void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi
> bool msm_dsi_is_cmd_mode(struct msm_dsi *msm_dsi);
> bool msm_dsi_is_bonded_dsi(struct msm_dsi *msm_dsi);
> bool msm_dsi_is_master_dsi(struct msm_dsi *msm_dsi);
> +struct msm_display_dsc_config *msm_dsi_get_dsc_config(struct msm_dsi *msm_dsi);
> #else
> static inline void __init msm_dsi_register(void)
> {
> @@ -393,6 +396,11 @@ static inline bool msm_dsi_is_master_dsi(struct msm_dsi *msm_dsi)
> {
> return false;
> }
> +
> +static inline struct msm_display_dsc_config *msm_dsi_get_dsc_config(struct msm_dsi *msm_dsi)
> +{
> + return NULL;
> +}
> #endif
>
> #ifdef CONFIG_DRM_MSM_DP
> 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,