Re: [PATCH v5 02/13] drm/msm/dsi: Pass DSC params to drm_panel

Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> · Fri, 25 Mar 2022 15:24:41 +0300

On 25/03/2022 14:05, Vinod Koul wrote:
When DSC is enabled, we need to get the DSC parameters from the panel
driver, so add a dsc parameter in panel to fetch and pass DSC
configuration for DSI panels to DPU encoder, which will enable and
then configure DSC hardware blocks accordingly.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Reviewed-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
---
  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;

struct msm_display_info was moved from msm_drv.h to dpu_encoder.h.

Please rebase your patches on top of msm/msm-next branch

@@ -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,


--
With best wishes
Dmitry






