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.barysh...@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhin...@quicinc.com>
Signed-off-by: Vinod Koul <vk...@kernel.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h |  2 ++
 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               |  6 ++++++
 include/drm/drm_panel.h                     |  7 +++++++
 7 files changed, 45 insertions(+)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h 
b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
index 42db6ce12caf..ef873e5285a0 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h
@@ -27,6 +27,7 @@
  *                      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;
@@ -34,6 +35,7 @@ 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;
 };
 
 /**
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c 
b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index e29796c4f27b..e64154407425 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -582,6 +582,8 @@ 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 c12e66aa42a3..06a76834be52 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.c
+++ b/drivers/gpu/drm/msm/dsi/dsi.c
@@ -21,6 +21,11 @@ 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 4a8a9b31ce1d..cb2e179127ea 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -2061,9 +2061,24 @@ 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);
@@ -2628,3 +2643,10 @@ 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 57aee75f5022..2a3280df7b12 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -336,6 +336,7 @@ 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)
 {
@@ -364,6 +365,11 @@ 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,
-- 
2.34.1

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