drm/msm/dsi: add dsi host helper functions support

Add dsi host helper functions support for DSI v2 and DSI 6G 1.x
controllers that are under version checks
Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

drivers/gpu/drm/msm/dsi/dsi.h

@@ -149,6 +149,7 @@ static inline int msm_dsi_pll_set_usecase(struct msm_dsi_pll *pll,
 #endif
 
 /* dsi host */
+struct msm_dsi_host;
 int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host,
 					const struct mipi_dsi_msg *msg);
 void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host,

drivers/gpu/drm/msm/dsi/dsi_cfg.h

@@ -40,10 +40,22 @@ struct msm_dsi_config {
 	const int num_dsi;
 };
 
+struct msm_dsi_host_cfg_ops {
+	int (*link_clk_enable)(struct msm_dsi_host *msm_host);
+	void (*link_clk_disable)(struct msm_dsi_host *msm_host);
+	int (*clk_init_ver)(struct msm_dsi_host *msm_host);
+	int (*tx_buf_alloc)(struct msm_dsi_host *msm_host, int size);
+	void* (*tx_buf_get)(struct msm_dsi_host *msm_host);
+	void (*tx_buf_put)(struct msm_dsi_host *msm_host);
+	int (*dma_base_get)(struct msm_dsi_host *msm_host, uint64_t *iova);
+	int (*calc_clk_rate)(struct msm_dsi_host *msm_host);
+};
+
 struct msm_dsi_cfg_handler {
 	u32 major;
 	u32 minor;
 	const struct msm_dsi_config *cfg;
+	const struct msm_dsi_host_cfg_ops *ops;
 };
 
 const struct msm_dsi_cfg_handler *msm_dsi_cfg_get(u32 major, u32 minor);