drm/msm/dpu: rework vsync_source handling

The struct msm_display_info has is_te_using_watchdog_timer field which
is neither set anywhere nor is flexible enough to specify different
sources. Replace it with the field specifying the vsync source using
enum dpu_vsync_source.

Reviewed-by: Abhinav Kumar <[e-mail]>
Signed-off-by: Dmitry Baryshkov <[e-mail]>
Reviewed-by: Marijn Suijten <[e-mail]>
Patchwork: https://patchwork.freedesktop.org/patch/598738/
Link: https://lore.kernel.org/r/[e-mail]

drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c

···
 		vsync_cfg.pp_count = dpu_enc->num_phys_encs;
 		vsync_cfg.frame_rate = drm_mode_vrefresh(&dpu_enc->base.crtc->state->adjusted_mode);
 
-		if (disp_info->is_te_using_watchdog_timer)
-			vsync_cfg.vsync_source = DPU_VSYNC_SOURCE_WD_TIMER_0;
-		else
-			vsync_cfg.vsync_source = DPU_VSYNC_SOURCE_GPIO_0;
+		vsync_cfg.vsync_source = disp_info->vsync_source;
 
 		hw_mdptop->ops.setup_vsync_source(hw_mdptop, &vsync_cfg);
 

drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.h

···
  * @h_tile_instance:    Controller instance used per tile. Number of elements is
  *                      based on num_of_h_tiles
  * @is_cmd_mode		Boolean to indicate if the CMD mode is requested
- * @is_te_using_watchdog_timer:  Boolean to indicate watchdog TE is
- *				 used instead of panel TE in cmd mode panels
+ * @vsync_source:	Source of the TE signal for DSI CMD devices
  */
 struct msm_display_info {
 	enum dpu_intf_type intf_type;
 	uint32_t num_of_h_tiles;
 	uint32_t h_tile_instance[MAX_H_TILES_PER_DISPLAY];
 	bool is_cmd_mode;
-	bool is_te_using_watchdog_timer;
+	enum dpu_vsync_source vsync_source;
 };
 
 /**

drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c

···
 
 		info.is_cmd_mode = msm_dsi_is_cmd_mode(priv->dsi[i]);
 
+		info.vsync_source = DPU_VSYNC_SOURCE_GPIO_0;
+
 		encoder = dpu_encoder_init(dev, DRM_MODE_ENCODER_DSI, &info);
 		if (IS_ERR(encoder)) {
 			DPU_ERROR("encoder init failed for dsi display\n");