drm/msm/dpu: add missing dpu_encoder kerneldoc

Describe missing dpu_encoder_phys_wb_is_master() argument and struct
dpu_encoder_virt.wide_bus_en field.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/518794/
Link: https://lore.kernel.org/r/20230118020549.1690078-1-dmitry.baryshkov@linaro.orgSigned-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

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

@@ -162,6 +162,7 @@ enum dpu_enc_rc_states {
  * @vsync_event_work:		worker to handle vsync event for autorefresh
  * @topology:                   topology of the display
  * @idle_timeout:		idle timeout duration in milliseconds
+ * @wide_bus_en:		wide bus is enabled on this interface
  * @dsc:			drm_dsc_config pointer, for DSC-enabled encoders
  */
 struct dpu_encoder_virt {

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

@@ -26,6 +26,7 @@
 
 /**
  * dpu_encoder_phys_wb_is_master - report wb always as master encoder
+ * @phys_enc:	Pointer to physical encoder
  */
 static bool dpu_encoder_phys_wb_is_master(struct dpu_encoder_phys *phys_enc)
 {