drm/amd/display: Clean up dcn10_optc.c kdoc

Fixes the following W=1 kernel build warning:

display/dc/dcn10/dcn10_optc.c:45: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
* apply_front_porch_workaround TODO FPGA still need?
display/dc/dcn10/dcn10_optc.c:136: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
* program_timing_generator used by mode timing set
display/dc/dcn10/dcn10_optc.c:391: warning: Function parameter or member 'optc' not described in 'optc1_set_timing_double_buffer'
display/dc/dcn10/dcn10_optc.c:391: warning: Function parameter or member 'enable' not described in 'optc1_set_timing_double_buffer'
display/dc/dcn10/dcn10_optc.c:404: warning: Function parameter or member 'optc' not described in 'optc1_unblank_crtc'
display/dc/dcn10/dcn10_optc.c:404: warning: expecting prototype for unblank_crtc(). Prototype was for optc1_unblank_crtc() instead
display/dc/dcn10/dcn10_optc.c:427: warning: Function parameter or member 'optc' not described in 'optc1_blank_crtc'
display/dc/dcn10/dcn10_optc.c:427: warning: expecting prototype for blank_crtc(). Prototype was for optc1_blank_crtc() instead
display/dc/dcn10/dcn10_optc.c:496: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
* Enable CRTC
display/dc/dcn10/dcn10_optc.c:895: warning: Cannot understand *****************************************************************************
on line 895 - I thought it was a doc line

Cc: Rodrigo Siqueira <[e-mail]>
Cc: Aurabindo Pillai <[e-mail]>
Cc: Harry Wentland <[e-mail]>
Signed-off-by: Srinivasan Shanmugam <[e-mail]>
Reviewed-by: Rodrigo Siqueira <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c

···
 #define STATIC_SCREEN_EVENT_MASK_RANGETIMING_DOUBLE_BUFFER_UPDATE_EN 0x100
 
 /**
-* apply_front_porch_workaround  TODO FPGA still need?
-*
-* This is a workaround for a bug that has existed since R5xx and has not been
-* fixed keep Front porch at minimum 2 for Interlaced mode or 1 for progressive.
-*/
+ * apply_front_porch_workaround() - This is a workaround for a bug that has
+ *                                  existed since R5xx and has not been fixed
+ *                                  keep Front porch at minimum 2 for Interlaced
+ *                                  mode or 1 for progressive.
+ *
+ * @timing: Timing parameters used to configure DCN blocks.
+ */
 static void apply_front_porch_workaround(struct dc_crtc_timing *timing)
 {
 	if (timing->flags.INTERLACE == 1) {
···
 }
 
 /**
- * program_timing_generator   used by mode timing set
- * Program CRTC Timing Registers - OTG_H_*, OTG_V_*, Pixel repetition.
- * Including SYNC. Call BIOS command table to program Timings.
+ * optc1_program_timing() - used by mode timing set Program
+ *                          CRTC Timing Registers - OTG_H_*,
+ *                          OTG_V_*, Pixel repetition.
+ *                          Including SYNC. Call BIOS command table to program Timings.
+ *
+ * @optc: timing_generator instance.
+ * @dc_crtc_timing: Timing parameters used to configure DCN blocks.
+ * @vready_offset: Vready's starting position.
+ * @vstartup_start: Vstartup period.
+ * @vupdate_offset: Vupdate starting position.
+ * @vupdate_width: Vupdate duration.
+ * @signal: DC signal types.
+ * @use_vbios: to program timings from BIOS command table.
+ *
  */
 void optc1_program_timing(
 	struct timing_generator *optc,
···
  * Sets double buffer point for V_TOTAL, H_TOTAL, VTOTAL_MIN,
  * VTOTAL_MAX, VTOTAL_MIN_SEL and VTOTAL_MAX_SEL registers.
  *
+ * @optc: timing_generator instance.
+ * @enable: Enable DRR double buffering control if true, disable otherwise.
+ *
  * Options: any time,  start of frame, dp start of frame (range timing)
  */
 void optc1_set_timing_double_buffer(struct timing_generator *optc, bool enable)
···
 }
 
 /**
- * unblank_crtc
- * Call ASIC Control Object to UnBlank CRTC.
+ * optc1_unblank_crtc() - Call ASIC Control Object to UnBlank CRTC.
+ *
+ * @optc: timing_generator instance.
  */
 static void optc1_unblank_crtc(struct timing_generator *optc)
 {
···
 }
 
 /**
- * blank_crtc
- * Call ASIC Control Object to Blank CRTC.
+ * optc1_blank_crtc() - Call ASIC Control Object to Blank CRTC.
+ *
+ * @optc: timing_generator instance.
  */
 
 static void optc1_blank_crtc(struct timing_generator *optc)
···
 }
 
 /**
- * Enable CRTC
- * Enable CRTC - call ASIC Control Object to enable Timing generator.
+ * optc1_enable_crtc() - Enable CRTC - call ASIC Control Object to enable Timing generator.
+ *
+ * @optc: timing_generator instance.
  */
 static bool optc1_enable_crtc(struct timing_generator *optc)
 {
···
 			MANUAL_FLOW_CONTROL, 0);
 }
 
-
 /**
- *****************************************************************************
- *  Function: set_drr
+ * optc1_set_drr() - Program dynamic refresh rate registers m_OTGx_OTG_V_TOTAL_*.
  *
- *  @brief
- *     Program dynamic refresh rate registers m_OTGx_OTG_V_TOTAL_*.
- *
- *****************************************************************************
+ * @optc: timing_generator instance.
+ * @params: parameters used for Dynamic Refresh Rate.
  */
 void optc1_set_drr(
 	struct timing_generator *optc,