[Intel-gfx] [PATCH 1/2] drm/dp: note that DPCD 0x2002-0x2003 match 0x200-0x201

[Ville Syrjälä]

On Tue, Jan 04, 2022 at 08:48:56PM +0200, Jani Nikula wrote:
> DP_SINK_COUNT_ESI and DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0 have the same
> contents as DP_SINK_COUNT and DP_DEVICE_SERVICE_IRQ_VECTOR,
> respectively.

IIRC there was an oversight in the earlier spec revisions that
showed bit 7 as reserved for one of the locations. But looks like
that got fixed.

Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

> 
> Signed-off-by: Jani Nikula <jani.nikula at intel.com>
> ---
>  include/drm/drm_dp_helper.h | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
> 
> diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
> index 30359e434c3f..98d020835b49 100644
> --- a/include/drm/drm_dp_helper.h
> +++ b/include/drm/drm_dp_helper.h
> @@ -1038,11 +1038,8 @@ struct drm_panel;
>  #define DP_SIDEBAND_MSG_UP_REQ_BASE	    0x1600   /* 1.2 MST */
>  
>  /* DPRX Event Status Indicator */
> -#define DP_SINK_COUNT_ESI		    0x2002   /* 1.2 */
> -/* 0-5 sink count */
> -# define DP_SINK_COUNT_CP_READY             (1 << 6)
> -
> -#define DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0   0x2003   /* 1.2 */
> +#define DP_SINK_COUNT_ESI                   0x2002   /* same as 0x200 */
> +#define DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0   0x2003   /* same as 0x201 */
>  
>  #define DP_DEVICE_SERVICE_IRQ_VECTOR_ESI1   0x2004   /* 1.2 */
>  # define DP_RX_GTC_MSTR_REQ_STATUS_CHANGE    (1 << 0)
> -- 
> 2.30.2

-- 
Ville Syrjälä
Intel