linux-kernel - Re: [PATCH] drm: Add FEC registers for LT-tunable repeaters

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Date:   Fri, 6 Dec 2019 11:38:14 -0500
From:   Harry Wentland <hwentlan@....com>
To:     Rodrigo Siqueira <Rodrigo.Siqueira@....com>,
        =dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        amd-gfx@...ts.freedesktop.org
Cc:     Abdoulaye Berthe <Abdoulaye.Berthe@....com>,
        Harry Wentland <harry.wentland@....com>,
        Leo Li <sunpeng.li@....com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Manasi Navare <manasi.d.navare@...el.com>,
        Ville Syrjälä <ville.syrjala@...ux.intel.com>,
        Nikola Cornij <Nikola.Cornij@....com>
Subject: Re: [PATCH] drm: Add FEC registers for LT-tunable repeaters

On 2019-12-05 8:58 a.m., Rodrigo Siqueira wrote:
> FEC is supported since DP 1.4, and it was expanded for LT-tunable in DP
> 1.4a. This commit adds the address registers for
> FEC_ERROR_COUNT_PHY_REPEATER1 and FEC_CAPABILITY_PHY_REPEATER1.
> 
> Cc: Abdoulaye Berthe <Abdoulaye.Berthe@....com>
> Cc: Harry Wentland <harry.wentland@....com>
> Cc: Leo Li <sunpeng.li@....com>
> Cc: Jani Nikula <jani.nikula@...ux.intel.com>
> Cc: Manasi Navare <manasi.d.navare@...el.com>
> Cc: Ville Syrjälä <ville.syrjala@...ux.intel.com>
> Signed-off-by: Abdoulaye Berthe <Abdoulaye.Berthe@....com>
> Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@....com>

Reviewed-by: Harry Wentland <harry.wentland@....com>

Harry

> ---
>  include/drm/drm_dp_helper.h | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
> index 51ecb5112ef8..b2057009aabc 100644
> --- a/include/drm/drm_dp_helper.h
> +++ b/include/drm/drm_dp_helper.h
> @@ -1042,6 +1042,8 @@
>  #define DP_SYMBOL_ERROR_COUNT_LANE2_PHY_REPEATER1	    0xf0039 /* 1.3 */
>  #define DP_SYMBOL_ERROR_COUNT_LANE3_PHY_REPEATER1	    0xf003b /* 1.3 */
>  #define DP_FEC_STATUS_PHY_REPEATER1			    0xf0290 /* 1.4 */
> +#define DP_FEC_ERROR_COUNT_PHY_REPEATER1                    0xf0291 /* 1.4 */
> +#define DP_FEC_CAPABILITY_PHY_REPEATER1                     0xf0294 /* 1.4a */
>  
>  /* Repeater modes */
>  #define DP_PHY_REPEATER_MODE_TRANSPARENT		    0x55    /* 1.3 */
>