linux-kernel - Re: [PATCH] drm: Add LT-tunable PHY repeater mode operations

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Message-ID: <d9014121-a7e6-3487-1977-b26346456e24@amd.com>
Date:   Tue, 15 Oct 2019 14:30:51 +0000
From:   Harry Wentland <hwentlan@....com>
To:     "Siqueira, Rodrigo" <Rodrigo.Siqueira@....com>,
        "Berthe, Abdoulaye" <Abdoulaye.Berthe@....com>,
        "Wentland, Harry" <Harry.Wentland@....com>,
        "Li, Sun peng (Leo)" <Sunpeng.Li@....com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Manasi Navare <manasi.d.navare@...el.com>,
        Ville Syrjälä 
        <ville.syrjala@...ux.intel.com>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Maxime Ripard <mripard@...nel.org>
CC:     "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm: Add LT-tunable PHY repeater mode operations

On 2019-10-15 9:40 a.m., Siqueira, Rodrigo wrote:
> LT-tunable PHY Repeaters can operate in two different modes: transparent
> (default) and non-transparent. The value 0x55 specifies the transparent
> mode, and 0xaa represents the non-transparent; this commit adds these
> two values as definitions.
> 
> 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 | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
> index bf62b43aaf2b..cfadeeef8492 100644
> --- a/include/drm/drm_dp_helper.h
> +++ b/include/drm/drm_dp_helper.h
> @@ -1034,6 +1034,10 @@
>  #define DP_SYMBOL_ERROR_COUNT_LANE3_PHY_REPEATER1	    0xf003b /* 1.3 */
>  #define DP_FEC_STATUS_PHY_REPEATER1			    0xf0290 /* 1.4 */
>  
> +/* Repeater modes */
> +#define DP_PHY_REPEATER_MODE_TRANSPARENT		    0x55    /* 1.3 */
> +#define DP_PHY_REPEATER_MODE_NON_TRANSPARENT		    0xaa    /* 1.3 */
> +
>  /* DP HDCP message start offsets in DPCD address space */
>  #define DP_HDCP_2_2_AKE_INIT_OFFSET		DP_HDCP_2_2_REG_RTX_OFFSET
>  #define DP_HDCP_2_2_AKE_SEND_CERT_OFFSET	DP_HDCP_2_2_REG_CERT_RX_OFFSET
> 



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