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

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Message-ID: <20191015134010.26zwopwnrbsmz5az@outlook.office365.com>
Date:   Tue, 15 Oct 2019 13:40:12 +0000
From:   "Siqueira, Rodrigo" <Rodrigo.Siqueira@....com>
To:     "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: [PATCH] drm: Add LT-tunable PHY repeater mode operations

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>
---
 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
-- 
2.23.0

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