linux-kernel - [PATCH 4.18 172/197] drm/amd/display: Pass connector id when executing VBIOS CT

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Date:   Thu, 13 Sep 2018 15:32:01 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Mikita Lipski <mikita.lipski@....com>,
        Hersen Wu <hersenxs.wu@....com>, Leo Li <sunpeng.li@....com>,
        Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 4.18 172/197] drm/amd/display: Pass connector id when executing VBIOS CT

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mikita Lipski <mikita.lipski@....com>

commit 433149130c31de3f63b17b4ce08b45dab208f7e8 upstream.

[why]
Older ASICs require both phys_id and connector_id
to execute bios command table. If we are not passing the
right connector_id - it can lead to a black screen.

[how]
Set connector_obj_id when executing vbios command table

Signed-off-by: Mikita Lipski <mikita.lipski@....com>
Reviewed-by: Hersen Wu <hersenxs.wu@....com>
Acked-by: Leo Li <sunpeng.li@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Cc: stable@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
@@ -919,7 +919,7 @@ void dce110_link_encoder_enable_tmds_out
 	enum bp_result result;
 
 	/* Enable the PHY */
-
+	cntl.connector_obj_id = enc110->base.connector;
 	cntl.action = TRANSMITTER_CONTROL_ENABLE;
 	cntl.engine_id = enc->preferred_engine;
 	cntl.transmitter = enc110->base.transmitter;
@@ -961,7 +961,7 @@ void dce110_link_encoder_enable_dp_outpu
 	 * We need to set number of lanes manually.
 	 */
 	configure_encoder(enc110, link_settings);
-
+	cntl.connector_obj_id = enc110->base.connector;
 	cntl.action = TRANSMITTER_CONTROL_ENABLE;
 	cntl.engine_id = enc->preferred_engine;
 	cntl.transmitter = enc110->base.transmitter;