linux-kernel - [PATCH 5.10 084/120] drm/i915: Power up combo PHY lanes for for HDMI as well

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Date:   Mon,  8 Feb 2021 16:01:11 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Ville Syrjälä 
        <ville.syrjala@...ux.intel.com>, Imre Deak <imre.deak@...el.com>,
        Jani Nikula <jani.nikula@...el.com>
Subject: [PATCH 5.10 084/120] drm/i915: Power up combo PHY lanes for for HDMI as well

From: Ville Syrjälä <ville.syrjala@...ux.intel.com>

commit fad9bae9ee5d578afbe6380c82e4715efaddf118 upstream.

Currently we only explicitly power up the combo PHY lanes
for DP. The spec says we should do it for HDMI as well.

Cc: stable@...r.kernel.org
Signed-off-by: Ville Syrjälä <ville.syrjala@...ux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210128155948.13678-3-ville.syrjala@linux.intel.com
Reviewed-by: Imre Deak <imre.deak@...el.com>
(cherry picked from commit 1e0cb7bef35f0d1aed383bf69a209df218b807c9)
Signed-off-by: Jani Nikula <jani.nikula@...el.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpu/drm/i915/display/intel_ddi.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -3936,6 +3936,8 @@ static void intel_enable_ddi_hdmi(struct
 		intel_de_write(dev_priv, reg, val);
 	}
 
+	intel_ddi_power_up_lanes(encoder, crtc_state);
+
 	/* In HDMI/DVI mode, the port width, and swing/emphasis values
 	 * are ignored so nothing special needs to be done besides
 	 * enabling the port.