This is a note to let you know that I've just added the patch titled
Revert "drm/i915/bxt: Disable device ready before shutdown command"
to the 4.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
revert-drm-i915-bxt-disable-device-ready-before-shutdown-command.patch
and it can be found in the queue-4.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From abeae421b03d800d33894df7fbca6d00c70c358e Mon Sep 17 00:00:00 2001
From: Uma Shankar <uma.shankar@xxxxxxxxx>
Date: Tue, 5 Sep 2017 15:14:31 +0530
Subject: Revert "drm/i915/bxt: Disable device ready before shutdown command"
From: Uma Shankar <uma.shankar@xxxxxxxxx>
commit abeae421b03d800d33894df7fbca6d00c70c358e upstream.
This reverts commit bbdf0b2ff32a ("drm/i915/bxt: Disable device ready
before shutdown command").
Disable device ready before shutdown command was added previously to
avoid a split screen issue seen on dual link DSI panels. As of now, dual
link is not supported and will need some rework in the upstream
code. For single link DSI panels, the change is not required. This will
cause failure in sending SHUTDOWN packet during disable. Hence reverting
the change. Will handle the change as part of dual link enabling in
upstream.
Fixes: bbdf0b2ff32a ("drm/i915/bxt: Disable device ready before shutdown command")
Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
Signed-off-by: Vidya Srinivas <vidya.srinivas@xxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/1504604671-17237-1-git-send-email-vidya.srinivas@xxxxxxxxx
(cherry picked from commit 33c8d8870c67faf3161898a56af98ac3c1c71450)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_dsi.c | 11 -----------
1 file changed, 11 deletions(-)
--- a/drivers/gpu/drm/i915/intel_dsi.c
+++ b/drivers/gpu/drm/i915/intel_dsi.c
@@ -892,8 +892,6 @@ static void intel_dsi_disable(struct int
struct intel_crtc_state *old_crtc_state,
struct drm_connector_state *old_conn_state)
{
- struct drm_device *dev = encoder->base.dev;
- struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
enum port port;
@@ -903,15 +901,6 @@ static void intel_dsi_disable(struct int
intel_panel_disable_backlight(old_conn_state);
/*
- * Disable Device ready before the port shutdown in order
- * to avoid split screen
- */
- if (IS_BROXTON(dev_priv)) {
- for_each_dsi_port(port, intel_dsi->ports)
- I915_WRITE(MIPI_DEVICE_READY(port), 0);
- }
-
- /*
* According to the spec we should send SHUTDOWN before
* MIPI_SEQ_DISPLAY_OFF only for v3+ VBTs, but field testing
* has shown that the v3 sequence works for v2 VBTs too
Patches currently in stable-queue which might be from uma.shankar@xxxxxxxxx are
queue-4.13/revert-drm-i915-bxt-disable-device-ready-before-shutdown-command.patch