[Intel-gfx] Patch "drm/i915: Disable self-refresh for untiled fbs on i915gm" has been added to the 3.14-stable tree

[gregkh at linuxfoundation.org]

This is a note to let you know that I've just added the patch titled

    drm/i915: Disable self-refresh for untiled fbs on i915gm

to the 3.14-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:
     drm-i915-disable-self-refresh-for-untiled-fbs-on-i915gm.patch
and it can be found in the queue-3.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable at vger.kernel.org> know about it.


>From daniel.vetter at ffwll.ch  Tue Jun  3 23:12:52 2014
From: Daniel Vetter <daniel.vetter at ffwll.ch>
Date: Wed, 21 May 2014 11:07:22 +0200
Subject: drm/i915: Disable self-refresh for untiled fbs on i915gm
To: stable at vger.kernel.org
Cc: Intel Graphics Development <intel-gfx at lists.freedesktop.org>, Daniel Vetter <daniel.vetter at ffwll.ch>, Ville Syrjälä  <ville.syrjala at linux.intel.com>, Chris Wilson <chris at chris-wilson.co.uk>, Krzysztof Mazur <krzysiek at podlesie.net>, Jani Nikula <jani.nikula at intel.com>
Message-ID: <1400663245-15601-2-git-send-email-daniel.vetter at ffwll.ch>

From: Daniel Vetter <daniel.vetter at ffwll.ch>

This is commit 2ab1bc9df01dbc19b55b2271100db7 upstream.

Apparently it doesn't work. X-tiled self-refresh works flawlessly
otoh. Apparently X still works correctly with linear framebuffers, so
might just be an issue with the initial modeset. It's unclear whether
this just borked wm setup from our side or a hw restriction, but just
disabling gets things going.

Note that this regression was only brought to light with

commit 3f2dc5ac05714711fc14f2bf0ee5e42d5c08c581
Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
Date:   Fri Jan 10 14:06:47 2014 +0200

    drm/i915: Fix 915GM self-refresh enable/disable

before that self-refresh for i915GM didn't work at all.

Kudos to Ville for spotting a little bug in the original patch I've
attached to the bug.

Cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76103
Tested-by: Krzysztof Mazur <krzysiek at podlesie.net>
Cc: Krzysztof Mazur <krzysiek at podlesie.net>
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
[Jani: rebase on top of drm-next with primary plane support.]
Signed-off-by: Jani Nikula <jani.nikula at intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
---
 drivers/gpu/drm/i915/intel_pm.c |   10 ++++++++++
 1 file changed, 10 insertions(+)

--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -1539,6 +1539,16 @@ static void i9xx_update_wm(struct drm_cr
 
 	DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm);
 
+	if (IS_I915GM(dev) && enabled) {
+		struct intel_framebuffer *fb;
+
+		fb = to_intel_framebuffer(enabled->fb);
+
+		/* self-refresh seems busted with untiled */
+		if (fb->obj->tiling_mode == I915_TILING_NONE)
+			enabled = NULL;
+	}
+
 	/*
 	 * Overlay gets an aggressive default since video jitter is bad.
 	 */


Patches currently in stable-queue which might be from daniel.vetter at ffwll.ch are

queue-3.14/drm-i915-don-t-warn-nor-handle-unexpected-hpd-interrupts-on-gmch-platforms.patch
queue-3.14/drm-i915-fix-unsafe-loop-iteration-over-vma-whilst-unbinding-them.patch
queue-3.14/drm-i915-disable-self-refresh-for-untiled-fbs-on-i915gm.patch
queue-3.14/drm-i915-don-t-check-gmch-state-on-inherited-configs.patch
queue-3.14/drm-i915-break-encoder-crtc-link-separately-in-intel_sanitize_crtc.patch
queue-3.14/drm-i915-quirk-invert-brightness-for-acer-aspire-5336.patch
queue-3.14/drm-i915-move-power-domain-init-earlier-during-system-resume.patch