linux-kernel - [ 34/71] drm/radeon/dpm: add reclocking quirk for ASUS K70AF

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Message-Id: <20130929192645.834412379@linuxfoundation.org>
Date:	Sun, 29 Sep 2013 12:27:46 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Alex Deucher <alexander.deucher@....com>
Subject: [ 34/71] drm/radeon/dpm: add reclocking quirk for ASUS K70AF

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

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

From: Alex Deucher <alexander.deucher@....com>

commit f75195cac32bfd2ef07764bd370d3b788bd8b003 upstream.

The LCD has a relatively short vblank time (216us), but
the card is able to reclock memory fine in that time.

Signed-off-by: Alex Deucher <alexander.deucher@....com>
Reported-by: normalrawr@...il.com
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/radeon/rv770_dpm.c |   10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/radeon/rv770_dpm.c
+++ b/drivers/gpu/drm/radeon/rv770_dpm.c
@@ -2517,8 +2517,16 @@ u32 rv770_dpm_get_mclk(struct radeon_dev
 bool rv770_dpm_vblank_too_short(struct radeon_device *rdev)
 {
 	u32 vblank_time = r600_dpm_get_vblank_time(rdev);
+	u32 switch_limit = 300;
 
-	if (vblank_time < 300)
+	/* quirks */
+	/* ASUS K70AF */
+	if ((rdev->pdev->device == 0x9553) &&
+	    (rdev->pdev->subsystem_vendor == 0x1043) &&
+	    (rdev->pdev->subsystem_device == 0x1c42))
+		switch_limit = 200;
+
+	if (vblank_time < switch_limit)
 		return true;
 	else
 		return false;


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