linux-kernel - [PATCH 3.4 22/92] Add radeon suspend/resume quirk for HP Compaq dc5750.

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Message-Id: <1460976397-5688-22-git-send-email-lizf@kernel.org>
Date:	Mon, 18 Apr 2016 18:45:27 +0800
From:	lizf@...nel.org
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Jeffery Miller <jmiller@...erware.com>,
	Alex Deucher <alexander.deucher@....com>,
	Zefan Li <lizefan@...wei.com>
Subject: [PATCH 3.4 22/92] Add radeon suspend/resume quirk for HP Compaq dc5750.

From: Jeffery Miller <jmiller@...erware.com>

3.4.112-rc1 review patch.  If anyone has any objections, please let me know.

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


commit 09bfda10e6efd7b65bcc29237bee1765ed779657 upstream.

With the radeon driver loaded the HP Compaq dc5750
Small Form Factor machine fails to resume from suspend.
Adding a quirk similar to other devices avoids
the problem and the system resumes properly.

Signed-off-by: Jeffery Miller <jmiller@...erware.com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Zefan Li <lizefan@...wei.com>
---
 drivers/gpu/drm/radeon/radeon_combios.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/radeon/radeon_combios.c b/drivers/gpu/drm/radeon/radeon_combios.c
index b72eb50..69c2dd0 100644
--- a/drivers/gpu/drm/radeon/radeon_combios.c
+++ b/drivers/gpu/drm/radeon/radeon_combios.c
@@ -3399,6 +3399,14 @@ void radeon_combios_asic_init(struct drm_device *dev)
 	    rdev->pdev->subsystem_device == 0x30ae)
 		return;
 
+	/* quirk for rs4xx HP Compaq dc5750 Small Form Factor to make it resume
+	 * - it hangs on resume inside the dynclk 1 table.
+	 */
+	if (rdev->family == CHIP_RS480 &&
+	    rdev->pdev->subsystem_vendor == 0x103c &&
+	    rdev->pdev->subsystem_device == 0x280a)
+		return;
+
 	/* DYN CLK 1 */
 	table = combios_get_table_offset(dev, COMBIOS_DYN_CLK_1_TABLE);
 	if (table)
-- 
1.9.1