Patch "drm/radeon: disable runtime pm in certain cases" has been added to the 4.8-stable tree

[<gregkh@linuxfoundation.org>]

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

    drm/radeon: disable runtime pm in certain cases

to the 4.8-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-radeon-disable-runtime-pm-in-certain-cases.patch
and it can be found in the queue-4.8 subdirectory.

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


>From 066f1f0b4719eb4573ef09bfc63c2bbb6f7676ca Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Mon, 31 Oct 2016 10:41:49 -0400
Subject: drm/radeon: disable runtime pm in certain cases
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

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

commit 066f1f0b4719eb4573ef09bfc63c2bbb6f7676ca upstream.

If the platform does not support hybrid graphics or ATPX dGPU
power control.

bug: https://bugzilla.kernel.org/show_bug.cgi?id=51381

Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/radeon/radeon_device.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

--- a/drivers/gpu/drm/radeon/radeon_device.c
+++ b/drivers/gpu/drm/radeon/radeon_device.c
@@ -104,6 +104,14 @@ static const char radeon_family_name[][1
 	"LAST",
 };
 
+#if defined(CONFIG_VGA_SWITCHEROO)
+bool radeon_has_atpx_dgpu_power_cntl(void);
+bool radeon_is_atpx_hybrid(void);
+#else
+static inline bool radeon_has_atpx_dgpu_power_cntl(void) { return false; }
+static inline bool radeon_is_atpx_hybrid(void) { return false; }
+#endif
+
 #define RADEON_PX_QUIRK_DISABLE_PX  (1 << 0)
 #define RADEON_PX_QUIRK_LONG_WAKEUP (1 << 1)
 
@@ -160,6 +168,11 @@ static void radeon_device_handle_px_quir
 
 	if (rdev->px_quirk_flags & RADEON_PX_QUIRK_DISABLE_PX)
 		rdev->flags &= ~RADEON_IS_PX;
+
+	/* disable PX is the system doesn't support dGPU power control or hybrid gfx */
+	if (!radeon_is_atpx_hybrid() &&
+	    !radeon_has_atpx_dgpu_power_cntl())
+		rdev->flags &= ~RADEON_IS_PX;
 }
 
 /**


Patches currently in stable-queue which might be from alexander.deucher@amd.com are

queue-4.8/drm-radeon-disable-runtime-pm-in-certain-cases.patch
queue-4.8/drm-amdgpu-fix-crash-in-acp_hw_fini.patch
queue-4.8/drm-amdgpu-disable-runtime-pm-in-certain-cases.patch