linux-kernel - [PATCH 4.10 48/75] drm/amdgpu/pm: check for headless before calling compute

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Message-Id: <20170313083414.069299873@linuxfoundation.org>
Date:   Mon, 13 Mar 2017 16:43:57 +0800
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: [PATCH 4.10 48/75] drm/amdgpu/pm: check for headless before calling compute_clocks

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

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

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

commit c10c8f7c27103bd7ac02d041d9d6e97296d48fc1 upstream.

Don't update display bandwidth on headless asics.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=99387

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

---
 drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -1252,7 +1252,8 @@ void amdgpu_pm_compute_clocks(struct amd
 	if (!adev->pm.dpm_enabled)
 		return;
 
-	amdgpu_display_bandwidth_update(adev);
+	if (adev->mode_info.num_crtc)
+		amdgpu_display_bandwidth_update(adev);
 
 	for (i = 0; i < AMDGPU_MAX_RINGS; i++) {
 		struct amdgpu_ring *ring = adev->rings[i];