[Bug 103370] `vblank_mode=0 DRI_PRIME=1 glxgears` will introduce GPU lock up on Intel Graphics [8086:5917] + AMD Graphics [1002:6665] (rev c3) - bugzilla-daemon

From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 103370] `vblank_mode=0 DRI_PRIME=1 glxgears` will introduce GPU lock up on Intel Graphics [8086:5917] + AMD Graphics [1002:6665] (rev c3)
Date: Thu, 15 Mar 2018 06:45:54 +0000	[thread overview]
Message-ID: <bug-103370-502-BdIG8XMtqm@http.bugs.freedesktop.org/> (raw)
In-Reply-To: <bug-103370-502@http.bugs.freedesktop.org/>


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https://bugs.freedesktop.org/show_bug.cgi?id=103370

Shih-Yuan Lee <fourdollars@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

--- Comment #46 from Shih-Yuan Lee <fourdollars@gmail.com> ---
The Linux kernel of Comment 45 is 4.15.0-10.11 from Ubuntu 18.04.
When I tried a later version 4.15.0-12.13, I can not reduplicate this issue on
Ubuntu 18.04.
4.15.0-12.13 contains the following commit.

commit 239b5f64e12b1f09f506c164dff0374924782979
Author: Alex Deucher <alexander.deucher@amd.com>
Date:   Tue Nov 21 12:09:38 2017 -0500

    drm/radeon: Add dpm quirk for Jet PRO (v2)

    Fixes stability issues.

    v2: clamp sclk to 600 Mhz

    Bug: https://bugs.freedesktop.org/show_bug.cgi?id=103370
    Acked-by: Christian König <christian.koenig@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
    Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/radeon/si_dpm.c b/drivers/gpu/drm/radeon/si_dpm.c
index ee3e742..97a0a63 100644
--- a/drivers/gpu/drm/radeon/si_dpm.c
+++ b/drivers/gpu/drm/radeon/si_dpm.c
@@ -2984,6 +2984,11 @@ static void si_apply_state_adjust_rules(struct
radeon_device *rdev,
                    (rdev->pdev->device == 0x6667)) {
                        max_sclk = 75000;
                }
+               if ((rdev->pdev->revision == 0xC3) ||
+                   (rdev->pdev->device == 0x6665)) {
+                       max_sclk = 60000;
+                       max_mclk = 80000;
+               }
        } else if (rdev->family == CHIP_OLAND) {
                if ((rdev->pdev->revision == 0xC7) ||
                    (rdev->pdev->revision == 0x80) ||

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