[Bug 213561] New: [bisected] AMD GPU can no longer idle state after commit 1c0b0efd148d5b24c4932ddb3fa03c8edd6097b3

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=213561

            Bug ID: 213561
           Summary: [bisected] AMD GPU can no longer idle state after
                    commit 1c0b0efd148d5b24c4932ddb3fa03c8edd6097b3
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.13rc7
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: untaintableangel at hotmail.co.uk
        Regression: No

Nature of the problem: RX 5700 is unable to enter low power state at idle (see
below for usual behaviour)

Sensors at idle prior to the commit:
amdgpu-pci-0f00
Adapter: PCI adapter
vddgfx:      775.00 mV 
fan1:           0 RPM  (min =    0 RPM, max = 3200 RPM)
edge:         +48.0°C  (crit = +100.0°C, hyst = -273.1°C)
                       (emerg = +105.0°C)
junction:     +48.0°C  (crit = +110.0°C, hyst = -273.1°C)
                       (emerg = +115.0°C)
mem:          +52.0°C  (crit = +105.0°C, hyst = -273.1°C)
                       (emerg = +110.0°C)
power1:        8.00 W  (cap = 165.00 W)

After the commit, the lowest is:
amdgpu-pci-0f00
Adapter: PCI adapter
vddgfx:        1.03 V  
fan1:           0 RPM  (min =    0 RPM, max = 3200 RPM)
edge:         +54.0°C  (crit = +100.0°C, hyst = -273.1°C)
                       (emerg = +105.0°C)
junction:     +56.0°C  (crit = +110.0°C, hyst = -273.1°C)
                       (emerg = +115.0°C)
mem:          +52.0°C  (crit = +105.0°C, hyst = -273.1°C)
                       (emerg = +110.0°C)
power1:       31.00 W  (cap = 165.00 W)


This problem wasn't present in rc6 but is present in 5.13rc7 and bisects to:

1c0b0efd148d5b24c4932ddb3fa03c8edd6097b3 is the first bad commit
commit 1c0b0efd148d5b24c4932ddb3fa03c8edd6097b3
Author: Yifan Zhang <yifan1.zhang at amd.com>
Date:   Thu Jun 10 10:10:07 2021 +0800

    drm/amdgpu/gfx10: enlarge CP_MEC_DOORBELL_RANGE_UPPER to cover full
doorbell.

    If GC has entered CGPG, ringing doorbell > first page doesn't wakeup GC.
    Enlarge CP_MEC_DOORBELL_RANGE_UPPER to workaround this issue.

    Signed-off-by: Yifan Zhang <yifan1.zhang at amd.com>
    Reviewed-by: Felix Kuehling <Felix.Kuehling at amd.com>
    Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
    Cc: stable at vger.kernel.org


The device is a Sapphire Pulse RX5700 and this problem is seen even with one
monitor set at 60Hz.
GPU: 0f:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Navi 10 [Radeon RX 5600 OEM/5600 XT / 5700/5700 XT] [1002:731f] (rev
c4)

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