linux-kernel - Re: [PATCH] drm/amdgpu: use dirty framebuffer helper

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Message-ID: <EB4E527C-84AA-464D-9B14-CA8D9E116750@internode.on.net>
Date:   Tue, 20 Sep 2022 12:44:25 +0930
From:   Arthur Marsh <arthur.marsh@...ernode.on.net>
To:     Alex Deucher <alexdeucher@...il.com>
CC:     Xinhui.Pan@....com, airlied@...ux.ie, alexander.deucher@....com,
        amd-gfx@...ts.freedesktop.org, aurabindo.pillai@....com,
        christian.koenig@....com, dri-devel@...ts.freedesktop.org,
        greenfoo@....eu, guchun.chen@....com, hamza.mahfooz@....com,
        linux-kernel@...r.kernel.org, seanpaul@...omium.org
Subject: Re: [PATCH] drm/amdgpu: use dirty framebuffer helper

Thanks, the patch applied against 6.0-rc6 kernel worked and the amdgpu module loaded and works on my Radeon R7 250 (Cape Verde) GPU.

Arthur Marsh. 

On 20 September 2022 2:03:54 am ACST, Alex Deucher <alexdeucher@...il.com> wrote:
>On Sun, Sep 18, 2022 at 8:09 AM root <arthur.marsh@...ernode.on.net> wrote:
>>
>> Hi, I recently experienced lock-ups that only responded to magic sysreq
>> reboots when the amdgpu module was loading on my pc (Athlon II X4 640 CPU,
>> with Radeon R7 250 - Cape Verde).
>>
>> .config has:
>>
>> CONFIG_DRM_AMDGPU=m
>> CONFIG_DRM_AMDGPU_SI=y
>> # CONFIG_DRM_AMDGPU_CIK is not set
>> # CONFIG_DRM_AMDGPU_USERPTR is not set
>>
>> kernel command line has:
>>
>> amdgpu.audio=1 amdgpu.si_support=1 radeon.si_support=0 page_owner=on \
>> amdgpu.gpu_recovery=1
>>
>> Bisecting lead to:
>>
>> commit 66f99628eb24409cb8feb5061f78283c8b65f820
>> Author: Hamza Mahfooz <hamza.mahfooz@....com>
>> Date:   Tue Sep 6 15:01:49 2022 -0400
>>
>>     drm/amdgpu: use dirty framebuffer helper
>>
>>     Currently, we aren't handling DRM_IOCTL_MODE_DIRTYFB. So, use
>>     drm_atomic_helper_dirtyfb() as the dirty callback in the amdgpu_fb_funcs
>>     struct.
>>
>>     Signed-off-by: Hamza Mahfooz <hamza.mahfooz@....com>
>>     Acked-by: Alex Deucher <alexander.deucher@....com>
>>     Signed-off-by: Alex Deucher <alexander.deucher@....com>
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
>> index c20922a5af9f..5b09c8f4fe95 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
>> @@ -38,6 +38,7 @@
>>  #include <linux/pci.h>
>>  #include <linux/pm_runtime.h>
>>  #include <drm/drm_crtc_helper.h>
>> +#include <drm/drm_damage_helper.h>
>>  #include <drm/drm_edid.h>
>>  #include <drm/drm_gem_framebuffer_helper.h>
>>  #include <drm/drm_fb_helper.h>
>> @@ -496,6 +497,7 @@ bool amdgpu_display_ddc_probe(struct amdgpu_connector *amdgpu_connector,
>>  static const struct drm_framebuffer_funcs amdgpu_fb_funcs = {
>>         .destroy = drm_gem_fb_destroy,
>>         .create_handle = drm_gem_fb_create_handle,
>> +       .dirty = drm_atomic_helper_dirtyfb,
>>  };
>>
>>  uint32_t amdgpu_display_supported_domains(struct amdgpu_device *adev,
>>
>> After doing a git bisect reset, git pull and reverting the patch above, I
>> rebuilt the kernel and am successfully running with the amdgpu module loaded
>> and using the Radeon R7 250 GPU.
>>
>> I am happy to supply any further configuration details.
>
>Does the attached patch help?
>
>Alex
>
>
>>
>> Arthur Marsh.

-- 
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