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

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Date:   Mon, 19 Sep 2022 12:33:54 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     root <arthur.marsh@...ernode.on.net>
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

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.

View attachment "0001-drm-amdgpu-don-t-register-a-dirty-callback-for-non-a.patch" of type "text/x-patch" (1915 bytes)