linux-kernel - Re: [PATCH drm-next] drm/bochs: Add support for drm

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Message-ID: <d8055c38-a802-4f9d-bc36-56f6c55099d7@redhat.com>
Date: Thu, 19 Jun 2025 08:42:23 +0200
From: Jocelyn Falempe <jfalempe@...hat.com>
To: Ryosuke Yasuoka <ryasuoka@...hat.com>
Cc: kraxel@...hat.com, maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
 tzimmermann@...e.de, airlied@...il.com, simona@...ll.ch,
 virtualization@...ts.linux.dev, linux-kernel@...r.kernel.org,
 dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH drm-next] drm/bochs: Add support for drm_panic

On 19/06/2025 08:37, Ryosuke Yasuoka wrote:
> On Thu, Jun 19, 2025 at 3:12 PM Jocelyn Falempe <jfalempe@...hat.com> wrote:
>>
>> On 13/06/2025 15:20, Ryosuke Yasuoka wrote:
>>> Add drm_panic moudle for bochs drm so that panic screen can be displayed
>>> on panic.
>>
>> Thanks for the patch, it's simple and looks good to me.
>>
>> Reviewed-by: Jocelyn Falempe <jfalempe@...hat.com>
>>
>> If no objections, I will push it next Monday.
>>
>> Best regards,
>>
>> --
>>
>> Jocelyn
> 
> Thank you Jocelyn for reviewing my patch.
> Now I found a typo in the commit message; moudle -> module.

No need to send a v2 for that, I will fix it before pushing the patch.

Thanks,

-- 

Jocelyn

> 
> Let me fix it in v2.
> 
> Ryosuke
> 
>>>
>>> Signed-off-by: Ryosuke Yasuoka <ryasuoka@...hat.com>
>>> ---
>>>    drivers/gpu/drm/tiny/bochs.c | 19 +++++++++++++++++++
>>>    1 file changed, 19 insertions(+)
>>>
>>> diff --git a/drivers/gpu/drm/tiny/bochs.c b/drivers/gpu/drm/tiny/bochs.c
>>> index 8706763af8fb..ed42ad5c4927 100644
>>> --- a/drivers/gpu/drm/tiny/bochs.c
>>> +++ b/drivers/gpu/drm/tiny/bochs.c
>>> @@ -19,6 +19,7 @@
>>>    #include <drm/drm_gem_shmem_helper.h>
>>>    #include <drm/drm_managed.h>
>>>    #include <drm/drm_module.h>
>>> +#include <drm/drm_panic.h>
>>>    #include <drm/drm_plane_helper.h>
>>>    #include <drm/drm_probe_helper.h>
>>>
>>> @@ -469,10 +470,28 @@ static void bochs_primary_plane_helper_atomic_update(struct drm_plane *plane,
>>>        bochs_hw_setformat(bochs, fb->format);
>>>    }
>>>
>>> +static int bochs_primary_plane_helper_get_scanout_buffer(struct drm_plane *plane,
>>> +                                                       struct drm_scanout_buffer *sb)
>>> +{
>>> +     struct bochs_device *bochs = to_bochs_device(plane->dev);
>>> +     struct iosys_map map = IOSYS_MAP_INIT_VADDR_IOMEM(bochs->fb_map);
>>> +
>>> +     if (plane->state && plane->state->fb) {
>>> +             sb->format = plane->state->fb->format;
>>> +             sb->width = plane->state->fb->width;
>>> +             sb->height = plane->state->fb->height;
>>> +             sb->pitch[0] = plane->state->fb->pitches[0];
>>> +             sb->map[0] = map;
>>> +             return 0;
>>> +     }
>>> +     return -ENODEV;
>>> +}
>>> +
>>>    static const struct drm_plane_helper_funcs bochs_primary_plane_helper_funcs = {
>>>        DRM_GEM_SHADOW_PLANE_HELPER_FUNCS,
>>>        .atomic_check = bochs_primary_plane_helper_atomic_check,
>>>        .atomic_update = bochs_primary_plane_helper_atomic_update,
>>> +     .get_scanout_buffer = bochs_primary_plane_helper_get_scanout_buffer,
>>>    };
>>>
>>>    static const struct drm_plane_funcs bochs_primary_plane_funcs = {
>>>
>>> base-commit: 19272b37aa4f83ca52bdf9c16d5d81bdd1354494
>>
>