[PATCH 00/10] drm/radeon: Convert fbdev to DRM client

[Thomas Zimmermann]

Hi

Am 20.03.23 um 16:23 schrieb Alex Deucher:
> On Mon, Mar 20, 2023 at 11:19 AM Thomas Zimmermann <tzimmermann at suse.de> wrote:
>>
>> Hi
>>
>> Am 20.03.23 um 16:11 schrieb Christian König:
>>> Am 17.03.23 um 10:20 schrieb Thomas Zimmermann:
>>>> Hi Christian
>>>>
>>>> Am 17.03.23 um 09:53 schrieb Christian König:
>>>>> Am 16.03.23 um 10:37 schrieb Thomas Zimmermann:
>>>>>> Convert radeon's fbdev code to drm_client. Replaces the current
>>>>>> ad-hoc integration. The conversion includes a number of cleanups.
>>>>>> Only build fbdev support if the config option has been set.
>>>>>
>>>>> I'm torn apart on that. On the one hand it looks like a really nice
>>>>> cleanup on the other hand we don't really want to touch radeon any more.
>>>>
>>>> It's a driver in the upstream kernel. You have to expect at least some
>>>> changes.
>>>
>>> Some changes is not the problem, but we need a justification to change
>>> something. Just that it's nice to have won't do it without extensive
>>> testing.
>>>
>>>>
>>>>>
>>>>> Alex what do you think? Is that worth the risk of breaking stuff?
>>>>
>>>> Moving all fbdev emulation to struct drm_client is required for new
>>>> in-kernel DRM clients, such as a DRM kernel logger or a boot splash.
>>>
>>> Well that's a rather good justification. I suggest to add that to the
>>> cover-letter.
>>
>> Ok, will go into a possible v2. The mid-term plan is to convert the
>> fbdev code in all remaining drivers to struct drm_client and remove the
>> old ad-hoc callbacks.
>>
>> With struct drm_client, we can select in-kernel clients at compile time
>> or runtime just like userspace clients. I guess, we can have a bootup
>> screen and then switch to the console or the DRM logger. Or go from any
>> client to the logger on kernel panics (or something like that). There's
>> been occasional talk about userspace consoles, which would use such
>> functionality.
> 
> Patches look good to me.  I have a pretty limited set of HW I can test
> on since I don't have a functional AGP system anymore and most of my
> older PCIe radeons are packed up in the attic.  Feel free to add my:

I've tested the patches with an R5-based card.

> Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
> to the series.

Thank you so much. Do you want to take the patches into the amd tree?

Best regards
Thomas

> 
> Alex
> 
>>
>> Best regards
>> Thomas
>>
>>>
>>> Regards,
>>> Christian.
>>>
>>>>
>>>> Best regards
>>>> Thomas
>>>>
>>>>>
>>>>> Christian.
>>>>>
>>>>>>
>>>>>> Thomas Zimmermann (10):
>>>>>>     drm/radeon: Move radeon_align_pitch() next to dumb-buffer helpers
>>>>>>     drm/radeon: Improve fbdev object-test helper
>>>>>>     drm/radeon: Remove struct radeon_fbdev
>>>>>>     drm/radeon: Remove test for !screen_base in fbdev probing
>>>>>>     drm/radeon: Move fbdev object helpers before struct fb_ops et al
>>>>>>     drm/radeon: Fix coding style in fbdev emulation
>>>>>>     drm/radeon: Move fbdev cleanup code into fb_destroy callback
>>>>>>     drm/radeon: Correctly clean up failed display probing
>>>>>>     drm/radeon: Implement client-based fbdev emulation
>>>>>>     drm/radeon: Only build fbdev if DRM_FBDEV_EMULATION is set
>>>>>>
>>>>>>    drivers/gpu/drm/radeon/Makefile         |   3 +-
>>>>>>    drivers/gpu/drm/radeon/radeon.h         |   2 +
>>>>>>    drivers/gpu/drm/radeon/radeon_display.c |   4 -
>>>>>>    drivers/gpu/drm/radeon/radeon_drv.c     |   3 +-
>>>>>>    drivers/gpu/drm/radeon/radeon_drv.h     |   1 -
>>>>>>    drivers/gpu/drm/radeon/radeon_fb.c      | 400 ----------------------
>>>>>>    drivers/gpu/drm/radeon/radeon_fbdev.c   | 422
>>>>>> ++++++++++++++++++++++++
>>>>>>    drivers/gpu/drm/radeon/radeon_gem.c     |  24 ++
>>>>>>    drivers/gpu/drm/radeon/radeon_kms.c     |  18 -
>>>>>>    drivers/gpu/drm/radeon/radeon_mode.h    |  20 +-
>>>>>>    10 files changed, 464 insertions(+), 433 deletions(-)
>>>>>>    delete mode 100644 drivers/gpu/drm/radeon/radeon_fb.c
>>>>>>    create mode 100644 drivers/gpu/drm/radeon/radeon_fbdev.c
>>>>>>
>>>>>>
>>>>>> base-commit: ec0708e846b819c8d5b642de42448a87d7526564
>>>>>
>>>>
>>>
>>
>> --
>> Thomas Zimmermann
>> Graphics Driver Developer
>> SUSE Software Solutions Germany GmbH
>> Maxfeldstr. 5, 90409 Nürnberg, Germany
>> (HRB 36809, AG Nürnberg)
>> Geschäftsführer: Ivo Totev

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Ivo Totev
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