Re: [PATCH 37/59] drm/cirrus: Move to drm/tiny

Thomas Zimmermann
2020-04-15T08:46:22Z

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Am 15.04.20 um 10:19 schrieb Daniel Vetter:
> On Wed, Apr 15, 2020 at 10:01 AM Thomas Zimmermann <tzimmermann@suse.de> wrote:
>>
>>
>>
>> Am 15.04.20 um 09:40 schrieb Daniel Vetter:
>>> Because it is. Huge congrats to everyone who made this kind of
>>> refactoring happen!
>>
>> Every other week, I felt an urge to send out this patch. Thank you so
>> much, Daniel! There are more candidates for tiny/. They are all <20k
>> LOCs and all we'd have to do is to move their code into a single file.

I meant <20k file size, not LOCs.

>> bochs or arc come into my mind.
>
> arc I have (later in the series), bochs I feel like is maybe a bit too
> big. I'd put the limit for tiny well below 1kloc including whitespace
> and all that. bochs might be a candidate once we've helperized a few
> more things perhaps.

True. The largest tiny driver is repaper with ~1.1k LOCS. Reading this
code, it seems like it has reached an upper bound of what is feasible.

Best regards
Thomas

>
> btw I drmm_ version of vram helpers would help a bunch of these drivers I think.
> -Daniel
>
>>
>>>
>>> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
>>> Cc: Dave Airlie <airlied@redhat.com>
>>> Cc: Gerd Hoffmann <kraxel@redhat.com>
>>> Cc: virtualization@lists.linux-foundation.org
>>
>> Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
>>
>>> ---
>>> MAINTAINERS | 2 +-
>>> drivers/gpu/drm/Kconfig | 2 --
>>> drivers/gpu/drm/Makefile | 1 -
>>> drivers/gpu/drm/cirrus/Kconfig | 19 -------------------
>>> drivers/gpu/drm/cirrus/Makefile | 2 --
>>> drivers/gpu/drm/tiny/Kconfig | 19 +++++++++++++++++++
>>> drivers/gpu/drm/tiny/Makefile | 1 +
>>> drivers/gpu/drm/{cirrus => tiny}/cirrus.c | 0
>>> 8 files changed, 21 insertions(+), 25 deletions(-)
>>> delete mode 100644 drivers/gpu/drm/cirrus/Kconfig
>>> delete mode 100644 drivers/gpu/drm/cirrus/Makefile
>>> rename drivers/gpu/drm/{cirrus => tiny}/cirrus.c (100%)
>>>
>>> diff --git a/MAINTAINERS b/MAINTAINERS
>>> index 7b3255d96d1d..0a5cf105ee37 100644
>>> --- a/MAINTAINERS
>>> +++ b/MAINTAINERS
>>> @@ -5397,7 +5397,7 @@ L: virtualization@lists.linux-foundation.org
>>> S: Obsolete
>>> W: https://www.kraxel.org/blog/2014/10/qemu-using-cirrus-considered-harmful/
>>> T: git git://anongit.freedesktop.org/drm/drm-misc
>>> -F: drivers/gpu/drm/cirrus/
>>> +F: drivers/gpu/drm/tiny/cirrus.c
>>>
>>> DRM DRIVER FOR QXL VIRTUAL GPU
>>> M: Dave Airlie <airlied@redhat.com>
>>> diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
>>> index 43594978958e..4f4e7fa001c1 100644
>>> --- a/drivers/gpu/drm/Kconfig
>>> +++ b/drivers/gpu/drm/Kconfig
>>> @@ -310,8 +310,6 @@ source "drivers/gpu/drm/ast/Kconfig"
>>>
>>> source "drivers/gpu/drm/mgag200/Kconfig"
>>>
>>> -source "drivers/gpu/drm/cirrus/Kconfig"
>>> -
>>> source "drivers/gpu/drm/armada/Kconfig"
>>>
>>> source "drivers/gpu/drm/atmel-hlcdc/Kconfig"
>>> diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
>>> index f34d08c83485..2c0e5a7e5953 100644
>>> --- a/drivers/gpu/drm/Makefile
>>> +++ b/drivers/gpu/drm/Makefile
>>> @@ -74,7 +74,6 @@ obj-$(CONFIG_DRM_I915) += i915/
>>> obj-$(CONFIG_DRM_MGAG200) += mgag200/
>>> obj-$(CONFIG_DRM_V3D) += v3d/
>>> obj-$(CONFIG_DRM_VC4) += vc4/
>>> -obj-$(CONFIG_DRM_CIRRUS_QEMU) += cirrus/
>>> obj-$(CONFIG_DRM_SIS) += sis/
>>> obj-$(CONFIG_DRM_SAVAGE)+= savage/
>>> obj-$(CONFIG_DRM_VMWGFX)+= vmwgfx/
>>> diff --git a/drivers/gpu/drm/cirrus/Kconfig b/drivers/gpu/drm/cirrus/Kconfig
>>> deleted file mode 100644
>>> index c6bbd988b0e5..000000000000
>>> --- a/drivers/gpu/drm/cirrus/Kconfig
>>> +++ /dev/null
>>> @@ -1,19 +0,0 @@
>>> -# SPDX-License-Identifier: GPL-2.0-only
>>> -config DRM_CIRRUS_QEMU
>>> - tristate "Cirrus driver for QEMU emulated device"
>>> - depends on DRM && PCI && MMU
>>> - select DRM_KMS_HELPER
>>> - select DRM_GEM_SHMEM_HELPER
>>> - help
>>> - This is a KMS driver for emulated cirrus device in qemu.
>>> - It is *NOT* intended for real cirrus devices. This requires
>>> - the modesetting userspace X.org driver.
>>> -
>>> - Cirrus is obsolete, the hardware was designed in the 90ies
>>> - and can't keep up with todays needs. More background:
>>> - https://www.kraxel.org/blog/2014/10/qemu-using-cirrus-considered-harmful/
>>> -
>>> - Better alternatives are:
>>> - - stdvga (DRM_BOCHS, qemu -vga std, default in qemu 2.2+)
>>> - - qxl (DRM_QXL, qemu -vga qxl, works best with spice)
>>> - - virtio (DRM_VIRTIO_GPU), qemu -vga virtio)
>>> diff --git a/drivers/gpu/drm/cirrus/Makefile b/drivers/gpu/drm/cirrus/Makefile
>>> deleted file mode 100644
>>> index 0c1ed3f99725..000000000000
>>> --- a/drivers/gpu/drm/cirrus/Makefile
>>> +++ /dev/null
>>> @@ -1,2 +0,0 @@
>>> -# SPDX-License-Identifier: GPL-2.0-only
>>> -obj-$(CONFIG_DRM_CIRRUS_QEMU) += cirrus.o
>>> diff --git a/drivers/gpu/drm/tiny/Kconfig b/drivers/gpu/drm/tiny/Kconfig
>>> index 4160e74e4751..2b6414f0fa75 100644
>>> --- a/drivers/gpu/drm/tiny/Kconfig
>>> +++ b/drivers/gpu/drm/tiny/Kconfig
>>> @@ -1,5 +1,24 @@
>>> # SPDX-License-Identifier: GPL-2.0-only
>>>
>>> +config DRM_CIRRUS_QEMU
>>> + tristate "Cirrus driver for QEMU emulated device"
>>> + depends on DRM && PCI && MMU
>>> + select DRM_KMS_HELPER
>>> + select DRM_GEM_SHMEM_HELPER
>>> + help
>>> + This is a KMS driver for emulated cirrus device in qemu.
>>> + It is *NOT* intended for real cirrus devices. This requires
>>> + the modesetting userspace X.org driver.
>>> +
>>> + Cirrus is obsolete, the hardware was designed in the 90ies
>>> + and can't keep up with todays needs. More background:
>>> + https://www.kraxel.org/blog/2014/10/qemu-using-cirrus-considered-harmful/
>>> +
>>> + Better alternatives are:
>>> + - stdvga (DRM_BOCHS, qemu -vga std, default in qemu 2.2+)
>>> + - qxl (DRM_QXL, qemu -vga qxl, works best with spice)
>>> + - virtio (DRM_VIRTIO_GPU), qemu -vga virtio)
>>> +
>>> config DRM_GM12U320
>>> tristate "GM12U320 driver for USB projectors"
>>> depends on DRM && USB
>>> diff --git a/drivers/gpu/drm/tiny/Makefile b/drivers/gpu/drm/tiny/Makefile
>>> index c96ceee71453..6ae4e9e5a35f 100644
>>> --- a/drivers/gpu/drm/tiny/Makefile
>>> +++ b/drivers/gpu/drm/tiny/Makefile
>>> @@ -1,5 +1,6 @@
>>> # SPDX-License-Identifier: GPL-2.0-only
>>>
>>> +obj-$(CONFIG_DRM_CIRRUS_QEMU) += cirrus.o
>>> obj-$(CONFIG_DRM_GM12U320) += gm12u320.o
>>> obj-$(CONFIG_TINYDRM_HX8357D) += hx8357d.o
>>> obj-$(CONFIG_TINYDRM_ILI9225) += ili9225.o
>>> diff --git a/drivers/gpu/drm/cirrus/cirrus.c b/drivers/gpu/drm/tiny/cirrus.c
>>> similarity index 100%
>>> rename from drivers/gpu/drm/cirrus/cirrus.c
>>> rename to drivers/gpu/drm/tiny/cirrus.c
>>>
>>
>> --
>> Thomas Zimmermann
>> Graphics Driver Developer
>> SUSE Software Solutions Germany GmbH
>> Maxfeldstr. 5, 90409 Nürnberg, Germany
>> (HRB 36809, AG Nürnberg)
>> Geschäftsführer: Felix Imendörffer
>>
>
>

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

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