[PATCH 1/4] drm/vmwgfx: Make console emulation depend on DRM_FBDEV_EMULATION

[Thomas Zimmermann]

Am 15.04.21 um 20:50 schrieb Thomas Zimmermann:
> Hi
> 
> Am 15.04.21 um 20:21 schrieb Zack Rusin:
>> On 4/15/21 7:00 AM, Thomas Zimmermann wrote:
>>> Respect DRM's kconfig setting for fbdev console emulation. If enabled,
>>> it will select all required config options. So remove them from vmwgfx's
>>> Kconfig file.
>>>
>>> Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
>>> ---
>>>   drivers/gpu/drm/vmwgfx/Kconfig      |  7 +------
>>>   drivers/gpu/drm/vmwgfx/Makefile     | 
> 4 +++-
>>>   drivers/gpu/drm/vmwgfx/vmwgfx_drv.h | 19 +++++++++++++++++++
>>>   3 files changed, 23 insertions(+), 7 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/vmwgfx/Kconfig 
>>> b/drivers/gpu/drm/vmwgfx/Kconfig
>>> index 15acdf2a7c0f..b3a34196935b 100644
>>> --- a/drivers/gpu/drm/vmwgfx/Kconfig
>>> +++ b/drivers/gpu/drm/vmwgfx/Kconfig
>>> @@ -2,12 +2,7 @@
>>>   config DRM_VMWGFX
>>>       tristate "DRM driver for VMware Virtual 
> GPU"
>>>       depends on DRM && PCI && X86 && MMU
>>> -    select FB_DEFERRED_IO
>>> -    select FB_CFB_FILLRECT
>>> -    select FB_CFB_COPYAREA
>>> -    select FB_CFB_IMAGEBLIT
>>>       select DRM_TTM
>>> -    select FB
>>>       select MAPPING_DIRTY_HELPERS
>>>       # Only needed for the transitional use 
of drm_crtc_init - can 
>>> be removed
>>>       # again once vmwgfx sets up the primary 
> plane itself.
>>> @@ -20,7 +15,7 @@ config DRM_VMWGFX
>>>         The compiled module will be 
> called "vmwgfx.ko".
>>>   config DRM_VMWGFX_FBCON
>>> -    depends on DRM_VMWGFX && FB
>>> +    depends on DRM_VMWGFX && DRM_FBDEV_EMULATION
>>>       bool "Enable framebuffer console under 
vmwgfx by default"
>>>       help
>>>          Choose this option if 
> you are shipping a new vmwgfx
>>> diff --git a/drivers/gpu/drm/vmwgfx/Makefile 
>>> b/drivers/gpu/drm/vmwgfx/Makefile
>>> index 8c02fa5852e7..9f5743013cbb 100644
>>> --- a/drivers/gpu/drm/vmwgfx/Makefile
>>> +++ b/drivers/gpu/drm/vmwgfx/Makefile
>>> @@ -1,6 +1,6 @@
>>>   # SPDX-License-Identifier: GPL-2.0
>>>   vmwgfx-y := vmwgfx_execbuf.o vmwgfx_gmr.o vmwgfx_kms.o vmwgfx_drv.o \
>>> -        vmwgfx_fb.o vmwgfx_ioctl.o 
> vmwgfx_resource.o
>>> vmwgfx_ttm_buffer.o \
>>> +        vmwgfx_ioctl.o vmwgfx_resource.o vmwgfx_ttm_buffer.o \
>>>           vmwgfx_cmd.o vmwgfx_irq.o vmwgfx_ldu.o vmwgfx_ttm_glue.o \
>>>           vmwgfx_overlay.o vmwgfx_gmrid_manager.o vmwgfx_fence.o \
>>>           vmwgfx_bo.o vmwgfx_scrn.o vmwgfx_context.o \
>>> @@ -11,5 +11,7 @@ vmwgfx-y := vmwgfx_execbuf.o vmwgfx_gmr.o 
>>> vmwgfx_kms.o vmwgfx_drv.o \
>>>           vmwgfx_validation.o vmwgfx_page_dirty.o 
>>> vmwgfx_streamoutput.o \
>>>           ttm_object.o ttm_lock.o ttm_memory.o
>>> +vmwgfx-$(CONFIG_DRM_FBDEV_EMULATION) += vmwgfx_fb.o
>>>   vmwgfx-$(CONFIG_TRANSPARENT_HUGEPAGE) += vmwgfx_thp.o
>>> +
>>>   obj-$(CONFIG_DRM_VMWGFX) := vmwgfx.o
>>> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h 
>>> b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
>>> index 7e6518709e14..e7836da190c4 100644
>>> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
>>> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.h
>>> @@ -1116,10 +1116,29 @@ extern void vmw_generic_waiter_remove(struct 
>>> vmw_private *dev_priv,
>>>    * Kernel framebuffer - vmwgfx_fb.c
>>>    */
>>> +#ifdef CONFIG_DRM_FBDEV_EMULATION
>>>   int vmw_fb_init(struct vmw_private *vmw_priv);
>>>   int vmw_fb_close(struct vmw_private *dev_priv);
>>>   int vmw_fb_off(struct vmw_private *vmw_priv);
>>>   int vmw_fb_on(struct vmw_private *vmw_priv);
>>> +#else
>>> +static inline int vmw_fb_init(struct vmw_private *vmw_priv)
>>> +{
>>> +    return 0;
>>> +}
>>> +static inline int vmw_fb_close(struct vmw_private *dev_priv)
>>> +{
>>> +    return 0;
>>> +}
>>> +static inline int vmw_fb_off(struct vmw_private *vmw_priv)
>>> +{
>>> +    return 0;
>>> +}
>>> +static inline int vmw_fb_on(struct vmw_private *vmw_priv)
>>> +{
>>> +    return 0;
>>> +}
>>> +#endif
>>>   /**
>>>    * Kernel modesetting - vmwgfx_kms.c
>>>
>>
>> This changes the behavior a bit, I guess DRM_VMWGFX (or at least 
>> DRM_VMWGFX_FBCON) would need to select DRM_FBDEV_EMULATION to preserve 

>> the old behavior, but that's largely due to the fact that given how 
>> those options were setup we never run without FB set. In general it 
>> should be ok and looks more reasonable than the current setup. I'll try 
> 
>> it out on Monday just in case, but for now:
>>
>> Reviewed-by: Zack Rusin <zackr at vmware.com>
>>
> 
> All other drivers use DRM_FBDEV_EMULATION, so vmwgfx would follow common 
> conventions.
> 
> AFAICT DRM_VMWGFX_FBCON is just the default on/off setting. How about 
> making DRM_VMWGFX_FBCON depend on DRM_FBDEV_EMULATION? Users would be 
> able to enable fbdev emulation in general and, if needed, still pick a 
> separate default on/off for vmwgfx.

Oh, lol. That's already in the patchset.

> 
> Best regards
> Thomas
> 
>> z
> 
> 
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> 

-- 
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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