Hi

Am 05.06.20 um 10:40 schrieb Laurent Pinchart:
> Hi Thomas,
> 
> Thank you for the patch.
> 
> On Fri, Jun 05, 2020 at 09:32:05AM +0200, Thomas Zimmermann wrote:
>> This fixes the naming of several symbols within CMA helpers. No functional
>> changes are made.
>>
>> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> 
> Thank you for the patch.
> 
> Speaking of naming, I wish we could rename drm_gem_cma_* to something
> else, as those helpers don't use CMA directly (and may not use it at
> all), but I think that would be too much intrusive changes for too
> little gain :-(

I agree. Calling them GEM DMA helpers would be more precise. But I don't
really see an easy solution without either a big patch that touches
everything, or a lot of small patches with ugly intermediate states.

IMHO the best option would probably be an additional header file
drm_gem_dma_helper.h that defines a dma name for each cma name. Drivers
could then be converted individually with a single per-driver patch.

Best regards
Thomas

> 
>> ---
>>  drivers/gpu/drm/aspeed/aspeed_gfx_drv.c |  2 +-
>>  drivers/gpu/drm/drm_gem_cma_helper.c    | 10 +++++-----
>>  include/drm/drm_gem_cma_helper.h        |  4 ++--
>>  3 files changed, 8 insertions(+), 8 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c b/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c
>> index 6b27242b9ee3c..5e7ea0459d018 100644
>> --- a/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c
>> +++ b/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c
>> @@ -188,7 +188,7 @@ DEFINE_DRM_GEM_CMA_FOPS(fops);
>>  
>>  static struct drm_driver aspeed_gfx_driver = {
>>  	.driver_features        = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
>> -	.gem_create_object	= drm_cma_gem_create_object_default_funcs,
>> +	.gem_create_object	= drm_gem_cma_create_object_default_funcs,
>>  	.dumb_create		= drm_gem_cma_dumb_create,
>>  	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
>>  	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
>> diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c b/drivers/gpu/drm/drm_gem_cma_helper.c
>> index b3db3ca7bd7a7..842e2fa332354 100644
>> --- a/drivers/gpu/drm/drm_gem_cma_helper.c
>> +++ b/drivers/gpu/drm/drm_gem_cma_helper.c
>> @@ -572,7 +572,7 @@ void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
>>  }
>>  EXPORT_SYMBOL_GPL(drm_gem_cma_prime_vunmap);
>>  
>> -static const struct drm_gem_object_funcs drm_cma_gem_default_funcs = {
>> +static const struct drm_gem_object_funcs drm_gem_cma_default_funcs = {
>>  	.free = drm_gem_cma_free_object,
>>  	.print_info = drm_gem_cma_print_info,
>>  	.get_sg_table = drm_gem_cma_prime_get_sg_table,
>> @@ -581,7 +581,7 @@ static const struct drm_gem_object_funcs drm_cma_gem_default_funcs = {
>>  };
>>  
>>  /**
>> - * drm_cma_gem_create_object_default_funcs - Create a CMA GEM object with a
>> + * drm_gem_cma_create_object_default_funcs - Create a CMA GEM object with a
>>   *                                           default function table
>>   * @dev: DRM device
>>   * @size: Size of the object to allocate
>> @@ -593,7 +593,7 @@ static const struct drm_gem_object_funcs drm_cma_gem_default_funcs = {
>>   * A pointer to a allocated GEM object or an error pointer on failure.
>>   */
>>  struct drm_gem_object *
>> -drm_cma_gem_create_object_default_funcs(struct drm_device *dev, size_t size)
>> +drm_gem_cma_create_object_default_funcs(struct drm_device *dev, size_t size)
>>  {
>>  	struct drm_gem_cma_object *cma_obj;
>>  
>> @@ -601,11 +601,11 @@ drm_cma_gem_create_object_default_funcs(struct drm_device *dev, size_t size)
>>  	if (!cma_obj)
>>  		return NULL;
>>  
>> -	cma_obj->base.funcs = &drm_cma_gem_default_funcs;
>> +	cma_obj->base.funcs = &drm_gem_cma_default_funcs;
>>  
>>  	return &cma_obj->base;
>>  }
>> -EXPORT_SYMBOL(drm_cma_gem_create_object_default_funcs);
>> +EXPORT_SYMBOL(drm_gem_cma_create_object_default_funcs);
>>  
>>  /**
>>   * drm_gem_cma_prime_import_sg_table_vmap - PRIME import another driver's
>> diff --git a/include/drm/drm_gem_cma_helper.h b/include/drm/drm_gem_cma_helper.h
>> index 947ac95eb24a9..64b7e9d42129a 100644
>> --- a/include/drm/drm_gem_cma_helper.h
>> +++ b/include/drm/drm_gem_cma_helper.h
>> @@ -107,7 +107,7 @@ void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj);
>>  void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
>>  
>>  struct drm_gem_object *
>> -drm_cma_gem_create_object_default_funcs(struct drm_device *dev, size_t size);
>> +drm_gem_cma_create_object_default_funcs(struct drm_device *dev, size_t size);
>>  
>>  /**
>>   * DRM_GEM_CMA_VMAP_DRIVER_OPS - CMA GEM driver operations ensuring a virtual
>> @@ -118,7 +118,7 @@ drm_cma_gem_create_object_default_funcs(struct drm_device *dev, size_t size);
>>   * imported buffers.
>>   */
>>  #define DRM_GEM_CMA_VMAP_DRIVER_OPS \
>> -	.gem_create_object	= drm_cma_gem_create_object_default_funcs, \
>> +	.gem_create_object	= drm_gem_cma_create_object_default_funcs, \
>>  	.dumb_create		= drm_gem_cma_dumb_create, \
>>  	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd, \
>>  	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle, \
> 

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