Re: [PATCH 7/8] drm/hibmc: Use drm_gem_fb_create

[Thomas Zimmermann <tzimmermann@suse.de>]

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Hi

Am 15.11.19 um 10:21 schrieb Daniel Vetter:
> Again we could delete a lot more if we'd switch over to the generic
> fbdev stuff.

Actually, I do have patches for this since forever. I didn't post them
yet as I couldn't test them. Maybe I should post them and see what
people say.

Best regards
Thomas

> 
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> ---
>  .../gpu/drm/hisilicon/hibmc/hibmc_drm_de.c    |  4 +-
>  .../gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h   | 11 +---
>  .../gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c |  5 +-
>  drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c   | 62 +++++--------------
>  4 files changed, 19 insertions(+), 63 deletions(-)
> 
> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c
> index 6527a97f68a3..2d0920ec4554 100644
> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c
> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c
> @@ -99,14 +99,12 @@ static void hibmc_plane_atomic_update(struct drm_plane *plane,
>  	s64 gpu_addr = 0;
>  	unsigned int line_l;
>  	struct hibmc_drm_private *priv = plane->dev->dev_private;
> -	struct hibmc_framebuffer *hibmc_fb;
>  	struct drm_gem_vram_object *gbo;
>  
>  	if (!state->fb)
>  		return;
>  
> -	hibmc_fb = to_hibmc_framebuffer(state->fb);
> -	gbo = drm_gem_vram_of_gem(hibmc_fb->obj);
> +	gbo = drm_gem_vram_of_gem(fb->obj[0]);
>  
>  	gpu_addr = drm_gem_vram_offset(gbo);
>  	if (WARN_ON_ONCE(gpu_addr < 0))
> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
> index e58ecd7edcf8..ab5b4a4a2095 100644
> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_drv.h
> @@ -20,14 +20,9 @@
>  struct drm_device;
>  struct drm_gem_object;
>  
> -struct hibmc_framebuffer {
> -	struct drm_framebuffer fb;
> -	struct drm_gem_object *obj;
> -};
> -
>  struct hibmc_fbdev {
>  	struct drm_fb_helper helper; /* must be first */
> -	struct hibmc_framebuffer *fb;
> +	struct drm_framebuffer *fb;
>  	int size;
>  };
>  
> @@ -47,8 +42,6 @@ struct hibmc_drm_private {
>  	struct hibmc_fbdev *fbdev;
>  };
>  
> -#define to_hibmc_framebuffer(x) container_of(x, struct hibmc_framebuffer, fb)
> -
>  void hibmc_set_power_mode(struct hibmc_drm_private *priv,
>  			  unsigned int power_mode);
>  void hibmc_set_current_gate(struct hibmc_drm_private *priv,
> @@ -61,7 +54,7 @@ void hibmc_fbdev_fini(struct hibmc_drm_private *priv);
>  
>  int hibmc_gem_create(struct drm_device *dev, u32 size, bool iskernel,
>  		     struct drm_gem_object **obj);
> -struct hibmc_framebuffer *
> +struct drm_framebuffer *
>  hibmc_framebuffer_init(struct drm_device *dev,
>  		       const struct drm_mode_fb_cmd2 *mode_cmd,
>  		       struct drm_gem_object *obj);
> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c
> index b4c1cea051e8..446aeedc9e29 100644
> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c
> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_fbdev.c
> @@ -141,15 +141,14 @@ static int hibmc_drm_fb_create(struct drm_fb_helper *helper,
>  
>  static void hibmc_fbdev_destroy(struct hibmc_fbdev *fbdev)
>  {
> -	struct hibmc_framebuffer *gfb = fbdev->fb;
>  	struct drm_fb_helper *fbh = &fbdev->helper;
>  
>  	drm_fb_helper_unregister_fbi(fbh);
>  
>  	drm_fb_helper_fini(fbh);
>  
> -	if (gfb)
> -		drm_framebuffer_put(&gfb->fb);
> +	if (fbdev->fb)
> +		drm_framebuffer_put(fbdev->fb);
>  }
>  
>  static const struct drm_fb_helper_funcs hibmc_fbdev_helper_funcs = {
> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c b/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
> index 21b684eab5c9..386033b0d3a2 100644
> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_ttm.c
> @@ -16,6 +16,7 @@
>  #include <drm/drm_atomic_helper.h>
>  #include <drm/drm_gem.h>
>  #include <drm/drm_gem_vram_helper.h>
> +#include <drm/drm_gem_framebuffer_helper.h>
>  #include <drm/drm_print.h>
>  
>  #include "hibmc_drm_drv.h"
> @@ -97,74 +98,39 @@ int hibmc_dumb_create(struct drm_file *file, struct drm_device *dev,
>  	return 0;
>  }
>  
> -static void hibmc_user_framebuffer_destroy(struct drm_framebuffer *fb)
> -{
> -	struct hibmc_framebuffer *hibmc_fb = to_hibmc_framebuffer(fb);
> -
> -	drm_gem_object_put_unlocked(hibmc_fb->obj);
> -	drm_framebuffer_cleanup(fb);
> -	kfree(hibmc_fb);
> -}
> -
>  static const struct drm_framebuffer_funcs hibmc_fb_funcs = {
> -	.destroy = hibmc_user_framebuffer_destroy,
> +	.destroy	= drm_gem_fb_destroy,
> +	.create_handle	= drm_gem_fb_create_handle,
>  };
>  
> -struct hibmc_framebuffer *
> +struct drm_framebuffer *
>  hibmc_framebuffer_init(struct drm_device *dev,
>  		       const struct drm_mode_fb_cmd2 *mode_cmd,
>  		       struct drm_gem_object *obj)
>  {
> -	struct hibmc_framebuffer *hibmc_fb;
> +	struct drm_framebuffer *fb;
>  	int ret;
>  
> -	hibmc_fb = kzalloc(sizeof(*hibmc_fb), GFP_KERNEL);
> -	if (!hibmc_fb) {
> -		DRM_ERROR("failed to allocate hibmc_fb\n");
> +	fb = kzalloc(sizeof(*fb), GFP_KERNEL);
> +	if (!fb) {
> +		DRM_ERROR("failed to allocate fb\n");
>  		return ERR_PTR(-ENOMEM);
>  	}
>  
> -	drm_helper_mode_fill_fb_struct(dev, &hibmc_fb->fb, mode_cmd);
> -	hibmc_fb->obj = obj;
> -	ret = drm_framebuffer_init(dev, &hibmc_fb->fb, &hibmc_fb_funcs);
> +	drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
> +	fb->obj[0] = obj;
> +	ret = drm_framebuffer_init(dev, fb, &hibmc_fb_funcs);
>  	if (ret) {
>  		DRM_ERROR("drm_framebuffer_init failed: %d\n", ret);
> -		kfree(hibmc_fb);
> +		kfree(fb);
>  		return ERR_PTR(ret);
>  	}
>  
> -	return hibmc_fb;
> -}
> -
> -static struct drm_framebuffer *
> -hibmc_user_framebuffer_create(struct drm_device *dev,
> -			      struct drm_file *filp,
> -			      const struct drm_mode_fb_cmd2 *mode_cmd)
> -{
> -	struct drm_gem_object *obj;
> -	struct hibmc_framebuffer *hibmc_fb;
> -
> -	DRM_DEBUG_DRIVER("%dx%d, format %c%c%c%c\n",
> -			 mode_cmd->width, mode_cmd->height,
> -			 (mode_cmd->pixel_format) & 0xff,
> -			 (mode_cmd->pixel_format >> 8)  & 0xff,
> -			 (mode_cmd->pixel_format >> 16) & 0xff,
> -			 (mode_cmd->pixel_format >> 24) & 0xff);
> -
> -	obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]);
> -	if (!obj)
> -		return ERR_PTR(-ENOENT);
> -
> -	hibmc_fb = hibmc_framebuffer_init(dev, mode_cmd, obj);
> -	if (IS_ERR(hibmc_fb)) {
> -		drm_gem_object_put_unlocked(obj);
> -		return ERR_PTR((long)hibmc_fb);
> -	}
> -	return &hibmc_fb->fb;
> +	return fb;
>  }
>  
>  const struct drm_mode_config_funcs hibmc_mode_funcs = {
>  	.atomic_check = drm_atomic_helper_check,
>  	.atomic_commit = drm_atomic_helper_commit,
> -	.fb_create = hibmc_user_framebuffer_create,
> +	.fb_create = drm_gem_fb_create,
>  };
> 

-- 
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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