Message-ID: <20190520111852.GA6789@aptenodytes>
Date:   Mon, 20 May 2019 13:18:52 +0200
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     Maxime Ripard <maxime.ripard@...tlin.com>
Cc:     Daniel Vetter <daniel.vetter@...el.com>,
        David Airlie <airlied@...ux.ie>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Sean Paul <seanpaul@...omium.org>,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        Emil Velikov <emil.velikov@...labora.com>
Subject: Re: [PATCH v3 4/7] drm/fourcc: Pass the format_info pointer to
 drm_format_plane_cpp

Hi,

On Thu 16 May 19, 12:31, Maxime Ripard wrote:
> So far, the drm_format_plane_cpp function was operating on the format's
> fourcc and was doing a lookup to retrieve the drm_format_info structure and
> return the cpp.
> 
> However, this is inefficient since in most cases, we will have the
> drm_format_info pointer already available so we shouldn't have to perform a
> new lookup. Some drm_fourcc functions also already operate on the
> drm_format_info pointer for that reason, so the API is quite inconsistent
> there.
> 
> Let's follow the latter pattern and remove the extra lookup while being a
> bit more consistent. In order to be extra consistent, also rename that
> function to drm_format_info_plane_cpp and to a static function in the
> header to match the current policy.

I know it's out of the scope of this patch, but we really should have an
unsigned plane index wherever it's used. We're only checking for
plane >= info->num_planes but seldom for plane < 0.

Either way, this is:
Reviewed-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>

Cheers,

Paul

> Reviewed-by: Emil Velikov <emil.velikov@...labora.com>
> Signed-off-by: Maxime Ripard <maxime.ripard@...tlin.com>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c     |  4 +++-
>  drivers/gpu/drm/arm/malidp_hw.c            |  3 ++-
>  drivers/gpu/drm/arm/malidp_planes.c        |  2 +-
>  drivers/gpu/drm/drm_client.c               |  3 ++-
>  drivers/gpu/drm/drm_fb_helper.c            |  2 +-
>  drivers/gpu/drm/drm_format_helper.c        |  4 ++--
>  drivers/gpu/drm/drm_fourcc.c               | 20 --------------------
>  drivers/gpu/drm/i915/intel_sprite.c        |  3 ++-
>  drivers/gpu/drm/mediatek/mtk_drm_fb.c      |  2 +-
>  drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c  |  3 ++-
>  drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c   |  2 +-
>  drivers/gpu/drm/msm/msm_fb.c               |  2 +-
>  drivers/gpu/drm/radeon/radeon_fb.c         |  4 +++-
>  drivers/gpu/drm/rockchip/rockchip_drm_fb.c |  2 +-
>  drivers/gpu/drm/stm/ltdc.c                 |  2 +-
>  drivers/gpu/drm/tegra/fb.c                 |  2 +-
>  drivers/gpu/drm/zte/zx_plane.c             |  2 +-
>  include/drm/drm_fourcc.h                   | 18 +++++++++++++++++-
>  18 files changed, 42 insertions(+), 38 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
> index e47609218839..06e73a343724 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
> @@ -121,6 +121,8 @@ static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
>  					 struct drm_mode_fb_cmd2 *mode_cmd,
>  					 struct drm_gem_object **gobj_p)
>  {
> +	const struct drm_format_info *info = drm_get_format_info(dev,
> +								 mode_cmd);
>  	struct amdgpu_device *adev = rfbdev->adev;
>  	struct drm_gem_object *gobj = NULL;
>  	struct amdgpu_bo *abo = NULL;
> @@ -131,7 +133,7 @@ static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
>  	int height = mode_cmd->height;
>  	u32 cpp;
>  
> -	cpp = drm_format_plane_cpp(mode_cmd->pixel_format, 0);
> +	cpp = drm_format_info_plane_cpp(info, 0);
>  
>  	/* need to align pitch with crtc limits */
>  	mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, cpp,
> diff --git a/drivers/gpu/drm/arm/malidp_hw.c b/drivers/gpu/drm/arm/malidp_hw.c
> index 8df12e9a33bb..1c9e869f4c52 100644
> --- a/drivers/gpu/drm/arm/malidp_hw.c
> +++ b/drivers/gpu/drm/arm/malidp_hw.c
> @@ -382,7 +382,8 @@ static void malidp500_modeset(struct malidp_hw_device *hwdev, struct videomode *
>  
>  int malidp_format_get_bpp(u32 fmt)
>  {
> -	int bpp = drm_format_plane_cpp(fmt, 0) * 8;
> +	const struct drm_format_info *info = drm_format_info(fmt);
> +	int bpp = drm_format_info_plane_cpp(info, 0) * 8;
>  
>  	if (bpp == 0) {
>  		switch (fmt) {
> diff --git a/drivers/gpu/drm/arm/malidp_planes.c b/drivers/gpu/drm/arm/malidp_planes.c
> index 8f89813d08c1..361c02988375 100644
> --- a/drivers/gpu/drm/arm/malidp_planes.c
> +++ b/drivers/gpu/drm/arm/malidp_planes.c
> @@ -227,7 +227,7 @@ bool malidp_format_mod_supported(struct drm_device *drm,
>  
>  	if (modifier & AFBC_SPLIT) {
>  		if (!info->is_yuv) {
> -			if (drm_format_plane_cpp(format, 0) <= 2) {
> +			if (drm_format_info_plane_cpp(info, 0) <= 2) {
>  				DRM_DEBUG_KMS("RGB formats <= 16bpp are not supported with SPLIT\n");
>  				return false;
>  			}
> diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c
> index f20d1dda3961..169d8eeaa662 100644
> --- a/drivers/gpu/drm/drm_client.c
> +++ b/drivers/gpu/drm/drm_client.c
> @@ -243,6 +243,7 @@ static void drm_client_buffer_delete(struct drm_client_buffer *buffer)
>  static struct drm_client_buffer *
>  drm_client_buffer_create(struct drm_client_dev *client, u32 width, u32 height, u32 format)
>  {
> +	const struct drm_format_info *info = drm_format_info(format);
>  	struct drm_mode_create_dumb dumb_args = { };
>  	struct drm_device *dev = client->dev;
>  	struct drm_client_buffer *buffer;
> @@ -258,7 +259,7 @@ drm_client_buffer_create(struct drm_client_dev *client, u32 width, u32 height, u
>  
>  	dumb_args.width = width;
>  	dumb_args.height = height;
> -	dumb_args.bpp = drm_format_plane_cpp(format, 0) * 8;
> +	dumb_args.bpp = drm_format_info_plane_cpp(info, 0) * 8;
>  	ret = drm_mode_create_dumb(dev, &dumb_args, client->file);
>  	if (ret)
>  		goto err_delete;
> diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
> index 498f95c3e81d..184f455c99ab 100644
> --- a/drivers/gpu/drm/drm_fb_helper.c
> +++ b/drivers/gpu/drm/drm_fb_helper.c
> @@ -767,7 +767,7 @@ static void drm_fb_helper_dirty_blit_real(struct drm_fb_helper *fb_helper,
>  					  struct drm_clip_rect *clip)
>  {
>  	struct drm_framebuffer *fb = fb_helper->fb;
> -	unsigned int cpp = drm_format_plane_cpp(fb->format->format, 0);
> +	unsigned int cpp = drm_format_info_plane_cpp(fb->format, 0);
>  	size_t offset = clip->y1 * fb->pitches[0] + clip->x1 * cpp;
>  	void *src = fb_helper->fbdev->screen_buffer + offset;
>  	void *dst = fb_helper->buffer->vaddr + offset;
> diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c
> index a18da35145b7..8ad66aa1362a 100644
> --- a/drivers/gpu/drm/drm_format_helper.c
> +++ b/drivers/gpu/drm/drm_format_helper.c
> @@ -36,7 +36,7 @@ static unsigned int clip_offset(struct drm_rect *clip,
>  void drm_fb_memcpy(void *dst, void *vaddr, struct drm_framebuffer *fb,
>  		   struct drm_rect *clip)
>  {
> -	unsigned int cpp = drm_format_plane_cpp(fb->format->format, 0);
> +	unsigned int cpp = drm_format_info_plane_cpp(fb->format, 0);
>  	size_t len = (clip->x2 - clip->x1) * cpp;
>  	unsigned int y, lines = clip->y2 - clip->y1;
>  
> @@ -63,7 +63,7 @@ void drm_fb_memcpy_dstclip(void __iomem *dst, void *vaddr,
>  			   struct drm_framebuffer *fb,
>  			   struct drm_rect *clip)
>  {
> -	unsigned int cpp = drm_format_plane_cpp(fb->format->format, 0);
> +	unsigned int cpp = drm_format_info_plane_cpp(fb->format, 0);
>  	unsigned int offset = clip_offset(clip, fb->pitches[0], cpp);
>  	size_t len = (clip->x2 - clip->x1) * cpp;
>  	unsigned int y, lines = clip->y2 - clip->y1;
> diff --git a/drivers/gpu/drm/drm_fourcc.c b/drivers/gpu/drm/drm_fourcc.c
> index e4a2c8372c8b..5f63fc74e265 100644
> --- a/drivers/gpu/drm/drm_fourcc.c
> +++ b/drivers/gpu/drm/drm_fourcc.c
> @@ -333,26 +333,6 @@ drm_get_format_info(struct drm_device *dev,
>  EXPORT_SYMBOL(drm_get_format_info);
>  
>  /**
> - * drm_format_plane_cpp - determine the bytes per pixel value
> - * @format: pixel format (DRM_FORMAT_*)
> - * @plane: plane index
> - *
> - * Returns:
> - * The bytes per pixel value for the specified plane.
> - */
> -int drm_format_plane_cpp(uint32_t format, int plane)
> -{
> -	const struct drm_format_info *info;
> -
> -	info = drm_format_info(format);
> -	if (!info || plane >= info->num_planes)
> -		return 0;
> -
> -	return info->cpp[plane];
> -}
> -EXPORT_SYMBOL(drm_format_plane_cpp);
> -
> -/**
>   * drm_format_plane_width - width of the plane given the first plane
>   * @width: width of the first plane
>   * @format: pixel format
> diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
> index 2913e89280d7..e35601b1f878 100644
> --- a/drivers/gpu/drm/i915/intel_sprite.c
> +++ b/drivers/gpu/drm/i915/intel_sprite.c
> @@ -325,7 +325,8 @@ skl_plane_max_stride(struct intel_plane *plane,
>  		     u32 pixel_format, u64 modifier,
>  		     unsigned int rotation)
>  {
> -	int cpp = drm_format_plane_cpp(pixel_format, 0);
> +	const struct drm_format_info *info = drm_format_info(pixel_format);
> +	int cpp = drm_format_info_plane_cpp(info, 0);
>  
>  	/*
>  	 * "The stride in bytes must not exceed the
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_fb.c b/drivers/gpu/drm/mediatek/mtk_drm_fb.c
> index 68fdef8b12bd..0d5334a5a9a7 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_fb.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_fb.c
> @@ -104,7 +104,7 @@ struct drm_framebuffer *mtk_drm_mode_fb_create(struct drm_device *dev,
>  	if (!gem)
>  		return ERR_PTR(-ENOENT);
>  
> -	bpp = drm_format_plane_cpp(cmd->pixel_format, 0);
> +	bpp = drm_format_info_plane_cpp(info, 0);
>  	size = (height - 1) * cmd->pitches[0] + width * bpp;
>  	size += cmd->offsets[0];
>  
> diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
> index b0cf63c4e3d7..a565dccaba3a 100644
> --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
> +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_crtc.c
> @@ -782,6 +782,7 @@ static void get_roi(struct drm_crtc *crtc, uint32_t *roi_w, uint32_t *roi_h)
>  
>  static void mdp5_crtc_restore_cursor(struct drm_crtc *crtc)
>  {
> +	const struct drm_format_info *info = drm_format_info(DRM_FORMAT_ARGB8888);
>  	struct mdp5_crtc_state *mdp5_cstate = to_mdp5_crtc_state(crtc->state);
>  	struct mdp5_crtc *mdp5_crtc = to_mdp5_crtc(crtc);
>  	struct mdp5_kms *mdp5_kms = get_kms(crtc);
> @@ -800,7 +801,7 @@ static void mdp5_crtc_restore_cursor(struct drm_crtc *crtc)
>  	width = mdp5_crtc->cursor.width;
>  	height = mdp5_crtc->cursor.height;
>  
> -	stride = width * drm_format_plane_cpp(DRM_FORMAT_ARGB8888, 0);
> +	stride = width * drm_format_info_plane_cpp(info, 0);
>  
>  	get_roi(crtc, &roi_w, &roi_h);
>  
> diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c
> index b30b2f4efc60..1ca294694597 100644
> --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c
> +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_smp.c
> @@ -158,7 +158,7 @@ uint32_t mdp5_smp_calculate(struct mdp5_smp *smp,
>  	for (i = 0; i < nplanes; i++) {
>  		int n, fetch_stride, cpp;
>  
> -		cpp = drm_format_plane_cpp(fmt, i);
> +		cpp = drm_format_info_plane_cpp(info, i);
>  		fetch_stride = width * cpp / (i ? hsub : 1);
>  
>  		n = DIV_ROUND_UP(fetch_stride * nlines, smp->blk_size);
> diff --git a/drivers/gpu/drm/msm/msm_fb.c b/drivers/gpu/drm/msm/msm_fb.c
> index f69c0afd6ec6..29e45f2144b5 100644
> --- a/drivers/gpu/drm/msm/msm_fb.c
> +++ b/drivers/gpu/drm/msm/msm_fb.c
> @@ -181,7 +181,7 @@ static struct drm_framebuffer *msm_framebuffer_init(struct drm_device *dev,
>  		unsigned int min_size;
>  
>  		min_size = (height - 1) * mode_cmd->pitches[i]
> -			 + width * drm_format_plane_cpp(mode_cmd->pixel_format, i)
> +			 + width * drm_format_info_plane_cpp(info, i)
>  			 + mode_cmd->offsets[i];
>  
>  		if (bos[i]->size < min_size) {
> diff --git a/drivers/gpu/drm/radeon/radeon_fb.c b/drivers/gpu/drm/radeon/radeon_fb.c
> index 1298b84cb1c7..dbf596fc4339 100644
> --- a/drivers/gpu/drm/radeon/radeon_fb.c
> +++ b/drivers/gpu/drm/radeon/radeon_fb.c
> @@ -125,6 +125,7 @@ static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
>  					 struct drm_mode_fb_cmd2 *mode_cmd,
>  					 struct drm_gem_object **gobj_p)
>  {
> +	const struct drm_format_info *info;
>  	struct radeon_device *rdev = rfbdev->rdev;
>  	struct drm_gem_object *gobj = NULL;
>  	struct radeon_bo *rbo = NULL;
> @@ -135,7 +136,8 @@ static int radeonfb_create_pinned_object(struct radeon_fbdev *rfbdev,
>  	int height = mode_cmd->height;
>  	u32 cpp;
>  
> -	cpp = drm_format_plane_cpp(mode_cmd->pixel_format, 0);
> +	info = drm_get_format_info(rdev->ddev, mode_cmd);
> +	cpp = drm_format_info_plane_cpp(info, 0);
>  
>  	/* need to align pitch with crtc limits */
>  	mode_cmd->pitches[0] = radeon_align_pitch(rdev, mode_cmd->width, cpp,
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
> index c318fae28581..57873c99ae29 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
> @@ -98,7 +98,7 @@ rockchip_user_fb_create(struct drm_device *dev, struct drm_file *file_priv,
>  
>  		min_size = (height - 1) * mode_cmd->pitches[i] +
>  			mode_cmd->offsets[i] +
> -			width * drm_format_plane_cpp(mode_cmd->pixel_format, i);
> +			width * drm_format_info_plane_cpp(info, i);
>  
>  		if (obj->size < min_size) {
>  			drm_gem_object_put_unlocked(obj);
> diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
> index 32fd6a3b37fb..6bb3cd3a1a01 100644
> --- a/drivers/gpu/drm/stm/ltdc.c
> +++ b/drivers/gpu/drm/stm/ltdc.c
> @@ -779,7 +779,7 @@ static void ltdc_plane_atomic_update(struct drm_plane *plane,
>  
>  	/* Configures the color frame buffer pitch in bytes & line length */
>  	pitch_in_bytes = fb->pitches[0];
> -	line_length = drm_format_plane_cpp(fb->format->format, 0) *
> +	line_length = drm_format_info_plane_cpp(fb->format, 0) *
>  		      (x1 - x0 + 1) + (ldev->caps.bus_width >> 3) - 1;
>  	val = ((pitch_in_bytes << 16) | line_length);
>  	reg_update_bits(ldev->regs, LTDC_L1CFBLR + lofs,
> diff --git a/drivers/gpu/drm/tegra/fb.c b/drivers/gpu/drm/tegra/fb.c
> index 94fb75089d87..d1042196a30f 100644
> --- a/drivers/gpu/drm/tegra/fb.c
> +++ b/drivers/gpu/drm/tegra/fb.c
> @@ -149,7 +149,7 @@ struct drm_framebuffer *tegra_fb_create(struct drm_device *drm,
>  			goto unreference;
>  		}
>  
> -		bpp = drm_format_plane_cpp(cmd->pixel_format, i);
> +		bpp = drm_format_info_plane_cpp(info, i);
>  
>  		size = (height - 1) * cmd->pitches[i] +
>  		       width * bpp + cmd->offsets[i];
> diff --git a/drivers/gpu/drm/zte/zx_plane.c b/drivers/gpu/drm/zte/zx_plane.c
> index c6a8be444300..d97a4dff515d 100644
> --- a/drivers/gpu/drm/zte/zx_plane.c
> +++ b/drivers/gpu/drm/zte/zx_plane.c
> @@ -222,7 +222,7 @@ static void zx_vl_plane_atomic_update(struct drm_plane *plane,
>  		cma_obj = drm_fb_cma_get_gem_obj(fb, i);
>  		paddr = cma_obj->paddr + fb->offsets[i];
>  		paddr += src_y * fb->pitches[i];
> -		paddr += src_x * drm_format_plane_cpp(format, i);
> +		paddr += src_x * drm_format_info_plane_cpp(fb->format, i);
>  		zx_writel(paddr_reg, paddr);
>  		paddr_reg += 4;
>  	}
> diff --git a/include/drm/drm_fourcc.h b/include/drm/drm_fourcc.h
> index eeec449d6c6a..6b5a82b31bc4 100644
> --- a/include/drm/drm_fourcc.h
> +++ b/include/drm/drm_fourcc.h
> @@ -260,6 +260,23 @@ drm_format_info_is_yuv_sampling_444(const struct drm_format_info *info)
>  	return info->is_yuv && info->hsub == 1 && info->vsub == 1;
>  }
>  
> +/**
> + * drm_format_info_plane_cpp - determine the bytes per pixel value
> + * @format: pixel format info
> + * @plane: plane index
> + *
> + * Returns:
> + * The bytes per pixel value for the specified plane.
> + */
> +static inline
> +int drm_format_info_plane_cpp(const struct drm_format_info *info, int plane)
> +{
> +	if (!info || plane >= info->num_planes)
> +		return 0;
> +
> +	return info->cpp[plane];
> +}
> +
>  const struct drm_format_info *__drm_format_info(u32 format);
>  const struct drm_format_info *drm_format_info(u32 format);
>  const struct drm_format_info *
> @@ -268,7 +285,6 @@ drm_get_format_info(struct drm_device *dev,
>  uint32_t drm_mode_legacy_fb_format(uint32_t bpp, uint32_t depth);
>  uint32_t drm_driver_legacy_fb_format(struct drm_device *dev,
>  				     uint32_t bpp, uint32_t depth);
> -int drm_format_plane_cpp(uint32_t format, int plane);
>  int drm_format_plane_width(int width, uint32_t format, int plane);
>  int drm_format_plane_height(int height, uint32_t format, int plane);
>  unsigned int drm_format_info_block_width(const struct drm_format_info *info,
> -- 
> git-series 0.9.1
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

-- 
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com

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