linux-kernel - Re: [PATCH v5 02/16] drm/vkms: Use drm

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Message-ID: <3f577a73-3daa-44e4-ab3c-ead1df422cfd@igalia.com>
Date: Mon, 25 Mar 2024 10:20:02 -0300
From: Maíra Canal <mcanal@...lia.com>
To: Louis Chauvet <louis.chauvet@...tlin.com>,
 Rodrigo Siqueira <rodrigosiqueiramelo@...il.com>,
 Melissa Wen <melissa.srw@...il.com>,
 Haneen Mohammed <hamohammed.sa@...il.com>, Daniel Vetter <daniel@...ll.ch>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, arthurgrillo@...eup.net,
 Jonathan Corbet <corbet@....net>, pekka.paalanen@...oniitty.fi
Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
 jeremie.dautheribes@...tlin.com, miquel.raynal@...tlin.com,
 thomas.petazzoni@...tlin.com, seanpaul@...gle.com, marcheu@...gle.com,
 nicolejadeyee@...gle.com
Subject: Re: [PATCH v5 02/16] drm/vkms: Use drm_frame directly

On 3/13/24 14:44, Louis Chauvet wrote:
> From: Arthur Grillo <arthurgrillo@...eup.net>
> 
> Remove intermidiary variables and access the variables directly from
> drm_frame. These changes should be noop.
> 
> Signed-off-by: Arthur Grillo <arthurgrillo@...eup.net>
> Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
> ---
>   drivers/gpu/drm/vkms/vkms_drv.h       |  3 ---
>   drivers/gpu/drm/vkms/vkms_formats.c   | 12 +++++++-----
>   drivers/gpu/drm/vkms/vkms_plane.c     |  3 ---
>   drivers/gpu/drm/vkms/vkms_writeback.c |  5 -----
>   4 files changed, 7 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/gpu/drm/vkms/vkms_drv.h b/drivers/gpu/drm/vkms/vkms_drv.h
> index 8f5710debb1e..b4b357447292 100644
> --- a/drivers/gpu/drm/vkms/vkms_drv.h
> +++ b/drivers/gpu/drm/vkms/vkms_drv.h
> @@ -31,9 +31,6 @@ struct vkms_frame_info {
>   	struct drm_rect rotated;
>   	struct iosys_map map[DRM_FORMAT_MAX_PLANES];
>   	unsigned int rotation;
> -	unsigned int offset;
> -	unsigned int pitch;
> -	unsigned int cpp;
>   };
>   
>   struct pixel_argb_u16 {
> diff --git a/drivers/gpu/drm/vkms/vkms_formats.c b/drivers/gpu/drm/vkms/vkms_formats.c
> index 36046b12f296..172830a3936a 100644
> --- a/drivers/gpu/drm/vkms/vkms_formats.c
> +++ b/drivers/gpu/drm/vkms/vkms_formats.c
> @@ -11,8 +11,10 @@
>   
>   static size_t pixel_offset(const struct vkms_frame_info *frame_info, int x, int y)
>   {
> -	return frame_info->offset + (y * frame_info->pitch)
> -				  + (x * frame_info->cpp);
> +	struct drm_framebuffer *fb = frame_info->fb;
> +
> +	return fb->offsets[0] + (y * fb->pitches[0])
> +			      + (x * fb->format->cpp[0]);

Nitpicking: Could this be packed into a single line?

Anyway,

Reviewed-by: Maíra Canal <mcanal@...lia.com>

Best Regards,
- Maíra

>   }
>   
>   /*
> @@ -131,12 +133,12 @@ void vkms_compose_row(struct line_buffer *stage_buffer, struct vkms_plane_state
>   	u8 *src_pixels = get_packed_src_addr(frame_info, y);
>   	int limit = min_t(size_t, drm_rect_width(&frame_info->dst), stage_buffer->n_pixels);
>   
> -	for (size_t x = 0; x < limit; x++, src_pixels += frame_info->cpp) {
> +	for (size_t x = 0; x < limit; x++, src_pixels += frame_info->fb->format->cpp[0]) {
>   		int x_pos = get_x_position(frame_info, limit, x);
>   
>   		if (drm_rotation_90_or_270(frame_info->rotation))
>   			src_pixels = get_packed_src_addr(frame_info, x + frame_info->rotated.y1)
> -				+ frame_info->cpp * y;
> +				+ frame_info->fb->format->cpp[0] * y;
>   
>   		plane->pixel_read(src_pixels, &out_pixels[x_pos]);
>   	}
> @@ -223,7 +225,7 @@ void vkms_writeback_row(struct vkms_writeback_job *wb,
>   	struct pixel_argb_u16 *in_pixels = src_buffer->pixels;
>   	int x_limit = min_t(size_t, drm_rect_width(&frame_info->dst), src_buffer->n_pixels);
>   
> -	for (size_t x = 0; x < x_limit; x++, dst_pixels += frame_info->cpp)
> +	for (size_t x = 0; x < x_limit; x++, dst_pixels += frame_info->fb->format->cpp[0])
>   		wb->pixel_write(dst_pixels, &in_pixels[x]);
>   }
>   
> diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
> index 5a8d295e65f2..21b5adfb44aa 100644
> --- a/drivers/gpu/drm/vkms/vkms_plane.c
> +++ b/drivers/gpu/drm/vkms/vkms_plane.c
> @@ -125,9 +125,6 @@ static void vkms_plane_atomic_update(struct drm_plane *plane,
>   	drm_rect_rotate(&frame_info->rotated, drm_rect_width(&frame_info->rotated),
>   			drm_rect_height(&frame_info->rotated), frame_info->rotation);
>   
> -	frame_info->offset = fb->offsets[0];
> -	frame_info->pitch = fb->pitches[0];
> -	frame_info->cpp = fb->format->cpp[0];
>   	vkms_plane_state->pixel_read = get_pixel_conversion_function(fmt);
>   }
>   
> diff --git a/drivers/gpu/drm/vkms/vkms_writeback.c b/drivers/gpu/drm/vkms/vkms_writeback.c
> index bc724cbd5e3a..c8582df1f739 100644
> --- a/drivers/gpu/drm/vkms/vkms_writeback.c
> +++ b/drivers/gpu/drm/vkms/vkms_writeback.c
> @@ -149,11 +149,6 @@ static void vkms_wb_atomic_commit(struct drm_connector *conn,
>   	crtc_state->active_writeback = active_wb;
>   	crtc_state->wb_pending = true;
>   	spin_unlock_irq(&output->composer_lock);
> -
> -	wb_frame_info->offset = fb->offsets[0];
> -	wb_frame_info->pitch = fb->pitches[0];
> -	wb_frame_info->cpp = fb->format->cpp[0];
> -
>   	drm_writeback_queue_job(wb_conn, connector_state);
>   	active_wb->pixel_write = get_pixel_write_function(wb_format);
>   	drm_rect_init(&wb_frame_info->src, 0, 0, crtc_width, crtc_height);
>