Re: [PATCH v3 08/12] drm/udl: Pass rectangle directly to udl_handle_damage()

Thomas Zimmermann
2022-09-08T12:47:59Z

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Hi

Am 08.09.22 um 11:51 schrieb Takashi Iwai:
> Just for some code simplification.
>
> Suggested-by: Thomas Zimmermann <tzimmermann@suse.de>
> Signed-off-by: Takashi Iwai <tiwai@suse.de>

With my comments fixed, you can add

Acked-by: Thomas Zimmermann <tzimmermann@suse.de>

> ---
> drivers/gpu/drm/udl/udl_modeset.c | 20 +++++++++-----------
> 1 file changed, 9 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/gpu/drm/udl/udl_modeset.c b/drivers/gpu/drm/udl/udl_modeset.c
> index c9b837ac26a7..0142fc6a478a 100644
> --- a/drivers/gpu/drm/udl/udl_modeset.c
> +++ b/drivers/gpu/drm/udl/udl_modeset.c
> @@ -244,14 +244,13 @@ static long udl_log_cpp(unsigned int cpp)
>
> static int udl_handle_damage(struct drm_framebuffer *fb,
> const struct iosys_map *map,
> - int x, int y, int width, int height)
> + struct drm_rect *clip)

Should probably be declared const.

> {
> struct drm_device *dev = fb->dev;
> void *vaddr = map->vaddr; /* TODO: Use mapping abstraction properly */
> int i, ret;
> char *cmd;
> struct urb *urb;
> - struct drm_rect clip;
> int log_bpp;
>
> ret = udl_log_cpp(fb->format->cpp[0]);
> @@ -259,8 +258,6 @@ static int udl_handle_damage(struct drm_framebuffer *fb,
> return ret;
> log_bpp = ret;
>
> - drm_rect_init(&clip, x, y, width, height);
> -
> ret = drm_gem_fb_begin_cpu_access(fb, DMA_FROM_DEVICE);
> if (ret)
> return ret;
> @@ -272,11 +269,11 @@ static int udl_handle_damage(struct drm_framebuffer *fb,
> }
> cmd = urb->transfer_buffer;
>
> - for (i = clip.y1; i < clip.y2; i++) {
> + for (i = clip->y1; i < clip->y2; i++) {
> const int line_offset = fb->pitches[0] * i;
> - const int byte_offset = line_offset + (clip.x1 << log_bpp);
> - const int dev_byte_offset = (fb->width * i + clip.x1) << log_bpp;
> - const int byte_width = (clip.x2 - clip.x1) << log_bpp;
> + const int byte_offset = line_offset + (clip->x1 << log_bpp);
> + const int dev_byte_offset = (fb->width * i + clip->x1) << log_bpp;
> + const int byte_width = (clip->x2 - clip->x1) << log_bpp;

Please use drm_rect_width(clip) instead. Somehow there's already too
much code that open-codes this.

> ret = udl_render_hline(dev, log_bpp, &urb, (char *)vaddr,
> &cmd, byte_offset, dev_byte_offset,
> byte_width);
> @@ -329,6 +326,7 @@ udl_simple_display_pipe_enable(struct drm_simple_display_pipe *pipe,
> struct udl_device *udl = to_udl(dev);
> struct drm_display_mode *mode = &crtc_state->mode;
> struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
> + struct drm_rect clip;

Better do a static init with DRM_RECT_INIT(0, 0, fb->width, fb->height)
and remove the other init call below.

Best regards
Thomas

> char *buf;
> char *wrptr;
> int color_depth = UDL_COLOR_DEPTH_16BPP;
> @@ -354,7 +352,8 @@ udl_simple_display_pipe_enable(struct drm_simple_display_pipe *pipe,
>
> udl->mode_buf_len = wrptr - buf;
>
> - udl_handle_damage(fb, &shadow_plane_state->data[0], 0, 0, fb->width, fb->height);
> + drm_rect_init(&clip, 0, 0, fb->width, fb->height);
> + udl_handle_damage(fb, &shadow_plane_state->data[0], &clip);
>
> /* enable display */
> udl_crtc_write_mode_to_hw(crtc);
> @@ -396,8 +395,7 @@ udl_simple_display_pipe_update(struct drm_simple_display_pipe *pipe,
> return;
>
> if (drm_atomic_helper_damage_merged(old_plane_state, state, &rect))
> - udl_handle_damage(fb, &shadow_plane_state->data[0], rect.x1, rect.y1,
> - rect.x2 - rect.x1, rect.y2 - rect.y1);
> + udl_handle_damage(fb, &shadow_plane_state->data[0], &rect);
> }
>
> static const struct drm_simple_display_pipe_funcs udl_simple_display_pipe_funcs = {

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

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