diff options
Diffstat (limited to 'drivers/gpu/drm/vkms/vkms_composer.c')
| -rw-r--r-- | drivers/gpu/drm/vkms/vkms_composer.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/gpu/drm/vkms/vkms_composer.c b/drivers/gpu/drm/vkms/vkms_composer.c index e7441b227b3c..3f0977d746be 100644 --- a/drivers/gpu/drm/vkms/vkms_composer.c +++ b/drivers/gpu/drm/vkms/vkms_composer.c @@ -187,8 +187,15 @@ static void blend(struct vkms_writeback_job *wb, const struct pixel_argb_u16 background_color = { .a = 0xffff }; - size_t crtc_y_limit = crtc_state->base.crtc->mode.vdisplay; + size_t crtc_y_limit = crtc_state->base.mode.vdisplay; + /* + * The planes are composed line-by-line to avoid heavy memory usage. It is a necessary + * complexity to avoid poor blending performance. + * + * The function vkms_compose_row() is used to read a line, pixel-by-pixel, into the staging + * buffer. + */ for (size_t y = 0; y < crtc_y_limit; y++) { fill_background(&background_color, output_buffer); @@ -263,7 +270,7 @@ static int compose_active_planes(struct vkms_writeback_job *active_wb, if (WARN_ON(check_format_funcs(crtc_state, active_wb))) return -EINVAL; - line_width = crtc_state->base.crtc->mode.hdisplay; + line_width = crtc_state->base.mode.hdisplay; stage_buffer.n_pixels = line_width; output_buffer.n_pixels = line_width; |