1 // SPDX-License-Identifier: GPL-2.0+
17 	int src_offset = composer->offset + (y * composer->pitch)  in get_pixel_from_buffer()
18 				      + (x * composer->cpp);  in get_pixel_from_buffer()
26  * compute_crc - Compute CRC value on output frame
39 	int x_src = composer->src.x1 >> 16;  in compute_crc()
40 	int y_src = composer->src.y1 >> 16;  in compute_crc()
41 	int h_src = drm_rect_height(&composer->src) >> 16;  in compute_crc()
42 	int w_src = drm_rect_width(&composer->src) >> 16;  in compute_crc()
59 	pre_blend = (src * 255 + dst * (255 - alpha));  in blend_channel()
68  * alpha_blend - alpha blending equation
73  * is that pixel color values have been already pre-multiplied with the alpha
88  * x_blend - blending equation that ignores the pixel alpha
98  * blend - blend value at vaddr_src with value at vaddr_dst
103  * @pixel_blend: blending equation based on plane format
122 	int x_src = src_composer->src.x1 >> 16;  in blend()
123 	int y_src = src_composer->src.y1 >> 16;  in blend()
125 	int x_dst = src_composer->dst.x1;  in blend()
126 	int y_dst = src_composer->dst.y1;  in blend()
127 	int h_dst = drm_rect_height(&src_composer->dst);  in blend()
128 	int w_dst = drm_rect_width(&src_composer->dst);  in blend()
135 			offset_dst = dst_composer->offset  in blend()
136 				     + (i_dst * dst_composer->pitch)  in blend()
137 				     + (j_dst++ * dst_composer->cpp);  in blend()
138 			offset_src = src_composer->offset  in blend()
139 				     + (i * src_composer->pitch)  in blend()
140 				     + (j * src_composer->cpp);  in blend()
156 	struct drm_framebuffer *fb = &plane_composer->fb;  in compose_plane()
160 	if (WARN_ON(dma_buf_map_is_null(&primary_composer->map[0])))  in compose_plane()
163 	vaddr = plane_composer->map[0].vaddr;  in compose_plane()
165 	if (fb->format->format == DRM_FORMAT_ARGB8888)  in compose_plane()
177 	struct drm_framebuffer *fb = &primary_composer->fb;  in compose_active_planes()
183 		*vaddr_out = kzalloc(gem_obj->size, GFP_KERNEL);  in compose_active_planes()
186 			return -ENOMEM;  in compose_active_planes()
190 	if (WARN_ON(dma_buf_map_is_null(&primary_composer->map[0])))  in compose_active_planes()
191 		return -EINVAL;  in compose_active_planes()
193 	vaddr = primary_composer->map[0].vaddr;  in compose_active_planes()
195 	memcpy(*vaddr_out, vaddr, gem_obj->size);  in compose_active_planes()
198 	 * planes should be in z-order and compose them associatively:  in compose_active_planes()
199 	 * ((primary <- overlay) <- cursor)  in compose_active_planes()
201 	for (i = 1; i < crtc_state->num_active_planes; i++)  in compose_active_planes()
203 			      crtc_state->active_planes[i]->composer,  in compose_active_planes()
210  * vkms_composer_worker - ordered work_struct to compute CRC
223 	struct drm_crtc *crtc = crtc_state->base.crtc;  in vkms_composer_worker()
233 	spin_lock_irq(&out->composer_lock);  in vkms_composer_worker()
234 	frame_start = crtc_state->frame_start;  in vkms_composer_worker()
235 	frame_end = crtc_state->frame_end;  in vkms_composer_worker()
236 	crc_pending = crtc_state->crc_pending;  in vkms_composer_worker()
237 	wb_pending = crtc_state->wb_pending;  in vkms_composer_worker()
238 	crtc_state->frame_start = 0;  in vkms_composer_worker()
239 	crtc_state->frame_end = 0;  in vkms_composer_worker()
240 	crtc_state->crc_pending = false;  in vkms_composer_worker()
241 	spin_unlock_irq(&out->composer_lock);  in vkms_composer_worker()
250 	if (crtc_state->num_active_planes >= 1) {  in vkms_composer_worker()
251 		act_plane = crtc_state->active_planes[0];  in vkms_composer_worker()
252 		if (act_plane->base.base.plane->type == DRM_PLANE_TYPE_PRIMARY)  in vkms_composer_worker()
253 			primary_composer = act_plane->composer;  in vkms_composer_worker()
260 		vaddr_out = crtc_state->active_writeback->data[0].vaddr;  in vkms_composer_worker()
265 		if (ret == -EINVAL && !wb_pending)  in vkms_composer_worker()
273 		drm_writeback_signal_completion(&out->wb_connector, 0);  in vkms_composer_worker()
274 		spin_lock_irq(&out->composer_lock);  in vkms_composer_worker()
275 		crtc_state->wb_pending = false;  in vkms_composer_worker()
276 		spin_unlock_irq(&out->composer_lock);  in vkms_composer_worker()
307 		ret = -EINVAL;  in vkms_crc_parse_source()
320 		return -EINVAL;  in vkms_verify_crc_source()
333 		drm_crtc_vblank_get(&out->crtc);  in vkms_set_composer()
335 	spin_lock_irq(&out->lock);  in vkms_set_composer()
336 	old_enabled = out->composer_enabled;  in vkms_set_composer()
337 	out->composer_enabled = enabled;  in vkms_set_composer()
338 	spin_unlock_irq(&out->lock);  in vkms_set_composer()
341 		drm_crtc_vblank_put(&out->crtc);  in vkms_set_composer()