1 // SPDX-License-Identifier: MIT
13  * -0.5. That matches how the hardware calculates the scaling
14  * factors (from top-left of the first pixel to bottom-right
25  * The same behaviour is observed on pre-SKL platforms as well.
27  * Theory behind the formula (note that we ignore sub-pixel
33  * -0.5
42  * -0.5
43  * | -0.375 (initial phase)
52 	int phase = -0x8000;  in skl_scaler_calc_phase()
56 		phase += (sub - 1) * 0x8000 / sub;  in skl_scaler_calc_phase()
61 	 * Hardware initial phase limited to [-0.5:1.5].  in skl_scaler_calc_phase()
65 	WARN_ON(phase < -0x8000 || phase > 0x18000);  in skl_scaler_calc_phase()
98 		&crtc_state->scaler_state;  in skl_update_scaler()
99 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);  in skl_update_scaler()
100 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);  in skl_update_scaler()
102 		&crtc_state->hw.adjusted_mode;  in skl_update_scaler()
113 	 * Scaling/fitting not supported in IF-ID mode in GEN9+  in skl_update_scaler()
118 	if (DISPLAY_VER(dev_priv) >= 9 && crtc_state->hw.enable &&  in skl_update_scaler()
119 	    need_scaler && adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) {  in skl_update_scaler()
120 		drm_dbg_kms(&dev_priv->drm,  in skl_update_scaler()
121 			    "Pipe/Plane scaling not supported with IF-ID mode\n");  in skl_update_scaler()
122 		return -EINVAL;  in skl_update_scaler()
127 	 *  - free scaler binded to this plane/crtc  in skl_update_scaler()
128 	 *  - in order to do this, update crtc->scaler_usage  in skl_update_scaler()
132 	 * update to free the scaler is done in plane/panel-fit programming.  in skl_update_scaler()
133 	 * For this purpose crtc/plane_state->scaler_id isn't reset here.  in skl_update_scaler()
137 			scaler_state->scaler_users &= ~(1 << scaler_user);  in skl_update_scaler()
138 			scaler_state->scalers[*scaler_id].in_use = 0;  in skl_update_scaler()
140 			drm_dbg_kms(&dev_priv->drm,  in skl_update_scaler()
143 				    crtc->pipe, scaler_user, *scaler_id,  in skl_update_scaler()
144 				    scaler_state->scaler_users);  in skl_update_scaler()
145 			*scaler_id = -1;  in skl_update_scaler()
152 		drm_dbg_kms(&dev_priv->drm,  in skl_update_scaler()
154 		return -EINVAL;  in skl_update_scaler()
166 		drm_dbg_kms(&dev_priv->drm,  in skl_update_scaler()
169 			    crtc->pipe, scaler_user, src_w, src_h,  in skl_update_scaler()
171 		return -EINVAL;  in skl_update_scaler()
175 	scaler_state->scaler_users |= (1 << scaler_user);  in skl_update_scaler()
176 	drm_dbg_kms(&dev_priv->drm, "scaler_user index %u.%u: "  in skl_update_scaler()
177 		    "staged scaling request for %ux%u->%ux%u scaler_users = 0x%x\n",  in skl_update_scaler()
178 		    crtc->pipe, scaler_user, src_w, src_h, dst_w, dst_h,  in skl_update_scaler()
179 		    scaler_state->scaler_users);  in skl_update_scaler()
186 	const struct drm_display_mode *pipe_mode = &crtc_state->hw.pipe_mode;  in skl_update_scaler_crtc()
189 	if (crtc_state->pch_pfit.enabled) {  in skl_update_scaler_crtc()
190 		width = drm_rect_width(&crtc_state->pch_pfit.dst);  in skl_update_scaler_crtc()
191 		height = drm_rect_height(&crtc_state->pch_pfit.dst);  in skl_update_scaler_crtc()
193 		width = pipe_mode->crtc_hdisplay;  in skl_update_scaler_crtc()
194 		height = pipe_mode->crtc_vdisplay;  in skl_update_scaler_crtc()
196 	return skl_update_scaler(crtc_state, !crtc_state->hw.active,  in skl_update_scaler_crtc()
198 				 &crtc_state->scaler_state.scaler_id,  in skl_update_scaler_crtc()
199 				 crtc_state->pipe_src_w, crtc_state->pipe_src_h,  in skl_update_scaler_crtc()
201 				 crtc_state->pch_pfit.enabled);  in skl_update_scaler_crtc()
205  * skl_update_scaler_plane - Stages update to scaler state for a given plane.
210  *     0 - scaler_usage updated successfully
211  *    error - requested scaling cannot be supported or other error condition
217 		to_intel_plane(plane_state->uapi.plane);  in skl_update_scaler_plane()
218 	struct drm_i915_private *dev_priv = to_i915(intel_plane->base.dev);  in skl_update_scaler_plane()
219 	struct drm_framebuffer *fb = plane_state->hw.fb;  in skl_update_scaler_plane()
221 	bool force_detach = !fb || !plane_state->uapi.visible;  in skl_update_scaler_plane()
224 	/* Pre-gen11 and SDR planes always need a scaler for planar formats. */  in skl_update_scaler_plane()
225 	if (!icl_is_hdr_plane(dev_priv, intel_plane->id) &&  in skl_update_scaler_plane()
226 	    fb && intel_format_info_is_yuv_semiplanar(fb->format, fb->modifier))  in skl_update_scaler_plane()
230 				drm_plane_index(&intel_plane->base),  in skl_update_scaler_plane()
231 				&plane_state->scaler_id,  in skl_update_scaler_plane()
232 				drm_rect_width(&plane_state->uapi.src) >> 16,  in skl_update_scaler_plane()
233 				drm_rect_height(&plane_state->uapi.src) >> 16,  in skl_update_scaler_plane()
234 				drm_rect_width(&plane_state->uapi.dst),  in skl_update_scaler_plane()
235 				drm_rect_height(&plane_state->uapi.dst),  in skl_update_scaler_plane()
236 				fb ? fb->format : NULL,  in skl_update_scaler_plane()
237 				fb ? fb->modifier : 0,  in skl_update_scaler_plane()
240 	if (ret || plane_state->scaler_id < 0)  in skl_update_scaler_plane()
244 	if (plane_state->ckey.flags) {  in skl_update_scaler_plane()
245 		drm_dbg_kms(&dev_priv->drm,  in skl_update_scaler_plane()
246 			    "[PLANE:%d:%s] scaling with color key not allowed",  in skl_update_scaler_plane()
247 			    intel_plane->base.base.id,  in skl_update_scaler_plane()
248 			    intel_plane->base.name);  in skl_update_scaler_plane()
249 		return -EINVAL;  in skl_update_scaler_plane()
253 	switch (fb->format->format) {  in skl_update_scaler_plane()
287 		drm_dbg_kms(&dev_priv->drm,  in skl_update_scaler_plane()
288 			    "[PLANE:%d:%s] FB:%d unsupported scaling format 0x%x\n",  in skl_update_scaler_plane()
289 			    intel_plane->base.base.id, intel_plane->base.name,  in skl_update_scaler_plane()
290 			    fb->base.id, fb->format->format);  in skl_update_scaler_plane()
291 		return -EINVAL;  in skl_update_scaler_plane()
308  *  Theory behind setting nearest-neighbor integer scaling:
312  *  represents the coefficient set for a phase (0-16).
314  *         +------------+------------------------+------------------------+
316  *         +------------+------------------------+------------------------+
318  *         +------------+------------------------+------------------------+
320  *         +------------+------------------------+------------------------+
322  *         +------------+------------------------+------------------------+
324  *         +------------+------------------------+------------------------+
326  *         +------------+------------------------+------------------------+
328  *         +------------+------------------------+------------------------+
330  *         +------------+------------------------+------------------------+
332  *         +------------+------------------------+------------------------+
334  *         +------------+------------------------+------------------------+
336  *         +------------+------------------------+------------------------+
338  *  To enable nearest-neighbor scaling:  program scaler coefficents with
398 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);  in skl_pfit_enable()
399 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);  in skl_pfit_enable()
401 		&crtc_state->scaler_state;  in skl_pfit_enable()
403 		.x2 = crtc_state->pipe_src_w << 16,  in skl_pfit_enable()
404 		.y2 = crtc_state->pipe_src_h << 16,  in skl_pfit_enable()
406 	const struct drm_rect *dst = &crtc_state->pch_pfit.dst;  in skl_pfit_enable()
408 	enum pipe pipe = crtc->pipe;  in skl_pfit_enable()
411 	int x = dst->x1;  in skl_pfit_enable()
412 	int y = dst->y1;  in skl_pfit_enable()
418 	if (!crtc_state->pch_pfit.enabled)  in skl_pfit_enable()
421 	if (drm_WARN_ON(&dev_priv->drm,  in skl_pfit_enable()
422 			crtc_state->scaler_state.scaler_id < 0))  in skl_pfit_enable()
431 	id = scaler_state->scaler_id;  in skl_pfit_enable()
433 	ps_ctrl = skl_scaler_get_filter_select(crtc_state->hw.scaling_filter, 0);  in skl_pfit_enable()
434 	ps_ctrl |=  PS_SCALER_EN | scaler_state->scalers[id].mode;  in skl_pfit_enable()
436 	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);  in skl_pfit_enable()
439 				crtc_state->hw.scaling_filter);  in skl_pfit_enable()
452 	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);  in skl_pfit_enable()
460 	struct drm_i915_private *dev_priv = to_i915(plane->base.dev);  in skl_program_plane_scaler()
461 	const struct drm_framebuffer *fb = plane_state->hw.fb;  in skl_program_plane_scaler()
462 	enum pipe pipe = plane->pipe;  in skl_program_plane_scaler()
463 	int scaler_id = plane_state->scaler_id;  in skl_program_plane_scaler()
465 		&crtc_state->scaler_state.scalers[scaler_id];  in skl_program_plane_scaler()
466 	int crtc_x = plane_state->uapi.dst.x1;  in skl_program_plane_scaler()
467 	int crtc_y = plane_state->uapi.dst.y1;  in skl_program_plane_scaler()
468 	u32 crtc_w = drm_rect_width(&plane_state->uapi.dst);  in skl_program_plane_scaler()
469 	u32 crtc_h = drm_rect_height(&plane_state->uapi.dst);  in skl_program_plane_scaler()
475 	hscale = drm_rect_calc_hscale(&plane_state->uapi.src,  in skl_program_plane_scaler()
476 				      &plane_state->uapi.dst,  in skl_program_plane_scaler()
478 	vscale = drm_rect_calc_vscale(&plane_state->uapi.src,  in skl_program_plane_scaler()
479 				      &plane_state->uapi.dst,  in skl_program_plane_scaler()
482 	/* TODO: handle sub-pixel coordinates */  in skl_program_plane_scaler()
483 	if (intel_format_info_is_yuv_semiplanar(fb->format, fb->modifier) &&  in skl_program_plane_scaler()
484 	    !icl_is_hdr_plane(dev_priv, plane->id)) {  in skl_program_plane_scaler()
500 	ps_ctrl = skl_scaler_get_filter_select(plane_state->hw.scaling_filter, 0);  in skl_program_plane_scaler()
501 	ps_ctrl |= PS_SCALER_EN | PS_PLANE_SEL(plane->id) | scaler->mode;  in skl_program_plane_scaler()
504 				plane_state->hw.scaling_filter);  in skl_program_plane_scaler()
519 	struct drm_device *dev = crtc->base.dev;  in skl_detach_scaler()
523 	spin_lock_irqsave(&dev_priv->uncore.lock, irqflags);  in skl_detach_scaler()
525 	intel_de_write_fw(dev_priv, SKL_PS_CTRL(crtc->pipe, id), 0);  in skl_detach_scaler()
526 	intel_de_write_fw(dev_priv, SKL_PS_WIN_POS(crtc->pipe, id), 0);  in skl_detach_scaler()
527 	intel_de_write_fw(dev_priv, SKL_PS_WIN_SZ(crtc->pipe, id), 0);  in skl_detach_scaler()
529 	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);  in skl_detach_scaler()
537 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);  in skl_detach_scalers()
539 		&crtc_state->scaler_state;  in skl_detach_scalers()
543 	for (i = 0; i < crtc->num_scalers; i++) {  in skl_detach_scalers()
544 		if (!scaler_state->scalers[i].in_use)  in skl_detach_scalers()
551 	struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->uapi.crtc);  in skl_scaler_disable()
554 	for (i = 0; i < crtc->num_scalers; i++)  in skl_scaler_disable()