1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright © 2006-2011 Intel Corporation
12 #include <linux/i2c.h>
27  * LVDS I2C backlight control macros
72 		retval = ((dev_priv->regs.saveBLC_PWM_CTL &  in cdv_intel_lvds_get_max_backlight()
97 		blc_pwm_ctl = dev_priv->regs.saveBLC_PWM_CTL &  in cdv_intel_lvds_set_backlight()
99 		dev_priv->regs.saveBLC_PWM_CTL = (blc_pwm_ctl |  in cdv_intel_lvds_set_backlight()
124 				dev_priv->mode_dev.backlight_duty_cycle);  in cdv_intel_lvds_set_power()
139 	struct drm_device *dev = encoder->dev;  in cdv_intel_lvds_encoder_dpms()
158 	struct drm_device *dev = connector->dev;  in cdv_intel_lvds_mode_valid()
161 					dev_priv->mode_dev.panel_fixed_mode;  in cdv_intel_lvds_mode_valid()
164 	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)  in cdv_intel_lvds_mode_valid()
168 	if (mode->flags & DRM_MODE_FLAG_INTERLACE)  in cdv_intel_lvds_mode_valid()
172 		if (mode->hdisplay > fixed_mode->hdisplay)  in cdv_intel_lvds_mode_valid()
174 		if (mode->vdisplay > fixed_mode->vdisplay)  in cdv_intel_lvds_mode_valid()
184 	struct drm_device *dev = encoder->dev;  in cdv_intel_lvds_mode_fixup()
186 	struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;  in cdv_intel_lvds_mode_fixup()
188 	struct drm_display_mode *panel_fixed_mode = mode_dev->panel_fixed_mode;  in cdv_intel_lvds_mode_fixup()
191 	list_for_each_entry(tmp_encoder, &dev->mode_config.encoder_list,  in cdv_intel_lvds_mode_fixup()
194 		    && tmp_encoder->crtc == encoder->crtc) {  in cdv_intel_lvds_mode_fixup()
207 		adjusted_mode->hdisplay = panel_fixed_mode->hdisplay;  in cdv_intel_lvds_mode_fixup()
208 		adjusted_mode->hsync_start = panel_fixed_mode->hsync_start;  in cdv_intel_lvds_mode_fixup()
209 		adjusted_mode->hsync_end = panel_fixed_mode->hsync_end;  in cdv_intel_lvds_mode_fixup()
210 		adjusted_mode->htotal = panel_fixed_mode->htotal;  in cdv_intel_lvds_mode_fixup()
211 		adjusted_mode->vdisplay = panel_fixed_mode->vdisplay;  in cdv_intel_lvds_mode_fixup()
212 		adjusted_mode->vsync_start = panel_fixed_mode->vsync_start;  in cdv_intel_lvds_mode_fixup()
213 		adjusted_mode->vsync_end = panel_fixed_mode->vsync_end;  in cdv_intel_lvds_mode_fixup()
214 		adjusted_mode->vtotal = panel_fixed_mode->vtotal;  in cdv_intel_lvds_mode_fixup()
215 		adjusted_mode->clock = panel_fixed_mode->clock;  in cdv_intel_lvds_mode_fixup()
231 	struct drm_device *dev = encoder->dev;  in cdv_intel_lvds_prepare()
233 	struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;  in cdv_intel_lvds_prepare()
238 	mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);  in cdv_intel_lvds_prepare()
239 	mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL &  in cdv_intel_lvds_prepare()
249 	struct drm_device *dev = encoder->dev;  in cdv_intel_lvds_commit()
251 	struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;  in cdv_intel_lvds_commit()
253 	if (mode_dev->backlight_duty_cycle == 0)  in cdv_intel_lvds_commit()
254 		mode_dev->backlight_duty_cycle =  in cdv_intel_lvds_commit()
264 	struct drm_device *dev = encoder->dev;  in cdv_intel_lvds_mode_set()
266 	struct gma_crtc *gma_crtc = to_gma_crtc(encoder->crtc);  in cdv_intel_lvds_mode_set()
276 	 * Enable automatic panel scaling so that non-native modes fill the  in cdv_intel_lvds_mode_set()
280 	if (mode->hdisplay != adjusted_mode->hdisplay ||  in cdv_intel_lvds_mode_set()
281 	    mode->vdisplay != adjusted_mode->vdisplay)  in cdv_intel_lvds_mode_set()
288 	pfit_control |= gma_crtc->pipe << PFIT_PIPE_SHIFT;  in cdv_intel_lvds_mode_set()
290 	if (dev_priv->lvds_dither)  in cdv_intel_lvds_mode_set()
297  * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
301 	struct drm_device *dev = connector->dev;  in cdv_intel_lvds_get_modes()
303 	struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;  in cdv_intel_lvds_get_modes()
306 	ret = psb_intel_ddc_get_modes(connector, connector->ddc);  in cdv_intel_lvds_get_modes()
311 	if (mode_dev->panel_fixed_mode != NULL) {  in cdv_intel_lvds_get_modes()
313 		    drm_mode_duplicate(dev, mode_dev->panel_fixed_mode);  in cdv_intel_lvds_get_modes()
326 	gma_i2c_destroy(to_gma_i2c_chan(connector->ddc));  in cdv_intel_lvds_destroy()
327 	gma_i2c_destroy(gma_encoder->i2c_bus);  in cdv_intel_lvds_destroy()
336 	struct drm_encoder *encoder = connector->encoder;  in cdv_intel_lvds_set_property()
338 	if (!strcmp(property->name, "scaling mode") && encoder) {  in cdv_intel_lvds_set_property()
339 		struct gma_crtc *crtc = to_gma_crtc(encoder->crtc);  in cdv_intel_lvds_set_property()
343 			return -1;  in cdv_intel_lvds_set_property()
353 			return -1;  in cdv_intel_lvds_set_property()
356 		if (drm_object_property_get_value(&connector->base,  in cdv_intel_lvds_set_property()
359 			return -1;  in cdv_intel_lvds_set_property()
364 		if (drm_object_property_set_value(&connector->base,  in cdv_intel_lvds_set_property()
367 			return -1;  in cdv_intel_lvds_set_property()
369 		if (crtc->saved_mode.hdisplay != 0 &&  in cdv_intel_lvds_set_property()
370 		    crtc->saved_mode.vdisplay != 0) {  in cdv_intel_lvds_set_property()
371 			if (!drm_crtc_helper_set_mode(encoder->crtc,  in cdv_intel_lvds_set_property()
372 						      &crtc->saved_mode,  in cdv_intel_lvds_set_property()
373 						      encoder->crtc->x,  in cdv_intel_lvds_set_property()
374 						      encoder->crtc->y,  in cdv_intel_lvds_set_property()
375 						      encoder->crtc->primary->fb))  in cdv_intel_lvds_set_property()
376 				return -1;  in cdv_intel_lvds_set_property()
378 	} else if (!strcmp(property->name, "backlight") && encoder) {  in cdv_intel_lvds_set_property()
379 		if (drm_object_property_set_value(&connector->base,  in cdv_intel_lvds_set_property()
382 			return -1;  in cdv_intel_lvds_set_property()
384                         gma_backlight_set(encoder->dev, value);  in cdv_intel_lvds_set_property()
385 	} else if (!strcmp(property->name, "DPMS") && encoder) {  in cdv_intel_lvds_set_property()
387 					encoder->helper_private;  in cdv_intel_lvds_set_property()
388 		helpers->dpms(encoder, value);  in cdv_intel_lvds_set_property()
429 	if (!dev_priv->child_dev_num)  in lvds_is_present_in_vbt()
432 	for (i = 0; i < dev_priv->child_dev_num; i++) {  in lvds_is_present_in_vbt()
433 		struct child_device_config *child = dev_priv->child_dev + i;  in lvds_is_present_in_vbt()
439 		if (child->device_type != DEVICE_TYPE_INT_LFP &&  in lvds_is_present_in_vbt()
440 		    child->device_type != DEVICE_TYPE_LFP)  in lvds_is_present_in_vbt()
443 		if (child->i2c_pin)  in lvds_is_present_in_vbt()
444 		    *i2c_pin = child->i2c_pin;  in lvds_is_present_in_vbt()
448 		 * information from AIM blocks, a non-zero addin offset is  in lvds_is_present_in_vbt()
451 		if (child->addin_offset)  in lvds_is_present_in_vbt()
459 		if (dev_priv->opregion.vbt)  in lvds_is_present_in_vbt()
467  * cdv_intel_lvds_init - setup LVDS connectors on this device
471  * Create the connector, register the LVDS DDC bus, and try to figure out what
491 	if (!dev_priv->lvds_enabled_in_vbt)  in cdv_intel_lvds_init()
514 	gma_encoder->dev_priv = lvds_priv;  in cdv_intel_lvds_init()
516 	connector = &gma_connector->base;  in cdv_intel_lvds_init()
517 	gma_connector->save = cdv_intel_lvds_save;  in cdv_intel_lvds_init()
518 	gma_connector->restore = cdv_intel_lvds_restore;  in cdv_intel_lvds_init()
519 	encoder = &gma_encoder->base;  in cdv_intel_lvds_init()
521 	/* Set up the DDC bus. */  in cdv_intel_lvds_init()
524 		dev_printk(KERN_ERR, dev->dev,  in cdv_intel_lvds_init()
525 			   "DDC bus registration " "failed.\n");  in cdv_intel_lvds_init()
532 					  &ddc_bus->base);  in cdv_intel_lvds_init()
541 	gma_encoder->type = INTEL_OUTPUT_LVDS;  in cdv_intel_lvds_init()
546 	connector->display_info.subpixel_order = SubPixelHorizontalRGB;  in cdv_intel_lvds_init()
547 	connector->interlace_allowed = false;  in cdv_intel_lvds_init()
548 	connector->doublescan_allowed = false;  in cdv_intel_lvds_init()
551 	drm_object_attach_property(&connector->base,  in cdv_intel_lvds_init()
552 				      dev->mode_config.scaling_mode_property,  in cdv_intel_lvds_init()
554 	drm_object_attach_property(&connector->base,  in cdv_intel_lvds_init()
555 				      dev_priv->backlight_property,  in cdv_intel_lvds_init()
559 	 * Set up I2C bus  in cdv_intel_lvds_init()
562 	gma_encoder->i2c_bus = gma_i2c_create(dev, GPIOB, "LVDSBLC_B");  in cdv_intel_lvds_init()
563 	if (!gma_encoder->i2c_bus) {  in cdv_intel_lvds_init()
565 			dev->dev, "I2C bus registration failed.\n");  in cdv_intel_lvds_init()
568 	gma_encoder->i2c_bus->slave_addr = 0x2C;  in cdv_intel_lvds_init()
569 	dev_priv->lvds_i2c_bus = gma_encoder->i2c_bus;  in cdv_intel_lvds_init()
573 	 * 1) check for EDID on DDC  in cdv_intel_lvds_init()
582 	 * Attempt to get the fixed panel mode from DDC.  Assume that the  in cdv_intel_lvds_init()
585 	mutex_lock(&dev->mode_config.mutex);  in cdv_intel_lvds_init()
586 	psb_intel_ddc_get_modes(connector, &ddc_bus->base);  in cdv_intel_lvds_init()
588 	list_for_each_entry(scan, &connector->probed_modes, head) {  in cdv_intel_lvds_init()
589 		if (scan->type & DRM_MODE_TYPE_PREFERRED) {  in cdv_intel_lvds_init()
590 			mode_dev->panel_fixed_mode =  in cdv_intel_lvds_init()
597 	if (dev_priv->lfp_lvds_vbt_mode) {  in cdv_intel_lvds_init()
598 		mode_dev->panel_fixed_mode =  in cdv_intel_lvds_init()
599 			drm_mode_duplicate(dev, dev_priv->lfp_lvds_vbt_mode);  in cdv_intel_lvds_init()
600 		if (mode_dev->panel_fixed_mode) {  in cdv_intel_lvds_init()
601 			mode_dev->panel_fixed_mode->type |=  in cdv_intel_lvds_init()
616 		mode_dev->panel_fixed_mode =  in cdv_intel_lvds_init()
618 		if (mode_dev->panel_fixed_mode) {  in cdv_intel_lvds_init()
619 			mode_dev->panel_fixed_mode->type |=  in cdv_intel_lvds_init()
626 	if (!mode_dev->panel_fixed_mode) {  in cdv_intel_lvds_init()
646 	mutex_unlock(&dev->mode_config.mutex);  in cdv_intel_lvds_init()
650 	mutex_unlock(&dev->mode_config.mutex);  in cdv_intel_lvds_init()
651 	gma_i2c_destroy(gma_encoder->i2c_bus);  in cdv_intel_lvds_init()