1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright © 2006-2009 Intel Corporation
24 /* The max/min PWM frequency in BPCR[31:17] - */
26  * 15-bit field of the and then*/
27 /* shifts to the left by one bit to get the actual 16-bit
28  * value that the 15-bits correspond to.*/
51 		dev_priv->is_lvds_on = true;  in oaktrail_lvds_set_power()
52 		if (dev_priv->ops->lvds_bl_power)  in oaktrail_lvds_set_power()
53 			dev_priv->ops->lvds_bl_power(dev, true);  in oaktrail_lvds_set_power()
55 		if (dev_priv->ops->lvds_bl_power)  in oaktrail_lvds_set_power()
56 			dev_priv->ops->lvds_bl_power(dev, false);  in oaktrail_lvds_set_power()
62 		dev_priv->is_lvds_on = false;  in oaktrail_lvds_set_power()
67 static void oaktrail_lvds_dpms(struct drm_encoder *encoder, int mode)  in oaktrail_lvds_dpms()  argument
69 	struct drm_device *dev = encoder->dev;  in oaktrail_lvds_dpms()
70 	struct gma_encoder *gma_encoder = to_gma_encoder(encoder);  in oaktrail_lvds_dpms()
77 	/* XXX: We never power down the LVDS pairs. */  in oaktrail_lvds_dpms()
80 static void oaktrail_lvds_mode_set(struct drm_encoder *encoder,  in oaktrail_lvds_mode_set()  argument
84 	struct drm_device *dev = encoder->dev;  in oaktrail_lvds_mode_set()
86 	struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;  in oaktrail_lvds_mode_set()
89 	struct drm_crtc *crtc = encoder->crtc;  in oaktrail_lvds_mode_set()
97 	 * The LVDS pin pair will already have been turned on in the  in oaktrail_lvds_mode_set()
101 	lvds_port = (REG_READ(LVDS) &  in oaktrail_lvds_mode_set()
108 	if (mode_dev->panel_wants_dither || dev_priv->lvds_dither)  in oaktrail_lvds_mode_set()
111 	REG_WRITE(LVDS, lvds_port);  in oaktrail_lvds_mode_set()
116 		if (connector->encoder && connector->encoder->crtc == crtc)  in oaktrail_lvds_mode_set()
127 	drm_object_property_get_value( &connector->base,  in oaktrail_lvds_mode_set()
128 		dev->mode_config.scaling_mode_property, &v);  in oaktrail_lvds_mode_set()
134 		if ((mode->vdisplay != adjusted_mode->crtc_vdisplay) ||  in oaktrail_lvds_mode_set()
135 		    (mode->hdisplay != adjusted_mode->crtc_hdisplay)) {  in oaktrail_lvds_mode_set()
136 			if ((adjusted_mode->crtc_hdisplay * mode->vdisplay) ==  in oaktrail_lvds_mode_set()
137 			    (mode->hdisplay * adjusted_mode->crtc_vdisplay))  in oaktrail_lvds_mode_set()
139 			else if ((adjusted_mode->crtc_hdisplay *  in oaktrail_lvds_mode_set()
140 				mode->vdisplay) > (mode->hdisplay *  in oaktrail_lvds_mode_set()
141 				adjusted_mode->crtc_vdisplay))  in oaktrail_lvds_mode_set()
155 static void oaktrail_lvds_prepare(struct drm_encoder *encoder)  in oaktrail_lvds_prepare()  argument
157 	struct drm_device *dev = encoder->dev;  in oaktrail_lvds_prepare()
159 	struct gma_encoder *gma_encoder = to_gma_encoder(encoder);  in oaktrail_lvds_prepare()
160 	struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;  in oaktrail_lvds_prepare()
165 	mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);  in oaktrail_lvds_prepare()
166 	mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL &  in oaktrail_lvds_prepare()
184 		ret = ((dev_priv->regs.saveBLC_PWM_CTL &  in oaktrail_lvds_get_max_backlight()
191 static void oaktrail_lvds_commit(struct drm_encoder *encoder)  in oaktrail_lvds_commit()  argument
193 	struct drm_device *dev = encoder->dev;  in oaktrail_lvds_commit()
195 	struct gma_encoder *gma_encoder = to_gma_encoder(encoder);  in oaktrail_lvds_commit()
196 	struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;  in oaktrail_lvds_commit()
198 	if (mode_dev->backlight_duty_cycle == 0)  in oaktrail_lvds_commit()
199 		mode_dev->backlight_duty_cycle =  in oaktrail_lvds_commit()
219 	struct oaktrail_timing_info *ti = &dev_priv->gct_data.DTD;  in oaktrail_lvds_get_configuration_mode()
221 	mode_dev->panel_fixed_mode = NULL;  in oaktrail_lvds_get_configuration_mode()
224 	if (dev_priv->has_gct) {  in oaktrail_lvds_get_configuration_mode()
229 		mode->hdisplay = (ti->hactive_hi << 8) | ti->hactive_lo;  in oaktrail_lvds_get_configuration_mode()
230 		mode->vdisplay = (ti->vactive_hi << 8) | ti->vactive_lo;  in oaktrail_lvds_get_configuration_mode()
231 		mode->hsync_start = mode->hdisplay + \  in oaktrail_lvds_get_configuration_mode()
232 				((ti->hsync_offset_hi << 8) | \  in oaktrail_lvds_get_configuration_mode()
233 				ti->hsync_offset_lo);  in oaktrail_lvds_get_configuration_mode()
234 		mode->hsync_end = mode->hsync_start + \  in oaktrail_lvds_get_configuration_mode()
235 				((ti->hsync_pulse_width_hi << 8) | \  in oaktrail_lvds_get_configuration_mode()
236 				ti->hsync_pulse_width_lo);  in oaktrail_lvds_get_configuration_mode()
237 		mode->htotal = mode->hdisplay + ((ti->hblank_hi << 8) | \  in oaktrail_lvds_get_configuration_mode()
238 							ti->hblank_lo);  in oaktrail_lvds_get_configuration_mode()
239 		mode->vsync_start = \  in oaktrail_lvds_get_configuration_mode()
240 			mode->vdisplay + ((ti->vsync_offset_hi << 4) | \  in oaktrail_lvds_get_configuration_mode()
241 						ti->vsync_offset_lo);  in oaktrail_lvds_get_configuration_mode()
242 		mode->vsync_end = \  in oaktrail_lvds_get_configuration_mode()
243 			mode->vsync_start + ((ti->vsync_pulse_width_hi << 4) | \  in oaktrail_lvds_get_configuration_mode()
244 						ti->vsync_pulse_width_lo);  in oaktrail_lvds_get_configuration_mode()
245 		mode->vtotal = mode->vdisplay + \  in oaktrail_lvds_get_configuration_mode()
246 				((ti->vblank_hi << 8) | ti->vblank_lo);  in oaktrail_lvds_get_configuration_mode()
247 		mode->clock = ti->pixel_clock * 10;  in oaktrail_lvds_get_configuration_mode()
249 		pr_info("hdisplay is %d\n", mode->hdisplay);  in oaktrail_lvds_get_configuration_mode()
250 		pr_info("vdisplay is %d\n", mode->vdisplay);  in oaktrail_lvds_get_configuration_mode()
251 		pr_info("HSS is %d\n", mode->hsync_start);  in oaktrail_lvds_get_configuration_mode()
252 		pr_info("HSE is %d\n", mode->hsync_end);  in oaktrail_lvds_get_configuration_mode()
253 		pr_info("htotal is %d\n", mode->htotal);  in oaktrail_lvds_get_configuration_mode()
254 		pr_info("VSS is %d\n", mode->vsync_start);  in oaktrail_lvds_get_configuration_mode()
255 		pr_info("VSE is %d\n", mode->vsync_end);  in oaktrail_lvds_get_configuration_mode()
256 		pr_info("vtotal is %d\n", mode->vtotal);  in oaktrail_lvds_get_configuration_mode()
257 		pr_info("clock is %d\n", mode->clock);  in oaktrail_lvds_get_configuration_mode()
259 		mode_dev->panel_fixed_mode = mode;  in oaktrail_lvds_get_configuration_mode()
263 	if (mode_dev->panel_fixed_mode == NULL && mode_dev->vbt_mode)  in oaktrail_lvds_get_configuration_mode()
264 		mode_dev->panel_fixed_mode = drm_mode_duplicate(dev,  in oaktrail_lvds_get_configuration_mode()
265 						mode_dev->vbt_mode);  in oaktrail_lvds_get_configuration_mode()
267 	/* Then try the LVDS VBT mode */  in oaktrail_lvds_get_configuration_mode()
268 	if (mode_dev->panel_fixed_mode == NULL)  in oaktrail_lvds_get_configuration_mode()
269 		if (dev_priv->lfp_lvds_vbt_mode)  in oaktrail_lvds_get_configuration_mode()
270 			mode_dev->panel_fixed_mode =  in oaktrail_lvds_get_configuration_mode()
272 					dev_priv->lfp_lvds_vbt_mode);  in oaktrail_lvds_get_configuration_mode()
275 	if (mode_dev->panel_fixed_mode == NULL)  in oaktrail_lvds_get_configuration_mode()
278 	drm_mode_set_name(mode_dev->panel_fixed_mode);  in oaktrail_lvds_get_configuration_mode()
279 	drm_mode_set_crtcinfo(mode_dev->panel_fixed_mode, 0);  in oaktrail_lvds_get_configuration_mode()
283  * oaktrail_lvds_init - setup LVDS connectors on this device
287  * Create the connector, register the LVDS DDC bus, and try to figure out what
288  * modes we can display on the LVDS panel (if present).
297 	struct drm_encoder *encoder;  in oaktrail_lvds_init()  local
312 	connector = &gma_connector->base;  in oaktrail_lvds_init()
313 	encoder = &gma_encoder->base;  in oaktrail_lvds_init()
314 	dev_priv->is_lvds_on = true;  in oaktrail_lvds_init()
321 	ret = drm_simple_encoder_init(dev, encoder, DRM_MODE_ENCODER_LVDS);  in oaktrail_lvds_init()
326 	gma_encoder->type = INTEL_OUTPUT_LVDS;  in oaktrail_lvds_init()
328 	drm_encoder_helper_add(encoder, &oaktrail_lvds_helper_funcs);  in oaktrail_lvds_init()
331 	connector->display_info.subpixel_order = SubPixelHorizontalRGB;  in oaktrail_lvds_init()
332 	connector->interlace_allowed = false;  in oaktrail_lvds_init()
333 	connector->doublescan_allowed = false;  in oaktrail_lvds_init()
335 	drm_object_attach_property(&connector->base,  in oaktrail_lvds_init()
336 					dev->mode_config.scaling_mode_property,  in oaktrail_lvds_init()
338 	drm_object_attach_property(&connector->base,  in oaktrail_lvds_init()
339 					dev_priv->backlight_property,  in oaktrail_lvds_init()
342 	mode_dev->panel_wants_dither = false;  in oaktrail_lvds_init()
343 	if (dev_priv->has_gct)  in oaktrail_lvds_init()
344 		mode_dev->panel_wants_dither = (dev_priv->gct_data.  in oaktrail_lvds_init()
346         if (dev_priv->lvds_dither)  in oaktrail_lvds_init()
347                 mode_dev->panel_wants_dither = 1;  in oaktrail_lvds_init()
350 	 * LVDS discovery:  in oaktrail_lvds_init()
353 	 * 3) check to see if LVDS is already on  in oaktrail_lvds_init()
360 	mutex_lock(&dev->mode_config.mutex);  in oaktrail_lvds_init()
362 	i2c_adap = i2c_get_adapter(dev_priv->ops->i2c_bus);  in oaktrail_lvds_init()
366 	if (edid == NULL && dev_priv->lpc_gpio_base) {  in oaktrail_lvds_init()
369 			i2c_adap = &ddc_bus->base;  in oaktrail_lvds_init()
377 	 * but must instead set connector->ddc manually here.  in oaktrail_lvds_init()
379 	connector->ddc = i2c_adap;  in oaktrail_lvds_init()
390 		list_for_each_entry(scan, &connector->probed_modes, head) {  in oaktrail_lvds_init()
391 			if (scan->type & DRM_MODE_TYPE_PREFERRED) {  in oaktrail_lvds_init()
392 				mode_dev->panel_fixed_mode =  in oaktrail_lvds_init()
398 		dev_err(dev->dev, "No ddc adapter available!\n");  in oaktrail_lvds_init()
405 	if (mode_dev->panel_fixed_mode) {  in oaktrail_lvds_init()
406 		mode_dev->panel_fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;  in oaktrail_lvds_init()
411 	if (!mode_dev->panel_fixed_mode) {  in oaktrail_lvds_init()
412 		dev_err(dev->dev, "Found no modes on the lvds, ignoring the LVDS\n");  in oaktrail_lvds_init()
417 	mutex_unlock(&dev->mode_config.mutex);  in oaktrail_lvds_init()
422 	mutex_unlock(&dev->mode_config.mutex);  in oaktrail_lvds_init()
423 	gma_i2c_destroy(to_gma_i2c_chan(connector->ddc));  in oaktrail_lvds_init()
424 	drm_encoder_cleanup(encoder);  in oaktrail_lvds_init()