1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright © 2006-2009 Intel Corporation
14 #include <asm/intel-mid.h>
22 /* The max/min PWM frequency in BPCR[31:17] - */
24  * 15-bit field of the and then*/
25 /* shifts to the left by one bit to get the actual 16-bit
26  * value that the 15-bits correspond to.*/
31  * Sets the power state for the panel.
38 	struct drm_psb_private *dev_priv = dev->dev_private;  in oaktrail_lvds_set_power()
49 		dev_priv->is_lvds_on = true;  in oaktrail_lvds_set_power()
50 		if (dev_priv->ops->lvds_bl_power)  in oaktrail_lvds_set_power()
51 			dev_priv->ops->lvds_bl_power(dev, true);  in oaktrail_lvds_set_power()
53 		if (dev_priv->ops->lvds_bl_power)  in oaktrail_lvds_set_power()
54 			dev_priv->ops->lvds_bl_power(dev, false);  in oaktrail_lvds_set_power()
60 		dev_priv->is_lvds_on = false;  in oaktrail_lvds_set_power()
61 		pm_request_idle(&dev->pdev->dev);  in oaktrail_lvds_set_power()
68 	struct drm_device *dev = encoder->dev;  in oaktrail_lvds_dpms()
76 	/* XXX: We never power down the LVDS pairs. */  in oaktrail_lvds_dpms()
83 	struct drm_device *dev = encoder->dev;  in oaktrail_lvds_mode_set()
84 	struct drm_psb_private *dev_priv = dev->dev_private;  in oaktrail_lvds_mode_set()
85 	struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;  in oaktrail_lvds_mode_set()
86 	struct drm_mode_config *mode_config = &dev->mode_config;  in oaktrail_lvds_mode_set()
88 	struct drm_crtc *crtc = encoder->crtc;  in oaktrail_lvds_mode_set()
96 	 * The LVDS pin pair will already have been turned on in the  in oaktrail_lvds_mode_set()
100 	lvds_port = (REG_READ(LVDS) &  in oaktrail_lvds_mode_set()
107 	if (mode_dev->panel_wants_dither || dev_priv->lvds_dither)  in oaktrail_lvds_mode_set()
110 	REG_WRITE(LVDS, lvds_port);  in oaktrail_lvds_mode_set()
113 	list_for_each_entry(connector, &mode_config->connector_list, head) {  in oaktrail_lvds_mode_set()
114 		if (!connector->encoder || connector->encoder->crtc != crtc)  in oaktrail_lvds_mode_set()
124 		&connector->base,  in oaktrail_lvds_mode_set()
125 		dev->mode_config.scaling_mode_property,  in oaktrail_lvds_mode_set()
131 		if ((mode->vdisplay != adjusted_mode->crtc_vdisplay) ||  in oaktrail_lvds_mode_set()
132 		    (mode->hdisplay != adjusted_mode->crtc_hdisplay)) {  in oaktrail_lvds_mode_set()
133 			if ((adjusted_mode->crtc_hdisplay * mode->vdisplay) ==  in oaktrail_lvds_mode_set()
134 			    (mode->hdisplay * adjusted_mode->crtc_vdisplay))  in oaktrail_lvds_mode_set()
136 			else if ((adjusted_mode->crtc_hdisplay *  in oaktrail_lvds_mode_set()
137 				mode->vdisplay) > (mode->hdisplay *  in oaktrail_lvds_mode_set()
138 				adjusted_mode->crtc_vdisplay))  in oaktrail_lvds_mode_set()
154 	struct drm_device *dev = encoder->dev;  in oaktrail_lvds_prepare()
155 	struct drm_psb_private *dev_priv = dev->dev_private;  in oaktrail_lvds_prepare()
157 	struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;  in oaktrail_lvds_prepare()
162 	mode_dev->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);  in oaktrail_lvds_prepare()
163 	mode_dev->backlight_duty_cycle = (mode_dev->saveBLC_PWM_CTL &  in oaktrail_lvds_prepare()
171 	struct drm_psb_private *dev_priv = dev->dev_private;  in oaktrail_lvds_get_max_backlight()
181 		ret = ((dev_priv->regs.saveBLC_PWM_CTL &  in oaktrail_lvds_get_max_backlight()
190 	struct drm_device *dev = encoder->dev;  in oaktrail_lvds_commit()
191 	struct drm_psb_private *dev_priv = dev->dev_private;  in oaktrail_lvds_commit()
193 	struct psb_intel_mode_device *mode_dev = &dev_priv->mode_dev;  in oaktrail_lvds_commit()
195 	if (mode_dev->backlight_duty_cycle == 0)  in oaktrail_lvds_commit()
196 		mode_dev->backlight_duty_cycle =  in oaktrail_lvds_commit()
209 /* Returns the panel fixed mode from configuration. */
215 	struct drm_psb_private *dev_priv = dev->dev_private;  in oaktrail_lvds_get_configuration_mode()
216 	struct oaktrail_timing_info *ti = &dev_priv->gct_data.DTD;  in oaktrail_lvds_get_configuration_mode()
218 	mode_dev->panel_fixed_mode = NULL;  in oaktrail_lvds_get_configuration_mode()
221 	if (dev_priv->has_gct) {  in oaktrail_lvds_get_configuration_mode()
226 		mode->hdisplay = (ti->hactive_hi << 8) | ti->hactive_lo;  in oaktrail_lvds_get_configuration_mode()
227 		mode->vdisplay = (ti->vactive_hi << 8) | ti->vactive_lo;  in oaktrail_lvds_get_configuration_mode()
228 		mode->hsync_start = mode->hdisplay + \  in oaktrail_lvds_get_configuration_mode()
229 				((ti->hsync_offset_hi << 8) | \  in oaktrail_lvds_get_configuration_mode()
230 				ti->hsync_offset_lo);  in oaktrail_lvds_get_configuration_mode()
231 		mode->hsync_end = mode->hsync_start + \  in oaktrail_lvds_get_configuration_mode()
232 				((ti->hsync_pulse_width_hi << 8) | \  in oaktrail_lvds_get_configuration_mode()
233 				ti->hsync_pulse_width_lo);  in oaktrail_lvds_get_configuration_mode()
234 		mode->htotal = mode->hdisplay + ((ti->hblank_hi << 8) | \  in oaktrail_lvds_get_configuration_mode()
235 							ti->hblank_lo);  in oaktrail_lvds_get_configuration_mode()
236 		mode->vsync_start = \  in oaktrail_lvds_get_configuration_mode()
237 			mode->vdisplay + ((ti->vsync_offset_hi << 4) | \  in oaktrail_lvds_get_configuration_mode()
238 						ti->vsync_offset_lo);  in oaktrail_lvds_get_configuration_mode()
239 		mode->vsync_end = \  in oaktrail_lvds_get_configuration_mode()
240 			mode->vsync_start + ((ti->vsync_pulse_width_hi << 4) | \  in oaktrail_lvds_get_configuration_mode()
241 						ti->vsync_pulse_width_lo);  in oaktrail_lvds_get_configuration_mode()
242 		mode->vtotal = mode->vdisplay + \  in oaktrail_lvds_get_configuration_mode()
243 				((ti->vblank_hi << 8) | ti->vblank_lo);  in oaktrail_lvds_get_configuration_mode()
244 		mode->clock = ti->pixel_clock * 10;  in oaktrail_lvds_get_configuration_mode()
246 		pr_info("hdisplay is %d\n", mode->hdisplay);  in oaktrail_lvds_get_configuration_mode()
247 		pr_info("vdisplay is %d\n", mode->vdisplay);  in oaktrail_lvds_get_configuration_mode()
248 		pr_info("HSS is %d\n", mode->hsync_start);  in oaktrail_lvds_get_configuration_mode()
249 		pr_info("HSE is %d\n", mode->hsync_end);  in oaktrail_lvds_get_configuration_mode()
250 		pr_info("htotal is %d\n", mode->htotal);  in oaktrail_lvds_get_configuration_mode()
251 		pr_info("VSS is %d\n", mode->vsync_start);  in oaktrail_lvds_get_configuration_mode()
252 		pr_info("VSE is %d\n", mode->vsync_end);  in oaktrail_lvds_get_configuration_mode()
253 		pr_info("vtotal is %d\n", mode->vtotal);  in oaktrail_lvds_get_configuration_mode()
254 		pr_info("clock is %d\n", mode->clock);  in oaktrail_lvds_get_configuration_mode()
256 		mode_dev->panel_fixed_mode = mode;  in oaktrail_lvds_get_configuration_mode()
260 	if (mode_dev->panel_fixed_mode == NULL && mode_dev->vbt_mode)  in oaktrail_lvds_get_configuration_mode()
261 		mode_dev->panel_fixed_mode = drm_mode_duplicate(dev,  in oaktrail_lvds_get_configuration_mode()
262 						mode_dev->vbt_mode);  in oaktrail_lvds_get_configuration_mode()
264 	/* Then try the LVDS VBT mode */  in oaktrail_lvds_get_configuration_mode()
265 	if (mode_dev->panel_fixed_mode == NULL)  in oaktrail_lvds_get_configuration_mode()
266 		if (dev_priv->lfp_lvds_vbt_mode)  in oaktrail_lvds_get_configuration_mode()
267 			mode_dev->panel_fixed_mode =  in oaktrail_lvds_get_configuration_mode()
269 					dev_priv->lfp_lvds_vbt_mode);  in oaktrail_lvds_get_configuration_mode()
272 	if (mode_dev->panel_fixed_mode == NULL)  in oaktrail_lvds_get_configuration_mode()
275 	drm_mode_set_name(mode_dev->panel_fixed_mode);  in oaktrail_lvds_get_configuration_mode()
276 	drm_mode_set_crtcinfo(mode_dev->panel_fixed_mode, 0);  in oaktrail_lvds_get_configuration_mode()
280  * oaktrail_lvds_init - setup LVDS connectors on this device
283  * Create the connector, register the LVDS DDC bus, and try to figure out what
284  * modes we can display on the LVDS panel (if present).
293 	struct drm_psb_private *dev_priv = dev->dev_private;  in oaktrail_lvds_init()
306 	connector = &gma_connector->base;  in oaktrail_lvds_init()
307 	encoder = &gma_encoder->base;  in oaktrail_lvds_init()
308 	dev_priv->is_lvds_on = true;  in oaktrail_lvds_init()
317 	gma_encoder->type = INTEL_OUTPUT_LVDS;  in oaktrail_lvds_init()
322 	connector->display_info.subpixel_order = SubPixelHorizontalRGB;  in oaktrail_lvds_init()
323 	connector->interlace_allowed = false;  in oaktrail_lvds_init()
324 	connector->doublescan_allowed = false;  in oaktrail_lvds_init()
326 	drm_object_attach_property(&connector->base,  in oaktrail_lvds_init()
327 					dev->mode_config.scaling_mode_property,  in oaktrail_lvds_init()
329 	drm_object_attach_property(&connector->base,  in oaktrail_lvds_init()
330 					dev_priv->backlight_property,  in oaktrail_lvds_init()
333 	mode_dev->panel_wants_dither = false;  in oaktrail_lvds_init()
334 	if (dev_priv->has_gct)  in oaktrail_lvds_init()
335 		mode_dev->panel_wants_dither = (dev_priv->gct_data.  in oaktrail_lvds_init()
337         if (dev_priv->lvds_dither)  in oaktrail_lvds_init()
338                 mode_dev->panel_wants_dither = 1;  in oaktrail_lvds_init()
341 	 * LVDS discovery:  in oaktrail_lvds_init()
344 	 * 3) check to see if LVDS is already on  in oaktrail_lvds_init()
345 	 *    if none of the above, no panel  in oaktrail_lvds_init()
351 	mutex_lock(&dev->mode_config.mutex);  in oaktrail_lvds_init()
352 	i2c_adap = i2c_get_adapter(dev_priv->ops->i2c_bus);  in oaktrail_lvds_init()
355 	if (edid == NULL && dev_priv->lpc_gpio_base) {  in oaktrail_lvds_init()
357 		if (gma_encoder->ddc_bus != NULL) {  in oaktrail_lvds_init()
358 			i2c_adap = &gma_encoder->ddc_bus->adapter;  in oaktrail_lvds_init()
363 	 * Attempt to get the fixed panel mode from DDC.  Assume that the  in oaktrail_lvds_init()
371 		list_for_each_entry(scan, &connector->probed_modes, head) {  in oaktrail_lvds_init()
372 			if (scan->type & DRM_MODE_TYPE_PREFERRED) {  in oaktrail_lvds_init()
373 				mode_dev->panel_fixed_mode =  in oaktrail_lvds_init()
379 		dev_err(dev->dev, "No ddc adapter available!\n");  in oaktrail_lvds_init()
381 	 * If we didn't get EDID, try geting panel timing  in oaktrail_lvds_init()
386 	if (mode_dev->panel_fixed_mode) {  in oaktrail_lvds_init()
387 		mode_dev->panel_fixed_mode->type |= DRM_MODE_TYPE_PREFERRED;  in oaktrail_lvds_init()
392 	if (!mode_dev->panel_fixed_mode) {  in oaktrail_lvds_init()
393 		dev_err(dev->dev, "Found no modes on the lvds, ignoring the LVDS\n");  in oaktrail_lvds_init()
398 	mutex_unlock(&dev->mode_config.mutex);  in oaktrail_lvds_init()
404 	mutex_unlock(&dev->mode_config.mutex);  in oaktrail_lvds_init()
406 	dev_dbg(dev->dev, "No LVDS modes found, disabling.\n");  in oaktrail_lvds_init()
407 	if (gma_encoder->ddc_bus) {  in oaktrail_lvds_init()
408 		psb_intel_i2c_destroy(gma_encoder->ddc_bus);  in oaktrail_lvds_init()
409 		gma_encoder->ddc_bus = NULL;  in oaktrail_lvds_init()