Merge remote branch 'origin/modesetting-101' into modesetting-101

1 files changed, 472 insertions, 0 deletions

diff --git a/linux-core/intel_lvds.c b/linux-core/intel_lvds.c
new file mode 100644
index 00000000..e8670adc
--- /dev/null
+++ b/linux-core/intel_lvds.c
@@ -0,0 +1,472 @@
+/*
+ * Copyright © 2006-2007 Intel Corporation
+ * Copyright (c) 2006 Dave Airlie <airlied@linux.ie>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ *	Eric Anholt <eric@anholt.net>
+ *      Dave Airlie <airlied@linux.ie>
+ *      Jesse Barnes <jesse.barnes@intel.com>
+ */
+
+#include <linux/i2c.h>
+#include "drmP.h"
+#include "drm.h"
+#include "drm_crtc.h"
+#include "drm_edid.h"
+#include "intel_drv.h"
+#include "i915_drm.h"
+#include "i915_drv.h"
+
+/**
+ * Sets the backlight level.
+ *
+ * \param level backlight level, from 0 to intel_lvds_get_max_backlight().
+ */
+static void intel_lvds_set_backlight(struct drm_device *dev, int level)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	u32 blc_pwm_ctl;
+
+	blc_pwm_ctl = I915_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
+	I915_WRITE(BLC_PWM_CTL, (blc_pwm_ctl |
+				 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
+}
+
+/**
+ * Returns the maximum level of the backlight duty cycle field.
+ */
+static u32 intel_lvds_get_max_backlight(struct drm_device *dev)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+    
+	return ((I915_READ(BLC_PWM_CTL) & BACKLIGHT_MODULATION_FREQ_MASK) >>
+		BACKLIGHT_MODULATION_FREQ_SHIFT) * 2;
+}
+
+/**
+ * Sets the power state for the panel.
+ */
+static void intel_lvds_set_power(struct drm_device *dev, bool on)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	u32 pp_status;
+
+	if (on) {
+		I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) |
+			   POWER_TARGET_ON);
+		do {
+			pp_status = I915_READ(PP_STATUS);
+		} while ((pp_status & PP_ON) == 0);
+
+		intel_lvds_set_backlight(dev, dev_priv->backlight_duty_cycle);
+	} else {
+		intel_lvds_set_backlight(dev, 0);
+
+		I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) &
+			   ~POWER_TARGET_ON);
+		do {
+			pp_status = I915_READ(PP_STATUS);
+		} while (pp_status & PP_ON);
+	}
+}
+
+static void intel_lvds_dpms(struct drm_output *output, int mode)
+{
+	struct drm_device *dev = output->dev;
+
+	if (mode == DPMSModeOn)
+		intel_lvds_set_power(dev, true);
+	else
+		intel_lvds_set_power(dev, false);
+
+	/* XXX: We never power down the LVDS pairs. */
+}
+
+static void intel_lvds_save(struct drm_output *output)
+{
+	struct drm_device *dev = output->dev;
+	drm_i915_private_t *dev_priv = dev->dev_private;
+
+	dev_priv->savePP_ON = I915_READ(LVDSPP_ON);
+	dev_priv->savePP_OFF = I915_READ(LVDSPP_OFF);
+	dev_priv->savePP_CONTROL = I915_READ(PP_CONTROL);
+	dev_priv->savePP_CYCLE = I915_READ(PP_CYCLE);
+	dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL);
+	dev_priv->backlight_duty_cycle = (dev_priv->saveBLC_PWM_CTL &
+				       BACKLIGHT_DUTY_CYCLE_MASK);
+
+	/*
+	 * If the light is off at server startup, just make it full brightness
+	 */
+	if (dev_priv->backlight_duty_cycle == 0)
+		dev_priv->backlight_duty_cycle =
+			intel_lvds_get_max_backlight(dev);
+}
+
+static void intel_lvds_restore(struct drm_output *output)
+{
+	struct drm_device *dev = output->dev;
+	drm_i915_private_t *dev_priv = dev->dev_private;
+
+	I915_WRITE(BLC_PWM_CTL, dev_priv->saveBLC_PWM_CTL);
+	I915_WRITE(LVDSPP_ON, dev_priv->savePP_ON);
+	I915_WRITE(LVDSPP_OFF, dev_priv->savePP_OFF);
+	I915_WRITE(PP_CYCLE, dev_priv->savePP_CYCLE);
+	I915_WRITE(PP_CONTROL, dev_priv->savePP_CONTROL);
+	if (dev_priv->savePP_CONTROL & POWER_TARGET_ON)
+		intel_lvds_set_power(dev, true);
+	else
+		intel_lvds_set_power(dev, false);
+}
+
+static int intel_lvds_mode_valid(struct drm_output *output,
+				 struct drm_display_mode *mode)
+{
+	struct drm_device *dev = output->dev;
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	struct drm_display_mode *fixed_mode = dev_priv->panel_fixed_mode;
+
+	if (fixed_mode)	{
+		if (mode->hdisplay > fixed_mode->hdisplay)
+			return MODE_PANEL;
+		if (mode->vdisplay > fixed_mode->vdisplay)
+			return MODE_PANEL;
+	}
+
+	return MODE_OK;
+}
+
+static bool intel_lvds_mode_fixup(struct drm_output *output,
+				  struct drm_display_mode *mode,
+				  struct drm_display_mode *adjusted_mode)
+{
+	struct drm_device *dev = output->dev;
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	struct intel_crtc *intel_crtc = output->crtc->driver_private;
+	struct drm_output *tmp_output;
+
+#if 0 /* FIXME: Check for other outputs on this pipe */
+	spin_lock(&dev->mode_config.config_lock);
+	list_for_each_entry(tmp_output, &dev->mode_config.output_list, head) {
+		if (tmp_output != output && tmp_output->crtc == output->crtc) {
+			printk(KERN_ERR "Can't enable LVDS and another "
+			       "output on the same pipe\n");
+			return false;
+		}
+	}
+	spin_lock(&dev->mode_config.config_lock);
+#endif
+
+	if (intel_crtc->pipe == 0) {
+		printk(KERN_ERR "Can't support LVDS on pipe A\n");
+		return false;
+	}
+
+	/*
+	 * If we have timings from the BIOS for the panel, put them in
+	 * to the adjusted mode.  The CRTC will be set up for this mode,
+	 * with the panel scaling set up to source from the H/VDisplay
+	 * of the original mode.
+	 */
+	if (dev_priv->panel_fixed_mode != NULL) {
+		adjusted_mode->hdisplay = dev_priv->panel_fixed_mode->hdisplay;
+		adjusted_mode->hsync_start =
+			dev_priv->panel_fixed_mode->hsync_start;
+		adjusted_mode->hsync_end =
+			dev_priv->panel_fixed_mode->hsync_end;
+		adjusted_mode->htotal = dev_priv->panel_fixed_mode->htotal;
+		adjusted_mode->vdisplay = dev_priv->panel_fixed_mode->vdisplay;
+		adjusted_mode->vsync_start =
+			dev_priv->panel_fixed_mode->vsync_start;
+		adjusted_mode->vsync_end =
+			dev_priv->panel_fixed_mode->vsync_end;
+		adjusted_mode->vtotal = dev_priv->panel_fixed_mode->vtotal;
+		adjusted_mode->clock = dev_priv->panel_fixed_mode->clock;
+		drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V);
+	}
+
+	/*
+	 * XXX: It would be nice to support lower refresh rates on the
+	 * panels to reduce power consumption, and perhaps match the
+	 * user's requested refresh rate.
+	 */
+
+	return true;
+}
+
+static void intel_lvds_mode_set(struct drm_output *output,
+				struct drm_display_mode *mode,
+				struct drm_display_mode *adjusted_mode)
+{
+	struct drm_device *dev = output->dev;
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	struct intel_crtc *intel_crtc = output->crtc->driver_private;
+	u32 pfit_control;
+
+	/*
+	 * The LVDS pin pair will already have been turned on in the
+	 * intel_crtc_mode_set since it has a large impact on the DPLL
+	 * settings.
+	 */
+
+	/*
+	 * Enable automatic panel scaling so that non-native modes fill the
+	 * screen.  Should be enabled before the pipe is enabled, according to
+	 * register description and PRM.
+	 */
+	pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
+			VERT_INTERP_BILINEAR | HORIZ_INTERP_BILINEAR);
+
+	if (!IS_I965G(dev)) {
+		if (dev_priv->panel_wants_dither)
+			pfit_control |= PANEL_8TO6_DITHER_ENABLE;
+	}
+	else
+		pfit_control |= intel_crtc->pipe << PFIT_PIPE_SHIFT;
+
+	I915_WRITE(PFIT_CONTROL, pfit_control);
+}
+
+/**
+ * Detect the LVDS connection.
+ *
+ * This always returns OUTPUT_STATUS_CONNECTED.  This output should only have
+ * been set up if the LVDS was actually connected anyway.
+ */
+static enum drm_output_status intel_lvds_detect(struct drm_output *output)
+{
+	return output_status_connected;
+}
+
+/**
+ * Return the list of DDC modes if available, or the BIOS fixed mode otherwise.
+ */
+static int intel_lvds_get_modes(struct drm_output *output)
+{
+	struct intel_output *intel_output = output->driver_private;
+	struct drm_device *dev = output->dev;
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	struct edid *edid_info;
+	int ret = 0;
+
+	intel_output->ddc_bus = intel_i2c_create(dev, GPIOC, "LVDSDDC_C");
+	if (!intel_output->ddc_bus) {
+		dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration "
+			   "failed.\n");
+		return 0;
+	}
+	ret = intel_ddc_get_modes(output);
+	intel_i2c_destroy(intel_output->ddc_bus);
+
+	if (ret)
+		return ret;
+
+	/* Didn't get an EDID */
+	if (!output->monitor_info) {
+		struct detailed_data_monitor_range *edid_range;
+		edid_info = kzalloc(sizeof(*output->monitor_info), GFP_KERNEL);
+		if (!edid_info)
+			goto out;
+
+		edid_info->detailed_timings[0].data.other_data.type =
+			EDID_DETAIL_MONITOR_RANGE;
+		edid_range = &edid_info->detailed_timings[0].data.other_data.data.range;
+
+		/* Set wide sync ranges so we get all modes
+		 * handed to valid_mode for checking
+		 */
+		edid_range->min_vfreq = 0;
+		edid_range->max_vfreq = 200;
+		edid_range->min_hfreq_khz = 0;
+		edid_range->max_hfreq_khz = 200;
+		output->monitor_info = edid_info;
+	}
+
+out:
+	if (dev_priv->panel_fixed_mode != NULL) {
+		struct drm_display_mode *mode =
+			drm_mode_duplicate(dev, dev_priv->panel_fixed_mode);
+		drm_mode_probed_add(output, mode);
+		return 1;
+	}
+
+	return 0;
+}
+
+static void intel_lvds_destroy(struct drm_output *output)
+{
+	if (output->driver_private)
+		kfree(output->driver_private);
+}
+
+static const struct drm_output_funcs intel_lvds_output_funcs = {
+	.dpms = intel_lvds_dpms,
+	.save = intel_lvds_save,
+	.restore = intel_lvds_restore,
+	.mode_valid = intel_lvds_mode_valid,
+	.mode_fixup = intel_lvds_mode_fixup,
+	.prepare = intel_output_prepare,
+	.mode_set = intel_lvds_mode_set,
+	.commit = intel_output_commit,
+	.detect = intel_lvds_detect,
+	.get_modes = intel_lvds_get_modes,
+	.cleanup = intel_lvds_destroy
+};
+
+/**
+ * intel_lvds_init - setup LVDS outputs on this device
+ * @dev: drm device
+ *
+ * Create the output, register the LVDS DDC bus, and try to figure out what
+ * modes we can display on the LVDS panel (if present).
+ */
+void intel_lvds_init(struct drm_device *dev)
+{
+	drm_i915_private_t *dev_priv = dev->dev_private;
+	struct drm_output *output;
+	struct intel_output *intel_output;
+	struct drm_display_mode *scan; /* *modes, *bios_mode; */
+
+	output = drm_output_create(dev, &intel_lvds_output_funcs, "LVDS");
+	if (!output)
+		return;
+
+	intel_output = kmalloc(sizeof(struct intel_output), GFP_KERNEL);
+	if (!intel_output) {
+		drm_output_destroy(output);
+		return;
+	}
+
+	intel_output->type = INTEL_OUTPUT_LVDS;
+	output->driver_private = intel_output;
+	output->subpixel_order = SubPixelHorizontalRGB;
+	output->interlace_allowed = FALSE;
+	output->doublescan_allowed = FALSE;
+
+	/* Set up the DDC bus. */
+	intel_output->ddc_bus = intel_i2c_create(dev, GPIOC, "LVDSDDC_C");
+	if (!intel_output->ddc_bus) {
+		dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration "
+			   "failed.\n");
+		return;
+	}
+
+	/*
+	 * Attempt to get the fixed panel mode from DDC.  Assume that the
+	 * preferred mode is the right one.
+	 */
+	intel_ddc_get_modes(output);
+	intel_i2c_destroy(intel_output->ddc_bus);
+	list_for_each_entry(scan, &output->probed_modes, head) {
+		if (scan->type & DRM_MODE_TYPE_PREFERRED) {
+			dev_priv->panel_fixed_mode = 
+				drm_mode_duplicate(dev, scan);
+			break;
+		}
+	}
+
+#if 0
+	/*
+	 * If we didn't get EDID, try checking if the panel is already turned
+	 * on.  If so, assume that whatever is currently programmed is the
+	 * correct mode.
+	 */
+	if (!dev_priv->panel_fixed_mode) {
+		u32 lvds = I915_READ(LVDS);
+		int pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0;
+		struct drm_mode_config *mode_config = &dev->mode_config;
+		struct drm_crtc *crtc;
+		/* FIXME: need drm_crtc_from_pipe */
+		//crtc = drm_crtc_from_pipe(mode_config, pipe);
+		
+		if (lvds & LVDS_PORT_EN && 0) {
+			dev_priv->panel_fixed_mode =
+				intel_crtc_mode_get(dev, crtc);
+			if (dev_priv->panel_fixed_mode)
+				dev_priv->panel_fixed_mode->type |=
+					DRM_MODE_TYPE_PREFERRED;
+		}
+	}
+
+/* No BIOS poking yet... */
+	/* Get the LVDS fixed mode out of the BIOS.  We should support LVDS
+	 * with the BIOS being unavailable or broken, but lack the
+	 * configuration options for now.
+	 */
+	bios_mode = intel_bios_get_panel_mode(pScrn);
+	if (bios_mode != NULL) {
+		if (dev_priv->panel_fixed_mode != NULL) {
+			if (dev_priv->debug_modes &&
+			    !xf86ModesEqual(dev_priv->panel_fixed_mode,
+					    bios_mode))
+			{
+				xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
+					   "BIOS panel mode data doesn't match probed data, "
+					   "continuing with probed.\n");
+				xf86DrvMsg(pScrn->scrnIndex, X_INFO, "BIOS mode:\n");
+				xf86PrintModeline(pScrn->scrnIndex, bios_mode);
+				xf86DrvMsg(pScrn->scrnIndex, X_INFO, "probed mode:\n");
+				xf86PrintModeline(pScrn->scrnIndex, dev_priv->panel_fixed_mode);
+				xfree(bios_mode->name);
+				xfree(bios_mode);
+			}
+		}  else {
+			dev_priv->panel_fixed_mode = bios_mode;
+		}
+	} else {
+		xf86DrvMsg(pScrn->scrnIndex, X_WARNING,
+			   "Couldn't detect panel mode.  Disabling panel\n");
+		goto disable_exit;
+	}
+
+	/* Blacklist machines with BIOSes that list an LVDS panel without actually
+	 * having one.
+	 */
+	if (dev_priv->PciInfo->chipType == PCI_CHIP_I945_GM) {
+		if (dev_priv->PciInfo->subsysVendor == 0xa0a0)  /* aopen mini pc */
+			goto disable_exit;
+
+		if ((dev_priv->PciInfo->subsysVendor == 0x8086) &&
+		    (dev_priv->PciInfo->subsysCard == 0x7270)) {
+			/* It's a Mac Mini or Macbook Pro.
+			 *
+			 * Apple hardware is out to get us.  The macbook pro has a real
+			 * LVDS panel, but the mac mini does not, and they have the same
+			 * device IDs.  We'll distinguish by panel size, on the assumption
+			 * that Apple isn't about to make any machines with an 800x600
+			 * display.
+			 */
+
+			if (dev_priv->panel_fixed_mode != NULL &&
+			    dev_priv->panel_fixed_mode->HDisplay == 800 &&
+			    dev_priv->panel_fixed_mode->VDisplay == 600)
+			{
+				xf86DrvMsg(pScrn->scrnIndex, X_INFO,
+					   "Suspected Mac Mini, ignoring the LVDS\n");
+				goto disable_exit;
+			}
+		}
+	}
+
+#endif
+	return;
+}