1 files changed, 376 insertions, 0 deletions
diff --git a/drivers/staging/gma500/cdv_intel_hdmi.c b/drivers/staging/gma500/cdv_intel_hdmi.c
new file mode 100644
index 000000000000..cbca2b0c7d58
--- /dev/null
+++ b/drivers/staging/gma500/cdv_intel_hdmi.c
@@ -0,0 +1,376 @@
+/*
+ * Copyright © 2006-2011 Intel Corporation
+ *
+ * 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:
+ *	jim liu <jim.liu@intel.com>
+ *
+ * FIXME:
+ *	We should probably make this generic and share it with Medfield
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm.h>
+#include <drm/drm_crtc.h>
+#include <drm/drm_edid.h>
+#include "psb_intel_drv.h"
+#include "psb_drv.h"
+#include "psb_intel_reg.h"
+#include <linux/pm_runtime.h>
+
+/* hdmi control bits */
+#define HDMI_NULL_PACKETS_DURING_VSYNC	(1 << 9)
+#define HDMI_BORDER_ENABLE		(1 << 7)
+#define HDMI_AUDIO_ENABLE		(1 << 6)
+#define HDMI_VSYNC_ACTIVE_HIGH		(1 << 4)
+#define HDMI_HSYNC_ACTIVE_HIGH		(1 << 3)
+/* hdmi-b control bits */
+#define	HDMIB_PIPE_B_SELECT		(1 << 30)
+
+
+struct mid_intel_hdmi_priv {
+	u32 hdmi_reg;
+	u32 save_HDMIB;
+	bool has_hdmi_sink;
+	bool has_hdmi_audio;
+	/* Should set this when detect hotplug */
+	bool hdmi_device_connected;
+	struct mdfld_hdmi_i2c *i2c_bus;
+	struct i2c_adapter *hdmi_i2c_adapter;	/* for control functions */
+	struct drm_device *dev;
+};
+
+static void cdv_hdmi_mode_set(struct drm_encoder *encoder,
+			struct drm_display_mode *mode,
+			struct drm_display_mode *adjusted_mode)
+{
+	struct drm_device *dev = encoder->dev;
+	struct psb_intel_output *output = enc_to_psb_intel_output(encoder);
+	struct mid_intel_hdmi_priv *hdmi_priv = output->dev_priv;
+	u32 hdmib;
+	struct drm_crtc *crtc = encoder->crtc;
+	struct psb_intel_crtc *intel_crtc = to_psb_intel_crtc(crtc);
+
+	hdmib = (2 << 10);
+
+	if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
+		hdmib |= HDMI_VSYNC_ACTIVE_HIGH;
+	if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
+		hdmib |= HDMI_HSYNC_ACTIVE_HIGH;
+
+	if (intel_crtc->pipe == 1)
+		hdmib |= HDMIB_PIPE_B_SELECT;
+
+	if (hdmi_priv->has_hdmi_audio) {
+		hdmib |= HDMI_AUDIO_ENABLE;
+		hdmib |= HDMI_NULL_PACKETS_DURING_VSYNC;
+	}
+
+	REG_WRITE(hdmi_priv->hdmi_reg, hdmib);
+	REG_READ(hdmi_priv->hdmi_reg);
+}
+
+static bool cdv_hdmi_mode_fixup(struct drm_encoder *encoder,
+				  struct drm_display_mode *mode,
+				  struct drm_display_mode *adjusted_mode)
+{
+	return true;
+}
+
+static void cdv_hdmi_dpms(struct drm_encoder *encoder, int mode)
+{
+	struct drm_device *dev = encoder->dev;
+	struct psb_intel_output *output = enc_to_psb_intel_output(encoder);
+	struct mid_intel_hdmi_priv *hdmi_priv = output->dev_priv;
+	u32 hdmib;
+
+	hdmib = REG_READ(hdmi_priv->hdmi_reg);
+
+	if (mode != DRM_MODE_DPMS_ON)
+		REG_WRITE(hdmi_priv->hdmi_reg, hdmib & ~HDMIB_PORT_EN);
+	else
+		REG_WRITE(hdmi_priv->hdmi_reg, hdmib | HDMIB_PORT_EN);
+	REG_READ(hdmi_priv->hdmi_reg);
+}
+
+static void cdv_hdmi_save(struct drm_connector *connector)
+{
+	struct drm_device *dev = connector->dev;
+	struct psb_intel_output *output = to_psb_intel_output(connector);
+	struct mid_intel_hdmi_priv *hdmi_priv = output->dev_priv;
+
+	hdmi_priv->save_HDMIB = REG_READ(hdmi_priv->hdmi_reg);
+}
+
+static void cdv_hdmi_restore(struct drm_connector *connector)
+{
+	struct drm_device *dev = connector->dev;
+	struct psb_intel_output *output = to_psb_intel_output(connector);
+	struct mid_intel_hdmi_priv *hdmi_priv = output->dev_priv;
+
+	REG_WRITE(hdmi_priv->hdmi_reg, hdmi_priv->save_HDMIB);
+	REG_READ(hdmi_priv->hdmi_reg);
+}
+
+static enum drm_connector_status cdv_hdmi_detect(
+				struct drm_connector *connector, bool force)
+{
+	struct psb_intel_output *psb_intel_output =
+						to_psb_intel_output(connector);
+	struct mid_intel_hdmi_priv *hdmi_priv = psb_intel_output->dev_priv;
+	struct edid *edid = NULL;
+	enum drm_connector_status status = connector_status_disconnected;
+
+	edid = drm_get_edid(&psb_intel_output->base,
+			 psb_intel_output->hdmi_i2c_adapter);
+
+	hdmi_priv->has_hdmi_sink = false;
+	hdmi_priv->has_hdmi_audio = false;
+	if (edid) {
+		if (edid->input & DRM_EDID_INPUT_DIGITAL) {
+			status = connector_status_connected;
+			hdmi_priv->has_hdmi_sink =
+						drm_detect_hdmi_monitor(edid);
+			hdmi_priv->has_hdmi_audio =
+						drm_detect_monitor_audio(edid);
+		}
+
+		psb_intel_output->base.display_info.raw_edid = NULL;
+		kfree(edid);
+	}
+	return status;
+}
+
+static int cdv_hdmi_set_property(struct drm_connector *connector,
+				       struct drm_property *property,
+				       uint64_t value)
+{
+	struct drm_encoder *encoder = connector->encoder;
+
+	if (!strcmp(property->name, "scaling mode") && encoder) {
+		struct psb_intel_crtc *crtc = to_psb_intel_crtc(encoder->crtc);
+		bool centre;
+		uint64_t curValue;
+
+		if (!crtc)
+			return -1;
+
+		switch (value) {
+		case DRM_MODE_SCALE_FULLSCREEN:
+			break;
+		case DRM_MODE_SCALE_NO_SCALE:
+			break;
+		case DRM_MODE_SCALE_ASPECT:
+			break;
+		default:
+			return -1;
+		}
+
+		if (drm_connector_property_get_value(connector,
+							property, &curValue))
+			return -1;
+
+		if (curValue == value)
+			return 0;
+
+		if (drm_connector_property_set_value(connector,
+							property, value))
+			return -1;
+
+		centre = (curValue == DRM_MODE_SCALE_NO_SCALE) ||
+			(value == DRM_MODE_SCALE_NO_SCALE);
+
+		if (crtc->saved_mode.hdisplay != 0 &&
+		    crtc->saved_mode.vdisplay != 0) {
+			if (centre) {
+				if (!drm_crtc_helper_set_mode(encoder->crtc, &crtc->saved_mode,
+					    encoder->crtc->x, encoder->crtc->y, encoder->crtc->fb))
+					return -1;
+			} else {
+				struct drm_encoder_helper_funcs *helpers
+						    = encoder->helper_private;
+				helpers->mode_set(encoder, &crtc->saved_mode,
+					     &crtc->saved_adjusted_mode);
+			}
+		}
+	}
+	return 0;
+}
+
+/*
+ * Return the list of HDMI DDC modes if available.
+ */
+static int cdv_hdmi_get_modes(struct drm_connector *connector)
+{
+	struct psb_intel_output *psb_intel_output =
+					to_psb_intel_output(connector);
+	struct edid *edid = NULL;
+	int ret = 0;
+
+	edid = drm_get_edid(&psb_intel_output->base,
+			 psb_intel_output->hdmi_i2c_adapter);
+	if (edid) {
+		drm_mode_connector_update_edid_property(&psb_intel_output->
+							base, edid);
+		ret = drm_add_edid_modes(&psb_intel_output->base, edid);
+		kfree(edid);
+	}
+	return ret;
+}
+
+static int cdv_hdmi_mode_valid(struct drm_connector *connector,
+				 struct drm_display_mode *mode)
+{
+
+	if (mode->clock > 165000)
+		return MODE_CLOCK_HIGH;
+	if (mode->clock < 20000)
+		return MODE_CLOCK_HIGH;
+
+	/* just in case */
+	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
+		return MODE_NO_DBLESCAN;
+
+	/* just in case */
+	if (mode->flags & DRM_MODE_FLAG_INTERLACE)
+		return MODE_NO_INTERLACE;
+
+	/*
+	 * FIXME: for now we limit the size to 1680x1050 on CDV, otherwise it
+	 * will go beyond the stolen memory size allocated to the framebuffer
+	 */
+	if (mode->hdisplay > 1680)
+		return MODE_PANEL;
+	if (mode->vdisplay > 1050)
+		return MODE_PANEL;
+	return MODE_OK;
+}
+
+static void cdv_hdmi_destroy(struct drm_connector *connector)
+{
+	struct psb_intel_output *psb_intel_output =
+					to_psb_intel_output(connector);
+
+	if (psb_intel_output->ddc_bus)
+		psb_intel_i2c_destroy(psb_intel_output->ddc_bus);
+	drm_sysfs_connector_remove(connector);
+	drm_connector_cleanup(connector);
+	kfree(connector);
+}
+
+static const struct drm_encoder_helper_funcs cdv_hdmi_helper_funcs = {
+	.dpms = cdv_hdmi_dpms,
+	.mode_fixup = cdv_hdmi_mode_fixup,
+	.prepare = psb_intel_encoder_prepare,
+	.mode_set = cdv_hdmi_mode_set,
+	.commit = psb_intel_encoder_commit,
+};
+
+static const struct drm_connector_helper_funcs
+					cdv_hdmi_connector_helper_funcs = {
+	.get_modes = cdv_hdmi_get_modes,
+	.mode_valid = cdv_hdmi_mode_valid,
+	.best_encoder = psb_intel_best_encoder,
+};
+
+static const struct drm_connector_funcs cdv_hdmi_connector_funcs = {
+	.dpms = drm_helper_connector_dpms,
+	.save = cdv_hdmi_save,
+	.restore = cdv_hdmi_restore,
+	.detect = cdv_hdmi_detect,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.set_property = cdv_hdmi_set_property,
+	.destroy = cdv_hdmi_destroy,
+};
+
+void cdv_hdmi_init(struct drm_device *dev,
+			struct psb_intel_mode_device *mode_dev, int reg)
+{
+	struct psb_intel_output *psb_intel_output;
+	struct drm_connector *connector;
+	struct drm_encoder *encoder;
+	struct mid_intel_hdmi_priv *hdmi_priv;
+	int ddc_bus;
+
+	psb_intel_output = kzalloc(sizeof(struct psb_intel_output) +
+			       sizeof(struct mid_intel_hdmi_priv), GFP_KERNEL);
+	if (!psb_intel_output)
+		return;
+
+	hdmi_priv = (struct mid_intel_hdmi_priv *)(psb_intel_output + 1);
+	psb_intel_output->mode_dev = mode_dev;
+	connector = &psb_intel_output->base;
+	encoder = &psb_intel_output->enc;
+	drm_connector_init(dev, &psb_intel_output->base,
+			   &cdv_hdmi_connector_funcs,
+			   DRM_MODE_CONNECTOR_DVID);
+
+	drm_encoder_init(dev, &psb_intel_output->enc, &psb_intel_lvds_enc_funcs,
+			 DRM_MODE_ENCODER_TMDS);
+
+	drm_mode_connector_attach_encoder(&psb_intel_output->base,
+					  &psb_intel_output->enc);
+	psb_intel_output->type = INTEL_OUTPUT_HDMI;
+	hdmi_priv->hdmi_reg = reg;
+	hdmi_priv->has_hdmi_sink = false;
+	psb_intel_output->dev_priv = hdmi_priv;
+
+	drm_encoder_helper_add(encoder, &cdv_hdmi_helper_funcs);
+	drm_connector_helper_add(connector,
+				 &cdv_hdmi_connector_helper_funcs);
+	connector->display_info.subpixel_order = SubPixelHorizontalRGB;
+	connector->interlace_allowed = false;
+	connector->doublescan_allowed = false;
+
+	drm_connector_attach_property(connector,
+	    dev->mode_config.scaling_mode_property, DRM_MODE_SCALE_FULLSCREEN);
+
+	switch (reg) {
+	case SDVOB:
+		ddc_bus = GPIOE;
+		break;
+	case SDVOC:
+		ddc_bus = GPIOD;
+		break;
+	default:
+		DRM_ERROR("unknown reg 0x%x for HDMI\n", reg);
+		goto failed_ddc;
+		break;
+	}
+
+	psb_intel_output->ddc_bus = psb_intel_i2c_create(dev,
+				ddc_bus, (reg == SDVOB) ? "HDMIB" : "HDMIC");
+
+	if (!psb_intel_output->ddc_bus) {
+		dev_err(dev->dev, "No ddc adapter available!\n");
+		goto failed_ddc;
+	}
+	psb_intel_output->hdmi_i2c_adapter =
+				&(psb_intel_output->ddc_bus->adapter);
+	hdmi_priv->dev = dev;
+	drm_sysfs_connector_add(connector);
+	return;
+
+failed_ddc:
+	drm_encoder_cleanup(&psb_intel_output->enc);
+	drm_connector_cleanup(&psb_intel_output->base);
+	kfree(psb_intel_output);
+}