1 files changed, 266 insertions, 0 deletions
diff --git a/drivers/gpu/drm/openchrome/via_tmds.c b/drivers/gpu/drm/openchrome/via_tmds.c
new file mode 100644
index 000000000000..7fbf9275e766
--- /dev/null
+++ b/drivers/gpu/drm/openchrome/via_tmds.c
@@ -0,0 +1,266 @@
+/*
+ * Copyright (C) 2016-2017 Kevin Brace
+ * Copyright © 2013 James Simmons
+ *
+ * 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:
+ *  Kevin Brace <kevinbrace@gmx.com>
+ *	James Simmons <jsimmons@infradead.org>
+ */
+
+#include "via_drv.h"
+
+static void
+viaTMDSPower(struct via_device *dev_priv,
+                bool powerState)
+{
+    DRM_DEBUG("Entered viaTMDSPower.\n");
+
+    if (powerState) {
+        /* Software control for LVDS1 power sequence. */
+        via_lvds1_set_power_seq(VGABASE, true);
+
+        via_lvds1_set_soft_display_period(VGABASE, true);
+        via_lvds1_set_soft_data(VGABASE, true);
+        via_tmds_set_power(VGABASE, true);
+    } else {
+        /* Software control for LVDS1 power sequence. */
+        via_lvds1_set_power_seq(VGABASE, true);
+
+        via_tmds_set_power(VGABASE, false);
+        via_lvds1_set_soft_data(VGABASE, false);
+        via_lvds1_set_soft_display_period(VGABASE, false);
+    }
+
+    DRM_INFO("Integrated TMDS (DVI) Power: %s\n",
+                powerState ? "On" : "Off");
+
+    DRM_DEBUG("Exiting viaTMDSPower.\n");
+}
+
+/*
+ * Set TMDS (DVI) sync polarity.
+ */
+static void
+via_tmds_sync_polarity(struct via_device *dev_priv, unsigned int flags)
+{
+	u8 syncPolarity = 0x00;
+
+	DRM_DEBUG_KMS("Entered via_tmds_sync_polarity.\n");
+
+	if (flags & DRM_MODE_FLAG_NHSYNC) {
+		syncPolarity |= BIT(0);
+	}
+
+	if (flags & DRM_MODE_FLAG_NVSYNC) {
+		syncPolarity |= BIT(1);
+	}
+
+	via_tmds_set_sync_polarity(VGABASE, syncPolarity);
+	DRM_INFO("TMDS (DVI) Horizontal Sync Polarity: %s\n",
+		(syncPolarity & BIT(0)) ? "-" : "+");
+	DRM_INFO("TMDS (DVI) Vertical Sync Polarity: %s\n",
+		(syncPolarity & BIT(1)) ? "-" : "+");
+
+	DRM_DEBUG_KMS("Exiting via_tmds_sync_polarity.\n");
+}
+
+/*
+ * Sets TMDS (DVI) display source.
+ */
+static void
+via_tmds_display_source(struct via_device *dev_priv, int index)
+{
+	u8 displaySource = index;
+
+	DRM_DEBUG_KMS("Entered via_tmds_display_source.\n");
+
+	via_tmds_set_display_source(VGABASE, displaySource & 0x01);
+	DRM_INFO("TMDS (DVI) Display Source: IGA%d\n",
+			(displaySource & 0x01) + 1);
+
+	DRM_DEBUG_KMS("Exiting via_tmds_display_source.\n");
+}
+
+/*
+ * Routines for controlling stuff on the TMDS port
+ */
+static const struct drm_encoder_funcs via_tmds_enc_funcs = {
+	.destroy = via_encoder_cleanup,
+};
+
+/* Manage the power state of the DAC */
+static void
+via_tmds_dpms(struct drm_encoder *encoder, int mode)
+{
+	struct via_device *dev_priv = encoder->dev->dev_private;
+
+    DRM_DEBUG("Entered via_tmds_dpms.\n");
+
+	switch (mode) {
+	case DRM_MODE_DPMS_SUSPEND:
+	case DRM_MODE_DPMS_STANDBY:
+	case DRM_MODE_DPMS_OFF:
+        viaTMDSPower(dev_priv, false);
+		break;
+	case DRM_MODE_DPMS_ON:
+        viaTMDSPower(dev_priv, true);
+		break;
+	default:
+        DRM_ERROR("Bad DPMS mode.");
+	    break;
+	}
+
+    DRM_DEBUG("Exiting via_tmds_dpms.\n");
+}
+
+/* Pass our mode to the connectors and the CRTC to give them a chance to
+ * adjust it according to limitations or connector properties, and also
+ * a chance to reject the mode entirely. Usefule for things like scaling.
+ */
+static bool
+via_tmds_mode_fixup(struct drm_encoder *encoder,
+		 const struct drm_display_mode *mode,
+		 struct drm_display_mode *adjusted_mode)
+{
+	drm_mode_set_crtcinfo(adjusted_mode, 0);
+	return true;
+}
+
+/*
+ * Handle CX700 / VX700 and VX800 integrated TMDS (DVI) mode setting.
+ */
+static void
+via_tmds_mode_set(struct drm_encoder *encoder,
+			struct drm_display_mode *mode,
+			struct drm_display_mode *adjusted_mode)
+{
+	struct via_device *dev_priv = encoder->dev->dev_private;
+	struct via_crtc *iga = container_of(encoder->crtc, struct via_crtc, base);
+
+	DRM_DEBUG_KMS("Entered via_tmds_mode_set.\n");
+
+	via_tmds_sync_polarity(dev_priv, adjusted_mode->flags);
+	via_tmds_display_source(dev_priv, iga->index);
+
+	DRM_DEBUG_KMS("Exiting via_tmds_mode_set.\n");
+}
+
+static const struct drm_encoder_helper_funcs via_tmds_enc_helper_funcs = {
+	.dpms = via_tmds_dpms,
+	.mode_fixup = via_tmds_mode_fixup,
+	.mode_set = via_tmds_mode_set,
+	.prepare = via_encoder_prepare,
+	.commit = via_encoder_commit,
+	.disable = via_encoder_disable,
+};
+
+static enum drm_connector_status
+via_dvi_detect(struct drm_connector *connector, bool force)
+{
+	struct via_connector *con = container_of(connector, struct via_connector, base);
+	enum drm_connector_status ret = connector_status_disconnected;
+	struct edid *edid = NULL;
+
+	drm_mode_connector_update_edid_property(connector, edid);
+	if (con->ddc_bus) {
+		edid = drm_get_edid(connector, con->ddc_bus);
+		if (edid) {
+			if ((connector->connector_type == DRM_MODE_CONNECTOR_DVIA) ^
+			    (edid->input & DRM_EDID_INPUT_DIGITAL)) {
+				drm_mode_connector_update_edid_property(connector, edid);
+				ret = connector_status_connected;
+			}
+			kfree(edid);
+		}
+	}
+	return ret;
+}
+
+static const struct drm_connector_funcs via_dvi_connector_funcs = {
+	.dpms = drm_helper_connector_dpms,
+	.detect = via_dvi_detect,
+	.fill_modes = drm_helper_probe_single_connector_modes,
+	.set_property = via_connector_set_property,
+	.destroy = via_connector_destroy,
+};
+
+static const struct drm_connector_helper_funcs via_dvi_connector_helper_funcs = {
+	.mode_valid = via_connector_mode_valid,
+	.get_modes = via_get_edid_modes,
+	.best_encoder = via_best_encoder,
+};
+
+int
+via_tmds_init(struct drm_device *dev)
+{
+	struct via_device *dev_priv = dev->dev_private;
+	struct via_connector *con;
+	struct via_encoder *enc;
+	int i2c_port = 0x31;
+
+	if (!(vga_rseq(VGABASE, 0x3E) & BIT(5))) {
+		DRM_INFO("Internal DVI not detected\n");
+		return 1;
+	}
+
+	enc = kzalloc(sizeof(*enc) + 2 * sizeof(*con), GFP_KERNEL);
+	if (!enc) {
+		DRM_ERROR("Failed to allocate connector and encoder\n");
+		return -ENOMEM;
+	}
+
+	/* Setup the encoders and attach them */
+	drm_encoder_init(dev, &enc->base, &via_tmds_enc_funcs, DRM_MODE_ENCODER_DAC);
+	drm_encoder_helper_add(&enc->base, &via_tmds_enc_helper_funcs);
+
+	enc->base.possible_crtcs = BIT(1) | BIT(0);
+	enc->base.possible_clones = 0;
+	enc->di_port = VIA_DI_PORT_DFPL;
+
+	/* Piece together our DVI-D connector */
+	con = &enc->cons[0];
+	drm_connector_init(dev, &con->base, &via_dvi_connector_funcs,
+				DRM_MODE_CONNECTOR_DVID);
+	drm_connector_helper_add(&con->base, &via_dvi_connector_helper_funcs);
+	drm_connector_register(&con->base);
+
+	con->ddc_bus = via_find_ddc_bus(i2c_port);
+	con->base.doublescan_allowed = false;
+	con->base.interlace_allowed = true;
+	INIT_LIST_HEAD(&con->props);
+
+	drm_mode_connector_attach_encoder(&con->base, &enc->base);
+
+	/* Now handle the DVI-A case */
+	con = &enc->cons[1];
+	drm_connector_init(dev, &con->base, &via_dvi_connector_funcs,
+				DRM_MODE_CONNECTOR_DVIA);
+	drm_connector_helper_add(&con->base, &via_dvi_connector_helper_funcs);
+	drm_connector_register(&con->base);
+	con->ddc_bus = via_find_ddc_bus(i2c_port);
+	con->base.doublescan_allowed = false;
+	con->base.interlace_allowed = true;
+	INIT_LIST_HEAD(&con->props);
+
+	drm_mode_connector_attach_encoder(&con->base, &enc->base);
+	return 0;
+}