1 files changed, 293 insertions, 0 deletions
diff --git a/drivers/gpu/drm/meson/meson_venc_cvbs.c b/drivers/gpu/drm/meson/meson_venc_cvbs.c
new file mode 100644
index 000000000000..c809c085fd78
--- /dev/null
+++ b/drivers/gpu/drm/meson/meson_venc_cvbs.c
@@ -0,0 +1,293 @@
+/*
+ * Copyright (C) 2016 BayLibre, SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ * Copyright (C) 2015 Amlogic, Inc. All rights reserved.
+ * Copyright (C) 2014 Endless Mobile
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ * Written by:
+ *     Jasper St. Pierre <jstpierre@mecheye.net>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_graph.h>
+
+#include <drm/drmP.h>
+#include <drm/drm_edid.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_atomic_helper.h>
+
+#include "meson_venc_cvbs.h"
+#include "meson_venc.h"
+#include "meson_registers.h"
+
+/* HHI VDAC Registers */
+#define HHI_VDAC_CNTL0		0x2F4 /* 0xbd offset in data sheet */
+#define HHI_VDAC_CNTL1		0x2F8 /* 0xbe offset in data sheet */
+
+struct meson_venc_cvbs {
+	struct drm_encoder	encoder;
+	struct drm_connector	connector;
+	struct meson_drm	*priv;
+};
+#define encoder_to_meson_venc_cvbs(x) \
+	container_of(x, struct meson_venc_cvbs, encoder)
+
+#define connector_to_meson_venc_cvbs(x) \
+	container_of(x, struct meson_venc_cvbs, connector)
+
+/* Supported Modes */
+
+struct meson_cvbs_mode meson_cvbs_modes[MESON_CVBS_MODES_COUNT] = {
+	{ /* PAL */
+		.enci = &meson_cvbs_enci_pal,
+		.mode = {
+			DRM_MODE("720x576i", DRM_MODE_TYPE_DRIVER, 13500,
+				 720, 732, 795, 864, 0, 576, 580, 586, 625, 0,
+				 DRM_MODE_FLAG_INTERLACE),
+			.vrefresh = 50,
+			.picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3,
+		},
+	},
+	{ /* NTSC */
+		.enci = &meson_cvbs_enci_ntsc,
+		.mode = {
+			DRM_MODE("720x480i", DRM_MODE_TYPE_DRIVER, 13500,
+				720, 739, 801, 858, 0, 480, 488, 494, 525, 0,
+				DRM_MODE_FLAG_INTERLACE),
+			.vrefresh = 60,
+			.picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3,
+		},
+	},
+};
+
+/* Connector */
+
+static void meson_cvbs_connector_destroy(struct drm_connector *connector)
+{
+	drm_connector_cleanup(connector);
+}
+
+static enum drm_connector_status
+meson_cvbs_connector_detect(struct drm_connector *connector, bool force)
+{
+	/* FIXME: Add load-detect or jack-detect if possible */
+	return connector_status_connected;
+}
+
+static int meson_cvbs_connector_get_modes(struct drm_connector *connector)
+{
+	struct drm_device *dev = connector->dev;
+	struct drm_display_mode *mode;
+	int i;
+
+	for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
+		struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];
+
+		mode = drm_mode_duplicate(dev, &meson_mode->mode);
+		if (!mode) {
+			DRM_ERROR("Failed to create a new display mode\n");
+			return 0;
+		}
+
+		drm_mode_probed_add(connector, mode);
+	}
+
+	return i;
+}
+
+static int meson_cvbs_connector_mode_valid(struct drm_connector *connector,
+					   struct drm_display_mode *mode)
+{
+	/* Validate the modes added in get_modes */
+	return MODE_OK;
+}
+
+static const struct drm_connector_funcs meson_cvbs_connector_funcs = {
+	.dpms			= drm_atomic_helper_connector_dpms,
+	.detect			= meson_cvbs_connector_detect,
+	.fill_modes		= drm_helper_probe_single_connector_modes,
+	.destroy		= meson_cvbs_connector_destroy,
+	.reset			= drm_atomic_helper_connector_reset,
+	.atomic_duplicate_state	= drm_atomic_helper_connector_duplicate_state,
+	.atomic_destroy_state	= drm_atomic_helper_connector_destroy_state,
+};
+
+static const
+struct drm_connector_helper_funcs meson_cvbs_connector_helper_funcs = {
+	.get_modes	= meson_cvbs_connector_get_modes,
+	.mode_valid	= meson_cvbs_connector_mode_valid,
+};
+
+/* Encoder */
+
+static void meson_venc_cvbs_encoder_destroy(struct drm_encoder *encoder)
+{
+	drm_encoder_cleanup(encoder);
+}
+
+static const struct drm_encoder_funcs meson_venc_cvbs_encoder_funcs = {
+	.destroy        = meson_venc_cvbs_encoder_destroy,
+};
+
+static int meson_venc_cvbs_encoder_atomic_check(struct drm_encoder *encoder,
+					struct drm_crtc_state *crtc_state,
+					struct drm_connector_state *conn_state)
+{
+	int i;
+
+	for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
+		struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];
+
+		if (drm_mode_equal(&crtc_state->mode, &meson_mode->mode))
+			return 0;
+	}
+
+	return -EINVAL;
+}
+
+static void meson_venc_cvbs_encoder_disable(struct drm_encoder *encoder)
+{
+	struct meson_venc_cvbs *meson_venc_cvbs =
+					encoder_to_meson_venc_cvbs(encoder);
+	struct meson_drm *priv = meson_venc_cvbs->priv;
+
+	/* Disable CVBS VDAC */
+	regmap_write(priv->hhi, HHI_VDAC_CNTL0, 0);
+	regmap_write(priv->hhi, HHI_VDAC_CNTL1, 0);
+}
+
+static void meson_venc_cvbs_encoder_enable(struct drm_encoder *encoder)
+{
+	struct meson_venc_cvbs *meson_venc_cvbs =
+					encoder_to_meson_venc_cvbs(encoder);
+	struct meson_drm *priv = meson_venc_cvbs->priv;
+
+	/* VDAC0 source is not from ATV */
+	writel_bits_relaxed(BIT(5), 0, priv->io_base + _REG(VENC_VDAC_DACSEL0));
+
+	if (meson_vpu_is_compatible(priv, "amlogic,meson-gxbb-vpu"))
+		regmap_write(priv->hhi, HHI_VDAC_CNTL0, 1);
+	else if (meson_vpu_is_compatible(priv, "amlogic,meson-gxm-vpu") ||
+		 meson_vpu_is_compatible(priv, "amlogic,meson-gxl-vpu"))
+		regmap_write(priv->hhi, HHI_VDAC_CNTL0, 0xf0001);
+
+	regmap_write(priv->hhi, HHI_VDAC_CNTL1, 0);
+}
+
+static void meson_venc_cvbs_encoder_mode_set(struct drm_encoder *encoder,
+				   struct drm_display_mode *mode,
+				   struct drm_display_mode *adjusted_mode)
+{
+	struct meson_venc_cvbs *meson_venc_cvbs =
+					encoder_to_meson_venc_cvbs(encoder);
+	int i;
+
+	for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
+		struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];
+
+		if (drm_mode_equal(mode, &meson_mode->mode)) {
+			meson_venci_cvbs_mode_set(meson_venc_cvbs->priv,
+						  meson_mode->enci);
+			break;
+		}
+	}
+}
+
+static const struct drm_encoder_helper_funcs
+				meson_venc_cvbs_encoder_helper_funcs = {
+	.atomic_check	= meson_venc_cvbs_encoder_atomic_check,
+	.disable	= meson_venc_cvbs_encoder_disable,
+	.enable		= meson_venc_cvbs_encoder_enable,
+	.mode_set	= meson_venc_cvbs_encoder_mode_set,
+};
+
+static bool meson_venc_cvbs_connector_is_available(struct meson_drm *priv)
+{
+	struct device_node *ep, *remote;
+
+	/* CVBS VDAC output is on the first port, first endpoint */
+	ep = of_graph_get_endpoint_by_regs(priv->dev->of_node, 0, 0);
+	if (!ep)
+		return false;
+
+
+	/* If the endpoint node exists, consider it enabled */
+	remote = of_graph_get_remote_port(ep);
+	if (remote) {
+		of_node_put(ep);
+		return true;
+	}
+
+	of_node_put(ep);
+	of_node_put(remote);
+
+	return false;
+}
+
+int meson_venc_cvbs_create(struct meson_drm *priv)
+{
+	struct drm_device *drm = priv->drm;
+	struct meson_venc_cvbs *meson_venc_cvbs;
+	struct drm_connector *connector;
+	struct drm_encoder *encoder;
+	int ret;
+
+	if (!meson_venc_cvbs_connector_is_available(priv)) {
+		dev_info(drm->dev, "CVBS Output connector not available\n");
+		return -ENODEV;
+	}
+
+	meson_venc_cvbs = devm_kzalloc(priv->dev, sizeof(*meson_venc_cvbs),
+				       GFP_KERNEL);
+	if (!meson_venc_cvbs)
+		return -ENOMEM;
+
+	meson_venc_cvbs->priv = priv;
+	encoder = &meson_venc_cvbs->encoder;
+	connector = &meson_venc_cvbs->connector;
+
+	/* Connector */
+
+	drm_connector_helper_add(connector,
+				 &meson_cvbs_connector_helper_funcs);
+
+	ret = drm_connector_init(drm, connector, &meson_cvbs_connector_funcs,
+				 DRM_MODE_CONNECTOR_Composite);
+	if (ret) {
+		dev_err(priv->dev, "Failed to init CVBS connector\n");
+		return ret;
+	}
+
+	connector->interlace_allowed = 1;
+
+	/* Encoder */
+
+	drm_encoder_helper_add(encoder, &meson_venc_cvbs_encoder_helper_funcs);
+
+	ret = drm_encoder_init(drm, encoder, &meson_venc_cvbs_encoder_funcs,
+			       DRM_MODE_ENCODER_TVDAC, "meson_venc_cvbs");
+	if (ret) {
+		dev_err(priv->dev, "Failed to init CVBS encoder\n");
+		return ret;
+	}
+
+	encoder->possible_crtcs = BIT(0);
+
+	drm_mode_connector_attach_encoder(connector, encoder);
+
+	return 0;
+}