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path: root/drivers/gpu/drm/meson/meson_venc_cvbs.c
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Diffstat (limited to 'drivers/gpu/drm/meson/meson_venc_cvbs.c')
-rw-r--r--drivers/gpu/drm/meson/meson_venc_cvbs.c293
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;
+}