/*
* 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_atomic_helper.h>
#include <drm/drm_edid.h>
#include <drm/drm_probe_helper.h>
#include "meson_venc_cvbs.h"
#include "meson_venc.h"
#include "meson_vclk.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 = {
.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, 8);
}
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);
struct meson_drm *priv = meson_venc_cvbs->priv;
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(priv,
meson_mode->enci);
/* Setup 27MHz vclk2 for ENCI and VDAC */
meson_vclk_setup(priv, MESON_VCLK_TARGET_CVBS,
MESON_VCLK_CVBS, MESON_VCLK_CVBS,
MESON_VCLK_CVBS, true);
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 *remote;
remote = of_graph_get_remote_node(priv->dev->of_node, 0, 0);
if (!remote)
return false;
of_node_put(remote);
return true;
}
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 0;
}
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_connector_attach_encoder(connector, encoder);
return 0;
}
