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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2016 BayLibre, SAS
* Author: Neil Armstrong <narmstrong@baylibre.com>
* Copyright (C) 2015 Amlogic, Inc. All rights reserved.
* Copyright (C) 2014 Endless Mobile
*
* Written by:
* Jasper St. Pierre <jstpierre@mecheye.net>
*/
#include <linux/export.h>
#include <linux/of_graph.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_bridge_connector.h>
#include <drm/drm_device.h>
#include <drm/drm_edid.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>
#include "meson_registers.h"
#include "meson_vclk.h"
#include "meson_encoder_cvbs.h"
/* HHI VDAC Registers */
#define HHI_VDAC_CNTL0 0x2F4 /* 0xbd offset in data sheet */
#define HHI_VDAC_CNTL0_G12A 0x2EC /* 0xbd offset in data sheet */
#define HHI_VDAC_CNTL1 0x2F8 /* 0xbe offset in data sheet */
#define HHI_VDAC_CNTL1_G12A 0x2F0 /* 0xbe offset in data sheet */
struct meson_encoder_cvbs {
struct drm_encoder encoder;
struct drm_bridge bridge;
struct drm_bridge *next_bridge;
struct meson_drm *priv;
};
#define bridge_to_meson_encoder_cvbs(x) \
container_of(x, struct meson_encoder_cvbs, bridge)
/* 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),
.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),
.picture_aspect_ratio = HDMI_PICTURE_ASPECT_4_3,
},
},
};
static const struct meson_cvbs_mode *
meson_cvbs_get_mode(const struct drm_display_mode *req_mode)
{
int i;
for (i = 0; i < MESON_CVBS_MODES_COUNT; ++i) {
struct meson_cvbs_mode *meson_mode = &meson_cvbs_modes[i];
if (drm_mode_match(req_mode, &meson_mode->mode,
DRM_MODE_MATCH_TIMINGS |
DRM_MODE_MATCH_CLOCK |
DRM_MODE_MATCH_FLAGS |
DRM_MODE_MATCH_3D_FLAGS))
return meson_mode;
}
return NULL;
}
static int meson_encoder_cvbs_attach(struct drm_bridge *bridge,
enum drm_bridge_attach_flags flags)
{
struct meson_encoder_cvbs *meson_encoder_cvbs =
bridge_to_meson_encoder_cvbs(bridge);
return drm_bridge_attach(bridge->encoder, meson_encoder_cvbs->next_bridge,
&meson_encoder_cvbs->bridge, flags);
}
static int meson_encoder_cvbs_get_modes(struct drm_bridge *bridge,
struct drm_connector *connector)
{
struct meson_encoder_cvbs *meson_encoder_cvbs =
bridge_to_meson_encoder_cvbs(bridge);
struct meson_drm *priv = meson_encoder_cvbs->priv;
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(priv->drm, &meson_mode->mode);
if (!mode) {
dev_err(priv->dev, "Failed to create a new display mode\n");
return 0;
}
drm_mode_probed_add(connector, mode);
}
return i;
}
static int meson_encoder_cvbs_mode_valid(struct drm_bridge *bridge,
const struct drm_display_info *display_info,
const struct drm_display_mode *mode)
{
if (meson_cvbs_get_mode(mode))
return MODE_OK;
return MODE_BAD;
}
static int meson_encoder_cvbs_atomic_check(struct drm_bridge *bridge,
struct drm_bridge_state *bridge_state,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
if (meson_cvbs_get_mode(&crtc_state->mode))
return 0;
return -EINVAL;
}
static void meson_encoder_cvbs_atomic_enable(struct drm_bridge *bridge,
struct drm_bridge_state *bridge_state)
{
struct meson_encoder_cvbs *encoder_cvbs = bridge_to_meson_encoder_cvbs(bridge);
struct drm_atomic_state *state = bridge_state->base.state;
struct meson_drm *priv = encoder_cvbs->priv;
const struct meson_cvbs_mode *meson_mode;
struct drm_connector_state *conn_state;
struct drm_crtc_state *crtc_state;
struct drm_connector *connector;
connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder);
if (WARN_ON(!connector))
return;
conn_state = drm_atomic_get_new_connector_state(state, connector);
if (WARN_ON(!conn_state))
return;
crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
if (WARN_ON(!crtc_state))
return;
meson_mode = meson_cvbs_get_mode(&crtc_state->adjusted_mode);
if (WARN_ON(!meson_mode))
return;
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, MESON_VCLK_CVBS,
true);
/* VDAC0 source is not from ATV */
writel_bits_relaxed(VENC_VDAC_SEL_ATV_DMD, 0,
priv->io_base + _REG(VENC_VDAC_DACSEL0));
if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXBB)) {
regmap_write(priv->hhi, HHI_VDAC_CNTL0, 1);
regmap_write(priv->hhi, HHI_VDAC_CNTL1, 0);
} else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXM) ||
meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXL)) {
regmap_write(priv->hhi, HHI_VDAC_CNTL0, 0xf0001);
regmap_write(priv->hhi, HHI_VDAC_CNTL1, 0);
} else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) {
regmap_write(priv->hhi, HHI_VDAC_CNTL0_G12A, 0x906001);
regmap_write(priv->hhi, HHI_VDAC_CNTL1_G12A, 0);
}
}
static void meson_encoder_cvbs_atomic_disable(struct drm_bridge *bridge,
struct drm_bridge_state *bridge_state)
{
struct meson_encoder_cvbs *meson_encoder_cvbs =
bridge_to_meson_encoder_cvbs(bridge);
struct meson_drm *priv = meson_encoder_cvbs->priv;
/* Disable CVBS VDAC */
if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) {
regmap_write(priv->hhi, HHI_VDAC_CNTL0_G12A, 0);
regmap_write(priv->hhi, HHI_VDAC_CNTL1_G12A, 0);
} else {
regmap_write(priv->hhi, HHI_VDAC_CNTL0, 0);
regmap_write(priv->hhi, HHI_VDAC_CNTL1, 8);
}
}
static const struct drm_bridge_funcs meson_encoder_cvbs_bridge_funcs = {
.attach = meson_encoder_cvbs_attach,
.mode_valid = meson_encoder_cvbs_mode_valid,
.get_modes = meson_encoder_cvbs_get_modes,
.atomic_enable = meson_encoder_cvbs_atomic_enable,
.atomic_disable = meson_encoder_cvbs_atomic_disable,
.atomic_check = meson_encoder_cvbs_atomic_check,
.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
.atomic_reset = drm_atomic_helper_bridge_reset,
};
int meson_encoder_cvbs_init(struct meson_drm *priv)
{
struct drm_device *drm = priv->drm;
struct meson_encoder_cvbs *meson_encoder_cvbs;
struct drm_connector *connector;
struct device_node *remote;
int ret;
meson_encoder_cvbs = devm_kzalloc(priv->dev, sizeof(*meson_encoder_cvbs), GFP_KERNEL);
if (!meson_encoder_cvbs)
return -ENOMEM;
/* CVBS Connector Bridge */
remote = of_graph_get_remote_node(priv->dev->of_node, 0, 0);
if (!remote) {
dev_info(drm->dev, "CVBS Output connector not available\n");
return 0;
}
meson_encoder_cvbs->next_bridge = of_drm_find_bridge(remote);
if (!meson_encoder_cvbs->next_bridge) {
dev_err(priv->dev, "Failed to find CVBS Connector bridge\n");
return -EPROBE_DEFER;
}
/* CVBS Encoder Bridge */
meson_encoder_cvbs->bridge.funcs = &meson_encoder_cvbs_bridge_funcs;
meson_encoder_cvbs->bridge.of_node = priv->dev->of_node;
meson_encoder_cvbs->bridge.type = DRM_MODE_CONNECTOR_Composite;
meson_encoder_cvbs->bridge.ops = DRM_BRIDGE_OP_MODES;
meson_encoder_cvbs->bridge.interlace_allowed = true;
drm_bridge_add(&meson_encoder_cvbs->bridge);
meson_encoder_cvbs->priv = priv;
/* Encoder */
ret = drm_simple_encoder_init(priv->drm, &meson_encoder_cvbs->encoder,
DRM_MODE_ENCODER_TVDAC);
if (ret) {
dev_err(priv->dev, "Failed to init CVBS encoder: %d\n", ret);
return ret;
}
meson_encoder_cvbs->encoder.possible_crtcs = BIT(0);
/* Attach CVBS Encoder Bridge to Encoder */
ret = drm_bridge_attach(&meson_encoder_cvbs->encoder, &meson_encoder_cvbs->bridge, NULL,
DRM_BRIDGE_ATTACH_NO_CONNECTOR);
if (ret) {
dev_err(priv->dev, "Failed to attach bridge: %d\n", ret);
return ret;
}
/* Initialize & attach Bridge Connector */
connector = drm_bridge_connector_init(priv->drm, &meson_encoder_cvbs->encoder);
if (IS_ERR(connector)) {
dev_err(priv->dev, "Unable to create CVBS bridge connector\n");
return PTR_ERR(connector);
}
drm_connector_attach_encoder(connector, &meson_encoder_cvbs->encoder);
return 0;
}
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