// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2016 BayLibre, SAS
* Author: Neil Armstrong <[email protected]>
* Copyright (C) 2015 Amlogic, Inc. All rights reserved.
*/
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include <linux/reset.h>
#include <media/cec-notifier.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 <linux/media-bus-format.h>
#include <linux/videodev2.h>
#include "meson_drv.h"
#include "meson_registers.h"
#include "meson_vclk.h"
#include "meson_venc.h"
#include "meson_encoder_hdmi.h"
struct meson_encoder_hdmi {
struct drm_encoder encoder;
struct drm_bridge bridge;
struct drm_bridge *next_bridge;
struct drm_connector *connector;
struct meson_drm *priv;
unsigned long output_bus_fmt;
struct cec_notifier *cec_notifier;
};
#define bridge_to_meson_encoder_hdmi(x) \
container_of(x, struct meson_encoder_hdmi, bridge)
static int meson_encoder_hdmi_attach(struct drm_bridge *bridge,
enum drm_bridge_attach_flags flags)
{
struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
return drm_bridge_attach(bridge->encoder, encoder_hdmi->next_bridge,
&encoder_hdmi->bridge, flags);
}
static void meson_encoder_hdmi_detach(struct drm_bridge *bridge)
{
struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
cec_notifier_conn_unregister(encoder_hdmi->cec_notifier);
encoder_hdmi->cec_notifier = NULL;
}
static void meson_encoder_hdmi_set_vclk(struct meson_encoder_hdmi *encoder_hdmi,
const struct drm_display_mode *mode)
{
struct meson_drm *priv = encoder_hdmi->priv;
int vic = drm_match_cea_mode(mode);
unsigned int phy_freq;
unsigned int vclk_freq;
unsigned int venc_freq;
unsigned int hdmi_freq;
vclk_freq = mode->clock;
/* For 420, pixel clock is half unlike venc clock */
if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24)
vclk_freq /= 2;
/* TMDS clock is pixel_clock * 10 */
phy_freq = vclk_freq * 10;
if (!vic) {
meson_vclk_setup(priv, MESON_VCLK_TARGET_DMT, phy_freq,
vclk_freq, vclk_freq, vclk_freq, false);
return;
}
/* 480i/576i needs global pixel doubling */
if (mode->flags & DRM_MODE_FLAG_DBLCLK)
vclk_freq *= 2;
venc_freq = vclk_freq;
hdmi_freq = vclk_freq;
/* VENC double pixels for 1080i, 720p and YUV420 modes */
if (meson_venc_hdmi_venc_repeat(vic) ||
encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24)
venc_freq *= 2;
vclk_freq = max(venc_freq, hdmi_freq);
if (mode->flags & DRM_MODE_FLAG_DBLCLK)
venc_freq /= 2;
dev_dbg(priv->dev, "vclk:%d phy=%d venc=%d hdmi=%d enci=%d\n",
phy_freq, vclk_freq, venc_freq, hdmi_freq,
priv->venc.hdmi_use_enci);
meson_vclk_setup(priv, MESON_VCLK_TARGET_HDMI, phy_freq, vclk_freq,
venc_freq, hdmi_freq, priv->venc.hdmi_use_enci);
}
static enum drm_mode_status meson_encoder_hdmi_mode_valid(struct drm_bridge *bridge,
const struct drm_display_info *display_info,
const struct drm_display_mode *mode)
{
struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
struct meson_drm *priv = encoder_hdmi->priv;
bool is_hdmi2_sink = display_info->hdmi.scdc.supported;
unsigned int phy_freq;
unsigned int vclk_freq;
unsigned int venc_freq;
unsigned int hdmi_freq;
int vic = drm_match_cea_mode(mode);
enum drm_mode_status status;
dev_dbg(priv->dev, "Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
/* If sink does not support 540MHz, reject the non-420 HDMI2 modes */
if (display_info->max_tmds_clock &&
mode->clock > display_info->max_tmds_clock &&
!drm_mode_is_420_only(display_info, mode) &&
!drm_mode_is_420_also(display_info, mode))
return MODE_BAD;
/* Check against non-VIC supported modes */
if (!vic) {
status = meson_venc_hdmi_supported_mode(mode);
if (status != MODE_OK)
return status;
return meson_vclk_dmt_supported_freq(priv, mode->clock);
/* Check against supported VIC modes */
} else if (!meson_venc_hdmi_supported_vic(vic))
return MODE_BAD;
vclk_freq = mode->clock;
/* For 420, pixel clock is half unlike venc clock */
if (drm_mode_is_420_only(display_info, mode) ||
(!is_hdmi2_sink &&
drm_mode_is_420_also(display_info, mode)))
vclk_freq /= 2;
/* TMDS clock is pixel_clock * 10 */
phy_freq = vclk_freq * 10;
/* 480i/576i needs global pixel doubling */
if (mode->flags & DRM_MODE_FLAG_DBLCLK)
vclk_freq *= 2;
venc_freq = vclk_freq;
hdmi_freq = vclk_freq;
/* VENC double pixels for 1080i, 720p and YUV420 modes */
if (meson_venc_hdmi_venc_repeat(vic) ||
drm_mode_is_420_only(display_info, mode) ||
(!is_hdmi2_sink &&
drm_mode_is_420_also(display_info, mode)))
venc_freq *= 2;
vclk_freq = max(venc_freq, hdmi_freq);
if (mode->flags & DRM_MODE_FLAG_DBLCLK)
venc_freq /= 2;
dev_dbg(priv->dev, "%s: vclk:%d phy=%d venc=%d hdmi=%d\n",
__func__, phy_freq, vclk_freq, venc_freq, hdmi_freq);
return meson_vclk_vic_supported_freq(priv, phy_freq, vclk_freq);
}
static void meson_encoder_hdmi_atomic_enable(struct drm_bridge *bridge,
struct drm_bridge_state *bridge_state)
{
struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
struct drm_atomic_state *state = bridge_state->base.state;
unsigned int ycrcb_map = VPU_HDMI_OUTPUT_CBYCR;
struct meson_drm *priv = encoder_hdmi->priv;
struct drm_connector_state *conn_state;
const struct drm_display_mode *mode;
struct drm_crtc_state *crtc_state;
struct drm_connector *connector;
bool yuv420_mode = false;
int vic;
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;
mode = &crtc_state->adjusted_mode;
vic = drm_match_cea_mode(mode);
dev_dbg(priv->dev, "\"%s\" vic %d\n", mode->name, vic);
if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24) {
ycrcb_map = VPU_HDMI_OUTPUT_CRYCB;
yuv420_mode = true;
} else if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYVY8_1X16)
ycrcb_map = VPU_HDMI_OUTPUT_CRYCB;
/* VENC + VENC-DVI Mode setup */
meson_venc_hdmi_mode_set(priv, vic, ycrcb_map, yuv420_mode, mode);
/* VCLK Set clock */
meson_encoder_hdmi_set_vclk(encoder_hdmi, mode);
if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24)
/* Setup YUV420 to HDMI-TX, no 10bit diphering */
writel_relaxed(2 | (2 << 2),
priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
else if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYVY8_1X16)
/* Setup YUV422 to HDMI-TX, no 10bit diphering */
writel_relaxed(1 | (2 << 2),
priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
else
/* Setup YUV444 to HDMI-TX, no 10bit diphering */
writel_relaxed(0, priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
dev_dbg(priv->dev, "%s\n", priv->venc.hdmi_use_enci ? "VENCI" : "VENCP");
if (priv->venc.hdmi_use_enci)
writel_relaxed(1, priv->io_base + _REG(ENCI_VIDEO_EN));
else
writel_relaxed(1, priv->io_base + _REG(ENCP_VIDEO_EN));
}
static void meson_encoder_hdmi_atomic_disable(struct drm_bridge *bridge,
struct drm_bridge_state *bridge_state)
{
struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
struct meson_drm *priv = encoder_hdmi->priv;
writel_bits_relaxed(0x3, 0,
priv->io_base + _REG(VPU_HDMI_SETTING));
writel_relaxed(0, priv->io_base + _REG(ENCI_VIDEO_EN));
writel_relaxed(0, priv->io_base + _REG(ENCP_VIDEO_EN));
}
static const u32 meson_encoder_hdmi_out_bus_fmts[] = {
MEDIA_BUS_FMT_YUV8_1X24,
MEDIA_BUS_FMT_UYVY8_1X16,
MEDIA_BUS_FMT_UYYVYY8_0_5X24,
};
static u32 *
meson_encoder_hdmi_get_inp_bus_fmts(struct drm_bridge *bridge,
struct drm_bridge_state *bridge_state,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state,
u32 output_fmt,
unsigned int *num_input_fmts)
{
u32 *input_fmts = NULL;
int i;
*num_input_fmts = 0;
for (i = 0 ; i < ARRAY_SIZE(meson_encoder_hdmi_out_bus_fmts) ; ++i) {
if (output_fmt == meson_encoder_hdmi_out_bus_fmts[i]) {
*num_input_fmts = 1;
input_fmts = kcalloc(*num_input_fmts,
sizeof(*input_fmts),
GFP_KERNEL);
if (!input_fmts)
return NULL;
input_fmts[0] = output_fmt;
break;
}
}
return input_fmts;
}
static int meson_encoder_hdmi_atomic_check(struct drm_bridge *bridge,
struct drm_bridge_state *bridge_state,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
struct drm_connector_state *old_conn_state =
drm_atomic_get_old_connector_state(conn_state->state, conn_state->connector);
struct meson_drm *priv = encoder_hdmi->priv;
encoder_hdmi->output_bus_fmt = bridge_state->output_bus_cfg.format;
dev_dbg(priv->dev, "output_bus_fmt %lx\n", encoder_hdmi->output_bus_fmt);
if (!drm_connector_atomic_hdr_metadata_equal(old_conn_state, conn_state))
crtc_state->mode_changed = true;
return 0;
}
static void meson_encoder_hdmi_hpd_notify(struct drm_bridge *bridge,
enum drm_connector_status status)
{
struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
if (!encoder_hdmi->cec_notifier)
return;
if (status == connector_status_connected) {
const struct drm_edid *drm_edid;
const struct edid *edid;
drm_edid = drm_bridge_edid_read(encoder_hdmi->next_bridge,
encoder_hdmi->connector);
if (!drm_edid)
return;
/*
* FIXME: The CEC physical address should be set using
* cec_notifier_set_phys_addr(encoder_hdmi->cec_notifier,
* connector->display_info.source_physical_address) from a path
* that has read the EDID and called
* drm_edid_connector_update().
*/
edid = drm_edid_raw(drm_edid);
cec_notifier_set_phys_addr_from_edid(encoder_hdmi->cec_notifier, edid);
drm_edid_free(drm_edid);
} else
cec_notifier_phys_addr_invalidate(encoder_hdmi->cec_notifier);
}
static const struct drm_bridge_funcs meson_encoder_hdmi_bridge_funcs = {
.attach = meson_encoder_hdmi_attach,
.detach = meson_encoder_hdmi_detach,
.mode_valid = meson_encoder_hdmi_mode_valid,
.hpd_notify = meson_encoder_hdmi_hpd_notify,
.atomic_enable = meson_encoder_hdmi_atomic_enable,
.atomic_disable = meson_encoder_hdmi_atomic_disable,
.atomic_get_input_bus_fmts = meson_encoder_hdmi_get_inp_bus_fmts,
.atomic_check = meson_encoder_hdmi_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_hdmi_probe(struct meson_drm *priv)
{
struct meson_encoder_hdmi *meson_encoder_hdmi;
struct platform_device *pdev;
struct device_node *remote;
int ret;
meson_encoder_hdmi = devm_kzalloc(priv->dev, sizeof(*meson_encoder_hdmi), GFP_KERNEL);
if (!meson_encoder_hdmi)
return -ENOMEM;
/* HDMI Transceiver Bridge */
remote = of_graph_get_remote_node(priv->dev->of_node, 1, 0);
if (!remote) {
dev_err(priv->dev, "HDMI transceiver device is disabled");
return 0;
}
meson_encoder_hdmi->next_bridge = of_drm_find_bridge(remote);
if (!meson_encoder_hdmi->next_bridge) {
ret = dev_err_probe(priv->dev, -EPROBE_DEFER,
"Failed to find HDMI transceiver bridge\n");
goto err_put_node;
}
/* HDMI Encoder Bridge */
meson_encoder_hdmi->bridge.funcs = &meson_encoder_hdmi_bridge_funcs;
meson_encoder_hdmi->bridge.of_node = priv->dev->of_node;
meson_encoder_hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
meson_encoder_hdmi->bridge.interlace_allowed = true;
drm_bridge_add(&meson_encoder_hdmi->bridge);
meson_encoder_hdmi->priv = priv;
/* Encoder */
ret = drm_simple_encoder_init(priv->drm, &meson_encoder_hdmi->encoder,
DRM_MODE_ENCODER_TMDS);
if (ret) {
dev_err_probe(priv->dev, ret, "Failed to init HDMI encoder\n");
goto err_put_node;
}
meson_encoder_hdmi->encoder.possible_crtcs = BIT(0);
/* Attach HDMI Encoder Bridge to Encoder */
ret = drm_bridge_attach(&meson_encoder_hdmi->encoder, &meson_encoder_hdmi->bridge, NULL,
DRM_BRIDGE_ATTACH_NO_CONNECTOR);
if (ret) {
dev_err_probe(priv->dev, ret, "Failed to attach bridge\n");
goto err_put_node;
}
/* Initialize & attach Bridge Connector */
meson_encoder_hdmi->connector = drm_bridge_connector_init(priv->drm,
&meson_encoder_hdmi->encoder);
if (IS_ERR(meson_encoder_hdmi->connector)) {
ret = dev_err_probe(priv->dev,
PTR_ERR(meson_encoder_hdmi->connector),
"Unable to create HDMI bridge connector\n");
goto err_put_node;
}
drm_connector_attach_encoder(meson_encoder_hdmi->connector,
&meson_encoder_hdmi->encoder);
/*
* We should have now in place:
* encoder->[hdmi encoder bridge]->[dw-hdmi bridge]->[display connector bridge]->[display connector]
*/
/*
* drm_connector_attach_max_bpc_property() requires the
* connector to have a state.
*/
drm_atomic_helper_connector_reset(meson_encoder_hdmi->connector);
if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXL) ||
meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXM) ||
meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A))
drm_connector_attach_hdr_output_metadata_property(meson_encoder_hdmi->connector);
drm_connector_attach_max_bpc_property(meson_encoder_hdmi->connector, 8, 8);
/* Handle this here until handled by drm_bridge_connector_init() */
meson_encoder_hdmi->connector->ycbcr_420_allowed = true;
pdev = of_find_device_by_node(remote);
of_node_put(remote);
if (pdev) {
struct cec_connector_info conn_info;
struct cec_notifier *notifier;
cec_fill_conn_info_from_drm(&conn_info, meson_encoder_hdmi->connector);
notifier = cec_notifier_conn_register(&pdev->dev, NULL, &conn_info);
if (!notifier) {
put_device(&pdev->dev);
return -ENOMEM;
}
meson_encoder_hdmi->cec_notifier = notifier;
}
priv->encoders[MESON_ENC_HDMI] = meson_encoder_hdmi;
dev_dbg(priv->dev, "HDMI encoder initialized\n");
return 0;
err_put_node:
of_node_put(remote);
return ret;
}
void meson_encoder_hdmi_remove(struct meson_drm *priv)
{
struct meson_encoder_hdmi *meson_encoder_hdmi;
if (priv->encoders[MESON_ENC_HDMI]) {
meson_encoder_hdmi = priv->encoders[MESON_ENC_HDMI];
drm_bridge_remove(&meson_encoder_hdmi->bridge);
}
}
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