1260 lines
29 KiB
C
1260 lines
29 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
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* Author: Chris Zhong <zyw@rock-chips.com>
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*/
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#include <linux/clk.h>
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#include <linux/component.h>
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#include <linux/extcon.h>
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#include <linux/firmware.h>
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#include <linux/mfd/syscon.h>
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#include <linux/phy/phy.h>
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#include <linux/regmap.h>
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#include <linux/reset.h>
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#include <sound/hdmi-codec.h>
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#include <drm/display/drm_dp_helper.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_edid.h>
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#include <drm/drm_of.h>
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#include <drm/drm_probe_helper.h>
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#include <drm/drm_simple_kms_helper.h>
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#include "cdn-dp-core.h"
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#include "cdn-dp-reg.h"
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#include "rockchip_drm_vop.h"
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static inline struct cdn_dp_device *connector_to_dp(struct drm_connector *connector)
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{
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return container_of(connector, struct cdn_dp_device, connector);
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}
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static inline struct cdn_dp_device *encoder_to_dp(struct drm_encoder *encoder)
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{
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struct rockchip_encoder *rkencoder = to_rockchip_encoder(encoder);
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return container_of(rkencoder, struct cdn_dp_device, encoder);
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}
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#define GRF_SOC_CON9 0x6224
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#define DP_SEL_VOP_LIT BIT(12)
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#define GRF_SOC_CON26 0x6268
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#define DPTX_HPD_SEL (3 << 12)
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#define DPTX_HPD_DEL (2 << 12)
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#define DPTX_HPD_SEL_MASK (3 << 28)
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#define CDN_FW_TIMEOUT_MS (64 * 1000)
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#define CDN_DPCD_TIMEOUT_MS 5000
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#define CDN_DP_FIRMWARE "rockchip/dptx.bin"
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MODULE_FIRMWARE(CDN_DP_FIRMWARE);
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struct cdn_dp_data {
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u8 max_phy;
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};
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static struct cdn_dp_data rk3399_cdn_dp = {
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.max_phy = 2,
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};
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static const struct of_device_id cdn_dp_dt_ids[] = {
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{ .compatible = "rockchip,rk3399-cdn-dp",
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.data = (void *)&rk3399_cdn_dp },
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{}
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};
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MODULE_DEVICE_TABLE(of, cdn_dp_dt_ids);
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static int cdn_dp_grf_write(struct cdn_dp_device *dp,
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unsigned int reg, unsigned int val)
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{
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int ret;
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ret = clk_prepare_enable(dp->grf_clk);
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if (ret) {
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DRM_DEV_ERROR(dp->dev, "Failed to prepare_enable grf clock\n");
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return ret;
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}
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ret = regmap_write(dp->grf, reg, val);
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if (ret) {
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DRM_DEV_ERROR(dp->dev, "Could not write to GRF: %d\n", ret);
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clk_disable_unprepare(dp->grf_clk);
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return ret;
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}
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clk_disable_unprepare(dp->grf_clk);
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return 0;
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}
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static int cdn_dp_clk_enable(struct cdn_dp_device *dp)
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{
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int ret;
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unsigned long rate;
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ret = clk_prepare_enable(dp->pclk);
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if (ret < 0) {
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DRM_DEV_ERROR(dp->dev, "cannot enable dp pclk %d\n", ret);
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goto err_pclk;
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}
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ret = clk_prepare_enable(dp->core_clk);
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if (ret < 0) {
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DRM_DEV_ERROR(dp->dev, "cannot enable core_clk %d\n", ret);
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goto err_core_clk;
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}
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ret = pm_runtime_get_sync(dp->dev);
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if (ret < 0) {
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DRM_DEV_ERROR(dp->dev, "cannot get pm runtime %d\n", ret);
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goto err_pm_runtime_get;
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}
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reset_control_assert(dp->core_rst);
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reset_control_assert(dp->dptx_rst);
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reset_control_assert(dp->apb_rst);
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reset_control_deassert(dp->core_rst);
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reset_control_deassert(dp->dptx_rst);
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reset_control_deassert(dp->apb_rst);
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rate = clk_get_rate(dp->core_clk);
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if (!rate) {
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DRM_DEV_ERROR(dp->dev, "get clk rate failed\n");
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ret = -EINVAL;
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goto err_set_rate;
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}
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cdn_dp_set_fw_clk(dp, rate);
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cdn_dp_clock_reset(dp);
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return 0;
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err_set_rate:
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pm_runtime_put(dp->dev);
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err_pm_runtime_get:
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clk_disable_unprepare(dp->core_clk);
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err_core_clk:
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clk_disable_unprepare(dp->pclk);
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err_pclk:
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return ret;
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}
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static void cdn_dp_clk_disable(struct cdn_dp_device *dp)
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{
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pm_runtime_put_sync(dp->dev);
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clk_disable_unprepare(dp->pclk);
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clk_disable_unprepare(dp->core_clk);
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}
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static int cdn_dp_get_port_lanes(struct cdn_dp_port *port)
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{
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struct extcon_dev *edev = port->extcon;
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union extcon_property_value property;
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int dptx;
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u8 lanes;
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dptx = extcon_get_state(edev, EXTCON_DISP_DP);
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if (dptx > 0) {
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extcon_get_property(edev, EXTCON_DISP_DP,
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EXTCON_PROP_USB_SS, &property);
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if (property.intval)
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lanes = 2;
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else
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lanes = 4;
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} else {
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lanes = 0;
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}
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return lanes;
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}
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static int cdn_dp_get_sink_count(struct cdn_dp_device *dp, u8 *sink_count)
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{
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int ret;
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u8 value;
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*sink_count = 0;
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ret = cdn_dp_dpcd_read(dp, DP_SINK_COUNT, &value, 1);
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if (ret)
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return ret;
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*sink_count = DP_GET_SINK_COUNT(value);
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return 0;
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}
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static struct cdn_dp_port *cdn_dp_connected_port(struct cdn_dp_device *dp)
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{
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struct cdn_dp_port *port;
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int i, lanes;
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for (i = 0; i < dp->ports; i++) {
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port = dp->port[i];
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lanes = cdn_dp_get_port_lanes(port);
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if (lanes)
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return port;
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}
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return NULL;
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}
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static bool cdn_dp_check_sink_connection(struct cdn_dp_device *dp)
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{
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unsigned long timeout = jiffies + msecs_to_jiffies(CDN_DPCD_TIMEOUT_MS);
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struct cdn_dp_port *port;
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u8 sink_count = 0;
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if (dp->active_port < 0 || dp->active_port >= dp->ports) {
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DRM_DEV_ERROR(dp->dev, "active_port is wrong!\n");
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return false;
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}
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port = dp->port[dp->active_port];
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/*
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* Attempt to read sink count, retry in case the sink may not be ready.
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*
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* Sinks are *supposed* to come up within 1ms from an off state, but
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* some docks need more time to power up.
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*/
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while (time_before(jiffies, timeout)) {
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if (!extcon_get_state(port->extcon, EXTCON_DISP_DP))
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return false;
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if (!cdn_dp_get_sink_count(dp, &sink_count))
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return sink_count ? true : false;
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usleep_range(5000, 10000);
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}
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DRM_DEV_ERROR(dp->dev, "Get sink capability timed out\n");
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return false;
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}
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static enum drm_connector_status
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cdn_dp_connector_detect(struct drm_connector *connector, bool force)
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{
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struct cdn_dp_device *dp = connector_to_dp(connector);
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enum drm_connector_status status = connector_status_disconnected;
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mutex_lock(&dp->lock);
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if (dp->connected)
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status = connector_status_connected;
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mutex_unlock(&dp->lock);
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return status;
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}
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static void cdn_dp_connector_destroy(struct drm_connector *connector)
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{
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drm_connector_unregister(connector);
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drm_connector_cleanup(connector);
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}
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static const struct drm_connector_funcs cdn_dp_atomic_connector_funcs = {
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.detect = cdn_dp_connector_detect,
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.destroy = cdn_dp_connector_destroy,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.reset = drm_atomic_helper_connector_reset,
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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};
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static int cdn_dp_connector_get_modes(struct drm_connector *connector)
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{
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struct cdn_dp_device *dp = connector_to_dp(connector);
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struct edid *edid;
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int ret = 0;
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mutex_lock(&dp->lock);
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edid = dp->edid;
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if (edid) {
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DRM_DEV_DEBUG_KMS(dp->dev, "got edid: width[%d] x height[%d]\n",
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edid->width_cm, edid->height_cm);
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dp->sink_has_audio = drm_detect_monitor_audio(edid);
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ret = drm_add_edid_modes(connector, edid);
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if (ret)
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drm_connector_update_edid_property(connector,
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edid);
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}
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mutex_unlock(&dp->lock);
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return ret;
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}
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static enum drm_mode_status
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cdn_dp_connector_mode_valid(struct drm_connector *connector,
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struct drm_display_mode *mode)
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{
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struct cdn_dp_device *dp = connector_to_dp(connector);
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struct drm_display_info *display_info = &dp->connector.display_info;
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u32 requested, actual, rate, sink_max, source_max = 0;
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u8 lanes, bpc;
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/* If DP is disconnected, every mode is invalid */
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if (!dp->connected)
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return MODE_BAD;
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switch (display_info->bpc) {
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case 10:
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bpc = 10;
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break;
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case 6:
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bpc = 6;
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break;
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default:
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bpc = 8;
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break;
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}
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requested = mode->clock * bpc * 3 / 1000;
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source_max = dp->lanes;
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sink_max = drm_dp_max_lane_count(dp->dpcd);
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lanes = min(source_max, sink_max);
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source_max = drm_dp_bw_code_to_link_rate(CDN_DP_MAX_LINK_RATE);
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sink_max = drm_dp_max_link_rate(dp->dpcd);
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rate = min(source_max, sink_max);
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actual = rate * lanes / 100;
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/* efficiency is about 0.8 */
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actual = actual * 8 / 10;
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if (requested > actual) {
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DRM_DEV_DEBUG_KMS(dp->dev,
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"requested=%d, actual=%d, clock=%d\n",
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requested, actual, mode->clock);
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return MODE_CLOCK_HIGH;
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}
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return MODE_OK;
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}
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static struct drm_connector_helper_funcs cdn_dp_connector_helper_funcs = {
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.get_modes = cdn_dp_connector_get_modes,
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.mode_valid = cdn_dp_connector_mode_valid,
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};
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static int cdn_dp_firmware_init(struct cdn_dp_device *dp)
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{
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int ret;
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const u32 *iram_data, *dram_data;
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const struct firmware *fw = dp->fw;
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const struct cdn_firmware_header *hdr;
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hdr = (struct cdn_firmware_header *)fw->data;
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if (fw->size != le32_to_cpu(hdr->size_bytes)) {
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DRM_DEV_ERROR(dp->dev, "firmware is invalid\n");
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return -EINVAL;
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}
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iram_data = (const u32 *)(fw->data + hdr->header_size);
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dram_data = (const u32 *)(fw->data + hdr->header_size + hdr->iram_size);
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ret = cdn_dp_load_firmware(dp, iram_data, hdr->iram_size,
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dram_data, hdr->dram_size);
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if (ret)
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return ret;
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ret = cdn_dp_set_firmware_active(dp, true);
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if (ret) {
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DRM_DEV_ERROR(dp->dev, "active ucpu failed: %d\n", ret);
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return ret;
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}
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return cdn_dp_event_config(dp);
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}
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static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp)
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{
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int ret;
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if (!cdn_dp_check_sink_connection(dp))
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return -ENODEV;
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ret = cdn_dp_dpcd_read(dp, DP_DPCD_REV, dp->dpcd,
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DP_RECEIVER_CAP_SIZE);
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if (ret) {
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DRM_DEV_ERROR(dp->dev, "Failed to get caps %d\n", ret);
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return ret;
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}
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kfree(dp->edid);
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dp->edid = drm_do_get_edid(&dp->connector,
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cdn_dp_get_edid_block, dp);
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return 0;
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}
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static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port)
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{
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union extcon_property_value property;
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int ret;
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if (!port->phy_enabled) {
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ret = phy_power_on(port->phy);
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if (ret) {
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DRM_DEV_ERROR(dp->dev, "phy power on failed: %d\n",
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ret);
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goto err_phy;
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}
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port->phy_enabled = true;
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}
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ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
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DPTX_HPD_SEL_MASK | DPTX_HPD_SEL);
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if (ret) {
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DRM_DEV_ERROR(dp->dev, "Failed to write HPD_SEL %d\n", ret);
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goto err_power_on;
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}
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ret = cdn_dp_get_hpd_status(dp);
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if (ret <= 0) {
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if (!ret)
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DRM_DEV_ERROR(dp->dev, "hpd does not exist\n");
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goto err_power_on;
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}
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ret = extcon_get_property(port->extcon, EXTCON_DISP_DP,
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EXTCON_PROP_USB_TYPEC_POLARITY, &property);
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if (ret) {
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DRM_DEV_ERROR(dp->dev, "get property failed\n");
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goto err_power_on;
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}
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port->lanes = cdn_dp_get_port_lanes(port);
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ret = cdn_dp_set_host_cap(dp, port->lanes, property.intval);
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if (ret) {
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DRM_DEV_ERROR(dp->dev, "set host capabilities failed: %d\n",
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ret);
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goto err_power_on;
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}
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dp->active_port = port->id;
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return 0;
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err_power_on:
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if (phy_power_off(port->phy))
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DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
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else
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port->phy_enabled = false;
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err_phy:
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cdn_dp_grf_write(dp, GRF_SOC_CON26,
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DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
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return ret;
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}
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static int cdn_dp_disable_phy(struct cdn_dp_device *dp,
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struct cdn_dp_port *port)
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{
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int ret;
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if (port->phy_enabled) {
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ret = phy_power_off(port->phy);
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if (ret) {
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DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret);
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return ret;
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}
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}
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port->phy_enabled = false;
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port->lanes = 0;
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dp->active_port = -1;
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return 0;
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}
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static int cdn_dp_disable(struct cdn_dp_device *dp)
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{
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int ret, i;
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if (!dp->active)
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return 0;
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for (i = 0; i < dp->ports; i++)
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cdn_dp_disable_phy(dp, dp->port[i]);
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ret = cdn_dp_grf_write(dp, GRF_SOC_CON26,
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DPTX_HPD_SEL_MASK | DPTX_HPD_DEL);
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if (ret) {
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DRM_DEV_ERROR(dp->dev, "Failed to clear hpd sel %d\n",
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ret);
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return ret;
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}
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cdn_dp_set_firmware_active(dp, false);
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cdn_dp_clk_disable(dp);
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dp->active = false;
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dp->max_lanes = 0;
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dp->max_rate = 0;
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if (!dp->connected) {
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kfree(dp->edid);
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dp->edid = NULL;
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}
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return 0;
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}
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static int cdn_dp_enable(struct cdn_dp_device *dp)
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{
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int ret, i, lanes;
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struct cdn_dp_port *port;
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port = cdn_dp_connected_port(dp);
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if (!port) {
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DRM_DEV_ERROR(dp->dev,
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"Can't enable without connection\n");
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return -ENODEV;
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}
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if (dp->active)
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return 0;
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ret = cdn_dp_clk_enable(dp);
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if (ret)
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return ret;
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|
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ret = cdn_dp_firmware_init(dp);
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if (ret) {
|
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DRM_DEV_ERROR(dp->dev, "firmware init failed: %d", ret);
|
|
goto err_clk_disable;
|
|
}
|
|
|
|
/* only enable the port that connected with downstream device */
|
|
for (i = port->id; i < dp->ports; i++) {
|
|
port = dp->port[i];
|
|
lanes = cdn_dp_get_port_lanes(port);
|
|
if (lanes) {
|
|
ret = cdn_dp_enable_phy(dp, port);
|
|
if (ret)
|
|
continue;
|
|
|
|
ret = cdn_dp_get_sink_capability(dp);
|
|
if (ret) {
|
|
cdn_dp_disable_phy(dp, port);
|
|
} else {
|
|
dp->active = true;
|
|
dp->lanes = port->lanes;
|
|
return 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
err_clk_disable:
|
|
cdn_dp_clk_disable(dp);
|
|
return ret;
|
|
}
|
|
|
|
static void cdn_dp_encoder_mode_set(struct drm_encoder *encoder,
|
|
struct drm_display_mode *mode,
|
|
struct drm_display_mode *adjusted)
|
|
{
|
|
struct cdn_dp_device *dp = encoder_to_dp(encoder);
|
|
struct drm_display_info *display_info = &dp->connector.display_info;
|
|
struct video_info *video = &dp->video_info;
|
|
|
|
switch (display_info->bpc) {
|
|
case 10:
|
|
video->color_depth = 10;
|
|
break;
|
|
case 6:
|
|
video->color_depth = 6;
|
|
break;
|
|
default:
|
|
video->color_depth = 8;
|
|
break;
|
|
}
|
|
|
|
video->color_fmt = PXL_RGB;
|
|
video->v_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NVSYNC);
|
|
video->h_sync_polarity = !!(mode->flags & DRM_MODE_FLAG_NHSYNC);
|
|
|
|
drm_mode_copy(&dp->mode, adjusted);
|
|
}
|
|
|
|
static bool cdn_dp_check_link_status(struct cdn_dp_device *dp)
|
|
{
|
|
u8 link_status[DP_LINK_STATUS_SIZE];
|
|
struct cdn_dp_port *port = cdn_dp_connected_port(dp);
|
|
u8 sink_lanes = drm_dp_max_lane_count(dp->dpcd);
|
|
|
|
if (!port || !dp->max_rate || !dp->max_lanes)
|
|
return false;
|
|
|
|
if (cdn_dp_dpcd_read(dp, DP_LANE0_1_STATUS, link_status,
|
|
DP_LINK_STATUS_SIZE)) {
|
|
DRM_ERROR("Failed to get link status\n");
|
|
return false;
|
|
}
|
|
|
|
/* if link training is requested we should perform it always */
|
|
return drm_dp_channel_eq_ok(link_status, min(port->lanes, sink_lanes));
|
|
}
|
|
|
|
static void cdn_dp_audio_handle_plugged_change(struct cdn_dp_device *dp,
|
|
bool plugged)
|
|
{
|
|
if (dp->codec_dev)
|
|
dp->plugged_cb(dp->codec_dev, plugged);
|
|
}
|
|
|
|
static void cdn_dp_encoder_enable(struct drm_encoder *encoder)
|
|
{
|
|
struct cdn_dp_device *dp = encoder_to_dp(encoder);
|
|
int ret, val;
|
|
|
|
ret = drm_of_encoder_active_endpoint_id(dp->dev->of_node, encoder);
|
|
if (ret < 0) {
|
|
DRM_DEV_ERROR(dp->dev, "Could not get vop id, %d", ret);
|
|
return;
|
|
}
|
|
|
|
DRM_DEV_DEBUG_KMS(dp->dev, "vop %s output to cdn-dp\n",
|
|
(ret) ? "LIT" : "BIG");
|
|
if (ret)
|
|
val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16);
|
|
else
|
|
val = DP_SEL_VOP_LIT << 16;
|
|
|
|
ret = cdn_dp_grf_write(dp, GRF_SOC_CON9, val);
|
|
if (ret)
|
|
return;
|
|
|
|
mutex_lock(&dp->lock);
|
|
|
|
ret = cdn_dp_enable(dp);
|
|
if (ret) {
|
|
DRM_DEV_ERROR(dp->dev, "Failed to enable encoder %d\n",
|
|
ret);
|
|
goto out;
|
|
}
|
|
if (!cdn_dp_check_link_status(dp)) {
|
|
ret = cdn_dp_train_link(dp);
|
|
if (ret) {
|
|
DRM_DEV_ERROR(dp->dev, "Failed link train %d\n", ret);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_IDLE);
|
|
if (ret) {
|
|
DRM_DEV_ERROR(dp->dev, "Failed to idle video %d\n", ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = cdn_dp_config_video(dp);
|
|
if (ret) {
|
|
DRM_DEV_ERROR(dp->dev, "Failed to config video %d\n", ret);
|
|
goto out;
|
|
}
|
|
|
|
ret = cdn_dp_set_video_status(dp, CONTROL_VIDEO_VALID);
|
|
if (ret) {
|
|
DRM_DEV_ERROR(dp->dev, "Failed to valid video %d\n", ret);
|
|
goto out;
|
|
}
|
|
|
|
cdn_dp_audio_handle_plugged_change(dp, true);
|
|
|
|
out:
|
|
mutex_unlock(&dp->lock);
|
|
}
|
|
|
|
static void cdn_dp_encoder_disable(struct drm_encoder *encoder)
|
|
{
|
|
struct cdn_dp_device *dp = encoder_to_dp(encoder);
|
|
int ret;
|
|
|
|
mutex_lock(&dp->lock);
|
|
cdn_dp_audio_handle_plugged_change(dp, false);
|
|
|
|
if (dp->active) {
|
|
ret = cdn_dp_disable(dp);
|
|
if (ret) {
|
|
DRM_DEV_ERROR(dp->dev, "Failed to disable encoder %d\n",
|
|
ret);
|
|
}
|
|
}
|
|
mutex_unlock(&dp->lock);
|
|
|
|
/*
|
|
* In the following 2 cases, we need to run the event_work to re-enable
|
|
* the DP:
|
|
* 1. If there is not just one port device is connected, and remove one
|
|
* device from a port, the DP will be disabled here, at this case,
|
|
* run the event_work to re-open DP for the other port.
|
|
* 2. If re-training or re-config failed, the DP will be disabled here.
|
|
* run the event_work to re-connect it.
|
|
*/
|
|
if (!dp->connected && cdn_dp_connected_port(dp))
|
|
schedule_work(&dp->event_work);
|
|
}
|
|
|
|
static int cdn_dp_encoder_atomic_check(struct drm_encoder *encoder,
|
|
struct drm_crtc_state *crtc_state,
|
|
struct drm_connector_state *conn_state)
|
|
{
|
|
struct rockchip_crtc_state *s = to_rockchip_crtc_state(crtc_state);
|
|
|
|
s->output_mode = ROCKCHIP_OUT_MODE_AAAA;
|
|
s->output_type = DRM_MODE_CONNECTOR_DisplayPort;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct drm_encoder_helper_funcs cdn_dp_encoder_helper_funcs = {
|
|
.mode_set = cdn_dp_encoder_mode_set,
|
|
.enable = cdn_dp_encoder_enable,
|
|
.disable = cdn_dp_encoder_disable,
|
|
.atomic_check = cdn_dp_encoder_atomic_check,
|
|
};
|
|
|
|
static int cdn_dp_parse_dt(struct cdn_dp_device *dp)
|
|
{
|
|
struct device *dev = dp->dev;
|
|
struct device_node *np = dev->of_node;
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
|
|
dp->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
|
|
if (IS_ERR(dp->grf)) {
|
|
DRM_DEV_ERROR(dev, "cdn-dp needs rockchip,grf property\n");
|
|
return PTR_ERR(dp->grf);
|
|
}
|
|
|
|
dp->regs = devm_platform_ioremap_resource(pdev, 0);
|
|
if (IS_ERR(dp->regs)) {
|
|
DRM_DEV_ERROR(dev, "ioremap reg failed\n");
|
|
return PTR_ERR(dp->regs);
|
|
}
|
|
|
|
dp->core_clk = devm_clk_get(dev, "core-clk");
|
|
if (IS_ERR(dp->core_clk)) {
|
|
DRM_DEV_ERROR(dev, "cannot get core_clk_dp\n");
|
|
return PTR_ERR(dp->core_clk);
|
|
}
|
|
|
|
dp->pclk = devm_clk_get(dev, "pclk");
|
|
if (IS_ERR(dp->pclk)) {
|
|
DRM_DEV_ERROR(dev, "cannot get pclk\n");
|
|
return PTR_ERR(dp->pclk);
|
|
}
|
|
|
|
dp->spdif_clk = devm_clk_get(dev, "spdif");
|
|
if (IS_ERR(dp->spdif_clk)) {
|
|
DRM_DEV_ERROR(dev, "cannot get spdif_clk\n");
|
|
return PTR_ERR(dp->spdif_clk);
|
|
}
|
|
|
|
dp->grf_clk = devm_clk_get(dev, "grf");
|
|
if (IS_ERR(dp->grf_clk)) {
|
|
DRM_DEV_ERROR(dev, "cannot get grf clk\n");
|
|
return PTR_ERR(dp->grf_clk);
|
|
}
|
|
|
|
dp->spdif_rst = devm_reset_control_get(dev, "spdif");
|
|
if (IS_ERR(dp->spdif_rst)) {
|
|
DRM_DEV_ERROR(dev, "no spdif reset control found\n");
|
|
return PTR_ERR(dp->spdif_rst);
|
|
}
|
|
|
|
dp->dptx_rst = devm_reset_control_get(dev, "dptx");
|
|
if (IS_ERR(dp->dptx_rst)) {
|
|
DRM_DEV_ERROR(dev, "no uphy reset control found\n");
|
|
return PTR_ERR(dp->dptx_rst);
|
|
}
|
|
|
|
dp->core_rst = devm_reset_control_get(dev, "core");
|
|
if (IS_ERR(dp->core_rst)) {
|
|
DRM_DEV_ERROR(dev, "no core reset control found\n");
|
|
return PTR_ERR(dp->core_rst);
|
|
}
|
|
|
|
dp->apb_rst = devm_reset_control_get(dev, "apb");
|
|
if (IS_ERR(dp->apb_rst)) {
|
|
DRM_DEV_ERROR(dev, "no apb reset control found\n");
|
|
return PTR_ERR(dp->apb_rst);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cdn_dp_audio_hw_params(struct device *dev, void *data,
|
|
struct hdmi_codec_daifmt *daifmt,
|
|
struct hdmi_codec_params *params)
|
|
{
|
|
struct cdn_dp_device *dp = dev_get_drvdata(dev);
|
|
struct audio_info audio = {
|
|
.sample_width = params->sample_width,
|
|
.sample_rate = params->sample_rate,
|
|
.channels = params->channels,
|
|
};
|
|
int ret;
|
|
|
|
mutex_lock(&dp->lock);
|
|
if (!dp->active) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
switch (daifmt->fmt) {
|
|
case HDMI_I2S:
|
|
audio.format = AFMT_I2S;
|
|
break;
|
|
case HDMI_SPDIF:
|
|
audio.format = AFMT_SPDIF;
|
|
break;
|
|
default:
|
|
DRM_DEV_ERROR(dev, "Invalid format %d\n", daifmt->fmt);
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
ret = cdn_dp_audio_config(dp, &audio);
|
|
if (!ret)
|
|
dp->audio_info = audio;
|
|
|
|
out:
|
|
mutex_unlock(&dp->lock);
|
|
return ret;
|
|
}
|
|
|
|
static void cdn_dp_audio_shutdown(struct device *dev, void *data)
|
|
{
|
|
struct cdn_dp_device *dp = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
mutex_lock(&dp->lock);
|
|
if (!dp->active)
|
|
goto out;
|
|
|
|
ret = cdn_dp_audio_stop(dp, &dp->audio_info);
|
|
if (!ret)
|
|
dp->audio_info.format = AFMT_UNUSED;
|
|
out:
|
|
mutex_unlock(&dp->lock);
|
|
}
|
|
|
|
static int cdn_dp_audio_mute_stream(struct device *dev, void *data,
|
|
bool enable, int direction)
|
|
{
|
|
struct cdn_dp_device *dp = dev_get_drvdata(dev);
|
|
int ret;
|
|
|
|
mutex_lock(&dp->lock);
|
|
if (!dp->active) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
|
|
ret = cdn_dp_audio_mute(dp, enable);
|
|
|
|
out:
|
|
mutex_unlock(&dp->lock);
|
|
return ret;
|
|
}
|
|
|
|
static int cdn_dp_audio_get_eld(struct device *dev, void *data,
|
|
u8 *buf, size_t len)
|
|
{
|
|
struct cdn_dp_device *dp = dev_get_drvdata(dev);
|
|
|
|
memcpy(buf, dp->connector.eld, min(sizeof(dp->connector.eld), len));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cdn_dp_audio_hook_plugged_cb(struct device *dev, void *data,
|
|
hdmi_codec_plugged_cb fn,
|
|
struct device *codec_dev)
|
|
{
|
|
struct cdn_dp_device *dp = dev_get_drvdata(dev);
|
|
|
|
mutex_lock(&dp->lock);
|
|
dp->plugged_cb = fn;
|
|
dp->codec_dev = codec_dev;
|
|
cdn_dp_audio_handle_plugged_change(dp, dp->connected);
|
|
mutex_unlock(&dp->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct hdmi_codec_ops audio_codec_ops = {
|
|
.hw_params = cdn_dp_audio_hw_params,
|
|
.audio_shutdown = cdn_dp_audio_shutdown,
|
|
.mute_stream = cdn_dp_audio_mute_stream,
|
|
.get_eld = cdn_dp_audio_get_eld,
|
|
.hook_plugged_cb = cdn_dp_audio_hook_plugged_cb,
|
|
.no_capture_mute = 1,
|
|
};
|
|
|
|
static int cdn_dp_audio_codec_init(struct cdn_dp_device *dp,
|
|
struct device *dev)
|
|
{
|
|
struct hdmi_codec_pdata codec_data = {
|
|
.i2s = 1,
|
|
.spdif = 1,
|
|
.ops = &audio_codec_ops,
|
|
.max_i2s_channels = 8,
|
|
};
|
|
|
|
dp->audio_pdev = platform_device_register_data(
|
|
dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
|
|
&codec_data, sizeof(codec_data));
|
|
|
|
return PTR_ERR_OR_ZERO(dp->audio_pdev);
|
|
}
|
|
|
|
static int cdn_dp_request_firmware(struct cdn_dp_device *dp)
|
|
{
|
|
int ret;
|
|
unsigned long timeout = jiffies + msecs_to_jiffies(CDN_FW_TIMEOUT_MS);
|
|
unsigned long sleep = 1000;
|
|
|
|
WARN_ON(!mutex_is_locked(&dp->lock));
|
|
|
|
if (dp->fw_loaded)
|
|
return 0;
|
|
|
|
/* Drop the lock before getting the firmware to avoid blocking boot */
|
|
mutex_unlock(&dp->lock);
|
|
|
|
while (time_before(jiffies, timeout)) {
|
|
ret = request_firmware(&dp->fw, CDN_DP_FIRMWARE, dp->dev);
|
|
if (ret == -ENOENT) {
|
|
msleep(sleep);
|
|
sleep *= 2;
|
|
continue;
|
|
} else if (ret) {
|
|
DRM_DEV_ERROR(dp->dev,
|
|
"failed to request firmware: %d\n", ret);
|
|
goto out;
|
|
}
|
|
|
|
dp->fw_loaded = true;
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
|
|
DRM_DEV_ERROR(dp->dev, "Timed out trying to load firmware\n");
|
|
ret = -ETIMEDOUT;
|
|
out:
|
|
mutex_lock(&dp->lock);
|
|
return ret;
|
|
}
|
|
|
|
static void cdn_dp_pd_event_work(struct work_struct *work)
|
|
{
|
|
struct cdn_dp_device *dp = container_of(work, struct cdn_dp_device,
|
|
event_work);
|
|
struct drm_connector *connector = &dp->connector;
|
|
enum drm_connector_status old_status;
|
|
|
|
int ret;
|
|
|
|
mutex_lock(&dp->lock);
|
|
|
|
if (dp->suspended)
|
|
goto out;
|
|
|
|
ret = cdn_dp_request_firmware(dp);
|
|
if (ret)
|
|
goto out;
|
|
|
|
dp->connected = true;
|
|
|
|
/* Not connected, notify userspace to disable the block */
|
|
if (!cdn_dp_connected_port(dp)) {
|
|
DRM_DEV_INFO(dp->dev, "Not connected. Disabling cdn\n");
|
|
dp->connected = false;
|
|
|
|
/* Connected but not enabled, enable the block */
|
|
} else if (!dp->active) {
|
|
DRM_DEV_INFO(dp->dev, "Connected, not enabled. Enabling cdn\n");
|
|
ret = cdn_dp_enable(dp);
|
|
if (ret) {
|
|
DRM_DEV_ERROR(dp->dev, "Enable dp failed %d\n", ret);
|
|
dp->connected = false;
|
|
}
|
|
|
|
/* Enabled and connected to a dongle without a sink, notify userspace */
|
|
} else if (!cdn_dp_check_sink_connection(dp)) {
|
|
DRM_DEV_INFO(dp->dev, "Connected without sink. Assert hpd\n");
|
|
dp->connected = false;
|
|
|
|
/* Enabled and connected with a sink, re-train if requested */
|
|
} else if (!cdn_dp_check_link_status(dp)) {
|
|
unsigned int rate = dp->max_rate;
|
|
unsigned int lanes = dp->max_lanes;
|
|
struct drm_display_mode *mode = &dp->mode;
|
|
|
|
DRM_DEV_INFO(dp->dev, "Connected with sink. Re-train link\n");
|
|
ret = cdn_dp_train_link(dp);
|
|
if (ret) {
|
|
dp->connected = false;
|
|
DRM_DEV_ERROR(dp->dev, "Train link failed %d\n", ret);
|
|
goto out;
|
|
}
|
|
|
|
/* If training result is changed, update the video config */
|
|
if (mode->clock &&
|
|
(rate != dp->max_rate || lanes != dp->max_lanes)) {
|
|
ret = cdn_dp_config_video(dp);
|
|
if (ret) {
|
|
dp->connected = false;
|
|
DRM_DEV_ERROR(dp->dev,
|
|
"Failed to config video %d\n",
|
|
ret);
|
|
}
|
|
}
|
|
}
|
|
|
|
out:
|
|
mutex_unlock(&dp->lock);
|
|
|
|
old_status = connector->status;
|
|
connector->status = connector->funcs->detect(connector, false);
|
|
if (old_status != connector->status)
|
|
drm_kms_helper_hotplug_event(dp->drm_dev);
|
|
}
|
|
|
|
static int cdn_dp_pd_event(struct notifier_block *nb,
|
|
unsigned long event, void *priv)
|
|
{
|
|
struct cdn_dp_port *port = container_of(nb, struct cdn_dp_port,
|
|
event_nb);
|
|
struct cdn_dp_device *dp = port->dp;
|
|
|
|
/*
|
|
* It would be nice to be able to just do the work inline right here.
|
|
* However, we need to make a bunch of calls that might sleep in order
|
|
* to turn on the block/phy, so use a worker instead.
|
|
*/
|
|
schedule_work(&dp->event_work);
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static int cdn_dp_bind(struct device *dev, struct device *master, void *data)
|
|
{
|
|
struct cdn_dp_device *dp = dev_get_drvdata(dev);
|
|
struct drm_encoder *encoder;
|
|
struct drm_connector *connector;
|
|
struct cdn_dp_port *port;
|
|
struct drm_device *drm_dev = data;
|
|
int ret, i;
|
|
|
|
ret = cdn_dp_parse_dt(dp);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
dp->drm_dev = drm_dev;
|
|
dp->connected = false;
|
|
dp->active = false;
|
|
dp->active_port = -1;
|
|
dp->fw_loaded = false;
|
|
|
|
INIT_WORK(&dp->event_work, cdn_dp_pd_event_work);
|
|
|
|
encoder = &dp->encoder.encoder;
|
|
|
|
encoder->possible_crtcs = drm_of_find_possible_crtcs(drm_dev,
|
|
dev->of_node);
|
|
DRM_DEBUG_KMS("possible_crtcs = 0x%x\n", encoder->possible_crtcs);
|
|
|
|
ret = drm_simple_encoder_init(drm_dev, encoder,
|
|
DRM_MODE_ENCODER_TMDS);
|
|
if (ret) {
|
|
DRM_ERROR("failed to initialize encoder with drm\n");
|
|
return ret;
|
|
}
|
|
|
|
drm_encoder_helper_add(encoder, &cdn_dp_encoder_helper_funcs);
|
|
|
|
connector = &dp->connector;
|
|
connector->polled = DRM_CONNECTOR_POLL_HPD;
|
|
connector->dpms = DRM_MODE_DPMS_OFF;
|
|
|
|
ret = drm_connector_init(drm_dev, connector,
|
|
&cdn_dp_atomic_connector_funcs,
|
|
DRM_MODE_CONNECTOR_DisplayPort);
|
|
if (ret) {
|
|
DRM_ERROR("failed to initialize connector with drm\n");
|
|
goto err_free_encoder;
|
|
}
|
|
|
|
drm_connector_helper_add(connector, &cdn_dp_connector_helper_funcs);
|
|
|
|
ret = drm_connector_attach_encoder(connector, encoder);
|
|
if (ret) {
|
|
DRM_ERROR("failed to attach connector and encoder\n");
|
|
goto err_free_connector;
|
|
}
|
|
|
|
for (i = 0; i < dp->ports; i++) {
|
|
port = dp->port[i];
|
|
|
|
port->event_nb.notifier_call = cdn_dp_pd_event;
|
|
ret = devm_extcon_register_notifier(dp->dev, port->extcon,
|
|
EXTCON_DISP_DP,
|
|
&port->event_nb);
|
|
if (ret) {
|
|
DRM_DEV_ERROR(dev,
|
|
"register EXTCON_DISP_DP notifier err\n");
|
|
goto err_free_connector;
|
|
}
|
|
}
|
|
|
|
pm_runtime_enable(dev);
|
|
|
|
schedule_work(&dp->event_work);
|
|
|
|
return 0;
|
|
|
|
err_free_connector:
|
|
drm_connector_cleanup(connector);
|
|
err_free_encoder:
|
|
drm_encoder_cleanup(encoder);
|
|
return ret;
|
|
}
|
|
|
|
static void cdn_dp_unbind(struct device *dev, struct device *master, void *data)
|
|
{
|
|
struct cdn_dp_device *dp = dev_get_drvdata(dev);
|
|
struct drm_encoder *encoder = &dp->encoder.encoder;
|
|
struct drm_connector *connector = &dp->connector;
|
|
|
|
cancel_work_sync(&dp->event_work);
|
|
cdn_dp_encoder_disable(encoder);
|
|
encoder->funcs->destroy(encoder);
|
|
connector->funcs->destroy(connector);
|
|
|
|
pm_runtime_disable(dev);
|
|
if (dp->fw_loaded)
|
|
release_firmware(dp->fw);
|
|
kfree(dp->edid);
|
|
dp->edid = NULL;
|
|
}
|
|
|
|
static const struct component_ops cdn_dp_component_ops = {
|
|
.bind = cdn_dp_bind,
|
|
.unbind = cdn_dp_unbind,
|
|
};
|
|
|
|
static int cdn_dp_suspend(struct device *dev)
|
|
{
|
|
struct cdn_dp_device *dp = dev_get_drvdata(dev);
|
|
int ret = 0;
|
|
|
|
mutex_lock(&dp->lock);
|
|
if (dp->active)
|
|
ret = cdn_dp_disable(dp);
|
|
dp->suspended = true;
|
|
mutex_unlock(&dp->lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static __maybe_unused int cdn_dp_resume(struct device *dev)
|
|
{
|
|
struct cdn_dp_device *dp = dev_get_drvdata(dev);
|
|
|
|
mutex_lock(&dp->lock);
|
|
dp->suspended = false;
|
|
if (dp->fw_loaded)
|
|
schedule_work(&dp->event_work);
|
|
mutex_unlock(&dp->lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cdn_dp_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
const struct of_device_id *match;
|
|
struct cdn_dp_data *dp_data;
|
|
struct cdn_dp_port *port;
|
|
struct cdn_dp_device *dp;
|
|
struct extcon_dev *extcon;
|
|
struct phy *phy;
|
|
int i;
|
|
|
|
dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
|
|
if (!dp)
|
|
return -ENOMEM;
|
|
dp->dev = dev;
|
|
|
|
match = of_match_node(cdn_dp_dt_ids, pdev->dev.of_node);
|
|
dp_data = (struct cdn_dp_data *)match->data;
|
|
|
|
for (i = 0; i < dp_data->max_phy; i++) {
|
|
extcon = extcon_get_edev_by_phandle(dev, i);
|
|
phy = devm_of_phy_get_by_index(dev, dev->of_node, i);
|
|
|
|
if (PTR_ERR(extcon) == -EPROBE_DEFER ||
|
|
PTR_ERR(phy) == -EPROBE_DEFER)
|
|
return -EPROBE_DEFER;
|
|
|
|
if (IS_ERR(extcon) || IS_ERR(phy))
|
|
continue;
|
|
|
|
port = devm_kzalloc(dev, sizeof(*port), GFP_KERNEL);
|
|
if (!port)
|
|
return -ENOMEM;
|
|
|
|
port->extcon = extcon;
|
|
port->phy = phy;
|
|
port->dp = dp;
|
|
port->id = i;
|
|
dp->port[dp->ports++] = port;
|
|
}
|
|
|
|
if (!dp->ports) {
|
|
DRM_DEV_ERROR(dev, "missing extcon or phy\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
mutex_init(&dp->lock);
|
|
dev_set_drvdata(dev, dp);
|
|
|
|
cdn_dp_audio_codec_init(dp, dev);
|
|
|
|
return component_add(dev, &cdn_dp_component_ops);
|
|
}
|
|
|
|
static int cdn_dp_remove(struct platform_device *pdev)
|
|
{
|
|
struct cdn_dp_device *dp = platform_get_drvdata(pdev);
|
|
|
|
platform_device_unregister(dp->audio_pdev);
|
|
cdn_dp_suspend(dp->dev);
|
|
component_del(&pdev->dev, &cdn_dp_component_ops);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void cdn_dp_shutdown(struct platform_device *pdev)
|
|
{
|
|
struct cdn_dp_device *dp = platform_get_drvdata(pdev);
|
|
|
|
cdn_dp_suspend(dp->dev);
|
|
}
|
|
|
|
static const struct dev_pm_ops cdn_dp_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(cdn_dp_suspend,
|
|
cdn_dp_resume)
|
|
};
|
|
|
|
struct platform_driver cdn_dp_driver = {
|
|
.probe = cdn_dp_probe,
|
|
.remove = cdn_dp_remove,
|
|
.shutdown = cdn_dp_shutdown,
|
|
.driver = {
|
|
.name = "cdn-dp",
|
|
.owner = THIS_MODULE,
|
|
.of_match_table = of_match_ptr(cdn_dp_dt_ids),
|
|
.pm = &cdn_dp_pm_ops,
|
|
},
|
|
};
|