diff options
Diffstat (limited to 'drivers/gpu/drm/rockchip/cdn-dp-core.c')
| -rw-r--r-- | drivers/gpu/drm/rockchip/cdn-dp-core.c | 1260 |
1 files changed, 1260 insertions, 0 deletions
diff --git a/drivers/gpu/drm/rockchip/cdn-dp-core.c b/drivers/gpu/drm/rockchip/cdn-dp-core.c new file mode 100644 index 000000000000..9ab67a670885 --- /dev/null +++ b/drivers/gpu/drm/rockchip/cdn-dp-core.c @@ -0,0 +1,1260 @@ +/* + * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd + * Author: Chris Zhong <zyw@rock-chips.com> + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + */ + +#include <drm/drmP.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_dp_helper.h> +#include <drm/drm_edid.h> +#include <drm/drm_of.h> + +#include <linux/clk.h> +#include <linux/component.h> +#include <linux/extcon.h> +#include <linux/firmware.h> +#include <linux/regmap.h> +#include <linux/reset.h> +#include <linux/mfd/syscon.h> +#include <linux/phy/phy.h> + +#include <sound/hdmi-codec.h> + +#include "cdn-dp-core.h" +#include "cdn-dp-reg.h" +#include "rockchip_drm_vop.h" + +#define connector_to_dp(c) \ + container_of(c, struct cdn_dp_device, connector) + +#define encoder_to_dp(c) \ + container_of(c, struct cdn_dp_device, encoder) + +#define GRF_SOC_CON9 0x6224 +#define DP_SEL_VOP_LIT BIT(12) +#define GRF_SOC_CON26 0x6268 +#define UPHY_SEL_BIT 3 +#define UPHY_SEL_MASK BIT(19) +#define DPTX_HPD_SEL (3 << 12) +#define DPTX_HPD_DEL (2 << 12) +#define DPTX_HPD_SEL_MASK (3 << 28) + +#define CDN_FW_TIMEOUT_MS (64 * 1000) +#define CDN_DPCD_TIMEOUT_MS 5000 +#define CDN_DP_FIRMWARE "rockchip/dptx.bin" + +struct cdn_dp_data { + u8 max_phy; +}; + +struct cdn_dp_data rk3399_cdn_dp = { + .max_phy = 2, +}; + +static const struct of_device_id cdn_dp_dt_ids[] = { + { .compatible = "rockchip,rk3399-cdn-dp", + .data = (void *)&rk3399_cdn_dp }, + {} +}; + +MODULE_DEVICE_TABLE(of, cdn_dp_dt_ids); + +static int cdn_dp_grf_write(struct cdn_dp_device *dp, + unsigned int reg, unsigned int val) +{ + int ret; + + ret = clk_prepare_enable(dp->grf_clk); + if (ret) { + DRM_DEV_ERROR(dp->dev, "Failed to prepare_enable grf clock\n"); + return ret; + } + + ret = regmap_write(dp->grf, reg, val); + if (ret) { + DRM_DEV_ERROR(dp->dev, "Could not write to GRF: %d\n", ret); + return ret; + } + + clk_disable_unprepare(dp->grf_clk); + + return 0; +} + +static int cdn_dp_clk_enable(struct cdn_dp_device *dp) +{ + int ret; + u32 rate; + + ret = clk_prepare_enable(dp->pclk); + if (ret < 0) { + DRM_DEV_ERROR(dp->dev, "cannot enable dp pclk %d\n", ret); + goto err_pclk; + } + + ret = clk_prepare_enable(dp->core_clk); + if (ret < 0) { + DRM_DEV_ERROR(dp->dev, "cannot enable core_clk %d\n", ret); + goto err_core_clk; + } + + ret = pm_runtime_get_sync(dp->dev); + if (ret < 0) { + DRM_DEV_ERROR(dp->dev, "cannot get pm runtime %d\n", ret); + goto err_pclk; + } + + reset_control_assert(dp->core_rst); + reset_control_assert(dp->dptx_rst); + reset_control_assert(dp->apb_rst); + reset_control_deassert(dp->core_rst); + reset_control_deassert(dp->dptx_rst); + reset_control_deassert(dp->apb_rst); + + rate = clk_get_rate(dp->core_clk); + if (!rate) { + DRM_DEV_ERROR(dp->dev, "get clk rate failed: %d\n", rate); + goto err_set_rate; + } + + cdn_dp_set_fw_clk(dp, rate); + cdn_dp_clock_reset(dp); + + return 0; + +err_set_rate: + clk_disable_unprepare(dp->core_clk); +err_core_clk: + clk_disable_unprepare(dp->pclk); +err_pclk: + return ret; +} + +static void cdn_dp_clk_disable(struct cdn_dp_device *dp) +{ + pm_runtime_put_sync(dp->dev); + clk_disable_unprepare(dp->pclk); + clk_disable_unprepare(dp->core_clk); +} + +static int cdn_dp_get_port_lanes(struct cdn_dp_port *port) +{ + struct extcon_dev *edev = port->extcon; + union extcon_property_value property; + int dptx; + u8 lanes; + + dptx = extcon_get_state(edev, EXTCON_DISP_DP); + if (dptx > 0) { + extcon_get_property(edev, EXTCON_DISP_DP, + EXTCON_PROP_USB_SS, &property); + if (property.intval) + lanes = 2; + else + lanes = 4; + } else { + lanes = 0; + } + + return lanes; +} + +static int cdn_dp_get_sink_count(struct cdn_dp_device *dp, u8 *sink_count) +{ + int ret; + u8 value; + + *sink_count = 0; + ret = cdn_dp_dpcd_read(dp, DP_SINK_COUNT, &value, 1); + if (ret) + return ret; + + *sink_count = DP_GET_SINK_COUNT(value); + return 0; +} + +static struct cdn_dp_port *cdn_dp_connected_port(struct cdn_dp_device *dp) +{ + struct cdn_dp_port *port; + int i, lanes; + + for (i = 0; i < dp->ports; i++) { + port = dp->port[i]; + lanes = cdn_dp_get_port_lanes(port); + if (lanes) + return port; + } + return NULL; +} + +static bool cdn_dp_check_sink_connection(struct cdn_dp_device *dp) +{ + unsigned long timeout = jiffies + msecs_to_jiffies(CDN_DPCD_TIMEOUT_MS); + struct cdn_dp_port *port; + u8 sink_count = 0; + + if (dp->active_port < 0 || dp->active_port >= dp->ports) { + DRM_DEV_ERROR(dp->dev, "active_port is wrong!\n"); + return false; + } + + port = dp->port[dp->active_port]; + + /* + * Attempt to read sink count, retry in case the sink may not be ready. + * + * Sinks are *supposed* to come up within 1ms from an off state, but + * some docks need more time to power up. + */ + while (time_before(jiffies, timeout)) { + if (!extcon_get_state(port->extcon, EXTCON_DISP_DP)) + return false; + + if (!cdn_dp_get_sink_count(dp, &sink_count)) + return sink_count ? true : false; + + usleep_range(5000, 10000); + } + + DRM_DEV_ERROR(dp->dev, "Get sink capability timed out\n"); + return false; +} + +static enum drm_connector_status +cdn_dp_connector_detect(struct drm_connector *connector, bool force) +{ + struct cdn_dp_device *dp = connector_to_dp(connector); + enum drm_connector_status status = connector_status_disconnected; + + mutex_lock(&dp->lock); + if (dp->connected) + status = connector_status_connected; + mutex_unlock(&dp->lock); + + return status; +} + +static void cdn_dp_connector_destroy(struct drm_connector *connector) +{ + drm_connector_unregister(connector); + drm_connector_cleanup(connector); +} + +static const struct drm_connector_funcs cdn_dp_atomic_connector_funcs = { + .dpms = drm_atomic_helper_connector_dpms, + .detect = cdn_dp_connector_detect, + .destroy = cdn_dp_connector_destroy, + .fill_modes = drm_helper_probe_single_connector_modes, + .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 int cdn_dp_connector_get_modes(struct drm_connector *connector) +{ + struct cdn_dp_device *dp = connector_to_dp(connector); + struct edid *edid; + int ret = 0; + + mutex_lock(&dp->lock); + edid = dp->edid; + if (edid) { + DRM_DEV_DEBUG_KMS(dp->dev, "got edid: width[%d] x height[%d]\n", + edid->width_cm, edid->height_cm); + + dp->sink_has_audio = drm_detect_monitor_audio(edid); + ret = drm_add_edid_modes(connector, edid); + if (ret) { + drm_mode_connector_update_edid_property(connector, + edid); + drm_edid_to_eld(connector, edid); + } + } + mutex_unlock(&dp->lock); + + return ret; +} + +static struct drm_encoder * +cdn_dp_connector_best_encoder(struct drm_connector *connector) +{ + struct cdn_dp_device *dp = connector_to_dp(connector); + + return &dp->encoder; +} + +static int cdn_dp_connector_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + struct cdn_dp_device *dp = connector_to_dp(connector); + struct drm_display_info *display_info = &dp->connector.display_info; + u32 requested, actual, rate, sink_max, source_max = 0; + u8 lanes, bpc; + + /* If DP is disconnected, every mode is invalid */ + if (!dp->connected) + return MODE_BAD; + + switch (display_info->bpc) { + case 10: + bpc = 10; + break; + case 6: + bpc = 6; + break; + default: + bpc = 8; + break; + } + + requested = mode->clock * bpc * 3 / 1000; + + source_max = dp->lanes; + sink_max = drm_dp_max_lane_count(dp->dpcd); + lanes = min(source_max, sink_max); + + source_max = drm_dp_bw_code_to_link_rate(CDN_DP_MAX_LINK_RATE); + sink_max = drm_dp_max_link_rate(dp->dpcd); + rate = min(source_max, sink_max); + + actual = rate * lanes / 100; + + /* efficiency is about 0.8 */ + actual = actual * 8 / 10; + + if (requested > actual) { + DRM_DEV_DEBUG_KMS(dp->dev, + "requested=%d, actual=%d, clock=%d\n", + requested, actual, mode->clock); + return MODE_CLOCK_HIGH; + } + + return MODE_OK; +} + +static struct drm_connector_helper_funcs cdn_dp_connector_helper_funcs = { + .get_modes = cdn_dp_connector_get_modes, + .best_encoder = cdn_dp_connector_best_encoder, + .mode_valid = cdn_dp_connector_mode_valid, +}; + +static int cdn_dp_firmware_init(struct cdn_dp_device *dp) +{ + int ret; + const u32 *iram_data, *dram_data; + const struct firmware *fw = dp->fw; + const struct cdn_firmware_header *hdr; + + hdr = (struct cdn_firmware_header *)fw->data; + if (fw->size != le32_to_cpu(hdr->size_bytes)) { + DRM_DEV_ERROR(dp->dev, "firmware is invalid\n"); + return -EINVAL; + } + + iram_data = (const u32 *)(fw->data + hdr->header_size); + dram_data = (const u32 *)(fw->data + hdr->header_size + hdr->iram_size); + + ret = cdn_dp_load_firmware(dp, iram_data, hdr->iram_size, + dram_data, hdr->dram_size); + if (ret) + return ret; + + ret = cdn_dp_set_firmware_active(dp, true); + if (ret) { + DRM_DEV_ERROR(dp->dev, "active ucpu failed: %d\n", ret); + return ret; + } + + return cdn_dp_event_config(dp); +} + +static int cdn_dp_get_sink_capability(struct cdn_dp_device *dp) +{ + int ret; + + if (!cdn_dp_check_sink_connection(dp)) + return -ENODEV; + + ret = cdn_dp_dpcd_read(dp, DP_DPCD_REV, dp->dpcd, + DP_RECEIVER_CAP_SIZE); + if (ret) { + DRM_DEV_ERROR(dp->dev, "Failed to get caps %d\n", ret); + return ret; + } + + kfree(dp->edid); + dp->edid = drm_do_get_edid(&dp->connector, + cdn_dp_get_edid_block, dp); + return 0; +} + +static int cdn_dp_enable_phy(struct cdn_dp_device *dp, struct cdn_dp_port *port) +{ + union extcon_property_value property; + int ret; + + ret = cdn_dp_grf_write(dp, GRF_SOC_CON26, + (port->id << UPHY_SEL_BIT) | UPHY_SEL_MASK); + if (ret) + return ret; + + if (!port->phy_enabled) { + ret = phy_power_on(port->phy); + if (ret) { + DRM_DEV_ERROR(dp->dev, "phy power on failed: %d\n", + ret); + goto err_phy; + } + port->phy_enabled = true; + } + + ret = cdn_dp_grf_write(dp, GRF_SOC_CON26, + DPTX_HPD_SEL_MASK | DPTX_HPD_SEL); + if (ret) { + DRM_DEV_ERROR(dp->dev, "Failed to write HPD_SEL %d\n", ret); + goto err_power_on; + } + + ret = cdn_dp_get_hpd_status(dp); + if (ret <= 0) { + if (!ret) + DRM_DEV_ERROR(dp->dev, "hpd does not exist\n"); + goto err_power_on; + } + + ret = extcon_get_property(port->extcon, EXTCON_DISP_DP, + EXTCON_PROP_USB_TYPEC_POLARITY, &property); + if (ret) { + DRM_DEV_ERROR(dp->dev, "get property failed\n"); + goto err_power_on; + } + + port->lanes = cdn_dp_get_port_lanes(port); + ret = cdn_dp_set_host_cap(dp, port->lanes, property.intval); + if (ret) { + DRM_DEV_ERROR(dp->dev, "set host capabilities failed: %d\n", + ret); + goto err_power_on; + } + + dp->active_port = port->id; + return 0; + +err_power_on: + if (phy_power_off(port->phy)) + DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret); + else + port->phy_enabled = false; + +err_phy: + cdn_dp_grf_write(dp, GRF_SOC_CON26, + DPTX_HPD_SEL_MASK | DPTX_HPD_DEL); + return ret; +} + +static int cdn_dp_disable_phy(struct cdn_dp_device *dp, + struct cdn_dp_port *port) +{ + int ret; + + if (port->phy_enabled) { + ret = phy_power_off(port->phy); + if (ret) { + DRM_DEV_ERROR(dp->dev, "phy power off failed: %d", ret); + return ret; + } + } + + port->phy_enabled = false; + port->lanes = 0; + dp->active_port = -1; + return 0; +} + +static int cdn_dp_disable(struct cdn_dp_device *dp) +{ + int ret, i; + + if (!dp->active) + return 0; + + for (i = 0; i < dp->ports; i++) + cdn_dp_disable_phy(dp, dp->port[i]); + + ret = cdn_dp_grf_write(dp, GRF_SOC_CON26, + DPTX_HPD_SEL_MASK | DPTX_HPD_DEL); + if (ret) { + DRM_DEV_ERROR(dp->dev, "Failed to clear hpd sel %d\n", + ret); + return ret; + } + + cdn_dp_set_firmware_active(dp, false); + cdn_dp_clk_disable(dp); + dp->active = false; + dp->link.rate = 0; + dp->link.num_lanes = 0; + if (!dp->connected) { + kfree(dp->edid); + dp->edid = NULL; + } + + return 0; +} + +static int cdn_dp_enable(struct cdn_dp_device *dp) +{ + int ret, i, lanes; + struct cdn_dp_port *port; + + port = cdn_dp_connected_port(dp); + if (!port) { + DRM_DEV_ERROR(dp->dev, + "Can't enable without connection\n"); + return -ENODEV; + } + + if (dp->active) + return 0; + + ret = cdn_dp_clk_enable(dp); + if (ret) + return ret; + + ret = cdn_dp_firmware_init(dp); + if (ret) { + 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); + + memcpy(&dp->mode, adjusted, sizeof(*mode)); +} + +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->link.rate || !dp->link.num_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_encoder_enable(struct drm_encoder *encoder) +{ + struct cdn_dp_device *dp = encoder_to_dp(encoder); + int ret, val; + struct rockchip_crtc_state *state; + + 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"); + state = to_rockchip_crtc_state(encoder->crtc->state); + if (ret) { + val = DP_SEL_VOP_LIT | (DP_SEL_VOP_LIT << 16); + state->output_mode = ROCKCHIP_OUT_MODE_P888; + } else { + val = DP_SEL_VOP_LIT << 16; + state->output_mode = ROCKCHIP_OUT_MODE_AAAA; + } + + 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; + } +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); + 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 const struct drm_encoder_funcs cdn_dp_encoder_funcs = { + .destroy = drm_encoder_cleanup, +}; + +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); + struct resource *res; + + 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); + } + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + dp->regs = devm_ioremap_resource(dev, res); + 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_digital_mute(struct device *dev, void *data, + bool enable) +{ + 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 const struct hdmi_codec_ops audio_codec_ops = { + .hw_params = cdn_dp_audio_hw_params, + .audio_shutdown = cdn_dp_audio_shutdown, + .digital_mute = cdn_dp_audio_digital_mute, + .get_eld = cdn_dp_audio_get_eld, +}; + +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->link.rate; + unsigned int lanes = dp->link.num_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->link.rate || lanes != dp->link.num_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; + + INIT_WORK(&dp->event_work, cdn_dp_pd_event_work); + + encoder = &dp->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_encoder_init(drm_dev, encoder, &cdn_dp_encoder_funcs, + DRM_MODE_ENCODER_TMDS, NULL); + 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_mode_connector_attach_encoder(connector, encoder); + if (ret) { + DRM_ERROR("failed to attach connector and encoder\n"); + goto err_free_connector; + } + + cdn_dp_audio_codec_init(dp, dev); + + 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; + struct drm_connector *connector = &dp->connector; + + cancel_work_sync(&dp->event_work); + platform_device_unregister(dp->audio_pdev); + cdn_dp_encoder_disable(encoder); + encoder->funcs->destroy(encoder); + connector->funcs->destroy(connector); + + pm_runtime_disable(dev); + 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, +}; + +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; +} + +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 (!dp) + 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); + + 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); + + 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) +}; + +static 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, + }, +}; + +module_platform_driver(cdn_dp_driver); + +MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>"); +MODULE_DESCRIPTION("cdn DP Driver"); +MODULE_LICENSE("GPL v2"); |