diff options
Diffstat (limited to 'drivers/gpu/drm/msm/hdmi/hdmi.c')
| -rw-r--r-- | drivers/gpu/drm/msm/hdmi/hdmi.c | 614 |
1 files changed, 614 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c new file mode 100644 index 000000000..333cedc11 --- /dev/null +++ b/drivers/gpu/drm/msm/hdmi/hdmi.c @@ -0,0 +1,614 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2014 The Linux Foundation. All rights reserved. + * Copyright (C) 2013 Red Hat + * Author: Rob Clark <robdclark@gmail.com> + */ + +#include <linux/of_irq.h> +#include <linux/of_gpio.h> + +#include <drm/drm_bridge_connector.h> +#include <drm/drm_of.h> + +#include <sound/hdmi-codec.h> +#include "hdmi.h" + +void msm_hdmi_set_mode(struct hdmi *hdmi, bool power_on) +{ + uint32_t ctrl = 0; + unsigned long flags; + + spin_lock_irqsave(&hdmi->reg_lock, flags); + if (power_on) { + ctrl |= HDMI_CTRL_ENABLE; + if (!hdmi->hdmi_mode) { + ctrl |= HDMI_CTRL_HDMI; + hdmi_write(hdmi, REG_HDMI_CTRL, ctrl); + ctrl &= ~HDMI_CTRL_HDMI; + } else { + ctrl |= HDMI_CTRL_HDMI; + } + } else { + ctrl = HDMI_CTRL_HDMI; + } + + hdmi_write(hdmi, REG_HDMI_CTRL, ctrl); + spin_unlock_irqrestore(&hdmi->reg_lock, flags); + DBG("HDMI Core: %s, HDMI_CTRL=0x%08x", + power_on ? "Enable" : "Disable", ctrl); +} + +static irqreturn_t msm_hdmi_irq(int irq, void *dev_id) +{ + struct hdmi *hdmi = dev_id; + + /* Process HPD: */ + msm_hdmi_hpd_irq(hdmi->bridge); + + /* Process DDC: */ + msm_hdmi_i2c_irq(hdmi->i2c); + + /* Process HDCP: */ + if (hdmi->hdcp_ctrl) + msm_hdmi_hdcp_irq(hdmi->hdcp_ctrl); + + /* TODO audio.. */ + + return IRQ_HANDLED; +} + +static void msm_hdmi_destroy(struct hdmi *hdmi) +{ + /* + * at this point, hpd has been disabled, + * after flush workq, it's safe to deinit hdcp + */ + if (hdmi->workq) + destroy_workqueue(hdmi->workq); + msm_hdmi_hdcp_destroy(hdmi); + + if (hdmi->phy_dev) { + put_device(hdmi->phy_dev); + hdmi->phy = NULL; + hdmi->phy_dev = NULL; + } + + if (hdmi->i2c) + msm_hdmi_i2c_destroy(hdmi->i2c); + + platform_set_drvdata(hdmi->pdev, NULL); +} + +static int msm_hdmi_get_phy(struct hdmi *hdmi) +{ + struct platform_device *pdev = hdmi->pdev; + struct platform_device *phy_pdev; + struct device_node *phy_node; + + phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0); + if (!phy_node) { + DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n"); + return -ENXIO; + } + + phy_pdev = of_find_device_by_node(phy_node); + if (phy_pdev) + hdmi->phy = platform_get_drvdata(phy_pdev); + + of_node_put(phy_node); + + if (!phy_pdev) { + DRM_DEV_ERROR(&pdev->dev, "phy driver is not ready\n"); + return -EPROBE_DEFER; + } + if (!hdmi->phy) { + DRM_DEV_ERROR(&pdev->dev, "phy driver is not ready\n"); + put_device(&phy_pdev->dev); + return -EPROBE_DEFER; + } + + hdmi->phy_dev = get_device(&phy_pdev->dev); + + return 0; +} + +/* construct hdmi at bind/probe time, grab all the resources. If + * we are to EPROBE_DEFER we want to do it here, rather than later + * at modeset_init() time + */ +static struct hdmi *msm_hdmi_init(struct platform_device *pdev) +{ + struct hdmi_platform_config *config = pdev->dev.platform_data; + struct hdmi *hdmi = NULL; + struct resource *res; + int i, ret; + + hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL); + if (!hdmi) { + ret = -ENOMEM; + goto fail; + } + + hdmi->pdev = pdev; + hdmi->config = config; + spin_lock_init(&hdmi->reg_lock); + + ret = drm_of_find_panel_or_bridge(pdev->dev.of_node, 1, 0, NULL, &hdmi->next_bridge); + if (ret && ret != -ENODEV) + goto fail; + + hdmi->mmio = msm_ioremap(pdev, config->mmio_name); + if (IS_ERR(hdmi->mmio)) { + ret = PTR_ERR(hdmi->mmio); + goto fail; + } + + /* HDCP needs physical address of hdmi register */ + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + config->mmio_name); + if (!res) { + ret = -EINVAL; + goto fail; + } + hdmi->mmio_phy_addr = res->start; + + hdmi->qfprom_mmio = msm_ioremap(pdev, config->qfprom_mmio_name); + if (IS_ERR(hdmi->qfprom_mmio)) { + DRM_DEV_INFO(&pdev->dev, "can't find qfprom resource\n"); + hdmi->qfprom_mmio = NULL; + } + + hdmi->hpd_regs = devm_kcalloc(&pdev->dev, + config->hpd_reg_cnt, + sizeof(hdmi->hpd_regs[0]), + GFP_KERNEL); + if (!hdmi->hpd_regs) { + ret = -ENOMEM; + goto fail; + } + for (i = 0; i < config->hpd_reg_cnt; i++) + hdmi->hpd_regs[i].supply = config->hpd_reg_names[i]; + + ret = devm_regulator_bulk_get(&pdev->dev, config->hpd_reg_cnt, hdmi->hpd_regs); + if (ret) { + DRM_DEV_ERROR(&pdev->dev, "failed to get hpd regulator: %d\n", ret); + goto fail; + } + + hdmi->pwr_regs = devm_kcalloc(&pdev->dev, + config->pwr_reg_cnt, + sizeof(hdmi->pwr_regs[0]), + GFP_KERNEL); + if (!hdmi->pwr_regs) { + ret = -ENOMEM; + goto fail; + } + + for (i = 0; i < config->pwr_reg_cnt; i++) + hdmi->pwr_regs[i].supply = config->pwr_reg_names[i]; + + ret = devm_regulator_bulk_get(&pdev->dev, config->pwr_reg_cnt, hdmi->pwr_regs); + if (ret) { + DRM_DEV_ERROR(&pdev->dev, "failed to get pwr regulator: %d\n", ret); + goto fail; + } + + hdmi->hpd_clks = devm_kcalloc(&pdev->dev, + config->hpd_clk_cnt, + sizeof(hdmi->hpd_clks[0]), + GFP_KERNEL); + if (!hdmi->hpd_clks) { + ret = -ENOMEM; + goto fail; + } + for (i = 0; i < config->hpd_clk_cnt; i++) { + struct clk *clk; + + clk = msm_clk_get(pdev, config->hpd_clk_names[i]); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + DRM_DEV_ERROR(&pdev->dev, "failed to get hpd clk: %s (%d)\n", + config->hpd_clk_names[i], ret); + goto fail; + } + + hdmi->hpd_clks[i] = clk; + } + + hdmi->pwr_clks = devm_kcalloc(&pdev->dev, + config->pwr_clk_cnt, + sizeof(hdmi->pwr_clks[0]), + GFP_KERNEL); + if (!hdmi->pwr_clks) { + ret = -ENOMEM; + goto fail; + } + for (i = 0; i < config->pwr_clk_cnt; i++) { + struct clk *clk; + + clk = msm_clk_get(pdev, config->pwr_clk_names[i]); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + DRM_DEV_ERROR(&pdev->dev, "failed to get pwr clk: %s (%d)\n", + config->pwr_clk_names[i], ret); + goto fail; + } + + hdmi->pwr_clks[i] = clk; + } + + hdmi->hpd_gpiod = devm_gpiod_get_optional(&pdev->dev, "hpd", GPIOD_IN); + /* This will catch e.g. -EPROBE_DEFER */ + if (IS_ERR(hdmi->hpd_gpiod)) { + ret = PTR_ERR(hdmi->hpd_gpiod); + DRM_DEV_ERROR(&pdev->dev, "failed to get hpd gpio: (%d)\n", ret); + goto fail; + } + + if (!hdmi->hpd_gpiod) + DBG("failed to get HPD gpio"); + + if (hdmi->hpd_gpiod) + gpiod_set_consumer_name(hdmi->hpd_gpiod, "HDMI_HPD"); + + devm_pm_runtime_enable(&pdev->dev); + + hdmi->workq = alloc_ordered_workqueue("msm_hdmi", 0); + if (!hdmi->workq) { + ret = -ENOMEM; + goto fail; + } + + hdmi->i2c = msm_hdmi_i2c_init(hdmi); + if (IS_ERR(hdmi->i2c)) { + ret = PTR_ERR(hdmi->i2c); + DRM_DEV_ERROR(&pdev->dev, "failed to get i2c: %d\n", ret); + hdmi->i2c = NULL; + goto fail; + } + + ret = msm_hdmi_get_phy(hdmi); + if (ret) { + DRM_DEV_ERROR(&pdev->dev, "failed to get phy\n"); + goto fail; + } + + hdmi->hdcp_ctrl = msm_hdmi_hdcp_init(hdmi); + if (IS_ERR(hdmi->hdcp_ctrl)) { + dev_warn(&pdev->dev, "failed to init hdcp: disabled\n"); + hdmi->hdcp_ctrl = NULL; + } + + return hdmi; + +fail: + if (hdmi) + msm_hdmi_destroy(hdmi); + + return ERR_PTR(ret); +} + +/* Second part of initialization, the drm/kms level modeset_init, + * constructs/initializes mode objects, etc, is called from master + * driver (not hdmi sub-device's probe/bind!) + * + * Any resource (regulator/clk/etc) which could be missing at boot + * should be handled in msm_hdmi_init() so that failure happens from + * hdmi sub-device's probe. + */ +int msm_hdmi_modeset_init(struct hdmi *hdmi, + struct drm_device *dev, struct drm_encoder *encoder) +{ + struct msm_drm_private *priv = dev->dev_private; + struct platform_device *pdev = hdmi->pdev; + int ret; + + if (priv->num_bridges == ARRAY_SIZE(priv->bridges)) { + DRM_DEV_ERROR(dev->dev, "too many bridges\n"); + return -ENOSPC; + } + + hdmi->dev = dev; + hdmi->encoder = encoder; + + hdmi_audio_infoframe_init(&hdmi->audio.infoframe); + + hdmi->bridge = msm_hdmi_bridge_init(hdmi); + if (IS_ERR(hdmi->bridge)) { + ret = PTR_ERR(hdmi->bridge); + DRM_DEV_ERROR(dev->dev, "failed to create HDMI bridge: %d\n", ret); + hdmi->bridge = NULL; + goto fail; + } + + if (hdmi->next_bridge) { + ret = drm_bridge_attach(hdmi->encoder, hdmi->next_bridge, hdmi->bridge, + DRM_BRIDGE_ATTACH_NO_CONNECTOR); + if (ret) { + DRM_DEV_ERROR(dev->dev, "failed to attach next HDMI bridge: %d\n", ret); + goto fail; + } + } + + hdmi->connector = drm_bridge_connector_init(hdmi->dev, encoder); + if (IS_ERR(hdmi->connector)) { + ret = PTR_ERR(hdmi->connector); + DRM_DEV_ERROR(dev->dev, "failed to create HDMI connector: %d\n", ret); + hdmi->connector = NULL; + goto fail; + } + + drm_connector_attach_encoder(hdmi->connector, hdmi->encoder); + + hdmi->irq = irq_of_parse_and_map(pdev->dev.of_node, 0); + if (!hdmi->irq) { + ret = -EINVAL; + DRM_DEV_ERROR(dev->dev, "failed to get irq\n"); + goto fail; + } + + ret = devm_request_irq(dev->dev, hdmi->irq, + msm_hdmi_irq, IRQF_TRIGGER_HIGH, + "hdmi_isr", hdmi); + if (ret < 0) { + DRM_DEV_ERROR(dev->dev, "failed to request IRQ%u: %d\n", + hdmi->irq, ret); + goto fail; + } + + drm_bridge_connector_enable_hpd(hdmi->connector); + + ret = msm_hdmi_hpd_enable(hdmi->bridge); + if (ret < 0) { + DRM_DEV_ERROR(&hdmi->pdev->dev, "failed to enable HPD: %d\n", ret); + goto fail; + } + + priv->bridges[priv->num_bridges++] = hdmi->bridge; + + platform_set_drvdata(pdev, hdmi); + + return 0; + +fail: + /* bridge is normally destroyed by drm: */ + if (hdmi->bridge) { + msm_hdmi_bridge_destroy(hdmi->bridge); + hdmi->bridge = NULL; + } + if (hdmi->connector) { + hdmi->connector->funcs->destroy(hdmi->connector); + hdmi->connector = NULL; + } + + return ret; +} + +/* + * The hdmi device: + */ + +#define HDMI_CFG(item, entry) \ + .item ## _names = item ##_names_ ## entry, \ + .item ## _cnt = ARRAY_SIZE(item ## _names_ ## entry) + +static const char *hpd_reg_names_8960[] = {"core-vdda"}; +static const char *hpd_clk_names_8960[] = {"core", "master_iface", "slave_iface"}; + +static struct hdmi_platform_config hdmi_tx_8960_config = { + HDMI_CFG(hpd_reg, 8960), + HDMI_CFG(hpd_clk, 8960), +}; + +static const char *pwr_reg_names_8x74[] = {"core-vdda", "core-vcc"}; +static const char *pwr_clk_names_8x74[] = {"extp", "alt_iface"}; +static const char *hpd_clk_names_8x74[] = {"iface", "core", "mdp_core"}; +static unsigned long hpd_clk_freq_8x74[] = {0, 19200000, 0}; + +static struct hdmi_platform_config hdmi_tx_8974_config = { + HDMI_CFG(pwr_reg, 8x74), + HDMI_CFG(pwr_clk, 8x74), + HDMI_CFG(hpd_clk, 8x74), + .hpd_freq = hpd_clk_freq_8x74, +}; + +/* + * HDMI audio codec callbacks + */ +static int msm_hdmi_audio_hw_params(struct device *dev, void *data, + struct hdmi_codec_daifmt *daifmt, + struct hdmi_codec_params *params) +{ + struct hdmi *hdmi = dev_get_drvdata(dev); + unsigned int chan; + unsigned int channel_allocation = 0; + unsigned int rate; + unsigned int level_shift = 0; /* 0dB */ + bool down_mix = false; + + DRM_DEV_DEBUG(dev, "%u Hz, %d bit, %d channels\n", params->sample_rate, + params->sample_width, params->cea.channels); + + switch (params->cea.channels) { + case 2: + /* FR and FL speakers */ + channel_allocation = 0; + chan = MSM_HDMI_AUDIO_CHANNEL_2; + break; + case 4: + /* FC, LFE, FR and FL speakers */ + channel_allocation = 0x3; + chan = MSM_HDMI_AUDIO_CHANNEL_4; + break; + case 6: + /* RR, RL, FC, LFE, FR and FL speakers */ + channel_allocation = 0x0B; + chan = MSM_HDMI_AUDIO_CHANNEL_6; + break; + case 8: + /* FRC, FLC, RR, RL, FC, LFE, FR and FL speakers */ + channel_allocation = 0x1F; + chan = MSM_HDMI_AUDIO_CHANNEL_8; + break; + default: + return -EINVAL; + } + + switch (params->sample_rate) { + case 32000: + rate = HDMI_SAMPLE_RATE_32KHZ; + break; + case 44100: + rate = HDMI_SAMPLE_RATE_44_1KHZ; + break; + case 48000: + rate = HDMI_SAMPLE_RATE_48KHZ; + break; + case 88200: + rate = HDMI_SAMPLE_RATE_88_2KHZ; + break; + case 96000: + rate = HDMI_SAMPLE_RATE_96KHZ; + break; + case 176400: + rate = HDMI_SAMPLE_RATE_176_4KHZ; + break; + case 192000: + rate = HDMI_SAMPLE_RATE_192KHZ; + break; + default: + DRM_DEV_ERROR(dev, "rate[%d] not supported!\n", + params->sample_rate); + return -EINVAL; + } + + msm_hdmi_audio_set_sample_rate(hdmi, rate); + msm_hdmi_audio_info_setup(hdmi, 1, chan, channel_allocation, + level_shift, down_mix); + + return 0; +} + +static void msm_hdmi_audio_shutdown(struct device *dev, void *data) +{ + struct hdmi *hdmi = dev_get_drvdata(dev); + + msm_hdmi_audio_info_setup(hdmi, 0, 0, 0, 0, 0); +} + +static const struct hdmi_codec_ops msm_hdmi_audio_codec_ops = { + .hw_params = msm_hdmi_audio_hw_params, + .audio_shutdown = msm_hdmi_audio_shutdown, +}; + +static struct hdmi_codec_pdata codec_data = { + .ops = &msm_hdmi_audio_codec_ops, + .max_i2s_channels = 8, + .i2s = 1, +}; + +static int msm_hdmi_register_audio_driver(struct hdmi *hdmi, struct device *dev) +{ + hdmi->audio_pdev = platform_device_register_data(dev, + HDMI_CODEC_DRV_NAME, + PLATFORM_DEVID_AUTO, + &codec_data, + sizeof(codec_data)); + return PTR_ERR_OR_ZERO(hdmi->audio_pdev); +} + +static int msm_hdmi_bind(struct device *dev, struct device *master, void *data) +{ + struct msm_drm_private *priv = dev_get_drvdata(master); + struct hdmi_platform_config *hdmi_cfg; + struct hdmi *hdmi; + struct device_node *of_node = dev->of_node; + int err; + + hdmi_cfg = (struct hdmi_platform_config *) + of_device_get_match_data(dev); + if (!hdmi_cfg) { + DRM_DEV_ERROR(dev, "unknown hdmi_cfg: %pOFn\n", of_node); + return -ENXIO; + } + + hdmi_cfg->mmio_name = "core_physical"; + hdmi_cfg->qfprom_mmio_name = "qfprom_physical"; + + dev->platform_data = hdmi_cfg; + + hdmi = msm_hdmi_init(to_platform_device(dev)); + if (IS_ERR(hdmi)) + return PTR_ERR(hdmi); + priv->hdmi = hdmi; + + err = msm_hdmi_register_audio_driver(hdmi, dev); + if (err) { + DRM_ERROR("Failed to attach an audio codec %d\n", err); + hdmi->audio_pdev = NULL; + } + + return 0; +} + +static void msm_hdmi_unbind(struct device *dev, struct device *master, + void *data) +{ + struct msm_drm_private *priv = dev_get_drvdata(master); + + if (priv->hdmi) { + if (priv->hdmi->audio_pdev) + platform_device_unregister(priv->hdmi->audio_pdev); + + msm_hdmi_destroy(priv->hdmi); + priv->hdmi = NULL; + } +} + +static const struct component_ops msm_hdmi_ops = { + .bind = msm_hdmi_bind, + .unbind = msm_hdmi_unbind, +}; + +static int msm_hdmi_dev_probe(struct platform_device *pdev) +{ + return component_add(&pdev->dev, &msm_hdmi_ops); +} + +static int msm_hdmi_dev_remove(struct platform_device *pdev) +{ + component_del(&pdev->dev, &msm_hdmi_ops); + return 0; +} + +static const struct of_device_id msm_hdmi_dt_match[] = { + { .compatible = "qcom,hdmi-tx-8996", .data = &hdmi_tx_8974_config }, + { .compatible = "qcom,hdmi-tx-8994", .data = &hdmi_tx_8974_config }, + { .compatible = "qcom,hdmi-tx-8084", .data = &hdmi_tx_8974_config }, + { .compatible = "qcom,hdmi-tx-8974", .data = &hdmi_tx_8974_config }, + { .compatible = "qcom,hdmi-tx-8960", .data = &hdmi_tx_8960_config }, + { .compatible = "qcom,hdmi-tx-8660", .data = &hdmi_tx_8960_config }, + {} +}; + +static struct platform_driver msm_hdmi_driver = { + .probe = msm_hdmi_dev_probe, + .remove = msm_hdmi_dev_remove, + .driver = { + .name = "hdmi_msm", + .of_match_table = msm_hdmi_dt_match, + }, +}; + +void __init msm_hdmi_register(void) +{ + msm_hdmi_phy_driver_register(); + platform_driver_register(&msm_hdmi_driver); +} + +void __exit msm_hdmi_unregister(void) +{ + platform_driver_unregister(&msm_hdmi_driver); + msm_hdmi_phy_driver_unregister(); +} |