diff options
Diffstat (limited to 'drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c')
| -rw-r--r-- | drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c | 812 |
1 files changed, 812 insertions, 0 deletions
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c b/drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c new file mode 100644 index 000000000..0f39612e0 --- /dev/null +++ b/drivers/video/fbdev/omap2/omapfb/dss/hdmi4.c @@ -0,0 +1,812 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * HDMI interface DSS driver for TI's OMAP4 family of SoCs. + * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com/ + * Authors: Yong Zhi + * Mythri pk <mythripk@ti.com> + */ + +#define DSS_SUBSYS_NAME "HDMI" + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/interrupt.h> +#include <linux/mutex.h> +#include <linux/delay.h> +#include <linux/string.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/clk.h> +#include <linux/of.h> +#include <linux/regulator/consumer.h> +#include <linux/component.h> +#include <video/omapfb_dss.h> +#include <sound/omap-hdmi-audio.h> + +#include "hdmi4_core.h" +#include "dss.h" +#include "dss_features.h" +#include "hdmi.h" + +static struct omap_hdmi hdmi; + +static int hdmi_runtime_get(void) +{ + int r; + + DSSDBG("hdmi_runtime_get\n"); + + r = pm_runtime_resume_and_get(&hdmi.pdev->dev); + if (WARN_ON(r < 0)) + return r; + + return 0; +} + +static void hdmi_runtime_put(void) +{ + int r; + + DSSDBG("hdmi_runtime_put\n"); + + r = pm_runtime_put_sync(&hdmi.pdev->dev); + WARN_ON(r < 0 && r != -ENOSYS); +} + +static irqreturn_t hdmi_irq_handler(int irq, void *data) +{ + struct hdmi_wp_data *wp = data; + u32 irqstatus; + + irqstatus = hdmi_wp_get_irqstatus(wp); + hdmi_wp_set_irqstatus(wp, irqstatus); + + if ((irqstatus & HDMI_IRQ_LINK_CONNECT) && + irqstatus & HDMI_IRQ_LINK_DISCONNECT) { + /* + * If we get both connect and disconnect interrupts at the same + * time, turn off the PHY, clear interrupts, and restart, which + * raises connect interrupt if a cable is connected, or nothing + * if cable is not connected. + */ + hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_OFF); + + hdmi_wp_set_irqstatus(wp, HDMI_IRQ_LINK_CONNECT | + HDMI_IRQ_LINK_DISCONNECT); + + hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON); + } else if (irqstatus & HDMI_IRQ_LINK_CONNECT) { + hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_TXON); + } else if (irqstatus & HDMI_IRQ_LINK_DISCONNECT) { + hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON); + } + + return IRQ_HANDLED; +} + +static int hdmi_init_regulator(void) +{ + struct regulator *reg; + + if (hdmi.vdda_reg != NULL) + return 0; + + reg = devm_regulator_get(&hdmi.pdev->dev, "vdda"); + + if (IS_ERR(reg)) { + if (PTR_ERR(reg) != -EPROBE_DEFER) + DSSERR("can't get VDDA regulator\n"); + return PTR_ERR(reg); + } + + hdmi.vdda_reg = reg; + + return 0; +} + +static int hdmi_power_on_core(struct omap_dss_device *dssdev) +{ + int r; + + r = regulator_enable(hdmi.vdda_reg); + if (r) + return r; + + r = hdmi_runtime_get(); + if (r) + goto err_runtime_get; + + /* Make selection of HDMI in DSS */ + dss_select_hdmi_venc_clk_source(DSS_HDMI_M_PCLK); + + hdmi.core_enabled = true; + + return 0; + +err_runtime_get: + regulator_disable(hdmi.vdda_reg); + + return r; +} + +static void hdmi_power_off_core(struct omap_dss_device *dssdev) +{ + hdmi.core_enabled = false; + + hdmi_runtime_put(); + regulator_disable(hdmi.vdda_reg); +} + +static int hdmi_power_on_full(struct omap_dss_device *dssdev) +{ + int r; + struct omap_video_timings *p; + struct omap_overlay_manager *mgr = hdmi.output.manager; + struct hdmi_wp_data *wp = &hdmi.wp; + struct dss_pll_clock_info hdmi_cinfo = { 0 }; + + r = hdmi_power_on_core(dssdev); + if (r) + return r; + + /* disable and clear irqs */ + hdmi_wp_clear_irqenable(wp, 0xffffffff); + hdmi_wp_set_irqstatus(wp, 0xffffffff); + + p = &hdmi.cfg.timings; + + DSSDBG("hdmi_power_on x_res= %d y_res = %d\n", p->x_res, p->y_res); + + hdmi_pll_compute(&hdmi.pll, p->pixelclock, &hdmi_cinfo); + + r = dss_pll_enable(&hdmi.pll.pll); + if (r) { + DSSERR("Failed to enable PLL\n"); + goto err_pll_enable; + } + + r = dss_pll_set_config(&hdmi.pll.pll, &hdmi_cinfo); + if (r) { + DSSERR("Failed to configure PLL\n"); + goto err_pll_cfg; + } + + r = hdmi_phy_configure(&hdmi.phy, hdmi_cinfo.clkdco, + hdmi_cinfo.clkout[0]); + if (r) { + DSSDBG("Failed to configure PHY\n"); + goto err_phy_cfg; + } + + r = hdmi_wp_set_phy_pwr(wp, HDMI_PHYPWRCMD_LDOON); + if (r) + goto err_phy_pwr; + + hdmi4_configure(&hdmi.core, &hdmi.wp, &hdmi.cfg); + + /* bypass TV gamma table */ + dispc_enable_gamma_table(0); + + /* tv size */ + dss_mgr_set_timings(mgr, p); + + r = hdmi_wp_video_start(&hdmi.wp); + if (r) + goto err_vid_enable; + + r = dss_mgr_enable(mgr); + if (r) + goto err_mgr_enable; + + hdmi_wp_set_irqenable(wp, + HDMI_IRQ_LINK_CONNECT | HDMI_IRQ_LINK_DISCONNECT); + + return 0; + +err_mgr_enable: + hdmi_wp_video_stop(&hdmi.wp); +err_vid_enable: + hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF); +err_phy_pwr: +err_phy_cfg: +err_pll_cfg: + dss_pll_disable(&hdmi.pll.pll); +err_pll_enable: + hdmi_power_off_core(dssdev); + return -EIO; +} + +static void hdmi_power_off_full(struct omap_dss_device *dssdev) +{ + struct omap_overlay_manager *mgr = hdmi.output.manager; + + hdmi_wp_clear_irqenable(&hdmi.wp, 0xffffffff); + + dss_mgr_disable(mgr); + + hdmi_wp_video_stop(&hdmi.wp); + + hdmi_wp_set_phy_pwr(&hdmi.wp, HDMI_PHYPWRCMD_OFF); + + dss_pll_disable(&hdmi.pll.pll); + + hdmi_power_off_core(dssdev); +} + +static int hdmi_display_check_timing(struct omap_dss_device *dssdev, + struct omap_video_timings *timings) +{ + struct omap_dss_device *out = &hdmi.output; + + if (!dispc_mgr_timings_ok(out->dispc_channel, timings)) + return -EINVAL; + + return 0; +} + +static void hdmi_display_set_timing(struct omap_dss_device *dssdev, + struct omap_video_timings *timings) +{ + mutex_lock(&hdmi.lock); + + hdmi.cfg.timings = *timings; + + dispc_set_tv_pclk(timings->pixelclock); + + mutex_unlock(&hdmi.lock); +} + +static void hdmi_display_get_timings(struct omap_dss_device *dssdev, + struct omap_video_timings *timings) +{ + *timings = hdmi.cfg.timings; +} + +static void hdmi_dump_regs(struct seq_file *s) +{ + mutex_lock(&hdmi.lock); + + if (hdmi_runtime_get()) { + mutex_unlock(&hdmi.lock); + return; + } + + hdmi_wp_dump(&hdmi.wp, s); + hdmi_pll_dump(&hdmi.pll, s); + hdmi_phy_dump(&hdmi.phy, s); + hdmi4_core_dump(&hdmi.core, s); + + hdmi_runtime_put(); + mutex_unlock(&hdmi.lock); +} + +static int read_edid(u8 *buf, int len) +{ + int r; + + mutex_lock(&hdmi.lock); + + r = hdmi_runtime_get(); + BUG_ON(r); + + r = hdmi4_read_edid(&hdmi.core, buf, len); + + hdmi_runtime_put(); + mutex_unlock(&hdmi.lock); + + return r; +} + +static void hdmi_start_audio_stream(struct omap_hdmi *hd) +{ + hdmi_wp_audio_enable(&hd->wp, true); + hdmi4_audio_start(&hd->core, &hd->wp); +} + +static void hdmi_stop_audio_stream(struct omap_hdmi *hd) +{ + hdmi4_audio_stop(&hd->core, &hd->wp); + hdmi_wp_audio_enable(&hd->wp, false); +} + +static int hdmi_display_enable(struct omap_dss_device *dssdev) +{ + struct omap_dss_device *out = &hdmi.output; + unsigned long flags; + int r = 0; + + DSSDBG("ENTER hdmi_display_enable\n"); + + mutex_lock(&hdmi.lock); + + if (out->manager == NULL) { + DSSERR("failed to enable display: no output/manager\n"); + r = -ENODEV; + goto err0; + } + + r = hdmi_power_on_full(dssdev); + if (r) { + DSSERR("failed to power on device\n"); + goto err0; + } + + if (hdmi.audio_configured) { + r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, &hdmi.audio_config, + hdmi.cfg.timings.pixelclock); + if (r) { + DSSERR("Error restoring audio configuration: %d", r); + hdmi.audio_abort_cb(&hdmi.pdev->dev); + hdmi.audio_configured = false; + } + } + + spin_lock_irqsave(&hdmi.audio_playing_lock, flags); + if (hdmi.audio_configured && hdmi.audio_playing) + hdmi_start_audio_stream(&hdmi); + hdmi.display_enabled = true; + spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags); + + mutex_unlock(&hdmi.lock); + return 0; + +err0: + mutex_unlock(&hdmi.lock); + return r; +} + +static void hdmi_display_disable(struct omap_dss_device *dssdev) +{ + unsigned long flags; + + DSSDBG("Enter hdmi_display_disable\n"); + + mutex_lock(&hdmi.lock); + + spin_lock_irqsave(&hdmi.audio_playing_lock, flags); + hdmi_stop_audio_stream(&hdmi); + hdmi.display_enabled = false; + spin_unlock_irqrestore(&hdmi.audio_playing_lock, flags); + + hdmi_power_off_full(dssdev); + + mutex_unlock(&hdmi.lock); +} + +static int hdmi_core_enable(struct omap_dss_device *dssdev) +{ + int r = 0; + + DSSDBG("ENTER omapdss_hdmi_core_enable\n"); + + mutex_lock(&hdmi.lock); + + r = hdmi_power_on_core(dssdev); + if (r) { + DSSERR("failed to power on device\n"); + goto err0; + } + + mutex_unlock(&hdmi.lock); + return 0; + +err0: + mutex_unlock(&hdmi.lock); + return r; +} + +static void hdmi_core_disable(struct omap_dss_device *dssdev) +{ + DSSDBG("Enter omapdss_hdmi_core_disable\n"); + + mutex_lock(&hdmi.lock); + + hdmi_power_off_core(dssdev); + + mutex_unlock(&hdmi.lock); +} + +static int hdmi_connect(struct omap_dss_device *dssdev, + struct omap_dss_device *dst) +{ + struct omap_overlay_manager *mgr; + int r; + + r = hdmi_init_regulator(); + if (r) + return r; + + mgr = omap_dss_get_overlay_manager(dssdev->dispc_channel); + if (!mgr) + return -ENODEV; + + r = dss_mgr_connect(mgr, dssdev); + if (r) + return r; + + r = omapdss_output_set_device(dssdev, dst); + if (r) { + DSSERR("failed to connect output to new device: %s\n", + dst->name); + dss_mgr_disconnect(mgr, dssdev); + return r; + } + + return 0; +} + +static void hdmi_disconnect(struct omap_dss_device *dssdev, + struct omap_dss_device *dst) +{ + WARN_ON(dst != dssdev->dst); + + if (dst != dssdev->dst) + return; + + omapdss_output_unset_device(dssdev); + + if (dssdev->manager) + dss_mgr_disconnect(dssdev->manager, dssdev); +} + +static int hdmi_read_edid(struct omap_dss_device *dssdev, + u8 *edid, int len) +{ + bool need_enable = !hdmi.core_enabled; + int r; + + if (need_enable) { + r = hdmi_core_enable(dssdev); + if (r) + return r; + } + + r = read_edid(edid, len); + + if (need_enable) + hdmi_core_disable(dssdev); + + return r; +} + +static int hdmi_set_infoframe(struct omap_dss_device *dssdev, + const struct hdmi_avi_infoframe *avi) +{ + hdmi.cfg.infoframe = *avi; + return 0; +} + +static int hdmi_set_hdmi_mode(struct omap_dss_device *dssdev, + bool hdmi_mode) +{ + hdmi.cfg.hdmi_dvi_mode = hdmi_mode ? HDMI_HDMI : HDMI_DVI; + return 0; +} + +static const struct omapdss_hdmi_ops hdmi_ops = { + .connect = hdmi_connect, + .disconnect = hdmi_disconnect, + + .enable = hdmi_display_enable, + .disable = hdmi_display_disable, + + .check_timings = hdmi_display_check_timing, + .set_timings = hdmi_display_set_timing, + .get_timings = hdmi_display_get_timings, + + .read_edid = hdmi_read_edid, + .set_infoframe = hdmi_set_infoframe, + .set_hdmi_mode = hdmi_set_hdmi_mode, +}; + +static void hdmi_init_output(struct platform_device *pdev) +{ + struct omap_dss_device *out = &hdmi.output; + + out->dev = &pdev->dev; + out->id = OMAP_DSS_OUTPUT_HDMI; + out->output_type = OMAP_DISPLAY_TYPE_HDMI; + out->name = "hdmi.0"; + out->dispc_channel = OMAP_DSS_CHANNEL_DIGIT; + out->ops.hdmi = &hdmi_ops; + out->owner = THIS_MODULE; + + omapdss_register_output(out); +} + +static void hdmi_uninit_output(struct platform_device *pdev) +{ + struct omap_dss_device *out = &hdmi.output; + + omapdss_unregister_output(out); +} + +static int hdmi_probe_of(struct platform_device *pdev) +{ + struct device_node *node = pdev->dev.of_node; + struct device_node *ep; + int r; + + ep = omapdss_of_get_first_endpoint(node); + if (!ep) + return 0; + + r = hdmi_parse_lanes_of(pdev, ep, &hdmi.phy); + if (r) + goto err; + + of_node_put(ep); + return 0; + +err: + of_node_put(ep); + return r; +} + +/* Audio callbacks */ +static int hdmi_audio_startup(struct device *dev, + void (*abort_cb)(struct device *dev)) +{ + struct omap_hdmi *hd = dev_get_drvdata(dev); + int ret = 0; + + mutex_lock(&hd->lock); + + if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) { + ret = -EPERM; + goto out; + } + + hd->audio_abort_cb = abort_cb; + +out: + mutex_unlock(&hd->lock); + + return ret; +} + +static int hdmi_audio_shutdown(struct device *dev) +{ + struct omap_hdmi *hd = dev_get_drvdata(dev); + + mutex_lock(&hd->lock); + hd->audio_abort_cb = NULL; + hd->audio_configured = false; + hd->audio_playing = false; + mutex_unlock(&hd->lock); + + return 0; +} + +static int hdmi_audio_start(struct device *dev) +{ + struct omap_hdmi *hd = dev_get_drvdata(dev); + unsigned long flags; + + WARN_ON(!hdmi_mode_has_audio(&hd->cfg)); + + spin_lock_irqsave(&hd->audio_playing_lock, flags); + + if (hd->display_enabled) + hdmi_start_audio_stream(hd); + hd->audio_playing = true; + + spin_unlock_irqrestore(&hd->audio_playing_lock, flags); + return 0; +} + +static void hdmi_audio_stop(struct device *dev) +{ + struct omap_hdmi *hd = dev_get_drvdata(dev); + unsigned long flags; + + WARN_ON(!hdmi_mode_has_audio(&hd->cfg)); + + spin_lock_irqsave(&hd->audio_playing_lock, flags); + + if (hd->display_enabled) + hdmi_stop_audio_stream(hd); + hd->audio_playing = false; + + spin_unlock_irqrestore(&hd->audio_playing_lock, flags); +} + +static int hdmi_audio_config(struct device *dev, + struct omap_dss_audio *dss_audio) +{ + struct omap_hdmi *hd = dev_get_drvdata(dev); + int ret; + + mutex_lock(&hd->lock); + + if (!hdmi_mode_has_audio(&hd->cfg) || !hd->display_enabled) { + ret = -EPERM; + goto out; + } + + ret = hdmi4_audio_config(&hd->core, &hd->wp, dss_audio, + hd->cfg.timings.pixelclock); + if (!ret) { + hd->audio_configured = true; + hd->audio_config = *dss_audio; + } +out: + mutex_unlock(&hd->lock); + + return ret; +} + +static const struct omap_hdmi_audio_ops hdmi_audio_ops = { + .audio_startup = hdmi_audio_startup, + .audio_shutdown = hdmi_audio_shutdown, + .audio_start = hdmi_audio_start, + .audio_stop = hdmi_audio_stop, + .audio_config = hdmi_audio_config, +}; + +static int hdmi_audio_register(struct device *dev) +{ + struct omap_hdmi_audio_pdata pdata = { + .dev = dev, + .version = 4, + .audio_dma_addr = hdmi_wp_get_audio_dma_addr(&hdmi.wp), + .ops = &hdmi_audio_ops, + }; + + hdmi.audio_pdev = platform_device_register_data( + dev, "omap-hdmi-audio", PLATFORM_DEVID_AUTO, + &pdata, sizeof(pdata)); + + return PTR_ERR_OR_ZERO(hdmi.audio_pdev); +} + +/* HDMI HW IP initialisation */ +static int hdmi4_bind(struct device *dev, struct device *master, void *data) +{ + struct platform_device *pdev = to_platform_device(dev); + int r; + int irq; + + hdmi.pdev = pdev; + platform_set_drvdata(pdev, &hdmi); + + mutex_init(&hdmi.lock); + spin_lock_init(&hdmi.audio_playing_lock); + + if (pdev->dev.of_node) { + r = hdmi_probe_of(pdev); + if (r) + return r; + } + + r = hdmi_wp_init(pdev, &hdmi.wp); + if (r) + return r; + + r = hdmi_pll_init(pdev, &hdmi.pll, &hdmi.wp); + if (r) + return r; + + r = hdmi_phy_init(pdev, &hdmi.phy); + if (r) + goto err; + + r = hdmi4_core_init(pdev, &hdmi.core); + if (r) + goto err; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) { + DSSERR("platform_get_irq failed\n"); + r = -ENODEV; + goto err; + } + + r = devm_request_threaded_irq(&pdev->dev, irq, + NULL, hdmi_irq_handler, + IRQF_ONESHOT, "OMAP HDMI", &hdmi.wp); + if (r) { + DSSERR("HDMI IRQ request failed\n"); + goto err; + } + + pm_runtime_enable(&pdev->dev); + + hdmi_init_output(pdev); + + r = hdmi_audio_register(&pdev->dev); + if (r) { + DSSERR("Registering HDMI audio failed\n"); + hdmi_uninit_output(pdev); + pm_runtime_disable(&pdev->dev); + return r; + } + + dss_debugfs_create_file("hdmi", hdmi_dump_regs); + + return 0; +err: + hdmi_pll_uninit(&hdmi.pll); + return r; +} + +static void hdmi4_unbind(struct device *dev, struct device *master, void *data) +{ + struct platform_device *pdev = to_platform_device(dev); + + if (hdmi.audio_pdev) + platform_device_unregister(hdmi.audio_pdev); + + hdmi_uninit_output(pdev); + + hdmi_pll_uninit(&hdmi.pll); + + pm_runtime_disable(&pdev->dev); +} + +static const struct component_ops hdmi4_component_ops = { + .bind = hdmi4_bind, + .unbind = hdmi4_unbind, +}; + +static int hdmi4_probe(struct platform_device *pdev) +{ + return component_add(&pdev->dev, &hdmi4_component_ops); +} + +static int hdmi4_remove(struct platform_device *pdev) +{ + component_del(&pdev->dev, &hdmi4_component_ops); + return 0; +} + +static int hdmi_runtime_suspend(struct device *dev) +{ + dispc_runtime_put(); + + return 0; +} + +static int hdmi_runtime_resume(struct device *dev) +{ + int r; + + r = dispc_runtime_get(); + if (r < 0) + return r; + + return 0; +} + +static const struct dev_pm_ops hdmi_pm_ops = { + .runtime_suspend = hdmi_runtime_suspend, + .runtime_resume = hdmi_runtime_resume, +}; + +static const struct of_device_id hdmi_of_match[] = { + { .compatible = "ti,omap4-hdmi", }, + {}, +}; + +static struct platform_driver omapdss_hdmihw_driver = { + .probe = hdmi4_probe, + .remove = hdmi4_remove, + .driver = { + .name = "omapdss_hdmi", + .pm = &hdmi_pm_ops, + .of_match_table = hdmi_of_match, + .suppress_bind_attrs = true, + }, +}; + +int __init hdmi4_init_platform_driver(void) +{ + return platform_driver_register(&omapdss_hdmihw_driver); +} + +void hdmi4_uninit_platform_driver(void) +{ + platform_driver_unregister(&omapdss_hdmihw_driver); +} |