1 files changed, 703 insertions, 0 deletions

diff --git a/drivers/video/fbdev/omap2/dss/hdmi4.c b/drivers/video/fbdev/omap2/dss/hdmi4.c
new file mode 100644
index 000000000000..f5f7944a1fd1
--- /dev/null
+++ b/drivers/video/fbdev/omap2/dss/hdmi4.c
@@ -0,0 +1,703 @@
+/*
+ * HDMI interface DSS driver for TI's OMAP4 family of SoCs.
+ * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com/
+ * Authors: Yong Zhi
+ *      Mythri pk <mythripk@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#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/gpio.h>
+#include <linux/regulator/consumer.h>
+#include <video/omapdss.h>
+
+#include "hdmi4_core.h"
+#include "dss.h"
+#include "dss_features.h"
+
+static struct {
+        struct mutex lock;
+        struct platform_device *pdev;
+
+        struct hdmi_wp_data     wp;
+        struct hdmi_pll_data    pll;
+        struct hdmi_phy_data    phy;
+        struct hdmi_core_data   core;
+
+        struct hdmi_config cfg;
+
+        struct clk *sys_clk;
+        struct regulator *vdda_hdmi_dac_reg;
+
+        bool core_enabled;
+
+        struct omap_dss_device output;
+} hdmi;
+
+static int hdmi_runtime_get(void)
+{
+        int r;
+
+        DSSDBG("hdmi_runtime_get\n");
+
+        r = pm_runtime_get_sync(&hdmi.pdev->dev);
+        WARN_ON(r < 0);
+        if (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 int hdmi_init_regulator(void)
+{
+        struct regulator *reg;
+
+        if (hdmi.vdda_hdmi_dac_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_hdmi_dac_reg = reg;
+
+        return 0;
+}
+
+static int hdmi_power_on_core(struct omap_dss_device *dssdev)
+{
+        int r;
+
+        r = regulator_enable(hdmi.vdda_hdmi_dac_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_hdmi_dac_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_hdmi_dac_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;
+        unsigned long phy;
+
+        r = hdmi_power_on_core(dssdev);
+        if (r)
+                return r;
+
+        p = &hdmi.cfg.timings;
+
+        DSSDBG("hdmi_power_on x_res= %d y_res = %d\n", p->x_res, p->y_res);
+
+        /* the functions below use kHz pixel clock. TODO: change to Hz */
+        phy = p->pixelclock / 1000;
+
+        hdmi_pll_compute(&hdmi.pll, clk_get_rate(hdmi.sys_clk), phy);
+
+        /* config the PLL and PHY hdmi_set_pll_pwrfirst */
+        r = hdmi_pll_enable(&hdmi.pll, &hdmi.wp);
+        if (r) {
+                DSSDBG("Failed to lock PLL\n");
+                goto err_pll_enable;
+        }
+
+        r = hdmi_phy_enable(&hdmi.phy, &hdmi.wp, &hdmi.cfg);
+        if (r) {
+                DSSDBG("Failed to start PHY\n");
+                goto err_phy_enable;
+        }
+
+        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;
+
+        return 0;
+
+err_mgr_enable:
+        hdmi_wp_video_stop(&hdmi.wp);
+err_vid_enable:
+        hdmi_phy_disable(&hdmi.phy, &hdmi.wp);
+err_phy_enable:
+        hdmi_pll_disable(&hdmi.pll, &hdmi.wp);
+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;
+
+        dss_mgr_disable(mgr);
+
+        hdmi_wp_video_stop(&hdmi.wp);
+        hdmi_phy_disable(&hdmi.phy, &hdmi.wp);
+        hdmi_pll_disable(&hdmi.pll, &hdmi.wp);
+
+        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)
+{
+        struct hdmi_cm cm;
+        const struct hdmi_config *t;
+
+        mutex_lock(&hdmi.lock);
+
+        cm = hdmi_get_code(timings);
+        hdmi.cfg.cm = cm;
+
+        t = hdmi_get_timings(cm.mode, cm.code);
+        if (t != NULL) {
+                hdmi.cfg = *t;
+
+                dispc_set_tv_pclk(t->timings.pixelclock);
+        } else {
+                hdmi.cfg.timings = *timings;
+                hdmi.cfg.cm.code = 0;
+                hdmi.cfg.cm.mode = HDMI_DVI;
+
+                dispc_set_tv_pclk(timings->pixelclock);
+        }
+
+        DSSDBG("using mode: %s, code %d\n", hdmi.cfg.cm.mode == HDMI_DVI ?
+                        "DVI" : "HDMI", hdmi.cfg.cm.code);
+
+        mutex_unlock(&hdmi.lock);
+}
+
+static void hdmi_display_get_timings(struct omap_dss_device *dssdev,
+                struct omap_video_timings *timings)
+{
+        const struct hdmi_config *cfg;
+        struct hdmi_cm cm = hdmi.cfg.cm;
+
+        cfg = hdmi_get_timings(cm.mode, cm.code);
+        if (cfg == NULL)
+                cfg = hdmi_default_timing();
+
+        memcpy(timings, &cfg->timings, sizeof(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 int hdmi_display_enable(struct omap_dss_device *dssdev)
+{
+        struct omap_dss_device *out = &hdmi.output;
+        int r = 0;
+
+        DSSDBG("ENTER hdmi_display_enable\n");
+
+        mutex_lock(&hdmi.lock);
+
+        if (out == NULL || 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;
+        }
+
+        mutex_unlock(&hdmi.lock);
+        return 0;
+
+err0:
+        mutex_unlock(&hdmi.lock);
+        return r;
+}
+
+static void hdmi_display_disable(struct omap_dss_device *dssdev)
+{
+        DSSDBG("Enter hdmi_display_disable\n");
+
+        mutex_lock(&hdmi.lock);
+
+        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_get_clocks(struct platform_device *pdev)
+{
+        struct clk *clk;
+
+        clk = devm_clk_get(&pdev->dev, "sys_clk");
+        if (IS_ERR(clk)) {
+                DSSERR("can't get sys_clk\n");
+                return PTR_ERR(clk);
+        }
+
+        hdmi.sys_clk = clk;
+
+        return 0;
+}
+
+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;
+        int r;
+
+        need_enable = hdmi.core_enabled == false;
+
+        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;
+}
+
+#if defined(CONFIG_OMAP4_DSS_HDMI_AUDIO)
+static int hdmi_audio_enable(struct omap_dss_device *dssdev)
+{
+        int r;
+
+        mutex_lock(&hdmi.lock);
+
+        if (!hdmi_mode_has_audio(hdmi.cfg.cm.mode)) {
+                r = -EPERM;
+                goto err;
+        }
+
+        r = hdmi_wp_audio_enable(&hdmi.wp, true);
+        if (r)
+                goto err;
+
+        mutex_unlock(&hdmi.lock);
+        return 0;
+
+err:
+        mutex_unlock(&hdmi.lock);
+        return r;
+}
+
+static void hdmi_audio_disable(struct omap_dss_device *dssdev)
+{
+        hdmi_wp_audio_enable(&hdmi.wp, false);
+}
+
+static int hdmi_audio_start(struct omap_dss_device *dssdev)
+{
+        return hdmi4_audio_start(&hdmi.core, &hdmi.wp);
+}
+
+static void hdmi_audio_stop(struct omap_dss_device *dssdev)
+{
+        hdmi4_audio_stop(&hdmi.core, &hdmi.wp);
+}
+
+static bool hdmi_audio_supported(struct omap_dss_device *dssdev)
+{
+        bool r;
+
+        mutex_lock(&hdmi.lock);
+
+        r = hdmi_mode_has_audio(hdmi.cfg.cm.mode);
+
+        mutex_unlock(&hdmi.lock);
+        return r;
+}
+
+static int hdmi_audio_config(struct omap_dss_device *dssdev,
+                struct omap_dss_audio *audio)
+{
+        int r;
+        u32 pclk = hdmi.cfg.timings.pixelclock;
+
+        mutex_lock(&hdmi.lock);
+
+        if (!hdmi_mode_has_audio(hdmi.cfg.cm.mode)) {
+                r = -EPERM;
+                goto err;
+        }
+
+        r = hdmi4_audio_config(&hdmi.core, &hdmi.wp, audio, pclk);
+        if (r)
+                goto err;
+
+        mutex_unlock(&hdmi.lock);
+        return 0;
+
+err:
+        mutex_unlock(&hdmi.lock);
+        return r;
+}
+#else
+static int hdmi_audio_enable(struct omap_dss_device *dssdev)
+{
+        return -EPERM;
+}
+
+static void hdmi_audio_disable(struct omap_dss_device *dssdev)
+{
+}
+
+static int hdmi_audio_start(struct omap_dss_device *dssdev)
+{
+        return -EPERM;
+}
+
+static void hdmi_audio_stop(struct omap_dss_device *dssdev)
+{
+}
+
+static bool hdmi_audio_supported(struct omap_dss_device *dssdev)
+{
+        return false;
+}
+
+static int hdmi_audio_config(struct omap_dss_device *dssdev,
+                struct omap_dss_audio *audio)
+{
+        return -EPERM;
+}
+#endif
+
+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,
+
+        .audio_enable           = hdmi_audio_enable,
+        .audio_disable          = hdmi_audio_disable,
+        .audio_start            = hdmi_audio_start,
+        .audio_stop             = hdmi_audio_stop,
+        .audio_supported        = hdmi_audio_supported,
+        .audio_config           = hdmi_audio_config,
+};
+
+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 __exit hdmi_uninit_output(struct platform_device *pdev)
+{
+        struct omap_dss_device *out = &hdmi.output;
+
+        omapdss_unregister_output(out);
+}
+
+/* HDMI HW IP initialisation */
+static int omapdss_hdmihw_probe(struct platform_device *pdev)
+{
+        int r;
+
+        hdmi.pdev = pdev;
+
+        mutex_init(&hdmi.lock);
+
+        r = hdmi_wp_init(pdev, &hdmi.wp);
+        if (r)
+                return r;
+
+        r = hdmi_pll_init(pdev, &hdmi.pll);
+        if (r)
+                return r;
+
+        r = hdmi_phy_init(pdev, &hdmi.phy);
+        if (r)
+                return r;
+
+        r = hdmi4_core_init(pdev, &hdmi.core);
+        if (r)
+                return r;
+
+        r = hdmi_get_clocks(pdev);
+        if (r) {
+                DSSERR("can't get clocks\n");
+                return r;
+        }
+
+        pm_runtime_enable(&pdev->dev);
+
+        hdmi_init_output(pdev);
+
+        dss_debugfs_create_file("hdmi", hdmi_dump_regs);
+
+        return 0;
+}
+
+static int __exit omapdss_hdmihw_remove(struct platform_device *pdev)
+{
+        hdmi_uninit_output(pdev);
+
+        pm_runtime_disable(&pdev->dev);
+
+        return 0;
+}
+
+static int hdmi_runtime_suspend(struct device *dev)
+{
+        clk_disable_unprepare(hdmi.sys_clk);
+
+        dispc_runtime_put();
+
+        return 0;
+}
+
+static int hdmi_runtime_resume(struct device *dev)
+{
+        int r;
+
+        r = dispc_runtime_get();
+        if (r < 0)
+                return r;
+
+        clk_prepare_enable(hdmi.sys_clk);
+
+        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          = omapdss_hdmihw_probe,
+        .remove         = __exit_p(omapdss_hdmihw_remove),
+        .driver         = {
+                .name   = "omapdss_hdmi",
+                .owner  = THIS_MODULE,
+                .pm     = &hdmi_pm_ops,
+                .of_match_table = hdmi_of_match,
+        },
+};
+
+int __init hdmi4_init_platform_driver(void)
+{
+        return platform_driver_register(&omapdss_hdmihw_driver);
+}
+
+void __exit hdmi4_uninit_platform_driver(void)
+{
+        platform_driver_unregister(&omapdss_hdmihw_driver);
+}