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+/*
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+ * hdmi_omap4_panel.c
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+ *
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+ * HDMI library support functions for TI OMAP4 processors.
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+ *
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+ * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com/
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+ * Authors: Mythri P k <mythripk@ti.com>
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+ *
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+ * This program is free software; you can redistribute it and/or modify it
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+ * under the terms of the GNU General Public License version 2 as published by
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+ * the Free Software Foundation.
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+ *
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+ * This program is distributed in the hope that it will be useful, but WITHOUT
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+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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+ * more details.
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+ *
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+ * You should have received a copy of the GNU General Public License along with
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+ * this program. If not, see <http://www.gnu.org/licenses/>.
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+ */
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+
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+#include <linux/kernel.h>
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+#include <linux/err.h>
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+#include <linux/io.h>
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+#include <linux/mutex.h>
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+#include <linux/module.h>
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+#include <plat/display.h>
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+
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+#include "dss.h"
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+
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+static struct {
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+ struct mutex hdmi_lock;
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+} hdmi;
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+
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+
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+static int hdmi_panel_probe(struct omap_dss_device *dssdev)
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+{
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+ DSSDBG("ENTER hdmi_panel_probe\n");
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+
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+ dssdev->panel.config = OMAP_DSS_LCD_TFT |
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+ OMAP_DSS_LCD_IVS | OMAP_DSS_LCD_IHS;
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+
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+ /*
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+ * Initialize the timings to 640 * 480
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+ * This is only for framebuffer update not for TV timing setting
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+ * Setting TV timing will be done only on enable
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+ */
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+ dssdev->panel.timings.x_res = 640;
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+ dssdev->panel.timings.y_res = 480;
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+
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+ DSSDBG("hdmi_panel_probe x_res= %d y_res = %d\n",
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+ dssdev->panel.timings.x_res,
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+ dssdev->panel.timings.y_res);
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+ return 0;
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+}
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+
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+static void hdmi_panel_remove(struct omap_dss_device *dssdev)
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+{
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+
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+}
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+
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+static int hdmi_panel_enable(struct omap_dss_device *dssdev)
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+{
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+ int r = 0;
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+ DSSDBG("ENTER hdmi_panel_enable\n");
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+
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+ mutex_lock(&hdmi.hdmi_lock);
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+
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+ if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) {
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+ r = -EINVAL;
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+ goto err;
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+ }
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+
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+ r = omapdss_hdmi_display_enable(dssdev);
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+ if (r) {
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+ DSSERR("failed to power on\n");
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+ goto err;
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+ }
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+
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+ dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
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+
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+err:
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+ mutex_unlock(&hdmi.hdmi_lock);
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+
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+ return r;
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+}
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+
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+static void hdmi_panel_disable(struct omap_dss_device *dssdev)
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+{
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+ mutex_lock(&hdmi.hdmi_lock);
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+
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+ if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
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+ omapdss_hdmi_display_disable(dssdev);
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+
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+ dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
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+
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+ mutex_unlock(&hdmi.hdmi_lock);
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+}
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+
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+static int hdmi_panel_suspend(struct omap_dss_device *dssdev)
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+{
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+ int r = 0;
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+
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+ mutex_lock(&hdmi.hdmi_lock);
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+
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+ if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
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+ r = -EINVAL;
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+ goto err;
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+ }
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+
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+ dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
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+
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+ omapdss_hdmi_display_disable(dssdev);
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+
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+err:
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+ mutex_unlock(&hdmi.hdmi_lock);
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+
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+ return r;
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+}
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+
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+static int hdmi_panel_resume(struct omap_dss_device *dssdev)
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+{
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+ int r = 0;
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+
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+ mutex_lock(&hdmi.hdmi_lock);
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+
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+ if (dssdev->state != OMAP_DSS_DISPLAY_SUSPENDED) {
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+ r = -EINVAL;
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+ goto err;
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+ }
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+
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+ r = omapdss_hdmi_display_enable(dssdev);
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+ if (r) {
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+ DSSERR("failed to power on\n");
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+ goto err;
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+ }
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+
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+ dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
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+
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+err:
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+ mutex_unlock(&hdmi.hdmi_lock);
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+
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+ return r;
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+}
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+
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+static void hdmi_get_timings(struct omap_dss_device *dssdev,
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+ struct omap_video_timings *timings)
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+{
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+ mutex_lock(&hdmi.hdmi_lock);
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+
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+ *timings = dssdev->panel.timings;
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+
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+ mutex_unlock(&hdmi.hdmi_lock);
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+}
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+
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+static void hdmi_set_timings(struct omap_dss_device *dssdev,
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+ struct omap_video_timings *timings)
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+{
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+ DSSDBG("hdmi_set_timings\n");
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+
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+ mutex_lock(&hdmi.hdmi_lock);
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+
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+ dssdev->panel.timings = *timings;
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+
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+ if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) {
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+ /* turn the hdmi off and on to get new timings to use */
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+ omapdss_hdmi_display_disable(dssdev);
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+ omapdss_hdmi_display_set_timing(dssdev);
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+ }
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+
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+ mutex_unlock(&hdmi.hdmi_lock);
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+}
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+
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+static int hdmi_check_timings(struct omap_dss_device *dssdev,
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+ struct omap_video_timings *timings)
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+{
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+ int r = 0;
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+
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+ DSSDBG("hdmi_check_timings\n");
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+
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+ mutex_lock(&hdmi.hdmi_lock);
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+
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+ r = omapdss_hdmi_display_check_timing(dssdev, timings);
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+ if (r) {
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+ DSSERR("Timing cannot be applied\n");
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+ goto err;
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+ }
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+err:
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+ mutex_unlock(&hdmi.hdmi_lock);
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+ return r;
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+}
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+
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+static struct omap_dss_driver hdmi_driver = {
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+ .probe = hdmi_panel_probe,
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+ .remove = hdmi_panel_remove,
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+ .enable = hdmi_panel_enable,
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+ .disable = hdmi_panel_disable,
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+ .suspend = hdmi_panel_suspend,
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+ .resume = hdmi_panel_resume,
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+ .get_timings = hdmi_get_timings,
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+ .set_timings = hdmi_set_timings,
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+ .check_timings = hdmi_check_timings,
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+ .driver = {
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+ .name = "hdmi_panel",
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+ .owner = THIS_MODULE,
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+ },
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+};
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+
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+int hdmi_panel_init(void)
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+{
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+ mutex_init(&hdmi.hdmi_lock);
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+
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+ omap_dss_register_driver(&hdmi_driver);
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+
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+ return 0;
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+}
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+
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+void hdmi_panel_exit(void)
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+{
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+ omap_dss_unregister_driver(&hdmi_driver);
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+
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+}
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