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path: root/drivers/video/omap2/dss/hdmi_panel.c
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Diffstat (limited to 'drivers/video/omap2/dss/hdmi_panel.c')
-rw-r--r--drivers/video/omap2/dss/hdmi_panel.c256
1 files changed, 256 insertions, 0 deletions
diff --git a/drivers/video/omap2/dss/hdmi_panel.c b/drivers/video/omap2/dss/hdmi_panel.c
new file mode 100644
index 0000000..533d5dc
--- /dev/null
+++ b/drivers/video/omap2/dss/hdmi_panel.c
@@ -0,0 +1,256 @@
+/*
+ * hdmi_panel.c
+ *
+ * HDMI library support functions for TI OMAP4 processors.
+ *
+ * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com/
+ * Authors: Mythri P k <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/>.
+ */
+
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/mutex.h>
+#include <linux/module.h>
+#include <video/omapdss.h>
+#include <linux/slab.h>
+
+#include "dss.h"
+
+static struct {
+ struct mutex hdmi_lock;
+} hdmi;
+
+
+static int hdmi_panel_probe(struct omap_dss_device *dssdev)
+{
+ DSSDBG("ENTER hdmi_panel_probe\n");
+
+ dssdev->panel.config = OMAP_DSS_LCD_TFT |
+ OMAP_DSS_LCD_IVS | OMAP_DSS_LCD_IHS;
+
+ dssdev->panel.timings = (struct omap_video_timings){640, 480, 25175, 96, 16, 48, 2 , 11, 31};
+
+ DSSDBG("hdmi_panel_probe x_res= %d y_res = %d\n",
+ dssdev->panel.timings.x_res,
+ dssdev->panel.timings.y_res);
+ return 0;
+}
+
+static void hdmi_panel_remove(struct omap_dss_device *dssdev)
+{
+
+}
+
+static int hdmi_panel_enable(struct omap_dss_device *dssdev)
+{
+ int r = 0;
+ DSSDBG("ENTER hdmi_panel_enable\n");
+
+ mutex_lock(&hdmi.hdmi_lock);
+
+ if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) {
+ r = -EINVAL;
+ goto err;
+ }
+
+ r = omapdss_hdmi_display_enable(dssdev);
+ if (r) {
+ DSSERR("failed to power on\n");
+ goto err;
+ }
+
+ dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+err:
+ mutex_unlock(&hdmi.hdmi_lock);
+
+ return r;
+}
+
+static void hdmi_panel_disable(struct omap_dss_device *dssdev)
+{
+ mutex_lock(&hdmi.hdmi_lock);
+
+ if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
+ omapdss_hdmi_display_disable(dssdev);
+
+ dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
+
+ mutex_unlock(&hdmi.hdmi_lock);
+}
+
+static int hdmi_panel_suspend(struct omap_dss_device *dssdev)
+{
+ int r = 0;
+
+ mutex_lock(&hdmi.hdmi_lock);
+
+ if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
+ r = -EINVAL;
+ goto err;
+ }
+
+ dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
+
+ omapdss_hdmi_display_disable(dssdev);
+
+err:
+ mutex_unlock(&hdmi.hdmi_lock);
+
+ return r;
+}
+
+static int hdmi_panel_resume(struct omap_dss_device *dssdev)
+{
+ int r = 0;
+
+ mutex_lock(&hdmi.hdmi_lock);
+
+ if (dssdev->state != OMAP_DSS_DISPLAY_SUSPENDED) {
+ r = -EINVAL;
+ goto err;
+ }
+
+ r = omapdss_hdmi_display_enable(dssdev);
+ if (r) {
+ DSSERR("failed to power on\n");
+ goto err;
+ }
+
+ dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+err:
+ mutex_unlock(&hdmi.hdmi_lock);
+
+ return r;
+}
+
+static void hdmi_get_timings(struct omap_dss_device *dssdev,
+ struct omap_video_timings *timings)
+{
+ mutex_lock(&hdmi.hdmi_lock);
+
+ *timings = dssdev->panel.timings;
+
+ mutex_unlock(&hdmi.hdmi_lock);
+}
+
+static void hdmi_set_timings(struct omap_dss_device *dssdev,
+ struct omap_video_timings *timings)
+{
+ DSSDBG("hdmi_set_timings\n");
+
+ mutex_lock(&hdmi.hdmi_lock);
+
+ dssdev->panel.timings = *timings;
+ omapdss_hdmi_display_set_timing(dssdev);
+
+ mutex_unlock(&hdmi.hdmi_lock);
+}
+
+static int hdmi_check_timings(struct omap_dss_device *dssdev,
+ struct omap_video_timings *timings)
+{
+ int r = 0;
+
+ DSSDBG("hdmi_check_timings\n");
+
+ mutex_lock(&hdmi.hdmi_lock);
+
+ r = omapdss_hdmi_display_check_timing(dssdev, timings);
+
+ mutex_unlock(&hdmi.hdmi_lock);
+ return r;
+}
+
+static int hdmi_read_edid(struct omap_dss_device *dssdev, u8 *buf, int len)
+{
+ int r;
+
+ mutex_lock(&hdmi.hdmi_lock);
+
+ if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
+ r = omapdss_hdmi_display_enable(dssdev);
+ if (r)
+ goto err;
+ }
+
+ r = omapdss_hdmi_read_edid(buf, len);
+
+ if (dssdev->state == OMAP_DSS_DISPLAY_DISABLED ||
+ dssdev->state == OMAP_DSS_DISPLAY_SUSPENDED)
+ omapdss_hdmi_display_disable(dssdev);
+err:
+ mutex_unlock(&hdmi.hdmi_lock);
+
+ return r;
+}
+
+static bool hdmi_detect(struct omap_dss_device *dssdev)
+{
+ int r;
+
+ mutex_lock(&hdmi.hdmi_lock);
+
+ if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
+ r = omapdss_hdmi_display_enable(dssdev);
+ if (r)
+ goto err;
+ }
+
+ r = omapdss_hdmi_detect();
+
+ if (dssdev->state == OMAP_DSS_DISPLAY_DISABLED ||
+ dssdev->state == OMAP_DSS_DISPLAY_SUSPENDED)
+ omapdss_hdmi_display_disable(dssdev);
+err:
+ mutex_unlock(&hdmi.hdmi_lock);
+
+ return r;
+}
+
+static struct omap_dss_driver hdmi_driver = {
+ .probe = hdmi_panel_probe,
+ .remove = hdmi_panel_remove,
+ .enable = hdmi_panel_enable,
+ .disable = hdmi_panel_disable,
+ .suspend = hdmi_panel_suspend,
+ .resume = hdmi_panel_resume,
+ .get_timings = hdmi_get_timings,
+ .set_timings = hdmi_set_timings,
+ .check_timings = hdmi_check_timings,
+ .read_edid = hdmi_read_edid,
+ .detect = hdmi_detect,
+ .driver = {
+ .name = "hdmi_panel",
+ .owner = THIS_MODULE,
+ },
+};
+
+int hdmi_panel_init(void)
+{
+ mutex_init(&hdmi.hdmi_lock);
+
+ omap_dss_register_driver(&hdmi_driver);
+
+ return 0;
+}
+
+void hdmi_panel_exit(void)
+{
+ omap_dss_unregister_driver(&hdmi_driver);
+
+}

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