[PATCH 3/7] OMAP: DSS: Adding a picodlp panel driver

Mayuresh Janorkar
2011-04-18T05:59:11Z

From: Mythri P K <mythripk@ti.com>

A projector panel named picodlp is supported by OMAP.
panel driver is required to be added with the name picodlp_panel.

It is a WVGA panel with resolution 864 X 480 and panel timing data
is defined in the panel driver.

picodlp makes use of parallel (DPI) interface multiplexed with secondary lcd
in case of OMAP4.

Signed-off-by: Mythri P K <mythripk@ti.com>
Signed-off-by: Mayuresh Janorkar <mayur@ti.com>
---
drivers/video/omap2/displays/panel-picodlp.c | 228 ++++++++++++++++++++++++++
1 files changed, 228 insertions(+), 0 deletions(-)
create mode 100644 drivers/video/omap2/displays/panel-picodlp.c

diff --git a/drivers/video/omap2/displays/panel-picodlp.c b/drivers/video/omap2/displays/panel-picodlp.c
new file mode 100644
index 0000000..4f12903
--- /dev/null
+++ b/drivers/video/omap2/displays/panel-picodlp.c
@@ -0,0 +1,228 @@
+/*
+ * picodlp panel driver
+ *
+ * Copyright (C) 2009-2011 Texas Instruments
+ * Author: 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/input.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/firmware.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+
+#include <plat/display.h>
+#include <plat/panel-picodlp.h>
+
+struct picodlp_data {
+ struct mutex lock;
+};
+
+static struct omap_video_timings pico_ls_timings = {
+ .x_res = 864,
+ .y_res = 480,
+ .hsw = 7,
+ .hfp = 11,
+ .hbp = 7,
+
+ .pixel_clock = 19200,
+
+ .vsw = 2,
+ .vfp = 3,
+ .vbp = 14,
+};
+
+static int picodlp_panel_power_on(struct omap_dss_device *dssdev)
+{
+ int r;
+
+ if (dssdev->platform_enable) {
+ r = dssdev->platform_enable(dssdev);
+ if (r)
+ return r;
+ }
+
+ r = omapdss_dpi_display_enable(dssdev);
+ if (r) {
+ dev_err(&dssdev->dev, "failed to enable DPI\n");
+ goto err;
+ }
+ /* after enabling, wait for some initialize sync interrupts */
+ msleep(675);
+ dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+ return 0;
+
+err:
+ if (dssdev->platform_disable)
+ dssdev->platform_disable(dssdev);
+
+ return r;
+}
+
+static void picodlp_panel_power_off(struct omap_dss_device *dssdev)
+{
+ omapdss_dpi_display_disable(dssdev);
+
+ if (dssdev->platform_disable)
+ dssdev->platform_disable(dssdev);
+}
+
+static int picodlp_panel_probe(struct omap_dss_device *dssdev)
+{
+ struct picodlp_data *picod;
+
+ dssdev->panel.config = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_ONOFF |
+ OMAP_DSS_LCD_IHS | OMAP_DSS_LCD_IVS;
+ dssdev->panel.acb = 0x0;
+ dssdev->panel.timings = pico_ls_timings;
+
+ picod = kzalloc(sizeof(struct picodlp_data), GFP_KERNEL);
+ if (!picod)
+ return -ENOMEM;
+
+ mutex_init(&picod->lock);
+ dev_set_drvdata(&dssdev->dev, picod);
+ return 0;
+}
+
+static void picodlp_panel_remove(struct omap_dss_device *dssdev)
+{
+ struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
+
+ dev_set_drvdata(&dssdev->dev, NULL);
+ dev_dbg(&dssdev->dev, " removing picodlp panel\n");
+ kfree(picod);
+}
+
+static int picodlp_panel_enable(struct omap_dss_device *dssdev)
+{
+ struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
+ int r;
+
+ dev_dbg(&dssdev->dev, "enabling picodlp panel\n");
+
+ mutex_lock(&picod->lock);
+ if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED) {
+ mutex_unlock(&picod->lock);
+ return -EINVAL;
+ }
+
+ r = picodlp_panel_power_on(dssdev);
+ mutex_unlock(&picod->lock);
+
+ return r;
+}
+
+static void picodlp_panel_disable(struct omap_dss_device *dssdev)
+{
+ struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
+
+ mutex_lock(&picod->lock);
+ /* Turn off DLP Power */
+ if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
+ picodlp_panel_power_off(dssdev);
+
+ dev_dbg(&dssdev->dev, " disabling picodlp panel\n");
+ dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
+
+ mutex_unlock(&picod->lock);
+}
+
+static int picodlp_panel_suspend(struct omap_dss_device *dssdev)
+{
+ struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
+
+ mutex_lock(&picod->lock);
+ /* Turn off DLP Power */
+ if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE) {
+ dev_dbg(&dssdev->dev, " unable to suspend picodlp panel,"\
+ " panel is not ACTIVE\n");
+ mutex_unlock(&picod->lock);
+ return -EINVAL;
+ }
+
+ picodlp_panel_power_off(dssdev);
+
+ dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
+ dev_dbg(&dssdev->dev, " suspending picodlp panel\n");
+
+ mutex_unlock(&picod->lock);
+ return 0;
+}
+
+static int picodlp_panel_resume(struct omap_dss_device *dssdev)
+{
+ struct picodlp_data *picod = dev_get_drvdata(&dssdev->dev);
+ int r;
+
+ mutex_lock(&picod->lock);
+ if (dssdev->state != OMAP_DSS_DISPLAY_SUSPENDED) {
+ dev_dbg(&dssdev->dev, " unable to resume picodlp panel,"
+ " panel is not ACTIVE\n");
+ mutex_unlock(&picod->lock);
+ return -EINVAL;
+ }
+
+ dev_dbg(&dssdev->dev, " resuming picodlp panel\n");
+ r = picodlp_panel_power_on(dssdev);
+ mutex_unlock(&picod->lock);
+
+ return r;
+}
+
+static void picodlp_get_resolution(struct omap_dss_device *dssdev,
+ u16 *xres, u16 *yres)
+{
+ *xres = dssdev->panel.timings.x_res;
+ *yres = dssdev->panel.timings.y_res;
+}
+
+static struct omap_dss_driver picodlp_driver = {
+ .probe = picodlp_panel_probe,
+ .remove = picodlp_panel_remove,
+
+ .enable = picodlp_panel_enable,
+ .disable = picodlp_panel_disable,
+
+ .get_resolution = picodlp_get_resolution,
+
+ .suspend = picodlp_panel_suspend,
+ .resume = picodlp_panel_resume,
+
+ .driver = {
+ .name = "picodlp_panel",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init picodlp_init(void)
+{
+ return omap_dss_register_driver(&picodlp_driver);
+}
+
+static void __exit picodlp_exit(void)
+{
+ omap_dss_unregister_driver(&picodlp_driver);
+}
+
+module_init(picodlp_init);
+module_exit(picodlp_exit);
+
+MODULE_AUTHOR("Mythri P K <mythripk@ti.com>");
+MODULE_DESCRIPTION("picodlp driver");
+MODULE_LICENSE("GPL");
--
1.7.1