OMAP: DSS2: Add generic DPI panel display driver

Generic DPI panel driver includes the driver and 4 similar panel configurations. It
will match the panel name which is passed from platform data and setup the
right configurations.

With generic DPI panel driver, we can remove those 4 duplicated panel display
drivers. In the future, it is simple for us just add new panel configuration
date in panel-generic-dpi.c to support new display panel.

Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
Acked-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>

3 files changed, 364 insertions, 0 deletions

diff --git a/drivers/video/omap2/displays/Kconfig b/drivers/video/omap2/displays/Kconfig
index f8152cfedb5f..6d921969e731 100644
--- a/drivers/video/omap2/displays/Kconfig
+++ b/drivers/video/omap2/displays/Kconfig
@@ -1,6 +1,14 @@
 menu "OMAP2/3 Display Device Drivers"
         depends on OMAP2_DSS
 
+config PANEL_GENERIC_DPI
+        tristate "Generic DPI Panel"
+        help
+          Generic DPI panel driver.
+          Supports DVI output for Beagle and OMAP3 SDP.
+          Supports LCD Panel used in TI SDP3430 and EVM boards,
+          OMAP3517 EVM boards and CM-T35.
+
 config PANEL_GENERIC
         tristate "Generic Panel"
         help
diff --git a/drivers/video/omap2/displays/Makefile b/drivers/video/omap2/displays/Makefile
index 8ece91cfe177..48f9c88af0c7 100644
--- a/drivers/video/omap2/displays/Makefile
+++ b/drivers/video/omap2/displays/Makefile
@@ -1,3 +1,4 @@
+obj-$(CONFIG_PANEL_GENERIC_DPI) += panel-generic-dpi.o
 obj-$(CONFIG_PANEL_GENERIC) += panel-generic.o
 obj-$(CONFIG_PANEL_SHARP_LS037V7DW01) += panel-sharp-ls037v7dw01.o
 obj-$(CONFIG_PANEL_SHARP_LQ043T1DG01) += panel-sharp-lq043t1dg01.o
diff --git a/drivers/video/omap2/displays/panel-generic-dpi.c b/drivers/video/omap2/displays/panel-generic-dpi.c
new file mode 100644
index 000000000000..6702cf6d0a57
--- /dev/null
+++ b/drivers/video/omap2/displays/panel-generic-dpi.c
@@ -0,0 +1,355 @@
+/*
+ * Generic DPI Panels support
+ *
+ * Copyright (C) 2010 Canonical Ltd.
+ * Author: Bryan Wu <bryan.wu@canonical.com>
+ *
+ * Copyright (C) 2008 Nokia Corporation
+ * Author: Tomi Valkeinen <tomi.valkeinen@nokia.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/module.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+
+#include <plat/panel-generic-dpi.h>
+
+struct panel_config {
+        struct omap_video_timings timings;
+
+        int acbi;       /* ac-bias pin transitions per interrupt */
+        /* Unit: line clocks */
+        int acb;        /* ac-bias pin frequency */
+
+        enum omap_panel_config config;
+
+        int power_on_delay;
+        int power_off_delay;
+
+        /*
+         * Used to match device to panel configuration
+         * when use generic panel driver
+         */
+        const char *name;
+};
+
+/* Panel configurations */
+static struct panel_config generic_dpi_panels[] = {
+        /* Generic Panel */
+        {
+                {
+                        .x_res          = 640,
+                        .y_res          = 480,
+
+                        .pixel_clock    = 23500,
+
+                        .hfp            = 48,
+                        .hsw            = 32,
+                        .hbp            = 80,
+
+                        .vfp            = 3,
+                        .vsw            = 4,
+                        .vbp            = 7,
+                },
+                .acbi                   = 0x0,
+                .acb                    = 0x0,
+                .config                 = OMAP_DSS_LCD_TFT,
+                .power_on_delay         = 0,
+                .power_off_delay        = 0,
+                .name                   = "generic",
+        },
+
+        /* Sharp LQ043T1DG01 */
+        {
+                {
+                        .x_res          = 480,
+                        .y_res          = 272,
+
+                        .pixel_clock    = 9000,
+
+                        .hsw            = 42,
+                        .hfp            = 3,
+                        .hbp            = 2,
+
+                        .vsw            = 11,
+                        .vfp            = 3,
+                        .vbp            = 2,
+                },
+                .acbi                   = 0x0,
+                .acb                    = 0x0,
+                .config                 = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
+                                        OMAP_DSS_LCD_IHS | OMAP_DSS_LCD_IEO,
+                .power_on_delay         = 50,
+                .power_off_delay        = 100,
+                .name                   = "sharp_lq",
+        },
+
+        /* Sharp LS037V7DW01 */
+        {
+                {
+                        .x_res          = 480,
+                        .y_res          = 640,
+
+                        .pixel_clock    = 19200,
+
+                        .hsw            = 2,
+                        .hfp            = 1,
+                        .hbp            = 28,
+
+                        .vsw            = 1,
+                        .vfp            = 1,
+                        .vbp            = 1,
+                },
+                .acbi                   = 0x0,
+                .acb                    = 0x28,
+                .config                 = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
+                                                OMAP_DSS_LCD_IHS,
+                .power_on_delay         = 50,
+                .power_off_delay        = 100,
+                .name                   = "sharp_ls",
+        },
+
+        /* Toppoly TDO35S */
+        {
+                {
+                        .x_res          = 480,
+                        .y_res          = 640,
+
+                        .pixel_clock    = 26000,
+
+                        .hfp            = 104,
+                        .hsw            = 8,
+                        .hbp            = 8,
+
+                        .vfp            = 4,
+                        .vsw            = 2,
+                        .vbp            = 2,
+                },
+                .acbi                   = 0x0,
+                .acb                    = 0x0,
+                .config                 = OMAP_DSS_LCD_TFT | OMAP_DSS_LCD_IVS |
+                                        OMAP_DSS_LCD_IHS | OMAP_DSS_LCD_IPC |
+                                        OMAP_DSS_LCD_ONOFF,
+                .power_on_delay         = 0,
+                .power_off_delay        = 0,
+                .name                   = "toppoly_tdo35s",
+        },
+};
+
+struct panel_drv_data {
+
+        struct omap_dss_device *dssdev;
+
+        struct panel_config *panel_config;
+};
+
+static inline struct panel_generic_dpi_data
+*get_panel_data(const struct omap_dss_device *dssdev)
+{
+        return (struct panel_generic_dpi_data *) dssdev->data;
+}
+
+static int generic_dpi_panel_power_on(struct omap_dss_device *dssdev)
+{
+        int r;
+        struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev);
+        struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+        struct panel_config *panel_config = drv_data->panel_config;
+
+        if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
+                return 0;
+
+        r = omapdss_dpi_display_enable(dssdev);
+        if (r)
+                goto err0;
+
+        /* wait couple of vsyncs until enabling the LCD */
+        if (panel_config->power_on_delay)
+                msleep(panel_config->power_on_delay);
+
+        if (panel_data->platform_enable) {
+                r = panel_data->platform_enable(dssdev);
+                if (r)
+                        goto err1;
+        }
+
+        return 0;
+err1:
+        omapdss_dpi_display_disable(dssdev);
+err0:
+        return r;
+}
+
+static void generic_dpi_panel_power_off(struct omap_dss_device *dssdev)
+{
+        struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev);
+        struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+        struct panel_config *panel_config = drv_data->panel_config;
+
+        if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
+                return;
+
+        if (panel_data->platform_disable)
+                panel_data->platform_disable(dssdev);
+
+        /* wait couple of vsyncs after disabling the LCD */
+        if (panel_config->power_off_delay)
+                msleep(panel_config->power_off_delay);
+
+        omapdss_dpi_display_disable(dssdev);
+}
+
+static int generic_dpi_panel_probe(struct omap_dss_device *dssdev)
+{
+        struct panel_generic_dpi_data *panel_data = get_panel_data(dssdev);
+        struct panel_config *panel_config = NULL;
+        struct panel_drv_data *drv_data = NULL;
+        int i;
+
+        dev_dbg(&dssdev->dev, "probe\n");
+
+        if (!panel_data || !panel_data->name)
+                return -EINVAL;
+
+        for (i = 0; i < ARRAY_SIZE(generic_dpi_panels); i++) {
+                if (strcmp(panel_data->name, generic_dpi_panels[i].name) == 0) {
+                        panel_config = &generic_dpi_panels[i];
+                        break;
+                }
+        }
+
+        if (!panel_config)
+                return -EINVAL;
+
+        dssdev->panel.config = panel_config->config;
+        dssdev->panel.timings = panel_config->timings;
+        dssdev->panel.acb = panel_config->acb;
+        dssdev->panel.acbi = panel_config->acbi;
+
+        drv_data = kzalloc(sizeof(*drv_data), GFP_KERNEL);
+        if (!drv_data)
+                return -ENOMEM;
+
+        drv_data->dssdev = dssdev;
+        drv_data->panel_config = panel_config;
+
+        dev_set_drvdata(&dssdev->dev, drv_data);
+
+        return 0;
+}
+
+static void generic_dpi_panel_remove(struct omap_dss_device *dssdev)
+{
+        struct panel_drv_data *drv_data = dev_get_drvdata(&dssdev->dev);
+
+        dev_dbg(&dssdev->dev, "remove\n");
+
+        kfree(drv_data);
+
+        dev_set_drvdata(&dssdev->dev, NULL);
+}
+
+static int generic_dpi_panel_enable(struct omap_dss_device *dssdev)
+{
+        int r = 0;
+
+        r = generic_dpi_panel_power_on(dssdev);
+        if (r)
+                return r;
+
+        dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+        return 0;
+}
+
+static void generic_dpi_panel_disable(struct omap_dss_device *dssdev)
+{
+        generic_dpi_panel_power_off(dssdev);
+
+        dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
+}
+
+static int generic_dpi_panel_suspend(struct omap_dss_device *dssdev)
+{
+        generic_dpi_panel_power_off(dssdev);
+
+        dssdev->state = OMAP_DSS_DISPLAY_SUSPENDED;
+
+        return 0;
+}
+
+static int generic_dpi_panel_resume(struct omap_dss_device *dssdev)
+{
+        int r = 0;
+
+        r = generic_dpi_panel_power_on(dssdev);
+        if (r)
+                return r;
+
+        dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+        return 0;
+}
+
+static void generic_dpi_panel_set_timings(struct omap_dss_device *dssdev,
+                struct omap_video_timings *timings)
+{
+        dpi_set_timings(dssdev, timings);
+}
+
+static void generic_dpi_panel_get_timings(struct omap_dss_device *dssdev,
+                struct omap_video_timings *timings)
+{
+        *timings = dssdev->panel.timings;
+}
+
+static int generic_dpi_panel_check_timings(struct omap_dss_device *dssdev,
+                struct omap_video_timings *timings)
+{
+        return dpi_check_timings(dssdev, timings);
+}
+
+static struct omap_dss_driver dpi_driver = {
+        .probe          = generic_dpi_panel_probe,
+        .remove         = generic_dpi_panel_remove,
+
+        .enable         = generic_dpi_panel_enable,
+        .disable        = generic_dpi_panel_disable,
+        .suspend        = generic_dpi_panel_suspend,
+        .resume         = generic_dpi_panel_resume,
+
+        .set_timings    = generic_dpi_panel_set_timings,
+        .get_timings    = generic_dpi_panel_get_timings,
+        .check_timings  = generic_dpi_panel_check_timings,
+
+        .driver         = {
+                .name   = "generic_dpi_panel",
+                .owner  = THIS_MODULE,
+        },
+};
+
+static int __init generic_dpi_panel_drv_init(void)
+{
+        return omap_dss_register_driver(&dpi_driver);
+}
+
+static void __exit generic_dpi_panel_drv_exit(void)
+{
+        omap_dss_unregister_driver(&dpi_driver);
+}
+
+module_init(generic_dpi_panel_drv_init);
+module_exit(generic_dpi_panel_drv_exit);
+MODULE_LICENSE("GPL");