this patch addes MIPI-DSI based sample panel driver.
to write MIPI-DSI based lcd panel driver, you can refer to
this sample driver.
Signed-off-by: Inki Dae <inki.dae@xxxxxxxxxxx>
---
drivers/video/Kconfig | 7 ++
drivers/video/Makefile | 1 +
drivers/video/s5p_mipi_sample.c | 220 +++++++++++++++++++++++++++++++++++++++
3 files changed, 228 insertions(+), 0 deletions(-)
create mode 100644 drivers/video/s5p_mipi_sample.c
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index aa305c5..325ce86 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -2003,6 +2003,13 @@ config S5P_MIPI_DSI
---help---
This enables support for MIPI-DSI device.
+config S5P_MIPI_SAMPLE
+ tristate "Samsung SoC MIPI-DSI based sample driver."
+ depends on S5P_MIPI_DSI && BACKLIGHT_LCD_SUPPORT
+ default n
+ ---help---
+ This enables support for MIPI-DSI based sample driver.
+
config FB_NUC900
bool "NUC900 LCD framebuffer support"
depends on FB && ARCH_W90X900
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index f4baed6..c8ac591 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -117,6 +117,7 @@ obj-$(CONFIG_FB_S3C) += s3c-fb.o
obj-$(CONFIG_FB_S3C2410) += s3c2410fb.o
obj-$(CONFIG_S5P_MIPI_DSI) += s5p_mipi_dsi.o s5p_mipi_dsi_common.o \
s5p_mipi_dsi_lowlevel.o
+obj-$(CONFIG_S5P_MIPI_SAMPLE) += s5p_mipi_sample.o
obj-$(CONFIG_FB_FSL_DIU) += fsl-diu-fb.o
obj-$(CONFIG_FB_COBALT) += cobalt_lcdfb.o
obj-$(CONFIG_FB_PNX4008_DUM) += pnx4008/
diff --git a/drivers/video/s5p_mipi_sample.c b/drivers/video/s5p_mipi_sample.c
new file mode 100644
index 0000000..8a8abfe
--- /dev/null
+++ b/drivers/video/s5p_mipi_sample.c
@@ -0,0 +1,220 @@
+/* linux/drivers/video/sample.c
+ *
+ * MIPI-DSI based sample AMOLED lcd panel driver.
+ *
+ * Inki Dae, <inki.dae@xxxxxxxxxxx>
+ *
+ * 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.
+*/
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/ctype.h>
+#include <linux/io.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/lcd.h>
+#include <linux/backlight.h>
+
+#include <video/mipi_display.h>
+
+#include <plat/mipi-dsi.h>
+#include <plat/mipi-ddi.h>
+
+#define MIN_BRIGHTNESS (0)
+#define MAX_BRIGHTNESS (10)
+
+#define lcd_to_master(a) (a->mipi_dev->master)
+#define lcd_to_master_ops(a) ((lcd_to_master(a))->master_ops)
+#define device_to_ddi_pd(a) (a->master->dsim_info->mipi_ddi_pd)
+
+struct sample {
+ struct device *dev;
+
+ struct lcd_device *ld;
+ struct backlight_device *bd;
+
+ struct mipi_lcd_device *mipi_dev;
+ struct mipi_ddi_platform_data *ddi_pd;
+};
+
+static void sample_long_command(struct sample *lcd)
+{
+ struct dsim_master_ops *ops = lcd_to_master_ops(lcd);
+ unsigned char data_to_send[5] = {
+ 0x00, 0x00, 0x00, 0x00, 0x00
+ };
+
+ ops->cmd_write(lcd_to_master(lcd), MIPI_DSI_DCS_LONG_WRITE,
+ (unsigned int) data_to_send, sizeof(data_to_send));
+}
+
+static void sample_short_command(struct sample *lcd)
+{
+ struct dsim_master_ops *ops = lcd_to_master_ops(lcd);
+
+ ops->cmd_write(lcd_to_master(lcd), MIPI_DSI_DCS_SHORT_WRITE_PARAM,
+ 0x00, 0x00);
+}
+
+static int sample_panel_init(struct sample *lcd)
+{
+ sample_long_command(lcd);
+ sample_short_command(lcd);
+
+ return 0;
+}
+
+static int sample_gamma_ctrl(struct sample *lcd, int gamma)
+{
+ struct dsim_master_ops *ops = lcd_to_master_ops(lcd);
+
+ /* change transfer mode to LP mode */
+ if (ops->change_dsim_transfer_mode)
+ ops->change_dsim_transfer_mode(lcd_to_master(lcd), 0);
+
+ /* update gamma table. */
+
+ /* change transfer mode to HS mode */
+ if (ops->change_dsim_transfer_mode)
+ ops->change_dsim_transfer_mode(lcd_to_master(lcd), 1);
+
+ return 0;
+}
+
+static int sample_get_brightness(struct backlight_device *bd)
+{
+ return bd->props.brightness;
+}
+
+static int sample_set_brightness(struct backlight_device *bd)
+{
+ int ret = 0, brightness = bd->props.brightness;
+ struct sample *lcd = bl_get_data(bd);
+
+ if (brightness < MIN_BRIGHTNESS ||
+ brightness > bd->props.max_brightness) {
+ dev_err(lcd->dev, "lcd brightness should be %d to %d.\n",
+ MIN_BRIGHTNESS, MAX_BRIGHTNESS);
+ return -EINVAL;
+ }
+
+ ret = sample_gamma_ctrl(lcd, bd->props.brightness);
+ if (ret) {
+ dev_err(&bd->dev, "lcd brightness setting failed.\n");
+ return -EIO;
+ }
+
+ return ret;
+}
+
+static const struct backlight_ops sample_backlight_ops = {
+ .get_brightness = sample_get_brightness,
+ .update_status = sample_set_brightness,
+};
+
+static int sample_probe(struct mipi_lcd_device *mipi_dev)
+{
+ struct sample *lcd = NULL;
+ struct backlight_device *bd = NULL;
+
+ lcd = kzalloc(sizeof(struct sample), GFP_KERNEL);
+ if (!lcd) {
+ dev_err(&mipi_dev->dev, "failed to allocate sample structure.\n");
+ return -ENOMEM;
+ }
+
+ lcd->mipi_dev = mipi_dev;
+ lcd->ddi_pd =
+ (struct mipi_ddi_platform_data *)device_to_ddi_pd(mipi_dev);
+ lcd->dev = &mipi_dev->dev;
+
+ dev_set_drvdata(&mipi_dev->dev, lcd);
+
+ bd = backlight_device_register("sample-bl", lcd->dev, lcd,
+ &sample_backlight_ops, NULL);
+
+ lcd->bd = bd;
+
+ bd->props.max_brightness = MAX_BRIGHTNESS;
+ bd->props.brightness = MAX_BRIGHTNESS;
+
+ /* lcd power on */
+ if (lcd->ddi_pd->lcd_power_on)
+ lcd->ddi_pd->lcd_power_on(NULL, 1);
+
+ mdelay(lcd->ddi_pd->reset_delay);
+
+ /* lcd reset */
+ if (lcd->ddi_pd->lcd_reset)
+ lcd->ddi_pd->lcd_reset(NULL);
+
+ sample_panel_init(lcd);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int sample_suspend(struct mipi_lcd_device *mipi_dev)
+{
+ struct sample *lcd = dev_get_drvdata(&mipi_dev->dev);
+
+ /* some work. */
+
+ mdelay(lcd->ddi_pd->power_off_delay);
+
+ /* lcd power off */
+ if (lcd->ddi_pd->lcd_power_on)
+ lcd->ddi_pd->lcd_power_on(NULL, 0);
+
+ return 0;
+}
+
+static int sample_resume(struct mipi_lcd_device *mipi_dev)
+{
+ struct sample *lcd = dev_get_drvdata(&mipi_dev->dev);
+
+ mdelay(lcd->ddi_pd->power_on_delay);
+
+ /* lcd power on */
+ if (lcd->ddi_pd->lcd_power_on)
+ lcd->ddi_pd->lcd_power_on(NULL, 1);
+
+ /* some work. */
+
+ return 0;
+}
+#else
+#define sample_suspend NULL
+#define sample_resume NULL
+#endif
+
+static struct mipi_lcd_driver sample_mipi_driver = {
+ .name = "sample",
+
+ .probe = sample_probe,
+ .suspend = sample_suspend,
+ .resume = sample_resume,
+};
+
+static int sample_init(void)
+{
+ s5p_mipi_register_lcd_driver(&sample_mipi_driver);
+
+ return 0;
+}
+
+static void sample_exit(void)
+{
+ return;
+}
+
+module_init(sample_init);
+module_exit(sample_exit);
+
+MODULE_AUTHOR("Inki Dae <inki.dae@xxxxxxxxxxx>");
+MODULE_DESCRIPTION("MIPI-DSI based sample AMOLED LCD Panel Driver");
+MODULE_LICENSE("GPL");
--
1.7.0.4
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