Re: [PATCH 4/6] OMAP: LDP: Port the display driver to new DSS2

Igor Grinberg
2011-05-16T11:13:07Z

On 05/16/11 11:53, Tomi Valkeinen wrote:

> Here's an updated patch with the twl gpio code.

Looks good, though one minor issue below

> All the old omapfb porting patches, including new drivers for DSS2, can
> be found from
>
> git://gitorious.org/linux-omap-dss2/linux.git old-omapfb-port
>
> Tomi
>
> diff --git a/arch/arm/mach-omap2/board-ldp.c b/arch/arm/mach-omap2/board-ldp.c
> index e2ba779..ed78b9a 100644
> --- a/arch/arm/mach-omap2/board-ldp.c
> +++ b/arch/arm/mach-omap2/board-ldp.c
> @@ -44,6 +44,9 @@
> #include <asm/delay.h>
> #include <plat/usb.h>
>
> +#include <video/omapdss.h>
> +#include <video/omap-panel-generic-dpi.h>
> +
> #include "board-flash.h"
> #include "mux.h"
> #include "hsmmc.h"
> @@ -275,19 +278,70 @@ static inline void __init ldp_init_smsc911x(void)
> gpio_direction_input(eth_gpio);
> }
>
> -static struct platform_device ldp_lcd_device = {
> - .name = "ldp_lcd",
> - .id = -1,
> +/* LCD */
> +
> +static int ldp_backlight_gpio;
> +static int ldp_lcd_enable_gpio;
> +
> +#define LCD_PANEL_RESET_GPIO 55
> +#define LCD_PANEL_QVGA_GPIO 56
> +
> +static int ldp_panel_enable_lcd(struct omap_dss_device *dssdev)
> +{
> + gpio_direction_output(ldp_lcd_enable_gpio, 1);
> + gpio_direction_output(ldp_backlight_gpio, 1);
> +
> + return 0;
> +}
> +
> +static void ldp_panel_disable_lcd(struct omap_dss_device *dssdev)
> +{
> + gpio_direction_output(ldp_lcd_enable_gpio, 0);
> + gpio_direction_output(ldp_backlight_gpio, 0);
> +}
> +
> +static struct panel_generic_dpi_data ldp_panel_data = {
> + .name = "2430sdp",
> + .platform_enable = ldp_panel_enable_lcd,
> + .platform_disable = ldp_panel_disable_lcd,
> +};
> +
> +static struct omap_dss_device ldp_lcd_device = {
> + .name = "lcd",
> + .driver_name = "generic_dpi_panel",
> + .type = OMAP_DISPLAY_TYPE_DPI,
> + .phy.dpi.data_lines = 16,
> + .data = &ldp_panel_data,
> };
>
> -static struct omap_lcd_config ldp_lcd_config __initdata = {
> - .ctrl_name = "internal",
> +static struct omap_dss_device *ldp_dss_devices[] = {
> + &ldp_lcd_device,
> };
>
> -static struct omap_board_config_kernel ldp_config[] __initdata = {
> - { OMAP_TAG_LCD, &ldp_lcd_config },
> +static struct omap_dss_board_info ldp_dss_data = {
> + .num_devices = ARRAY_SIZE(ldp_dss_devices),
> + .devices = ldp_dss_devices,
> + .default_device = &ldp_lcd_device,
> };
>
> +static void __init ldp_display_init(void)
> +{
> + int r;
> +
> + static struct gpio gpios[] __initdata = {
> + {LCD_PANEL_RESET_GPIO, GPIOF_OUT_INIT_HIGH, "LCD RESET"},
> + {LCD_PANEL_QVGA_GPIO, GPIOF_OUT_INIT_HIGH, "LCD QVGA"},
> + };
> +
> + r = gpio_request_array(gpios, ARRAY_SIZE(gpios));
> + if (r) {
> + pr_err("Cannot request LCD GPIOs, error %d\n", r);
> + return;
> + }
> +
> + omap_display_init(&ldp_dss_data);
> +}
> +
> static void __init omap_ldp_init_early(void)
> {
> omap2_init_common_infrastructure();
> @@ -298,10 +352,30 @@ static struct twl4030_usb_data ldp_usb_data = {
> .usb_mode = T2_USB_MODE_ULPI,
> };
>
> +static int ldp_twl_gpio_setup(struct device *dev, unsigned gpio, unsigned ngpio)
> +{
> + int r;
> +
> + struct gpio gpios[] = {
> + {gpio + 7 , GPIOF_OUT_INIT_LOW, "LCD ENABLE"},
> + {gpio + 15, GPIOF_OUT_INIT_LOW, "LCD BACKLIGHT"},
> + };
> +
> + r = gpio_request_array(gpios, ARRAY_SIZE(gpios));
> + if (r)
> + pr_err("Cannot request LCD GPIOs, error %d\n", r);
> +
> + ldp_backlight_gpio = gpio + 15;
> + ldp_lcd_enable_gpio = gpio + 7;

If the gpio_request_array() fails (though it shouldn't),
won't it be right to set both variables to -EINVAL?

Other then that, you can have my
Signed-off-by: Igor Grinberg <grinberg@compulab.co.il>

Thanks for bringing this all together.

--
Regards,
Igor.