diff options
| -rw-r--r-- | drivers/video/Kconfig | 5 | ||||
| -rw-r--r-- | drivers/video/simplefb.c | 48 | ||||
| -rw-r--r-- | include/linux/platform_data/simplefb.h | 56 |
3 files changed, 93 insertions, 16 deletions
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 4cf1e1dd5621..34c3d960634d 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -2457,7 +2457,7 @@ config FB_HYPERV config FB_SIMPLE bool "Simple framebuffer support" - depends on (FB = y) && OF + depends on (FB = y) select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT @@ -2469,8 +2469,7 @@ config FB_SIMPLE pre-allocated frame buffer surface. Configuration re: surface address, size, and format must be provided - through device tree, or potentially plain old platform data in the - future. + through device tree, or plain old platform data. source "drivers/video/omap/Kconfig" source "drivers/video/omap2/Kconfig" diff --git a/drivers/video/simplefb.c b/drivers/video/simplefb.c index e2e9e3e61b72..588698986ce1 100644 --- a/drivers/video/simplefb.c +++ b/drivers/video/simplefb.c @@ -24,6 +24,7 @@ #include <linux/fb.h> #include <linux/io.h> #include <linux/module.h> +#include <linux/platform_data/simplefb.h> #include <linux/platform_device.h> static struct fb_fix_screeninfo simplefb_fix = { @@ -73,18 +74,7 @@ static struct fb_ops simplefb_ops = { .fb_imageblit = cfb_imageblit, }; -struct simplefb_format { - const char *name; - u32 bits_per_pixel; - struct fb_bitfield red; - struct fb_bitfield green; - struct fb_bitfield blue; - struct fb_bitfield transp; -}; - -static struct simplefb_format simplefb_formats[] = { - { "r5g6b5", 16, {11, 5}, {5, 6}, {0, 5}, {0, 0} }, -}; +static struct simplefb_format simplefb_formats[] = SIMPLEFB_FORMATS; struct simplefb_params { u32 width; @@ -139,6 +129,33 @@ static int simplefb_parse_dt(struct platform_device *pdev, return 0; } +static int simplefb_parse_pd(struct platform_device *pdev, + struct simplefb_params *params) +{ + struct simplefb_platform_data *pd = pdev->dev.platform_data; + int i; + + params->width = pd->width; + params->height = pd->height; + params->stride = pd->stride; + + params->format = NULL; + for (i = 0; i < ARRAY_SIZE(simplefb_formats); i++) { + if (strcmp(pd->format, simplefb_formats[i].name)) + continue; + + params->format = &simplefb_formats[i]; + break; + } + + if (!params->format) { + dev_err(&pdev->dev, "Invalid format value\n"); + return -EINVAL; + } + + return 0; +} + static int simplefb_probe(struct platform_device *pdev) { int ret; @@ -149,7 +166,12 @@ static int simplefb_probe(struct platform_device *pdev) if (fb_get_options("simplefb", NULL)) return -ENODEV; - ret = simplefb_parse_dt(pdev, ¶ms); + ret = -ENODEV; + if (pdev->dev.platform_data) + ret = simplefb_parse_pd(pdev, ¶ms); + else if (pdev->dev.of_node) + ret = simplefb_parse_dt(pdev, ¶ms); + if (ret) return ret; diff --git a/include/linux/platform_data/simplefb.h b/include/linux/platform_data/simplefb.h new file mode 100644 index 000000000000..5fa2c5e02ab8 --- /dev/null +++ b/include/linux/platform_data/simplefb.h @@ -0,0 +1,56 @@ +/* + * simplefb.h - Simple Framebuffer Device + * + * Copyright (C) 2013 David Herrmann <dh.herrmann@gmail.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#ifndef __PLATFORM_DATA_SIMPLEFB_H__ +#define __PLATFORM_DATA_SIMPLEFB_H__ + +#include <drm/drm_fourcc.h> +#include <linux/fb.h> +#include <linux/kernel.h> + +/* format array, use it to initialize a "struct simplefb_format" array */ +#define SIMPLEFB_FORMATS \ +{ \ + { "r5g6b5", 16, {11, 5}, {5, 6}, {0, 5}, {0, 0}, DRM_FORMAT_RGB565 }, \ +} + +/* + * Data-Format for Simple-Framebuffers + * @name: unique 0-terminated name that can be used to identify the mode + * @red,green,blue: Offsets and sizes of the single RGB parts + * @transp: Offset and size of the alpha bits. length=0 means no alpha + * @fourcc: 32bit DRM four-CC code (see drm_fourcc.h) + */ +struct simplefb_format { + const char *name; + u32 bits_per_pixel; + struct fb_bitfield red; + struct fb_bitfield green; + struct fb_bitfield blue; + struct fb_bitfield transp; + u32 fourcc; +}; + +/* + * Simple-Framebuffer description + * If the arch-boot code creates simple-framebuffers without DT support, it + * can pass the width, height, stride and format via this platform-data object. + * The framebuffer location must be given as IORESOURCE_MEM resource. + * @format must be a format as described in "struct simplefb_format" above. + */ +struct simplefb_platform_data { + u32 width; + u32 height; + u32 stride; + const char *format; +}; + +#endif /* __PLATFORM_DATA_SIMPLEFB_H__ */ |