diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/video/Makefile | 3 | ||||
| -rw-r--r-- | drivers/video/simplefb-client.c | 149 | ||||
| -rw-r--r-- | drivers/video/simplefb-fixup.c (renamed from drivers/video/simplefb.c) | 0 |
4 files changed, 158 insertions, 2 deletions
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index b6d468c63c..95d993dde8 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -101,8 +101,14 @@ source "drivers/video/imx-ipu-v3/Kconfig" source "drivers/video/bochs/Kconfig" +config DRIVER_VIDEO_SIMPLEFB_CLIENT + bool "Simple framebuffer client support" + depends on OFTREE + help + Add support for reusing a previously set up simple framebuffer. + config DRIVER_VIDEO_SIMPLEFB - bool "Simple framebuffer support" + bool "Simple framebuffer fixup support" depends on OFTREE help Add support for setting up the kernel's simple framebuffer driver diff --git a/drivers/video/Makefile b/drivers/video/Makefile index 28d0fe205b..2c002f7e53 100644 --- a/drivers/video/Makefile +++ b/drivers/video/Makefile @@ -19,7 +19,8 @@ obj-$(CONFIG_DRIVER_VIDEO_PXA) += pxa.o obj-$(CONFIG_DRIVER_VIDEO_SDL) += sdl.o obj-$(CONFIG_DRIVER_VIDEO_OMAP) += omap.o obj-$(CONFIG_DRIVER_VIDEO_BCM283X) += bcm2835.o -obj-$(CONFIG_DRIVER_VIDEO_SIMPLEFB) += simplefb.o +obj-$(CONFIG_DRIVER_VIDEO_SIMPLEFB_CLIENT) += simplefb-client.o +obj-$(CONFIG_DRIVER_VIDEO_SIMPLEFB) += simplefb-fixup.o obj-$(CONFIG_DRIVER_VIDEO_IMX_IPUV3) += imx-ipu-v3/ obj-$(CONFIG_DRIVER_VIDEO_EFI_GOP) += efi_gop.o obj-$(CONFIG_DRIVER_VIDEO_FB_SSD1307) += ssd1307fb.o diff --git a/drivers/video/simplefb-client.c b/drivers/video/simplefb-client.c new file mode 100644 index 0000000000..2d0495f616 --- /dev/null +++ b/drivers/video/simplefb-client.c @@ -0,0 +1,149 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Simplest possible simple frame-buffer driver, as a platform device + * + * Copyright (c) 2013, Stephen Warren + * + * Based on q40fb.c, which was: + * Copyright (C) 2001 Richard Zidlicky <rz@linux-m68k.org> + * + * Also based on offb.c, which was: + * Copyright (C) 1997 Geert Uytterhoeven + * Copyright (C) 1996 Paul Mackerras + */ + +#include <common.h> +#include <fb.h> +#include <io.h> +#include <linux/platform_data/simplefb.h> +#include <driver.h> +#include <of.h> + +static struct fb_ops simplefb_ops; + +static struct simplefb_format simplefb_formats[] = SIMPLEFB_FORMATS; + +struct simplefb_params { + u32 width; + u32 height; + u32 stride; + struct simplefb_format *format; +}; + +static int simplefb_parse_dt(struct device_d *dev, + struct simplefb_params *params) +{ + struct device_node *np = dev->device_node; + int ret; + const char *format; + int i; + + ret = of_property_read_u32(np, "width", ¶ms->width); + if (ret) { + dev_err(dev, "Can't parse width property\n"); + return ret; + } + + ret = of_property_read_u32(np, "height", ¶ms->height); + if (ret) { + dev_err(dev, "Can't parse height property\n"); + return ret; + } + + ret = of_property_read_u32(np, "stride", ¶ms->stride); + if (ret) { + dev_err(dev, "Can't parse stride property\n"); + return ret; + } + + ret = of_property_read_string(np, "format", &format); + if (ret) { + dev_err(dev, "Can't parse format property\n"); + return ret; + } + params->format = NULL; + for (i = 0; i < ARRAY_SIZE(simplefb_formats); i++) { + if (strcmp(format, simplefb_formats[i].name)) + continue; + params->format = &simplefb_formats[i]; + break; + } + if (!params->format) { + dev_err(dev, "Invalid format value\n"); + return -EINVAL; + } + + return 0; +} + +static int simplefb_probe(struct device_d *dev) +{ + int ret; + struct simplefb_params params; + struct fb_info *info; + struct resource *mem; + + ret = -ENODEV; + if (dev->device_node) + ret = simplefb_parse_dt(dev, ¶ms); + + if (ret) + return ret; + + mem = dev_request_mem_resource(dev, 0); + if (IS_ERR(mem)) { + dev_err(dev, "No memory resource\n"); + return PTR_ERR(mem); + } + + info = xzalloc(sizeof(*info)); + dev->priv = info; + + info->xres = params.width; + info->yres = params.height; + info->bits_per_pixel = params.format->bits_per_pixel; + info->red = params.format->red; + info->green = params.format->green; + info->blue = params.format->blue; + info->transp = params.format->transp; + info->line_length = params.stride; + + info->screen_base = (void *)mem->start; + info->screen_size = resource_size(mem); + + + info->fbops = &simplefb_ops; + + dev_info(dev, "framebuffer at 0x%p, 0x%lx bytes\n", + info->screen_base, info->screen_size); + dev_info(dev, "format=%s, mode=%dx%dx%d, linelength=%d\n", + params.format->name, + info->xres, info->yres, + info->bits_per_pixel, info->line_length); + + ret = register_framebuffer(info); + if (ret < 0) { + dev_err(dev, "Unable to register simplefb: %d\n", ret); + return ret; + } + + dev_info(dev, "simplefb registered!\n"); + + return 0; +} + +static const struct of_device_id simplefb_of_match[] = { + { .compatible = "simple-framebuffer", }, + { }, +}; + +static struct driver_d simplefb_driver = { + .name = "simple-framebuffer", + .of_compatible = simplefb_of_match, + .probe = simplefb_probe, +}; +device_platform_driver(simplefb_driver); + +MODULE_AUTHOR("Stephen Warren <swarren@wwwdotorg.org>"); +MODULE_DESCRIPTION("Simple framebuffer driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/video/simplefb.c b/drivers/video/simplefb-fixup.c index a2c59de364..a2c59de364 100644 --- a/drivers/video/simplefb.c +++ b/drivers/video/simplefb-fixup.c |