From 8c090cfbf980581454ae4caae731574fedd7dce8 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Thu, 2 May 2013 17:16:23 +0200 Subject: staging/solo6x10: depend on CONFIG_FONTS The new SOLO6X10 driver needs the built-in console fonts, specifically the VGA8x16 font and building it without console support results in a link error error. drivers/built-in.o: In function `solo_osd_print': :(.text+0x7d3424): undefined reference to `find_font' This adds a dependency on the CONFIG_FONTS symbol and changes the console code to always build the base driver even if there are no specific fonts built-in. Cc: Greg Kroah-Hartman Cc: Hans Verkuil Cc: Mauro Carvalho Chehab Signed-off-by: Arnd Bergmann Signed-off-by: Greg Kroah-Hartman --- drivers/video/console/Makefile | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/video') diff --git a/drivers/video/console/Makefile b/drivers/video/console/Makefile index a862e9173ebe..48da25c96cd3 100644 --- a/drivers/video/console/Makefile +++ b/drivers/video/console/Makefile @@ -18,6 +18,8 @@ font-objs-$(CONFIG_FONT_MINI_4x6) += font_mini_4x6.o font-objs += $(font-objs-y) +obj-$(CONFIG_FONTS) += font.o + # Each configuration option enables a list of files. obj-$(CONFIG_DUMMY_CONSOLE) += dummycon.o -- cgit v1.2.3 From dc83d05b10046686882e4f07a3242aa7319de49b Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Sun, 12 May 2013 15:19:53 +0200 Subject: drivers/video/omap2: don't check resource with devm_ioremap_resource devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang --- drivers/video/omap2/vrfb.c | 5 ----- 1 file changed, 5 deletions(-) (limited to 'drivers/video') diff --git a/drivers/video/omap2/vrfb.c b/drivers/video/omap2/vrfb.c index 5261229c79af..f346b02eee1d 100644 --- a/drivers/video/omap2/vrfb.c +++ b/drivers/video/omap2/vrfb.c @@ -353,11 +353,6 @@ static int __init vrfb_probe(struct platform_device *pdev) /* first resource is the register res, the rest are vrfb contexts */ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!mem) { - dev_err(&pdev->dev, "can't get vrfb base address\n"); - return -EINVAL; - } - vrfb_base = devm_ioremap_resource(&pdev->dev, mem); if (IS_ERR(vrfb_base)) return PTR_ERR(vrfb_base); -- cgit v1.2.3 From ffc0775be17784e258836919fd3ec9c02bb6dc25 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Sun, 12 May 2013 15:19:53 +0200 Subject: drivers/video/omap2/dss: don't check resource with devm_ioremap_resource devm_ioremap_resource does sanity checks on the given resource. No need to duplicate this in the driver. Signed-off-by: Wolfram Sang --- drivers/video/omap2/dss/hdmi.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'drivers/video') diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c index 17f4d55c621c..a109934c0478 100644 --- a/drivers/video/omap2/dss/hdmi.c +++ b/drivers/video/omap2/dss/hdmi.c @@ -1065,10 +1065,6 @@ static int omapdss_hdmihw_probe(struct platform_device *pdev) mutex_init(&hdmi.ip_data.lock); res = platform_get_resource(hdmi.pdev, IORESOURCE_MEM, 0); - if (!res) { - DSSERR("can't get IORESOURCE_MEM HDMI\n"); - return -EINVAL; - } /* Base address taken from platform */ hdmi.ip_data.base_wp = devm_ioremap_resource(&pdev->dev, res); -- cgit v1.2.3 From 26549c8d36a64d9130e4c0f32412be7ba6180923 Mon Sep 17 00:00:00 2001 From: Stephen Warren Date: Fri, 24 May 2013 15:55:13 -0700 Subject: drivers/video: implement a simple framebuffer driver A simple frame-buffer describes a raw memory region that may be rendered to, with the assumption that the display hardware has already been set up to scan out from that buffer. This is useful in cases where a bootloader exists and has set up the display hardware, but a Linux driver doesn't yet exist for the display hardware. Examples use-cases include: * The built-in LCD panels on the Samsung ARM chromebook, and Tegra devices, and likely many other ARM or embedded systems. These cannot yet be supported using a full graphics driver, since the panel control should be provided by the CDF (Common Display Framework), which has been stuck in design/review for quite some time. One could support these panels using custom SoC-specific code, but there is a desire to use common infra-structure rather than having each SoC vendor invent their own code, hence the desire to wait for CDF. * Hardware for which a full graphics driver is not yet available, and the path to obtain one upstream isn't yet clear. For example, the Raspberry Pi. * Any hardware in early stages of upstreaming, before a full graphics driver has been tackled. This driver can provide a graphical boot console (even full X support) much earlier in the upstreaming process, thus making new SoC or board support more generally useful earlier. [akpm@linux-foundation.org: make simplefb_formats[] static] Signed-off-by: Stephen Warren Cc: Arnd Bergmann Acked-by: Olof Johansson Cc: Rob Clark Cc: Florian Tobias Schandinat Cc: Tomasz Figa Cc: Laurent Pinchart Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- .../bindings/video/simple-framebuffer.txt | 25 +++ drivers/video/Kconfig | 17 ++ drivers/video/Makefile | 1 + drivers/video/simplefb.c | 234 +++++++++++++++++++++ 4 files changed, 277 insertions(+) create mode 100644 Documentation/devicetree/bindings/video/simple-framebuffer.txt create mode 100644 drivers/video/simplefb.c (limited to 'drivers/video') diff --git a/Documentation/devicetree/bindings/video/simple-framebuffer.txt b/Documentation/devicetree/bindings/video/simple-framebuffer.txt new file mode 100644 index 000000000000..3ea460583111 --- /dev/null +++ b/Documentation/devicetree/bindings/video/simple-framebuffer.txt @@ -0,0 +1,25 @@ +Simple Framebuffer + +A simple frame-buffer describes a raw memory region that may be rendered to, +with the assumption that the display hardware has already been set up to scan +out from that buffer. + +Required properties: +- compatible: "simple-framebuffer" +- reg: Should contain the location and size of the framebuffer memory. +- width: The width of the framebuffer in pixels. +- height: The height of the framebuffer in pixels. +- stride: The number of bytes in each line of the framebuffer. +- format: The format of the framebuffer surface. Valid values are: + - r5g6b5 (16-bit pixels, d[15:11]=r, d[10:5]=g, d[4:0]=b). + +Example: + + framebuffer { + compatible = "simple-framebuffer"; + reg = <0x1d385000 (1600 * 1200 * 2)>; + width = <1600>; + height = <1200>; + stride = <(1600 * 2)>; + format = "r5g6b5"; + }; diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index d71d60f94fc1..62460561077e 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -2453,6 +2453,23 @@ config FB_HYPERV help This framebuffer driver supports Microsoft Hyper-V Synthetic Video. +config FB_SIMPLE + bool "Simple framebuffer support" + depends on (FB = y) && OF + select FB_CFB_FILLRECT + select FB_CFB_COPYAREA + select FB_CFB_IMAGEBLIT + help + Say Y if you want support for a simple frame-buffer. + + This driver assumes that the display hardware has been initialized + before the kernel boots, and the kernel will simply render to the + 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. + source "drivers/video/omap/Kconfig" source "drivers/video/omap2/Kconfig" source "drivers/video/exynos/Kconfig" diff --git a/drivers/video/Makefile b/drivers/video/Makefile index 7234e4a959e8..e8bae8dd4804 100644 --- a/drivers/video/Makefile +++ b/drivers/video/Makefile @@ -166,6 +166,7 @@ obj-$(CONFIG_FB_MX3) += mx3fb.o obj-$(CONFIG_FB_DA8XX) += da8xx-fb.o obj-$(CONFIG_FB_MXS) += mxsfb.o obj-$(CONFIG_FB_SSD1307) += ssd1307fb.o +obj-$(CONFIG_FB_SIMPLE) += simplefb.o # the test framebuffer is last obj-$(CONFIG_FB_VIRTUAL) += vfb.o diff --git a/drivers/video/simplefb.c b/drivers/video/simplefb.c new file mode 100644 index 000000000000..e2e9e3e61b72 --- /dev/null +++ b/drivers/video/simplefb.c @@ -0,0 +1,234 @@ +/* + * 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 + * + * Also based on offb.c, which was: + * Copyright (C) 1997 Geert Uytterhoeven + * Copyright (C) 1996 Paul Mackerras + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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. + */ + +#include +#include +#include +#include +#include + +static struct fb_fix_screeninfo simplefb_fix = { + .id = "simple", + .type = FB_TYPE_PACKED_PIXELS, + .visual = FB_VISUAL_TRUECOLOR, + .accel = FB_ACCEL_NONE, +}; + +static struct fb_var_screeninfo simplefb_var = { + .height = -1, + .width = -1, + .activate = FB_ACTIVATE_NOW, + .vmode = FB_VMODE_NONINTERLACED, +}; + +static int simplefb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, + u_int transp, struct fb_info *info) +{ + u32 *pal = info->pseudo_palette; + u32 cr = red >> (16 - info->var.red.length); + u32 cg = green >> (16 - info->var.green.length); + u32 cb = blue >> (16 - info->var.blue.length); + u32 value; + + if (regno >= 16) + return -EINVAL; + + value = (cr << info->var.red.offset) | + (cg << info->var.green.offset) | + (cb << info->var.blue.offset); + if (info->var.transp.length > 0) { + u32 mask = (1 << info->var.transp.length) - 1; + mask <<= info->var.transp.offset; + value |= mask; + } + pal[regno] = value; + + return 0; +} + +static struct fb_ops simplefb_ops = { + .owner = THIS_MODULE, + .fb_setcolreg = simplefb_setcolreg, + .fb_fillrect = cfb_fillrect, + .fb_copyarea = cfb_copyarea, + .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} }, +}; + +struct simplefb_params { + u32 width; + u32 height; + u32 stride; + struct simplefb_format *format; +}; + +static int simplefb_parse_dt(struct platform_device *pdev, + struct simplefb_params *params) +{ + struct device_node *np = pdev->dev.of_node; + int ret; + const char *format; + int i; + + ret = of_property_read_u32(np, "width", ¶ms->width); + if (ret) { + dev_err(&pdev->dev, "Can't parse width property\n"); + return ret; + } + + ret = of_property_read_u32(np, "height", ¶ms->height); + if (ret) { + dev_err(&pdev->dev, "Can't parse height property\n"); + return ret; + } + + ret = of_property_read_u32(np, "stride", ¶ms->stride); + if (ret) { + dev_err(&pdev->dev, "Can't parse stride property\n"); + return ret; + } + + ret = of_property_read_string(np, "format", &format); + if (ret) { + dev_err(&pdev->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(&pdev->dev, "Invalid format value\n"); + return -EINVAL; + } + + return 0; +} + +static int simplefb_probe(struct platform_device *pdev) +{ + int ret; + struct simplefb_params params; + struct fb_info *info; + struct resource *mem; + + if (fb_get_options("simplefb", NULL)) + return -ENODEV; + + ret = simplefb_parse_dt(pdev, ¶ms); + if (ret) + return ret; + + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!mem) { + dev_err(&pdev->dev, "No memory resource\n"); + return -EINVAL; + } + + info = framebuffer_alloc(sizeof(u32) * 16, &pdev->dev); + if (!info) + return -ENOMEM; + platform_set_drvdata(pdev, info); + + info->fix = simplefb_fix; + info->fix.smem_start = mem->start; + info->fix.smem_len = resource_size(mem); + info->fix.line_length = params.stride; + + info->var = simplefb_var; + info->var.xres = params.width; + info->var.yres = params.height; + info->var.xres_virtual = params.width; + info->var.yres_virtual = params.height; + info->var.bits_per_pixel = params.format->bits_per_pixel; + info->var.red = params.format->red; + info->var.green = params.format->green; + info->var.blue = params.format->blue; + info->var.transp = params.format->transp; + + info->fbops = &simplefb_ops; + info->flags = FBINFO_DEFAULT; + info->screen_base = devm_ioremap(&pdev->dev, info->fix.smem_start, + info->fix.smem_len); + if (!info->screen_base) { + framebuffer_release(info); + return -ENODEV; + } + info->pseudo_palette = (void *)(info + 1); + + ret = register_framebuffer(info); + if (ret < 0) { + dev_err(&pdev->dev, "Unable to register simplefb: %d\n", ret); + framebuffer_release(info); + return ret; + } + + dev_info(&pdev->dev, "fb%d: simplefb registered!\n", info->node); + + return 0; +} + +static int simplefb_remove(struct platform_device *pdev) +{ + struct fb_info *info = platform_get_drvdata(pdev); + + unregister_framebuffer(info); + framebuffer_release(info); + + return 0; +} + +static const struct of_device_id simplefb_of_match[] = { + { .compatible = "simple-framebuffer", }, + { }, +}; +MODULE_DEVICE_TABLE(of, simplefb_of_match); + +static struct platform_driver simplefb_driver = { + .driver = { + .name = "simple-framebuffer", + .owner = THIS_MODULE, + .of_match_table = simplefb_of_match, + }, + .probe = simplefb_probe, + .remove = simplefb_remove, +}; +module_platform_driver(simplefb_driver); + +MODULE_AUTHOR("Stephen Warren "); +MODULE_DESCRIPTION("Simple framebuffer driver"); +MODULE_LICENSE("GPL v2"); -- cgit v1.2.3 From e5ee7305ae03e43dbe2b0e346232975f793ad0eb Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Fri, 24 May 2013 15:55:27 -0700 Subject: fbdev: FB_GOLDFISH should depend on HAS_DMA If NO_DMA=y: drivers/built-in.o: In function `goldfish_fb_remove': drivers/video/goldfishfb.c:301: undefined reference to `dma_free_coherent' drivers/built-in.o: In function `goldfish_fb_probe': drivers/video/goldfishfb.c:247: undefined reference to `dma_alloc_coherent' drivers/video/goldfishfb.c:280: undefined reference to `dma_free_coherent' Signed-off-by: Geert Uytterhoeven Cc: Florian Tobias Schandinat Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/video/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/video') diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 62460561077e..2e937bdace6f 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -2199,7 +2199,7 @@ config FB_XILINX config FB_GOLDFISH tristate "Goldfish Framebuffer" - depends on FB + depends on FB && HAS_DMA select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT -- cgit v1.2.3