diff options
| -rw-r--r-- | Documentation/devicetree/bindings/video/fsl,imx-fb.txt | 51 | ||||
| -rw-r--r-- | drivers/video/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/video/imxfb.c | 194 |
3 files changed, 212 insertions, 35 deletions
diff --git a/Documentation/devicetree/bindings/video/fsl,imx-fb.txt b/Documentation/devicetree/bindings/video/fsl,imx-fb.txt new file mode 100644 index 000000000000..46da08db186a --- /dev/null +++ b/Documentation/devicetree/bindings/video/fsl,imx-fb.txt @@ -0,0 +1,51 @@ +Freescale imx21 Framebuffer + +This framebuffer driver supports devices imx1, imx21, imx25, and imx27. + +Required properties: +- compatible : "fsl,<chip>-fb", chip should be imx1 or imx21 +- reg : Should contain 1 register ranges(address and length) +- interrupts : One interrupt of the fb dev + +Required nodes: +- display: Phandle to a display node as described in + Documentation/devicetree/bindings/video/display-timing.txt + Additional, the display node has to define properties: + - bits-per-pixel: Bits per pixel + - fsl,pcr: LCDC PCR value + +Optional properties: +- fsl,dmacr: DMA Control Register value. This is optional. By default, the + register is not modified as recommended by the datasheet. +- fsl,lscr1: LCDC Sharp Configuration Register value. + +Example: + + imxfb: fb@10021000 { + compatible = "fsl,imx21-fb"; + interrupts = <61>; + reg = <0x10021000 0x1000>; + display = <&display0>; + }; + + ... + + display0: display0 { + model = "Primeview-PD050VL1"; + native-mode = <&timing_disp0>; + bits-per-pixel = <16>; + fsl,pcr = <0xf0c88080>; /* non-standard but required */ + display-timings { + timing_disp0: 640x480 { + hactive = <640>; + vactive = <480>; + hback-porch = <112>; + hfront-porch = <36>; + hsync-len = <32>; + vback-porch = <33>; + vfront-porch = <33>; + vsync-len = <2>; + clock-frequency = <25000000>; + }; + }; + }; diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 2c301f8441e9..4cf1e1dd5621 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -367,6 +367,8 @@ config FB_IMX select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT + select FB_MODE_HELPERS + select VIDEOMODE_HELPERS config FB_CYBER2000 tristate "CyberPro 2000/2010/5000 support" diff --git a/drivers/video/imxfb.c b/drivers/video/imxfb.c index 12af22ba4d92..38733ac2b698 100644 --- a/drivers/video/imxfb.c +++ b/drivers/video/imxfb.c @@ -31,6 +31,12 @@ #include <linux/dma-mapping.h> #include <linux/io.h> #include <linux/math64.h> +#include <linux/of.h> +#include <linux/of_device.h> + +#include <video/of_display_timing.h> +#include <video/of_videomode.h> +#include <video/videomode.h> #include <linux/platform_data/video-imxfb.h> @@ -112,10 +118,11 @@ #define LCDISR_EOF (1<<1) #define LCDISR_BOF (1<<0) +#define IMXFB_LSCR1_DEFAULT 0x00120300 + /* Used fb-mode. Can be set on kernel command line, therefore file-static. */ static const char *fb_mode; - /* * These are the bitfields for each * display depth that we support. @@ -187,6 +194,19 @@ static struct platform_device_id imxfb_devtype[] = { }; MODULE_DEVICE_TABLE(platform, imxfb_devtype); +static struct of_device_id imxfb_of_dev_id[] = { + { + .compatible = "fsl,imx1-fb", + .data = &imxfb_devtype[IMX1_FB], + }, { + .compatible = "fsl,imx21-fb", + .data = &imxfb_devtype[IMX21_FB], + }, { + /* sentinel */ + } +}; +MODULE_DEVICE_TABLE(of, imxfb_of_dev_id); + static inline int is_imx1_fb(struct imxfb_info *fbi) { return fbi->devtype == IMX1_FB; @@ -319,6 +339,9 @@ static const struct imx_fb_videomode *imxfb_find_mode(struct imxfb_info *fbi) struct imx_fb_videomode *m; int i; + if (!fb_mode) + return &fbi->mode[0]; + for (i = 0, m = &fbi->mode[0]; i < fbi->num_modes; i++, m++) { if (!strcmp(m->mode.name, fb_mode)) return m; @@ -474,6 +497,9 @@ static int imxfb_bl_update_status(struct backlight_device *bl) struct imxfb_info *fbi = bl_get_data(bl); int brightness = bl->props.brightness; + if (!fbi->pwmr) + return 0; + if (bl->props.power != FB_BLANK_UNBLANK) brightness = 0; if (bl->props.fb_blank != FB_BLANK_UNBLANK) @@ -684,10 +710,14 @@ static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *inf writel(fbi->pcr, fbi->regs + LCDC_PCR); #ifndef PWMR_BACKLIGHT_AVAILABLE - writel(fbi->pwmr, fbi->regs + LCDC_PWMR); + if (fbi->pwmr) + writel(fbi->pwmr, fbi->regs + LCDC_PWMR); #endif writel(fbi->lscr1, fbi->regs + LCDC_LSCR1); - writel(fbi->dmacr, fbi->regs + LCDC_DMACR); + + /* dmacr = 0 is no valid value, as we need DMA control marks. */ + if (fbi->dmacr) + writel(fbi->dmacr, fbi->regs + LCDC_DMACR); return 0; } @@ -723,13 +753,12 @@ static int imxfb_resume(struct platform_device *dev) #define imxfb_resume NULL #endif -static int __init imxfb_init_fbinfo(struct platform_device *pdev) +static int imxfb_init_fbinfo(struct platform_device *pdev) { struct imx_fb_platform_data *pdata = pdev->dev.platform_data; struct fb_info *info = dev_get_drvdata(&pdev->dev); struct imxfb_info *fbi = info->par; - struct imx_fb_videomode *m; - int i; + struct device_node *np; pr_debug("%s\n",__func__); @@ -760,41 +789,95 @@ static int __init imxfb_init_fbinfo(struct platform_device *pdev) info->fbops = &imxfb_ops; info->flags = FBINFO_FLAG_DEFAULT | FBINFO_READS_FAST; - info->var.grayscale = pdata->cmap_greyscale; - fbi->cmap_inverse = pdata->cmap_inverse; - fbi->cmap_static = pdata->cmap_static; - fbi->lscr1 = pdata->lscr1; - fbi->dmacr = pdata->dmacr; - fbi->pwmr = pdata->pwmr; - fbi->lcd_power = pdata->lcd_power; - fbi->backlight_power = pdata->backlight_power; - - for (i = 0, m = &pdata->mode[0]; i < pdata->num_modes; i++, m++) - info->fix.smem_len = max_t(size_t, info->fix.smem_len, - m->mode.xres * m->mode.yres * m->bpp / 8); + if (pdata) { + info->var.grayscale = pdata->cmap_greyscale; + fbi->cmap_inverse = pdata->cmap_inverse; + fbi->cmap_static = pdata->cmap_static; + fbi->lscr1 = pdata->lscr1; + fbi->dmacr = pdata->dmacr; + fbi->pwmr = pdata->pwmr; + fbi->lcd_power = pdata->lcd_power; + fbi->backlight_power = pdata->backlight_power; + } else { + np = pdev->dev.of_node; + info->var.grayscale = of_property_read_bool(np, + "cmap-greyscale"); + fbi->cmap_inverse = of_property_read_bool(np, "cmap-inverse"); + fbi->cmap_static = of_property_read_bool(np, "cmap-static"); + + fbi->lscr1 = IMXFB_LSCR1_DEFAULT; + of_property_read_u32(np, "fsl,lscr1", &fbi->lscr1); + + of_property_read_u32(np, "fsl,dmacr", &fbi->dmacr); + + /* These two function pointers could be used by some specific + * platforms. */ + fbi->lcd_power = NULL; + fbi->backlight_power = NULL; + } + + return 0; +} + +static int imxfb_of_read_mode(struct device *dev, struct device_node *np, + struct imx_fb_videomode *imxfb_mode) +{ + int ret; + struct fb_videomode *of_mode = &imxfb_mode->mode; + u32 bpp; + u32 pcr; + + ret = of_property_read_string(np, "model", &of_mode->name); + if (ret) + of_mode->name = NULL; + + ret = of_get_fb_videomode(np, of_mode, OF_USE_NATIVE_MODE); + if (ret) { + dev_err(dev, "Failed to get videomode from DT\n"); + return ret; + } + + ret = of_property_read_u32(np, "bits-per-pixel", &bpp); + ret |= of_property_read_u32(np, "fsl,pcr", &pcr); + + if (ret) { + dev_err(dev, "Failed to read bpp and pcr from DT\n"); + return -EINVAL; + } + + if (bpp < 1 || bpp > 255) { + dev_err(dev, "Bits per pixel have to be between 1 and 255\n"); + return -EINVAL; + } + + imxfb_mode->bpp = bpp; + imxfb_mode->pcr = pcr; return 0; } -static int __init imxfb_probe(struct platform_device *pdev) +static int imxfb_probe(struct platform_device *pdev) { struct imxfb_info *fbi; struct fb_info *info; struct imx_fb_platform_data *pdata; struct resource *res; + struct imx_fb_videomode *m; + const struct of_device_id *of_id; int ret, i; + int bytes_per_pixel; dev_info(&pdev->dev, "i.MX Framebuffer driver\n"); + of_id = of_match_device(imxfb_of_dev_id, &pdev->dev); + if (of_id) + pdev->id_entry = of_id->data; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) return -ENODEV; pdata = pdev->dev.platform_data; - if (!pdata) { - dev_err(&pdev->dev,"No platform_data available\n"); - return -ENOMEM; - } info = framebuffer_alloc(sizeof(struct imxfb_info), &pdev->dev); if (!info) @@ -802,15 +885,55 @@ static int __init imxfb_probe(struct platform_device *pdev) fbi = info->par; - if (!fb_mode) - fb_mode = pdata->mode[0].mode.name; - platform_set_drvdata(pdev, info); ret = imxfb_init_fbinfo(pdev); if (ret < 0) goto failed_init; + if (pdata) { + if (!fb_mode) + fb_mode = pdata->mode[0].mode.name; + + fbi->mode = pdata->mode; + fbi->num_modes = pdata->num_modes; + } else { + struct device_node *display_np; + fb_mode = NULL; + + display_np = of_parse_phandle(pdev->dev.of_node, "display", 0); + if (!display_np) { + dev_err(&pdev->dev, "No display defined in devicetree\n"); + ret = -EINVAL; + goto failed_of_parse; + } + + /* + * imxfb does not support more modes, we choose only the native + * mode. + */ + fbi->num_modes = 1; + + fbi->mode = devm_kzalloc(&pdev->dev, + sizeof(struct imx_fb_videomode), GFP_KERNEL); + if (!fbi->mode) { + ret = -ENOMEM; + goto failed_of_parse; + } + + ret = imxfb_of_read_mode(&pdev->dev, display_np, fbi->mode); + if (ret) + goto failed_of_parse; + } + + /* Calculate maximum bytes used per pixel. In most cases this should + * be the same as m->bpp/8 */ + m = &fbi->mode[0]; + bytes_per_pixel = (m->bpp + 7) / 8; + for (i = 0; i < fbi->num_modes; i++, m++) + info->fix.smem_len = max_t(size_t, info->fix.smem_len, + m->mode.xres * m->mode.yres * bytes_per_pixel); + res = request_mem_region(res->start, resource_size(res), DRIVER_NAME); if (!res) { @@ -843,7 +966,8 @@ static int __init imxfb_probe(struct platform_device *pdev) goto failed_ioremap; } - if (!pdata->fixed_screen_cpu) { + /* Seems not being used by anyone, so no support for oftree */ + if (!pdata || !pdata->fixed_screen_cpu) { fbi->map_size = PAGE_ALIGN(info->fix.smem_len); fbi->map_cpu = dma_alloc_writecombine(&pdev->dev, fbi->map_size, &fbi->map_dma, GFP_KERNEL); @@ -868,18 +992,16 @@ static int __init imxfb_probe(struct platform_device *pdev) info->fix.smem_start = fbi->screen_dma; } - if (pdata->init) { + if (pdata && pdata->init) { ret = pdata->init(fbi->pdev); if (ret) goto failed_platform_init; } - fbi->mode = pdata->mode; - fbi->num_modes = pdata->num_modes; INIT_LIST_HEAD(&info->modelist); - for (i = 0; i < pdata->num_modes; i++) - fb_add_videomode(&pdata->mode[i].mode, &info->modelist); + for (i = 0; i < fbi->num_modes; i++) + fb_add_videomode(&fbi->mode[i].mode, &info->modelist); /* * This makes sure that our colour bitfield @@ -909,10 +1031,10 @@ static int __init imxfb_probe(struct platform_device *pdev) failed_register: fb_dealloc_cmap(&info->cmap); failed_cmap: - if (pdata->exit) + if (pdata && pdata->exit) pdata->exit(fbi->pdev); failed_platform_init: - if (!pdata->fixed_screen_cpu) + if (pdata && !pdata->fixed_screen_cpu) dma_free_writecombine(&pdev->dev,fbi->map_size,fbi->map_cpu, fbi->map_dma); failed_map: @@ -921,6 +1043,7 @@ failed_ioremap: failed_getclock: release_mem_region(res->start, resource_size(res)); failed_req: +failed_of_parse: kfree(info->pseudo_palette); failed_init: framebuffer_release(info); @@ -944,7 +1067,7 @@ static int imxfb_remove(struct platform_device *pdev) unregister_framebuffer(info); pdata = pdev->dev.platform_data; - if (pdata->exit) + if (pdata && pdata->exit) pdata->exit(fbi->pdev); fb_dealloc_cmap(&info->cmap); @@ -971,6 +1094,7 @@ static struct platform_driver imxfb_driver = { .shutdown = imxfb_shutdown, .driver = { .name = DRIVER_NAME, + .of_match_table = imxfb_of_dev_id, }, .id_table = imxfb_devtype, }; |
