From 343684ffb793a3c371579b7bbc16724713ee5ac7 Mon Sep 17 00:00:00 2001 From: Sascha Hauer Date: Thu, 19 Mar 2009 08:25:41 +0100 Subject: imxfb: Add support for multiple displays Signed-off-by: Sascha Hauer --- drivers/video/imxfb.c | 191 +++++++++++++++++++++++++++++++------------------- 1 file changed, 120 insertions(+), 71 deletions(-) (limited to 'drivers/video/imxfb.c') diff --git a/drivers/video/imxfb.c b/drivers/video/imxfb.c index 330857a8b31..30ae3022f63 100644 --- a/drivers/video/imxfb.c +++ b/drivers/video/imxfb.c @@ -130,6 +130,10 @@ #define LCDISR_EOF (1<<1) #define LCDISR_BOF (1<<0) +/* 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. @@ -146,10 +150,6 @@ struct imxfb_info { void __iomem *regs; struct clk *clk; - u_int max_bpp; - u_int max_xres; - u_int max_yres; - /* * These are the addresses we mapped * the framebuffer memory region to. @@ -173,6 +173,9 @@ struct imxfb_info { cmap_static:1, unused:30; + struct imx_fb_videomode *mode; + int num_modes; + void (*lcd_power)(int); void (*backlight_power)(int); }; @@ -299,6 +302,18 @@ static int imxfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue, return ret; } +static const struct imx_fb_videomode *imxfb_find_mode(struct imxfb_info *fbi) +{ + struct imx_fb_videomode *m; + int i; + + for (i = 0, m = &fbi->mode[0]; i < fbi->num_modes; i++, m++) { + if (!strcmp(m->mode.name, fb_mode)) + return m; + } + return NULL; +} + /* * imxfb_check_var(): * Round up in the following order: bits_per_pixel, xres, @@ -309,35 +324,81 @@ static int imxfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) { struct imxfb_info *fbi = info->par; struct imxfb_rgb *rgb; + const struct imx_fb_videomode *imxfb_mode; + unsigned long lcd_clk; + unsigned long long tmp; + u32 pcr = 0; if (var->xres < MIN_XRES) var->xres = MIN_XRES; if (var->yres < MIN_YRES) var->yres = MIN_YRES; - if (var->xres > fbi->max_xres) - var->xres = fbi->max_xres; - if (var->yres > fbi->max_yres) - var->yres = fbi->max_yres; - var->xres_virtual = max(var->xres_virtual, var->xres); - var->yres_virtual = max(var->yres_virtual, var->yres); + + imxfb_mode = imxfb_find_mode(fbi); + if (!imxfb_mode) + return -EINVAL; + + var->xres = imxfb_mode->mode.xres; + var->yres = imxfb_mode->mode.yres; + var->bits_per_pixel = imxfb_mode->bpp; + var->pixclock = imxfb_mode->mode.pixclock; + var->hsync_len = imxfb_mode->mode.hsync_len; + var->left_margin = imxfb_mode->mode.left_margin; + var->right_margin = imxfb_mode->mode.right_margin; + var->vsync_len = imxfb_mode->mode.vsync_len; + var->upper_margin = imxfb_mode->mode.upper_margin; + var->lower_margin = imxfb_mode->mode.lower_margin; + var->sync = imxfb_mode->mode.sync; + var->xres_virtual = max(var->xres_virtual, var->xres); + var->yres_virtual = max(var->yres_virtual, var->yres); pr_debug("var->bits_per_pixel=%d\n", var->bits_per_pixel); + + lcd_clk = clk_get_rate(fbi->clk); + + tmp = var->pixclock * (unsigned long long)lcd_clk; + + do_div(tmp, 1000000); + + if (do_div(tmp, 1000000) > 500000) + tmp++; + + pcr = (unsigned int)tmp; + + if (--pcr > 0x3F) { + pcr = 0x3F; + printk(KERN_WARNING "Must limit pixel clock to %luHz\n", + lcd_clk / pcr); + } + switch (var->bits_per_pixel) { case 32: + pcr |= PCR_BPIX_18; rgb = &def_rgb_18; break; case 16: default: - if (fbi->pcr & PCR_TFT) + if (cpu_is_mx1()) + pcr |= PCR_BPIX_12; + else + pcr |= PCR_BPIX_16; + + if (imxfb_mode->pcr & PCR_TFT) rgb = &def_rgb_16_tft; else rgb = &def_rgb_16_stn; break; case 8: + pcr |= PCR_BPIX_8; rgb = &def_rgb_8; break; } + /* add sync polarities */ + pcr |= imxfb_mode->pcr & ~(0x3f | (7 << 25)); + + fbi->pcr = pcr; + /* * Copy the RGB parameters for this display * from the machine specific parameters. @@ -394,10 +455,6 @@ static void imxfb_enable_controller(struct imxfb_info *fbi) writel(fbi->screen_dma, fbi->regs + LCDC_SSA); - /* physical screen start address */ - writel(VPW_VPW(fbi->max_xres * fbi->max_bpp / 8 / 4), - fbi->regs + LCDC_VPW); - /* panning offset 0 (0 pixel offset) */ writel(0x00000000, fbi->regs + LCDC_POS); @@ -469,8 +526,6 @@ static struct fb_ops imxfb_ops = { static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *info) { struct imxfb_info *fbi = info->par; - unsigned int pcr, lcd_clk; - unsigned long long tmp; pr_debug("var: xres=%d hslen=%d lm=%d rm=%d\n", var->xres, var->hsync_len, @@ -506,6 +561,10 @@ static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *inf info->fix.id, var->lower_margin); #endif + /* physical screen start address */ + writel(VPW_VPW(var->xres * var->bits_per_pixel / 8 / 4), + fbi->regs + LCDC_VPW); + writel(HCR_H_WIDTH(var->hsync_len - 1) | HCR_H_WAIT_1(var->right_margin - 1) | HCR_H_WAIT_2(var->left_margin - 3), @@ -519,38 +578,7 @@ static int imxfb_activate_var(struct fb_var_screeninfo *var, struct fb_info *inf writel(SIZE_XMAX(var->xres) | SIZE_YMAX(var->yres), fbi->regs + LCDC_SIZE); - lcd_clk = clk_get_rate(fbi->clk); - tmp = var->pixclock * (unsigned long long)lcd_clk; - do_div(tmp, 1000000); - if (do_div(tmp, 1000000) > 500000) - tmp++; - pcr = (unsigned int)tmp; - if (--pcr > 0x3F) { - pcr = 0x3F; - printk(KERN_WARNING "Must limit pixel clock to %uHz\n", - lcd_clk / pcr); - } - - switch (var->bits_per_pixel) { - case 32: - pcr |= PCR_BPIX_18; - break; - case 16: - default: - if (cpu_is_mx1()) - pcr |= PCR_BPIX_12; - else - pcr |= PCR_BPIX_16; - break; - case 8: - pcr |= PCR_BPIX_8; - break; - } - - /* add sync polarities */ - pcr |= fbi->pcr & ~(0x3f | (7 << 25)); - - writel(pcr, fbi->regs + LCDC_PCR); + writel(fbi->pcr, fbi->regs + LCDC_PCR); writel(fbi->pwmr, fbi->regs + LCDC_PWMR); writel(fbi->lscr1, fbi->regs + LCDC_LSCR1); writel(fbi->dmacr, fbi->regs + LCDC_DMACR); @@ -592,6 +620,8 @@ static int __init 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; pr_debug("%s\n",__func__); @@ -620,35 +650,18 @@ static int __init imxfb_init_fbinfo(struct platform_device *pdev) info->fbops = &imxfb_ops; info->flags = FBINFO_FLAG_DEFAULT | FBINFO_READS_FAST; - - fbi->max_xres = pdata->xres; - info->var.xres = pdata->xres; - info->var.xres_virtual = pdata->xres; - fbi->max_yres = pdata->yres; - info->var.yres = pdata->yres; - info->var.yres_virtual = pdata->yres; - fbi->max_bpp = pdata->bpp; - info->var.bits_per_pixel = pdata->bpp; - info->var.nonstd = pdata->nonstd; - info->var.pixclock = pdata->pixclock; - info->var.hsync_len = pdata->hsync_len; - info->var.left_margin = pdata->left_margin; - info->var.right_margin = pdata->right_margin; - info->var.vsync_len = pdata->vsync_len; - info->var.upper_margin = pdata->upper_margin; - info->var.lower_margin = pdata->lower_margin; - info->var.sync = pdata->sync; info->var.grayscale = pdata->cmap_greyscale; fbi->cmap_inverse = pdata->cmap_inverse; fbi->cmap_static = pdata->cmap_static; - fbi->pcr = pdata->pcr; fbi->lscr1 = pdata->lscr1; fbi->dmacr = pdata->dmacr; fbi->pwmr = pdata->pwmr; fbi->lcd_power = pdata->lcd_power; fbi->backlight_power = pdata->backlight_power; - info->fix.smem_len = fbi->max_xres * fbi->max_yres * - fbi->max_bpp / 8; + + 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); return 0; } @@ -659,7 +672,7 @@ static int __init imxfb_probe(struct platform_device *pdev) struct fb_info *info; struct imx_fb_platform_data *pdata; struct resource *res; - int ret; + int ret, i; dev_info(&pdev->dev, "i.MX Framebuffer driver\n"); @@ -679,6 +692,9 @@ 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); @@ -736,6 +752,13 @@ static int __init imxfb_probe(struct platform_device *pdev) 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); + /* * This makes sure that our colour bitfield * descriptors are correctly initialised. @@ -828,8 +851,34 @@ static struct platform_driver imxfb_driver = { }, }; +static int imxfb_setup(void) +{ +#ifndef MODULE + char *opt, *options = NULL; + + if (fb_get_options("imxfb", &options)) + return -ENODEV; + + if (!options || !*options) + return 0; + + while ((opt = strsep(&options, ",")) != NULL) { + if (!*opt) + continue; + else + fb_mode = opt; + } +#endif + return 0; +} + int __init imxfb_init(void) { + int ret = imxfb_setup(); + + if (ret < 0) + return ret; + return platform_driver_probe(&imxfb_driver, imxfb_probe); } -- cgit v1.2.3