imxfb: Add support for multiple displays

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 120 insertions, 71 deletions

diff --git a/drivers/video/imxfb.c b/drivers/video/imxfb.c
index 330857a8b318..30ae3022f633 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);
 }