3 files changed, 81 insertions, 6 deletions

diff --git a/Documentation/powerpc/dts-bindings/fsl/diu.txt b/Documentation/powerpc/dts-bindings/fsl/diu.txt
index 326cddfd7c25..b66cb6d31d69 100644
--- a/Documentation/powerpc/dts-bindings/fsl/diu.txt
+++ b/Documentation/powerpc/dts-bindings/fsl/diu.txt
@@ -11,6 +11,11 @@ Required properties:
 - interrupt-parent : the phandle for the interrupt controller that
   services interrupts for this device.
 
+Optional properties:
+- edid : verbatim EDID data block describing attached display.
+  Data from the detailed timing descriptor will be used to
+  program the display controller.
+
 Example (MPC8610HPCD):
         display@2c000 {
                 compatible = "fsl,diu";
@@ -25,4 +30,5 @@ Example for MPC5121:
                 reg = <0x2100 0x100>;
                 interrupts = <64 0x8>;
                 interrupt-parent = <&ipic>;
+                edid = [edid-data];
         };
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 3d94a1471724..114aeb0d9971 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -1871,6 +1871,7 @@ config FB_MBX_DEBUG
 config FB_FSL_DIU
         tristate "Freescale DIU framebuffer support"
         depends on FB && FSL_SOC
+        select FB_MODE_HELPERS
         select FB_CFB_FILLRECT
         select FB_CFB_COPYAREA
         select FB_CFB_IMAGEBLIT
diff --git a/drivers/video/fsl-diu-fb.c b/drivers/video/fsl-diu-fb.c
index db3e360e6aad..e38ad2224540 100644
--- a/drivers/video/fsl-diu-fb.c
+++ b/drivers/video/fsl-diu-fb.c
@@ -35,6 +35,7 @@
 
 #include <sysdev/fsl_soc.h>
 #include <linux/fsl-diu-fb.h>
+#include "edid.h"
 
 /*
  * These parameters give default parameters
@@ -217,6 +218,7 @@ struct mfb_info {
         int x_aoi_d;            /* aoi display x offset to physical screen */
         int y_aoi_d;            /* aoi display y offset to physical screen */
         struct fsl_diu_data *parent;
+        u8 *edid_data;
 };
 
 
@@ -1185,18 +1187,30 @@ static int __devinit install_fb(struct fb_info *info)
         int rc;
         struct mfb_info *mfbi = info->par;
         const char *aoi_mode, *init_aoi_mode = "320x240";
+        struct fb_videomode *db = fsl_diu_mode_db;
+        unsigned int dbsize = ARRAY_SIZE(fsl_diu_mode_db);
+        int has_default_mode = 1;
 
         if (init_fbinfo(info))
                 return -EINVAL;
 
-        if (mfbi->index == 0)   /* plane 0 */
+        if (mfbi->index == 0) { /* plane 0 */
+                if (mfbi->edid_data) {
+                        /* Now build modedb from EDID */
+                        fb_edid_to_monspecs(mfbi->edid_data, &info->monspecs);
+                        fb_videomode_to_modelist(info->monspecs.modedb,
+                                                 info->monspecs.modedb_len,
+                                                 &info->modelist);
+                        db = info->monspecs.modedb;
+                        dbsize = info->monspecs.modedb_len;
+                }
                 aoi_mode = fb_mode;
-        else
+        } else {
                 aoi_mode = init_aoi_mode;
+        }
         pr_debug("mode used = %s\n", aoi_mode);
-        rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db,
-             ARRAY_SIZE(fsl_diu_mode_db), &fsl_diu_default_mode, default_bpp);
-
+        rc = fb_find_mode(&info->var, info, aoi_mode, db, dbsize,
+                          &fsl_diu_default_mode, default_bpp);
         switch (rc) {
         case 1:
                 pr_debug("using mode specified in @mode\n");
@@ -1214,10 +1228,50 @@ static int __devinit install_fb(struct fb_info *info)
         default:
                 pr_debug("rc = %d\n", rc);
                 pr_debug("failed to find mode\n");
-                return -EINVAL;
+                /*
+                 * For plane 0 we continue and look into
+                 * driver's internal modedb.
+                 */
+                if (mfbi->index == 0 && mfbi->edid_data)
+                        has_default_mode = 0;
+                else
+                        return -EINVAL;
                 break;
         }
 
+        if (!has_default_mode) {
+                rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db,
+                                  ARRAY_SIZE(fsl_diu_mode_db),
+                                  &fsl_diu_default_mode,
+                                  default_bpp);
+                if (rc > 0 && rc < 5)
+                        has_default_mode = 1;
+        }
+
+        /* Still not found, use preferred mode from database if any */
+        if (!has_default_mode && info->monspecs.modedb) {
+                struct fb_monspecs *specs = &info->monspecs;
+                struct fb_videomode *modedb = &specs->modedb[0];
+
+                /*
+                 * Get preferred timing. If not found,
+                 * first mode in database will be used.
+                 */
+                if (specs->misc & FB_MISC_1ST_DETAIL) {
+                        int i;
+
+                        for (i = 0; i < specs->modedb_len; i++) {
+                                if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
+                                        modedb = &specs->modedb[i];
+                                        break;
+                                }
+                        }
+                }
+
+                info->var.bits_per_pixel = default_bpp;
+                fb_videomode_to_var(&info->var, modedb);
+        }
+
         pr_debug("xres_virtual %d\n", info->var.xres_virtual);
         pr_debug("bits_per_pixel %d\n", info->var.bits_per_pixel);
 
@@ -1256,6 +1310,9 @@ static void uninstall_fb(struct fb_info *info)
         if (!mfbi->registered)
                 return;
 
+        if (mfbi->index == 0)
+                kfree(mfbi->edid_data);
+
         unregister_framebuffer(info);
         unmap_video_memory(info);
         if (&info->cmap)
@@ -1456,6 +1513,17 @@ static int __devinit fsl_diu_probe(struct of_device *ofdev,
                 mfbi = machine_data->fsl_diu_info[i]->par;
                 memcpy(mfbi, &mfb_template[i], sizeof(struct mfb_info));
                 mfbi->parent = machine_data;
+
+                if (mfbi->index == 0) {
+                        const u8 *prop;
+                        int len;
+
+                        /* Get EDID */
+                        prop = of_get_property(np, "edid", &len);
+                        if (prop && len == EDID_LENGTH)
+                                mfbi->edid_data = kmemdup(prop, EDID_LENGTH,
+                                                          GFP_KERNEL);
+                }
         }
 
         ret = of_address_to_resource(np, 0, &res);