Merge branch 'fbdev/edid'

3 files changed, 134 insertions, 0 deletions

diff --git a/drivers/video/fbmon.c b/drivers/video/fbmon.c
index 563a98b88e9b..4f57485f8c54 100644
--- a/drivers/video/fbmon.c
+++ b/drivers/video/fbmon.c
@@ -973,6 +973,90 @@ void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs)
         DPRINTK("========================================\n");
 }
 
+/**
+ * fb_edid_add_monspecs() - add monitor video modes from E-EDID data
+ * @edid:       128 byte array with an E-EDID block
+ * @spacs:      monitor specs to be extended
+ */
+void fb_edid_add_monspecs(unsigned char *edid, struct fb_monspecs *specs)
+{
+        unsigned char *block;
+        struct fb_videomode *m;
+        int num = 0, i;
+        u8 svd[64], edt[(128 - 4) / DETAILED_TIMING_DESCRIPTION_SIZE];
+        u8 pos = 4, svd_n = 0;
+
+        if (!edid)
+                return;
+
+        if (!edid_checksum(edid))
+                return;
+
+        if (edid[0] != 0x2 ||
+            edid[2] < 4 || edid[2] > 128 - DETAILED_TIMING_DESCRIPTION_SIZE)
+                return;
+
+        DPRINTK("  Short Video Descriptors\n");
+
+        while (pos < edid[2]) {
+                u8 len = edid[pos] & 0x1f, type = (edid[pos] >> 5) & 7;
+                pr_debug("Data block %u of %u bytes\n", type, len);
+                if (type == 2)
+                        for (i = pos; i < pos + len; i++) {
+                                u8 idx = edid[pos + i] & 0x7f;
+                                svd[svd_n++] = idx;
+                                pr_debug("N%sative mode #%d\n",
+                                         edid[pos + i] & 0x80 ? "" : "on-n", idx);
+                        }
+                pos += len + 1;
+        }
+
+        block = edid + edid[2];
+
+        DPRINTK("  Extended Detailed Timings\n");
+
+        for (i = 0; i < (128 - edid[2]) / DETAILED_TIMING_DESCRIPTION_SIZE;
+             i++, block += DETAILED_TIMING_DESCRIPTION_SIZE)
+                if (PIXEL_CLOCK)
+                        edt[num++] = block - edid;
+
+        /* Yikes, EDID data is totally useless */
+        if (!(num + svd_n))
+                return;
+
+        m = kzalloc((specs->modedb_len + num + svd_n) *
+                       sizeof(struct fb_videomode), GFP_KERNEL);
+
+        if (!m)
+                return;
+
+        memcpy(m, specs->modedb, specs->modedb_len * sizeof(struct fb_videomode));
+
+        for (i = specs->modedb_len; i < specs->modedb_len + num; i++) {
+                get_detailed_timing(edid + edt[i - specs->modedb_len], &m[i]);
+                if (i == specs->modedb_len)
+                        m[i].flag |= FB_MODE_IS_FIRST;
+                pr_debug("Adding %ux%u@%u\n", m[i].xres, m[i].yres, m[i].refresh);
+        }
+
+        for (i = specs->modedb_len + num; i < specs->modedb_len + num + svd_n; i++) {
+                int idx = svd[i - specs->modedb_len - num];
+                if (!idx || idx > 63) {
+                        pr_warning("Reserved SVD code %d\n", idx);
+                } else if (idx > ARRAY_SIZE(cea_modes) || !cea_modes[idx].xres) {
+                        pr_warning("Unimplemented SVD code %d\n", idx);
+                } else {
+                        memcpy(&m[i], cea_modes + idx, sizeof(m[i]));
+                        pr_debug("Adding SVD #%d: %ux%u@%u\n", idx,
+                                 m[i].xres, m[i].yres, m[i].refresh);
+                }
+        }
+
+        kfree(specs->modedb);
+        specs->modedb = m;
+        specs->modedb_len = specs->modedb_len + num + svd_n;
+}
+
 /*
  * VESA Generalized Timing Formula (GTF)
  */
@@ -1289,6 +1373,9 @@ void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs)
 {
         specs = NULL;
 }
+void fb_edid_add_monspecs(unsigned char *edid, struct fb_monspecs *specs)
+{
+}
 void fb_destroy_modedb(struct fb_videomode *modedb)
 {
 }
@@ -1396,6 +1483,7 @@ EXPORT_SYMBOL(fb_firmware_edid);
 
 EXPORT_SYMBOL(fb_parse_edid);
 EXPORT_SYMBOL(fb_edid_to_monspecs);
+EXPORT_SYMBOL(fb_edid_add_monspecs);
 EXPORT_SYMBOL(fb_get_mode);
 EXPORT_SYMBOL(fb_validate_mode);
 EXPORT_SYMBOL(fb_destroy_modedb);
diff --git a/drivers/video/modedb.c b/drivers/video/modedb.c
index 0a4dbdc1693a..9a0ae6ca5427 100644
--- a/drivers/video/modedb.c
+++ b/drivers/video/modedb.c
@@ -278,6 +278,49 @@ static const struct fb_videomode modedb[] = {
 };
 
 #ifdef CONFIG_FB_MODE_HELPERS
+const struct fb_videomode cea_modes[64] = {
+        /* #1: 640x480p@59.94/60Hz */
+        [1] = {
+                NULL, 60, 640, 480, 39722, 48, 16, 33, 10, 96, 2, 0, FB_VMODE_NONINTERLACED, 0,
+        },
+        /* #3: 720x480p@59.94/60Hz */
+        [3] = {
+                NULL, 60, 720, 480, 37037, 60, 16, 30, 9, 62, 6, 0, FB_VMODE_NONINTERLACED, 0,
+        },
+        /* #5: 1920x1080i@59.94/60Hz */
+        [5] = {
+                NULL, 60, 1920, 1080, 13763, 148, 88, 15, 2, 44, 5, 0, FB_VMODE_INTERLACED, 0,
+        },
+        /* #7: 720(1440)x480iH@59.94/60Hz */
+        [7] = {
+                NULL, 60, 1440, 480, 18554/*37108*/, 114, 38, 15, 4, 124, 3, 0, FB_VMODE_INTERLACED, 0,
+        },
+        /* #9: 720(1440)x240pH@59.94/60Hz */
+        [9] = {
+                NULL, 60, 1440, 240, 18554, 114, 38, 16, 4, 124, 3, 0, FB_VMODE_NONINTERLACED, 0,
+        },
+        /* #18: 720x576pH@50Hz */
+        [18] = {
+                NULL, 50, 720, 576, 37037, 68, 12, 39, 5, 64, 5, 0, FB_VMODE_NONINTERLACED, 0,
+        },
+        /* #19: 1280x720p@50Hz */
+        [19] = {
+                NULL, 50, 1280, 720, 13468, 220, 440, 20, 5, 40, 5, 0, FB_VMODE_NONINTERLACED, 0,
+        },
+        /* #20: 1920x1080i@50Hz */
+        [20] = {
+                NULL, 50, 1920, 1080, 13480, 148, 528, 15, 5, 528, 5, 0, FB_VMODE_INTERLACED, 0,
+        },
+        /* #32: 1920x1080p@23.98/24Hz */
+        [32] = {
+                NULL, 24, 1920, 1080, 13468, 148, 638, 36, 4, 44, 5, 0, FB_VMODE_NONINTERLACED, 0,
+        },
+        /* #35: (2880)x480p4x@59.94/60Hz */
+        [35] = {
+                NULL, 50, 2880, 480, 11100, 240, 64, 30, 9, 248, 6, 0, FB_VMODE_NONINTERLACED, 0,
+        },
+};
+
 const struct fb_videomode vesa_modes[] = {
         /* 0 640x350-85 VESA */
         { NULL, 85, 640, 350, 31746,  96, 32, 60, 32, 64, 3,
diff --git a/include/linux/fb.h b/include/linux/fb.h
index 7fca3dc4e475..e154a79b8322 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -1092,6 +1092,8 @@ extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);
 extern const unsigned char *fb_firmware_edid(struct device *device);
 extern void fb_edid_to_monspecs(unsigned char *edid,
                                 struct fb_monspecs *specs);
+extern void fb_edid_add_monspecs(unsigned char *edid,
+                                 struct fb_monspecs *specs);
 extern void fb_destroy_modedb(struct fb_videomode *modedb);
 extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
 extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
@@ -1149,6 +1151,7 @@ struct fb_videomode {
 
 extern const char *fb_mode_option;
 extern const struct fb_videomode vesa_modes[];
+extern const struct fb_videomode cea_modes[64];
 
 struct fb_modelist {
         struct list_head list;