1 files changed, 48 insertions, 0 deletions

diff --git a/drivers/video/via/viafbdev.c b/drivers/video/via/viafbdev.c
index 164c6ea603d2..50f486d9b087 100644
--- a/drivers/video/via/viafbdev.c
+++ b/drivers/video/via/viafbdev.c
@@ -56,6 +56,31 @@ static int viafb_pan_display(struct fb_var_screeninfo *var,
 
 static struct fb_ops viafb_ops;
 
+/* supported output devices on each IGP
+ * only CX700, VX800, VX855 were documented
+ * VIA_CRT should be everywhere
+ * VIA_6C can be onle pre-CX700 (probably only on CLE266) as 6C is used for PLL
+ * source selection on CX700 and later
+ * K400 seems to support VIA_96, VIA_DVP1, VIA_LVDS{1,2} as in viamode.c
+ */
+static const u32 supported_odev_map[] = {
+        [UNICHROME_CLE266]      = VIA_CRT | VIA_6C | VIA_93,
+        [UNICHROME_K400]        = VIA_CRT | VIA_96 | VIA_DVP1 | VIA_LVDS1
+                                | VIA_LVDS2,
+        [UNICHROME_K800]        = VIA_CRT | VIA_96 | VIA_DVP1 | VIA_LVDS1
+                                | VIA_LVDS2,
+        [UNICHROME_PM800]       = VIA_CRT | VIA_96 | VIA_DVP1 | VIA_LVDS1
+                                | VIA_LVDS2,
+        [UNICHROME_CN700]       = VIA_CRT | VIA_96 | VIA_DVP1 | VIA_LVDS1
+                                | VIA_LVDS2,
+        [UNICHROME_CX700]       = VIA_CRT | VIA_DVP1 | VIA_LVDS1 | VIA_LVDS2,
+        [UNICHROME_CN750]       = VIA_CRT | VIA_DVP1 | VIA_LVDS1 | VIA_LVDS2,
+        [UNICHROME_K8M890]      = VIA_CRT | VIA_DVP1 | VIA_LVDS1 | VIA_LVDS2,
+        [UNICHROME_P4M890]      = VIA_CRT | VIA_DVP1 | VIA_LVDS1 | VIA_LVDS2,
+        [UNICHROME_P4M900]      = VIA_CRT | VIA_DVP1 | VIA_LVDS1 | VIA_LVDS2,
+        [UNICHROME_VX800]       = VIA_CRT | VIA_DVP1 | VIA_LVDS1 | VIA_LVDS2,
+        [UNICHROME_VX855]       = VIA_CRT | VIA_DVP1 | VIA_LVDS1 | VIA_LVDS2,
+};
 
 static void viafb_fill_var_color_info(struct fb_var_screeninfo *var, u8 depth)
 {
@@ -1433,6 +1458,26 @@ static const struct file_operations viafb_vt1636_proc_fops = {
 
 #endif /* CONFIG_FB_VIA_DIRECT_PROCFS */
 
+static int viafb_sup_odev_proc_show(struct seq_file *m, void *v)
+{
+        via_odev_to_seq(m, supported_odev_map[
+                viaparinfo->shared->chip_info.gfx_chip_name]);
+        return 0;
+}
+
+static int viafb_sup_odev_proc_open(struct inode *inode, struct file *file)
+{
+        return single_open(file, viafb_sup_odev_proc_show, NULL);
+}
+
+static const struct file_operations viafb_sup_odev_proc_fops = {
+        .owner          = THIS_MODULE,
+        .open           = viafb_sup_odev_proc_open,
+        .read           = seq_read,
+        .llseek         = seq_lseek,
+        .release        = single_release,
+};
+
 static ssize_t odev_update(const char __user *buffer, size_t count, u32 *odev)
 {
         char buf[64], *ptr = buf;
@@ -1561,6 +1606,8 @@ static void viafb_init_proc(struct viafb_shared *shared)
                                 &viafb_vt1636_proc_fops);
 #endif /* CONFIG_FB_VIA_DIRECT_PROCFS */
 
+                proc_create("supported_output_devices", 0, viafb_entry,
+                        &viafb_sup_odev_proc_fops);
                 iga1_entry = proc_mkdir("iga1", viafb_entry);
                 shared->iga1_proc_entry = iga1_entry;
                 proc_create("output_devices", 0, iga1_entry,
@@ -1584,6 +1631,7 @@ static void viafb_remove_proc(struct viafb_shared *shared)
         remove_proc_entry("iga2", viafb_entry);
         remove_proc_entry("output_devices", iga1_entry);
         remove_proc_entry("iga1", viafb_entry);
+        remove_proc_entry("supported_output_devices", viafb_entry);
 
 #ifdef CONFIG_FB_VIA_DIRECT_PROCFS
         remove_proc_entry("dvp0", viafb_entry);/* parent dir */