viafb: Automatic OLPC XO-1.5 configuration

Currently, a long set of viafb options are needed to get the XO-1.5
laptop to output video (there is only 1 configuration that works, that
can't really be autodetected).

This patch automatically detects and configures viafb for the XO-1.5
laptop, meaning all that is required for working display is that
viafb is loaded.

Signed-off-by: Daniel Drake <dsd@laptop.org>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>

1 files changed, 30 insertions, 9 deletions

diff --git a/drivers/video/via/viafbdev.c b/drivers/video/via/viafbdev.c
index eace9a4257f4..3114a8755c13 100644
--- a/drivers/video/via/viafbdev.c
+++ b/drivers/video/via/viafbdev.c
@@ -24,6 +24,7 @@
 #include <linux/slab.h>
 #include <linux/stat.h>
 #include <linux/via-core.h>
+#include <asm/olpc.h>
 
 #define _MASTER_FILE
 #include "global.h"
@@ -1011,8 +1012,13 @@ static int __init parse_active_dev(void)
         /*    Note: The previous of active_dev is primary device,
            and the following is secondary device. */
         if (!viafb_active_dev) {
-                viafb_CRT_ON = STATE_ON;
-                viafb_SAMM_ON = STATE_OFF;
+                if (machine_is_olpc()) { /* LCD only */
+                        viafb_LCD_ON = STATE_ON;
+                        viafb_SAMM_ON = STATE_OFF;
+                } else {
+                        viafb_CRT_ON = STATE_ON;
+                        viafb_SAMM_ON = STATE_OFF;
+                }
         } else if (!strcmp(viafb_active_dev, "CRT+DVI")) {
                 /* CRT+DVI */
                 viafb_CRT_ON = STATE_ON;
@@ -1665,8 +1671,13 @@ static int parse_mode(const char *str, u32 *xres, u32 *yres)
         char *ptr;
 
         if (!str) {
-                *xres = 640;
-                *yres = 480;
+                if (machine_is_olpc()) {
+                        *xres = 1200;
+                        *yres = 900;
+                } else {
+                        *xres = 640;
+                        *yres = 480;
+                }
                 return 0;
         }
 
@@ -1922,11 +1933,16 @@ void __devexit via_fb_pci_remove(struct pci_dev *pdev)
 }
 
 #ifndef MODULE
-static int __init viafb_setup(char *options)
+static int __init viafb_setup(void)
 {
         char *this_opt;
+        char *options;
+
         DEBUG_MSG(KERN_INFO "viafb_setup!\n");
 
+        if (fb_get_options("viafb", &options))
+                return -ENODEV;
+
         if (!options || !*options)
                 return 0;
 
@@ -2000,11 +2016,16 @@ static int __init viafb_setup(char *options)
 int __init viafb_init(void)
 {
         u32 dummy_x, dummy_y;
+        int r;
+
+        if (machine_is_olpc())
+                /* Apply XO-1.5-specific configuration. */
+                viafb_lcd_panel_id = 23;
+
 #ifndef MODULE
-        char *option = NULL;
-        if (fb_get_options("viafb", &option))
-                return -ENODEV;
-        viafb_setup(option);
+        r = viafb_setup();
+        if (r < 0)
+                return r;
 #endif
         if (parse_mode(viafb_mode, &dummy_x, &dummy_y)
                 || !viafb_get_mode(dummy_x, dummy_y)