Adding output device detection. Including legacy I2C/DDC code, currently safe
mostly for LCD, think "unknown" device as forced CRT. Detect whole output config
if "viafb_active_dev" unset, or undetected else LCDs in other cases. Also early
viafb_crt_enable if CRT ON - to force CRT DDC detection and multi-out in
textmode as positive side-effect.
Signed-off-by: Dzianis Kahanovich <mahatma@xxxxx>
---
--- a/drivers/video/via/viafbdev.c 2010-12-18 06:42:37.000000000 +0200
+++ b/drivers/video/via/viafbdev.c 2010-12-20 20:17:42.000000000 +0200
@@ -1670,6 +1670,119 @@ static int parse_mode(const char *str, u
return 0;
}
+/* Add devices, detected only via i2c legacy.
+ Really there may be CRT too, but unless I got no CRT DDC - LCD only.
+ Possible CRT may be found as "unknown" to keep CRT ON.
+ Set LCD/DVI/CRT if viafb_active_dev unset. */
+static void viafb_detect_dev(struct viafb_dev *vdev)
+{
+ u8 *edid;
+ struct fb_var_screeninfo var;
+ int i, t, ndev = 0, nlcd = 0, unknown = 0;
+ struct i2c_adapter *adapter;
+ struct lvds_setting_information *inf;
+
+ /* FIXME: viaparinfo1->chip_info looks equal to viaparinfo */
+ if (viaparinfo->chip_info->tmds_chip_info.tmds_chip_name) {
+ ndev++;
+ if (!viafb_active_dev)
+ viafb_DVI_ON = STATE_ON;
+ }
+ if (viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
+ ndev++;
+ nlcd = 1;
+ if (!viafb_active_dev)
+ viafb_LCD_ON = STATE_ON;
+ }
+ if (viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name) {
+ ndev++;
+ nlcd = 2;
+ if (!viafb_active_dev)
+ viafb_LCD2_ON = STATE_ON;
+ }
+ /* enabling CRT in textmode is at least no bad */
+ if (viafb_CRT_ON) {
+ ndev++;
+ viafb_crt_enable();
+ }
+ for (i = 0; i < VIAFB_NUM_PORTS; i++) {
+ t = vdev->port_cfg[i].type;
+ /* detect only i2c ports, undetected in other places */
+ if ((viaparinfo && viaparinfo->chip_info && (
+ (viaparinfo->chip_info->tmds_chip_info.tmds_chip_name &&
+ viaparinfo->chip_info->tmds_chip_info.i2c_port == t) ||
+ (viaparinfo->chip_info->lvds_chip_info.lvds_chip_name &&
+ viaparinfo->chip_info->lvds_chip_info.i2c_port == t) ||
+ (viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name &&
+ viaparinfo->chip_info->lvds_chip_info2.i2c_port == t)
+ )) || (viaparinfo1 && viaparinfo1->chip_info && (
+ (viaparinfo1->chip_info->tmds_chip_info.tmds_chip_name &&
+ viaparinfo1->chip_info->tmds_chip_info.i2c_port == t) ||
+ (viaparinfo1->chip_info->lvds_chip_info.lvds_chip_name &&
+ viaparinfo1->chip_info->lvds_chip_info.i2c_port == t) ||
+ (viaparinfo1->chip_info->lvds_chip_info2.lvds_chip_name &&
+ viaparinfo1->chip_info->lvds_chip_info2.i2c_port == t)
+ )) || !(adapter = viafb_find_i2c_adapter(i)) ||
+ !(edid = fb_ddc_read(adapter)))
+ continue;
+ memset(&var, 0, sizeof(var));
+ if (fb_parse_edid(edid, &var))
+ goto free_edid;
+ printk(KERN_INFO "viafb: %48s\n", adapter->name);
+ inf = NULL;
+ if (!nlcd) {
+ fb_edid_to_monspecs(edid, &viafbinfo->monspecs);
+ if (viafbinfo->monspecs.input & FB_DISP_DDI)
+ inf = viaparinfo->lvds_setting_info;
+ else
+ unknown++;
+ } else if (nlcd > 1) {
+ printk(KERN_ERR "viafb: too many LCD\n");
+ unknown++;
+ } else if (viafb_dual_fb) {
+ fb_edid_to_monspecs(edid, &viafbinfo1->monspecs);
+ if (viafbinfo1->monspecs.input & FB_DISP_DDI)
+ inf = viaparinfo1->lvds_setting_info;
+ else
+ unknown++;
+ } else {
+ fb_edid_to_monspecs(edid, &viafbinfo->monspecs);
+ if (viafbinfo->monspecs.input & FB_DISP_DDI)
+ inf = viaparinfo->lvds_setting_info2;
+ else
+ unknown++;
+ }
+ if (inf) {
+ if (!viafb_active_dev) {
+ if (nlcd)
+ viafb_LCD2_ON = STATE_ON;
+ else
+ viafb_LCD_ON = STATE_ON;
+ }
+ nlcd++;
+ if (var.xres)
+ inf->lcd_panel_hres = var.xres;
+ if (var.yres)
+ inf->lcd_panel_vres = var.yres;
+ }
+ ndev++;
+free_edid:
+ kfree(edid);
+ }
+ if (!viafb_active_dev) {
+ /* prefer CRT OFF if other devices */
+ if (!unknown && ndev > 1) {
+ viafb_CRT_ON = STATE_OFF;
+ viafb_crt_disable();
+ }
+ viafb_DeviceStatus = viafb_primary_dev =
+ viafb_CRT_ON ? CRT_Device :
+ viafb_DVI_ON ? DVI_Device :
+ viafb_LCD_ON ? LCD_Device : None_Device;
+ viafb_set_iga_path();
+ }
+}
+
#ifdef CONFIG_PM
static int viafb_suspend(void *unused)
@@ -1891,6 +2004,7 @@ int __devinit via_fb_pci_probe(struct vi
viafb_init_proc(viaparinfo->shared);
viafb_init_dac(IGA2);
+ viafb_detect_dev(vdev);
#ifdef CONFIG_PM
viafb_pm_register(&viafb_fb_pm_hooks);
--
--
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