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authorAnatolij Gustschin <agust@denx.de>2011-05-13 14:12:15 +0200
committerAnatolij Gustschin <agust@denx.de>2011-05-24 16:28:51 +0200
commit3cadf9455c31de340ed77394dfad330caeb66b58 (patch)
tree4523ca559a55147e6a90b275c06eeb14d8ced1a4 /drivers/video/mb862xx
parentdcdf2f7e7e154957f913e5468e3715e1a0401138 (diff)
video: mb862xxfb: use pre-initialized configuration for PCI GDCs
If the bootloader has already initialized the display controller, do not re-initialize it in the driver. Take over the bootloader's configuration instead. This is already supported for non PCI GDCs Lime and Mint. Add this functionality for PCI GDCs Coral-P and Coral-PA. It is useful to avoid flicker and also avoids unneeded init delays while booting. Signed-off-by: Anatolij Gustschin <agust@denx.de>
Diffstat (limited to 'drivers/video/mb862xx')
-rw-r--r--drivers/video/mb862xx/mb862xxfb.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/video/mb862xx/mb862xxfb.c b/drivers/video/mb862xx/mb862xxfb.c
index 825795894da..a1b81e73394 100644
--- a/drivers/video/mb862xx/mb862xxfb.c
+++ b/drivers/video/mb862xx/mb862xxfb.c
@@ -746,13 +746,21 @@ static int coralp_init(struct mb862xxfb_par *par)
cn = (ver & GC_CID_CNAME_MSK) >> 8;
ver = ver & GC_CID_VERSION_MSK;
if (cn == 3) {
+ unsigned long reg;
+
dev_info(par->dev, "Fujitsu Coral-%s GDC Rev.%d found\n",\
(ver == 6) ? "P" : (ver == 8) ? "PA" : "?",
par->pdev->revision);
- outreg(host, GC_CCF, GC_CCF_CGE_166 | GC_CCF_COT_133);
- udelay(200);
- outreg(host, GC_MMR, GC_MMR_CORALP_EVB_VAL);
- udelay(10);
+ reg = inreg(disp, GC_DCM1);
+ if (reg & GC_DCM01_DEN && reg & GC_DCM01_L0E)
+ par->pre_init = 1;
+
+ if (!par->pre_init) {
+ outreg(host, GC_CCF, GC_CCF_CGE_166 | GC_CCF_COT_133);
+ udelay(200);
+ outreg(host, GC_MMR, GC_MMR_CORALP_EVB_VAL);
+ udelay(10);
+ }
/* Clear interrupt status */
outreg(host, GC_IST, 0);
} else {