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@xxxxxxx>
---
drivers/video/mb862xx/mb862xxfb.c | 16 ++++++++++++----
1 files changed, 12 insertions(+), 4 deletions(-)
diff --git a/drivers/video/mb862xx/mb862xxfb.c b/drivers/video/mb862xx/mb862xxfb.c
index 8257958..a1b81e7 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 {
--
1.7.1
--
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