From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anatolij Gustschin Date: Fri, 13 May 2011 15:54:46 +0000 Subject: [PATCH 2/5] video: mb862xxfb: use pre-initialized configuration for PCI GDCs Message-Id: <1305302089-7666-3-git-send-email-agust@denx.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-fbdev@vger.kernel.org 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 --- 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