From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bryan Wu Subject: [PATCH 1/1] Video/Framebuffer: add fuctional power management support to Blackfin BF54x LQ043 framebuffer driver Date: Fri, 15 Aug 2008 17:07:08 +0800 Message-ID: <1218791228-12974-1-git-send-email-cooloney@kernel.org> Return-path: Sender: linux-kernel-owner@vger.kernel.org List-ID: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: adaplas@gmail.com, linux-fbdev-devel@lists.sourceforge.net Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, Michael Hennerich , Bryan Wu From: Michael Hennerich Fix bug: does nor properply resume after suspend mem Fix for PM_SUSPEND_MEM: Save and restore peripheral base and DMA registers Signed-off-by: Michael Hennerich Signed-off-by: Bryan Wu --- drivers/video/bf54x-lq043fb.c | 15 ++++++++++++--- 1 files changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/video/bf54x-lq043fb.c b/drivers/video/bf54x-lq043fb.c index 940467a..6d5aa80 100644 --- a/drivers/video/bf54x-lq043fb.c +++ b/drivers/video/bf54x-lq043fb.c @@ -733,7 +733,6 @@ static int bfin_bf54x_remove(struct platform_device *pdev) static int bfin_bf54x_suspend(struct platform_device *pdev, pm_message_t state) { struct fb_info *fbinfo = platform_get_drvdata(pdev); - struct bfin_bf54xfb_info *info = fbinfo->par; bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() & ~EPPI_EN); disable_dma(CH_EPPI0); @@ -747,8 +746,18 @@ static int bfin_bf54x_resume(struct platform_device *pdev) struct fb_info *fbinfo = platform_get_drvdata(pdev); struct bfin_bf54xfb_info *info = fbinfo->par; - enable_dma(CH_EPPI0); - bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN); + if (info->lq043_open_cnt) { + + bfin_write_EPPI0_CONTROL(0); + SSYNC(); + + config_dma(info); + config_ppi(info); + + /* start dma */ + enable_dma(CH_EPPI0); + bfin_write_EPPI0_CONTROL(bfin_read_EPPI0_CONTROL() | EPPI_EN); + } return 0; } -- 1.5.6