[PATCH 1/1] Video/Framebuffer: add fuctional power management support to Blackfin BF54x LQ043 framebuffer driver
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From: Bryan Wu <cooloney@kernel.org>
Date: 2008-08-15 09:07:28
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lkml
Subsystem:
framebuffer layer, the rest · Maintainers:
Helge Deller, Linus Torvalds
From: Michael Hennerich <michael.hennerich@analog.com> 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 <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> --- 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; }
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1.5.6