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Video/Framebuffer: add fuctional power management support to Blackfin BF54x LQ043 framebuffer driver

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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>
Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Michael Hennerich 2008-08-20 14:09:16 -07:00 committed by Linus Torvalds
parent 481ebd0d76
commit 141d87e7de
1 changed files with 12 additions and 3 deletions
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15
drivers/video/bf54x-lq043fb.c
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@ -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;
}