2008-08-15 09:07:28

by Bryan Wu

Subject: [PATCH 1/1] Video/Framebuffer: add fuctional power management support to Blackfin BF54x LQ043 framebuffer driver

From: Michael Hennerich <[email protected]>

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 <[email protected]>
Signed-off-by: Bryan Wu <[email protected]>
---
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

2008-08-17 18:40:43

by Krzysztof Helt

Subject: Re: [Linux-fbdev-devel] [PATCH 1/1] Video/Framebuffer: add fuctional power management support to Blackfin BF54x LQ043 framebuffer driver

On Fri, 15 Aug 2008 17:07:08 +0800
Bryan Wu <[email protected]> wrote:

> From: Michael Hennerich <[email protected]>
>
> 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 <[email protected]>
> Signed-off-by: Bryan Wu <[email protected]>
> ---
> drivers/video/bf54x-lq043fb.c | 15 ++++++++++++---
> 1 files changed, 12 insertions(+), 3 deletions(-)
>

Acked-by: Krzysztof Helt <[email protected]>

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