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| author | Olof Johansson <olof@lixom.net> | 2013-01-23 20:35:02 -0800 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2013-01-23 20:35:02 -0800 |
| commit | 4ad3041d3b76632c02b50aa384a8f21d7d15bac0 (patch) | |
| tree | 5b43d0934d8328a15498c6898c56ec71e020ccd1 | |
| parent | f6be19c8bcca7185dcbda61f34f99d8b15bcd165 (diff) | |
| parent | e6b267ce14f61d9da0151b97ee26ab4d38055567 (diff) | |
| download | lwn-4ad3041d3b76632c02b50aa384a8f21d7d15bac0.tar.gz lwn-4ad3041d3b76632c02b50aa384a8f21d7d15bac0.zip | |
Merge tag 'imx-fixes-3.8-3' of git://git.linaro.org/people/shawnguo/linux-2.6 into fixes
From Shawn Guo:
This is yet another critical imxfb fixes held off by absence of FB
maintainer for some time.
* tag 'imx-fixes-3.8-3' of git://git.linaro.org/people/shawnguo/linux-2.6:
video: imxfb: Do not crash on reboot
| -rw-r--r-- | drivers/video/imxfb.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/video/imxfb.c b/drivers/video/imxfb.c index 600f6f9987cc..0abf2bf20836 100644 --- a/drivers/video/imxfb.c +++ b/drivers/video/imxfb.c @@ -139,6 +139,7 @@ struct imxfb_info { struct clk *clk_ahb; struct clk *clk_per; enum imxfb_type devtype; + bool enabled; /* * These are the addresses we mapped @@ -536,6 +537,10 @@ static void imxfb_exit_backlight(struct imxfb_info *fbi) static void imxfb_enable_controller(struct imxfb_info *fbi) { + + if (fbi->enabled) + return; + pr_debug("Enabling LCD controller\n"); writel(fbi->screen_dma, fbi->regs + LCDC_SSA); @@ -556,6 +561,7 @@ static void imxfb_enable_controller(struct imxfb_info *fbi) clk_prepare_enable(fbi->clk_ipg); clk_prepare_enable(fbi->clk_ahb); clk_prepare_enable(fbi->clk_per); + fbi->enabled = true; if (fbi->backlight_power) fbi->backlight_power(1); @@ -565,6 +571,9 @@ static void imxfb_enable_controller(struct imxfb_info *fbi) static void imxfb_disable_controller(struct imxfb_info *fbi) { + if (!fbi->enabled) + return; + pr_debug("Disabling LCD controller\n"); if (fbi->backlight_power) @@ -575,6 +584,7 @@ static void imxfb_disable_controller(struct imxfb_info *fbi) clk_disable_unprepare(fbi->clk_per); clk_disable_unprepare(fbi->clk_ipg); clk_disable_unprepare(fbi->clk_ahb); + fbi->enabled = false; writel(0, fbi->regs + LCDC_RMCR); } |