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davinci: fb : add suspend/resume suuport for DA8xx/OMAP-L1xx fb driver

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Suspend/resume support DA8xx/OMAP-L1xx frame buffer driver.  This feature
has been tested on DA850/OMAP-L138 EVM.  For the purpose of testing, the
patch series[1] which adds suspend support for DA850/OMAP-L138 SoC was
applied.

[1] http://patchwork.kernel.org/patch/60260/

Signed-off-by: Chaithrika U S <chaithrika@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Chaithrika U S 2009-12-15 16:46:39 -08:00 committed by Linus Torvalds
parent 3611380490
commit 1d3c6c7b36
1 changed files with 27 additions and 2 deletions
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29
drivers/video/da8xx-fb.c
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@ -29,6 +29,7 @@
#include <linux/interrupt.h> #include <linux/interrupt.h>
#include <linux/clk.h> #include <linux/clk.h>
#include <linux/cpufreq.h> #include <linux/cpufreq.h>
#include <linux/console.h>
#include <video/da8xx-fb.h> #include <video/da8xx-fb.h>
#define DRIVER_NAME "da8xx_lcdc" #define DRIVER_NAME "da8xx_lcdc"
@ -930,11 +931,35 @@ err_request_mem:
#ifdef CONFIG_PM #ifdef CONFIG_PM
static int fb_suspend(struct platform_device *dev, pm_message_t state) static int fb_suspend(struct platform_device *dev, pm_message_t state)
{ {
return -EBUSY; struct fb_info *info = platform_get_drvdata(dev);
struct da8xx_fb_par *par = info->par;
acquire_console_sem();
if (par->panel_power_ctrl)
par->panel_power_ctrl(0);
fb_set_suspend(info, 1);
lcd_disable_raster();
clk_disable(par->lcdc_clk);
release_console_sem();
return 0;
} }
static int fb_resume(struct platform_device *dev) static int fb_resume(struct platform_device *dev)
{ {
return -EBUSY; struct fb_info *info = platform_get_drvdata(dev);
struct da8xx_fb_par *par = info->par;
acquire_console_sem();
if (par->panel_power_ctrl)
par->panel_power_ctrl(1);
clk_enable(par->lcdc_clk);
lcd_enable_raster();
fb_set_suspend(info, 0);
release_console_sem();
return 0;
} }
#else #else
#define fb_suspend NULL #define fb_suspend NULL