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authorChaithrika U S <chaithrika@ti.com>2009-12-15 16:46:39 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-16 07:20:05 -0800
commit1d3c6c7b366bdc3406af96bf55d63b4aa24f400a (patch)
tree30e466991a6678b9dc8c74263f35fde76bc1780d /drivers/video/da8xx-fb.c
parent3611380490c6ce27a2277709a34b8c5531524caf (diff)
davinci: fb : add suspend/resume suuport for DA8xx/OMAP-L1xx fb driver
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>
Diffstat (limited to 'drivers/video/da8xx-fb.c')
-rw-r--r--drivers/video/da8xx-fb.c29
1 files changed, 27 insertions, 2 deletions
diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c
index eb95b893e8b2..36574bf61d06 100644
--- a/drivers/video/da8xx-fb.c
+++ b/drivers/video/da8xx-fb.c
@@ -29,6 +29,7 @@
#include <linux/interrupt.h>
#include <linux/clk.h>
#include <linux/cpufreq.h>
+#include <linux/console.h>
#include <video/da8xx-fb.h>
#define DRIVER_NAME "da8xx_lcdc"
@@ -930,11 +931,35 @@ err_request_mem:
#ifdef CONFIG_PM
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)
{
- 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
#define fb_suspend NULL