Check for FB_BLANK_UNBLANK before enabling LCDC from PM resume
and DVFS. Without this, behavior in case of below used case is
not be not expected,
1) Issue FB_BLANK, LCDC disabled.
2) Do suspend/resume cycle or DVFS.
3) Do not expect LCDC to get enabled at this point.
Re-enabling of LCDC is done when FB_BLANK_UNBLANK is issued.
Signed-off-by: Manjunathappa, Prakash <prakash.pm@xxxxxx>
---
Applies on top of fbdev-next of Florian Tobias Schandinat's tree.
drivers/video/da8xx-fb.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c
index 761c8d1..1273354 100644
--- a/drivers/video/da8xx-fb.c
+++ b/drivers/video/da8xx-fb.c
@@ -962,7 +962,8 @@ static int lcd_da8xx_cpufreq_transition(struct notifier_block *nb,
par->lcd_fck_rate = clk_get_rate(par->lcdc_clk);
lcd_disable_raster();
lcd_calc_clk_divider(par);
- lcd_enable_raster();
+ if (par->blank == FB_BLANK_UNBLANK)
+ lcd_enable_raster();
}
}
@@ -1486,10 +1487,12 @@ static int fb_resume(struct platform_device *dev)
console_lock();
clk_enable(par->lcdc_clk);
- lcd_enable_raster();
+ if (par->blank == FB_BLANK_UNBLANK) {
+ lcd_enable_raster();
- if (par->panel_power_ctrl)
- par->panel_power_ctrl(1);
+ if (par->panel_power_ctrl)
+ par->panel_power_ctrl(1);
+ }
fb_set_suspend(info, 0);
console_unlock();
--
1.7.1
--
To unsubscribe from this list: send the line "unsubscribe linux-fbdev" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
