Add pm_runtime support to the da8xx-fb frame buffer driver.
Signed-off-by: Manjunathappa, Prakash <prakash.pm@xxxxxx>
---
Applies on top of patch "da8xx-fb: enable LCDC if FB is unblanked" under review.
Since v1:
Use pm_runtime_put_sync in PM suspend callback.
drivers/video/da8xx-fb.c | 27 +++++++++++++--------------
1 files changed, 13 insertions(+), 14 deletions(-)
diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c
index af2aa38..4280d23 100644
--- a/drivers/video/da8xx-fb.c
+++ b/drivers/video/da8xx-fb.c
@@ -26,6 +26,7 @@
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/uaccess.h>
+#include <linux/pm_runtime.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <linux/clk.h>
@@ -1037,8 +1038,8 @@ static int __devexit fb_remove(struct platform_device *dev)
dma_free_coherent(NULL, par->vram_size, par->vram_virt,
par->vram_phys);
free_irq(par->irq, par);
- clk_disable(par->lcdc_clk);
- clk_put(par->lcdc_clk);
+ pm_runtime_put_sync(&dev->dev);
+ pm_runtime_disable(&dev->dev);
framebuffer_release(info);
iounmap((void __iomem *)da8xx_fb_reg_base);
release_mem_region(lcdc_regs->start, resource_size(lcdc_regs));
@@ -1272,9 +1273,9 @@ static int __devinit fb_probe(struct platform_device *device)
ret = -ENODEV;
goto err_ioremap;
}
- ret = clk_enable(fb_clk);
- if (ret)
- goto err_clk_put;
+
+ pm_runtime_enable(&device->dev);
+ pm_runtime_get_sync(&device->dev);
/* Determine LCD IP Version */
switch (lcdc_read(LCD_PID_REG)) {
@@ -1302,7 +1303,7 @@ static int __devinit fb_probe(struct platform_device *device)
if (i == ARRAY_SIZE(known_lcd_panels)) {
dev_err(&device->dev, "GLCD: No valid panel found\n");
ret = -ENODEV;
- goto err_clk_disable;
+ goto err_pm_runtime_disable;
} else
dev_info(&device->dev, "GLCD: Found %s panel\n",
fb_pdata->type);
@@ -1314,7 +1315,7 @@ static int __devinit fb_probe(struct platform_device *device)
if (!da8xx_fb_info) {
dev_dbg(&device->dev, "Memory allocation failed for fb_info\n");
ret = -ENOMEM;
- goto err_clk_disable;
+ goto err_pm_runtime_disable;
}
par = da8xx_fb_info->par;
@@ -1476,11 +1477,9 @@ err_release_fb_mem:
err_release_fb:
framebuffer_release(da8xx_fb_info);
-err_clk_disable:
- clk_disable(fb_clk);
-
-err_clk_put:
- clk_put(fb_clk);
+err_pm_runtime_disable:
+ pm_runtime_put_sync(&device->dev);
+ pm_runtime_disable(&device->dev);
err_ioremap:
iounmap((void __iomem *)da8xx_fb_reg_base);
@@ -1503,7 +1502,7 @@ static int fb_suspend(struct platform_device *dev, pm_message_t state)
fb_set_suspend(info, 1);
lcd_disable_raster(true);
- clk_disable(par->lcdc_clk);
+ pm_runtime_put_sync(&dev->dev);
console_unlock();
return 0;
@@ -1514,7 +1513,7 @@ static int fb_resume(struct platform_device *dev)
struct da8xx_fb_par *par = info->par;
console_lock();
- clk_enable(par->lcdc_clk);
+ pm_runtime_get_sync(&dev->dev);
if (par->blank == FB_BLANK_UNBLANK) {
lcd_enable_raster();
--
1.7.0.4
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