* [PATCH] video:da8xx-fb: calculate pixel clock period for the panel
2012-02-09 5:16 [PATCH] video: da8xx-fb: Fix build warning on unused label Manjunathappa, Prakash
@ 2012-02-09 5:16 ` Manjunathappa, Prakash
2012-02-13 21:27 ` [PATCH] video: da8xx-fb: Fix build warning on unused label Florian Tobias Schandinat
1 sibling, 0 replies; 3+ messages in thread
From: Manjunathappa, Prakash @ 2012-02-09 5:16 UTC (permalink / raw)
To: linux-fbdev
Cc: Florian Tobias Schandinat, davinci-linux-open-source,
linux-kernel, Manjunathappa, Prakash
Patch calculates pixel clock period in pico seconds and updates
the same in variable screen information structure. fbset utility
uses this information.
Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
---
drivers/video/da8xx-fb.c | 21 ++++++++++++++++++++-
1 files changed, 20 insertions(+), 1 deletions(-)
diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c
index f360d62..8b0a174 100644
--- a/drivers/video/da8xx-fb.c
+++ b/drivers/video/da8xx-fb.c
@@ -32,6 +32,7 @@
#include <linux/console.h>
#include <linux/slab.h>
#include <video/da8xx-fb.h>
+#include <asm/div64.h>
#define DRIVER_NAME "da8xx_lcdc"
@@ -174,7 +175,6 @@ static struct fb_var_screeninfo da8xx_fb_var __devinitdata = {
.activate = 0,
.height = -1,
.width = -1,
- .pixclock = 46666, /* 46us - AUO display */
.accel_flags = 0,
.left_margin = LEFT_MARGIN,
.right_margin = RIGHT_MARGIN,
@@ -1048,6 +1048,24 @@ static struct fb_ops da8xx_fb_ops = {
.fb_blank = cfb_blank,
};
+/*
+ * Calculate and return pixel clock period in pico secods
+ */
+static unsigned int da8xxfb_pixel_clk_period(struct da8xx_fb_par *par)
+{
+ unsigned int lcd_clk, div;
+ unsigned int configured_pix_clk;
+ unsigned long long pix_clk_period_picosec = 1000000000000ULL;
+
+ lcd_clk = clk_get_rate(par->lcdc_clk);
+ div = lcd_clk / par->pxl_clk;
+ configured_pix_clk = (lcd_clk / div);
+
+ do_div(pix_clk_period_picosec, configured_pix_clk);
+
+ return pix_clk_period_picosec;
+}
+
static int __devinit fb_probe(struct platform_device *device)
{
struct da8xx_lcdc_platform_data *fb_pdata @@ -1209,6 +1227,7 @@ static int __devinit fb_probe(struct platform_device *device)
da8xx_fb_var.hsync_len = lcdc_info->hsw;
da8xx_fb_var.vsync_len = lcdc_info->vsw;
+ da8xx_fb_var.pixclock = da8xxfb_pixel_clk_period(par);
/* Initialize fbinfo */
da8xx_fb_info->flags = FBINFO_FLAG_DEFAULT;
--
1.7.1
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] video: da8xx-fb: Fix build warning on unused label
2012-02-09 5:16 [PATCH] video: da8xx-fb: Fix build warning on unused label Manjunathappa, Prakash
2012-02-09 5:16 ` [PATCH] video:da8xx-fb: calculate pixel clock period for the panel Manjunathappa, Prakash
@ 2012-02-13 21:27 ` Florian Tobias Schandinat
1 sibling, 0 replies; 3+ messages in thread
From: Florian Tobias Schandinat @ 2012-02-13 21:27 UTC (permalink / raw)
To: Manjunathappa, Prakash
Cc: linux-fbdev, davinci-linux-open-source, linux-kernel
On 02/09/2012 05:04 AM, Manjunathappa, Prakash wrote:
> Patch fixes build warning on label "err_cpu_freq" when CONFIG_CPU_FREQ
> is not defined.
>
> Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
Applied.
Thanks,
Florian Tobias Schandinat
> ---
> drivers/video/da8xx-fb.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c
> index 29577bf..f360d62 100644
> --- a/drivers/video/da8xx-fb.c
> +++ b/drivers/video/da8xx-fb.c
> @@ -1264,8 +1264,8 @@ static int __devinit fb_probe(struct platform_device *device)
> irq_freq:
> #ifdef CONFIG_CPU_FREQ
> lcd_da8xx_cpufreq_deregister(par);
> -#endif
> err_cpu_freq:
> +#endif
> unregister_framebuffer(da8xx_fb_info);
>
> err_dealloc_cmap:
^ permalink raw reply [flat|nested] 3+ messages in thread