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 <[email protected]> --- Since v1: Fixed the spelling mistake. drivers/video/da8xx-fb.c | 19 ++++++++++++++++++- 1 files changed, 18 insertions(+), 1 deletions(-) diff --git a/drivers/video/da8xx-fb.c b/drivers/video/da8xx-fb.c index f360d62..882dd67 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 +1048,22 @@ static struct fb_ops da8xx_fb_ops = { .fb_blank = cfb_blank, }; +/* Calculate and return pixel clock period in pico seconds */ +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 +1225,7 @@ 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 _______________________________________________ Davinci-linux-open-source mailing list [email protected] http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
