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Re: [Linux-fbdev-devel] [PATCH 2/2] atmel_lcdfb: Add board parameter specify framebuffer memory size
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From: Krzysztof H. <krz...@po...> - 2008-08-08 16:49:56
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On Fri, 8 Aug 2008 14:47:05 +0200
Stanislaw Gruszka <st...@wp...> wrote:
> Specify how much physically continuous, DMA capable memory will be allocated
> at driver initialization time. This allow to create framebuffer device with
> larger virtual resolution. Combine with y-panning this can be used to
> implement double buffering acceleration method.
>
> Signed-off-by: Stanislaw Gruszka <st...@wp...>
> Acked-by: Haavard Skinnemoen <haa...@at...>
> ---
Acked-by: Krzysztof Helt <krz...@wp...>
> drivers/video/atmel_lcdfb.c | 7 +++++--
> include/video/atmel_lcdc.h | 1 +
> 2 files changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/video/atmel_lcdfb.c b/drivers/video/atmel_lcdfb.c
> index e1acfa7..a471a60 100644
> --- a/drivers/video/atmel_lcdfb.c
> +++ b/drivers/video/atmel_lcdfb.c
> @@ -242,9 +242,11 @@ static int atmel_lcdfb_alloc_video_memory(struct
> atmel_lcdfb_info *sinfo)
> {
> struct fb_info *info = sinfo->info;
> struct fb_var_screeninfo *var = &info->var;
> + unsigned int smem_len;
>
> - info->fix.smem_len = (var->xres_virtual * var->yres_virtual
> - * ((var->bits_per_pixel + 7) / 8));
> + smem_len = (var->xres_virtual * var->yres_virtual
> + * ((var->bits_per_pixel + 7) / 8));
> + info->fix.smem_len = max(smem_len, sinfo->smem_len);
>
> info->screen_base = dma_alloc_writecombine(info->device, info->fix.smem_len,
> (dma_addr_t *)&info->fix.smem_start, GFP_KERNEL);
> @@ -796,6 +798,7 @@ static int __init atmel_lcdfb_probe(struct platform_device
> *pdev)
> sinfo->default_monspecs = pdata_sinfo->default_monspecs;
> sinfo->atmel_lcdfb_power_control = pdata_sinfo->atmel_lcdfb_power_control;
> sinfo->guard_time = pdata_sinfo->guard_time;
> + sinfo->smem_len = pdata_sinfo->smem_len;
> sinfo->lcdcon_is_backlight = pdata_sinfo->lcdcon_is_backlight;
> sinfo->lcd_wiring_mode = pdata_sinfo->lcd_wiring_mode;
> } else {
> diff --git a/include/video/atmel_lcdc.h b/include/video/atmel_lcdc.h
> index 613173b..920c4e9 100644
> --- a/include/video/atmel_lcdc.h
> +++ b/include/video/atmel_lcdc.h
> @@ -41,6 +41,7 @@ struct atmel_lcdfb_info {
> struct work_struct task;
>
> unsigned int guard_time;
> + unsigned int smem_len;
> struct platform_device *pdev;
> struct clk *bus_clk;
> struct clk *lcdc_clk;
> --
> 1.5.2.5
>
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