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authorHaavard Skinnemoen <haavard.skinnemoen@atmel.com>2008-08-12 15:08:57 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-08-12 16:07:29 -0700
commitea757acad5a5183c65a3e1b28b49a5978fe6a052 (patch)
tree6cefcbb3770fa13719792e03158b9d8f3b0d36ac
parente730d8b0a5882b66c169e1bed09774d5d365e2e0 (diff)
downloadlinux-stericsson-ea757acad5a5183c65a3e1b28b49a5978fe6a052.tar.gz
atmel_lcdfb: add board parameter specify framebuffer memory size
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 <stf_xl@wp.pl> Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Acked-by: Krzysztof Helt <krzysztof.h1@wp.pl> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/video/atmel_lcdfb.c7
-rw-r--r--include/video/atmel_lcdc.h1
2 files changed, 6 insertions, 2 deletions
diff --git a/drivers/video/atmel_lcdfb.c b/drivers/video/atmel_lcdfb.c
index 16e47eb2ff5d..9c5925927ece 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 613173b5db69..920c4e9cb93d 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;