From: Haavard Skinnemoen Date: Tue, 12 Aug 2008 22:08:57 +0000 (-0700) Subject: atmel_lcdfb: add board parameter specify framebuffer memory size X-Git-Tag: firefly_0821_release~18320 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ea757acad5a5183c65a3e1b28b49a5978fe6a052;p=firefly-linux-kernel-4.4.55.git 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 Acked-by: Haavard Skinnemoen Acked-by: Krzysztof Helt Cc: Nicolas Ferre Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- 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;