From 44706a87654bae810cc0740e9cafde134c5796f1 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Wed, 17 Oct 2012 13:24:57 +0000 Subject: [PATCH] tegra: Support control of cache settings for LCD Add support for selecting the required cache mode for the LCD: off, write-through or write-back. Signed-off-by: Simon Glass Signed-off-by: Tom Warren --- drivers/video/tegra.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/video/tegra.c b/drivers/video/tegra.c index ab26ad0958..750a283438 100644 --- a/drivers/video/tegra.c +++ b/drivers/video/tegra.c @@ -146,6 +146,7 @@ static void update_panel_size(struct fdt_disp_config *config) void lcd_ctrl_init(void *lcdbase) { int line_length, size; + int type = DCACHE_OFF; assert(disp_config); @@ -161,6 +162,16 @@ void lcd_ctrl_init(void *lcdbase) update_panel_size(disp_config); size = lcd_get_size(&line_length); + /* Set up the LCD caching as requested */ + if (config.cache_type & FDT_LCD_CACHE_WRITE_THROUGH) + type = DCACHE_WRITETHROUGH; + else if (config.cache_type & FDT_LCD_CACHE_WRITE_BACK) + type = DCACHE_WRITEBACK; + mmu_set_region_dcache_behaviour(disp_config->frame_buffer, size, type); + + /* Enable flushing after LCD writes if requested */ + lcd_set_flush_dcache(config.cache_type & FDT_LCD_CACHE_FLUSH); + debug("LCD frame buffer at %p\n", lcd_base); } -- 2.39.5