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| author | Simon Glass <sjg@chromium.org> | 2012-10-17 13:24:57 +0000 |
|---|---|---|
| committer | Tom Warren <twarren@nvidia.com> | 2012-11-19 08:15:39 -0700 |
| commit | 44706a87654bae810cc0740e9cafde134c5796f1 (patch) | |
| tree | cfb8a61f70c33d648f9aff619c397eefbfa39ff2 /drivers | |
| parent | ad16617f74326ee860243ba0aca6b7a01dd25a1f (diff) | |
| download | u-boot-imx-44706a87654bae810cc0740e9cafde134c5796f1.zip u-boot-imx-44706a87654bae810cc0740e9cafde134c5796f1.tar.gz u-boot-imx-44706a87654bae810cc0740e9cafde134c5796f1.tar.bz2 | |
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 <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/tegra.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/video/tegra.c b/drivers/video/tegra.c index ab26ad0..750a283 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); } |