[U-Boot] [PATCH v3 058/108] x86: fsp: Set up an MTRR for the graphics frame buffer

[Simon Glass]

The FSP-S may do this but at least for coral it does not. Set this up so
that graphics is not deathly slow.

Signed-off-by: Simon Glass <s...@chromium.org>
---

Changes in v3: None
Changes in v2: None

 arch/x86/lib/fsp/fsp_graphics.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/lib/fsp/fsp_graphics.c b/arch/x86/lib/fsp/fsp_graphics.c
index 91d2d085572..226c7e66b3f 100644
--- a/arch/x86/lib/fsp/fsp_graphics.c
+++ b/arch/x86/lib/fsp/fsp_graphics.c
@@ -8,6 +8,7 @@
 #include <vbe.h>
 #include <video.h>
 #include <asm/fsp/fsp_support.h>
+#include <asm/mtrr.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -97,6 +98,9 @@ static int fsp_video_probe(struct udevice *dev)
        if (ret)
                goto err;
 
+       mtrr_add_request(MTRR_TYPE_WRCOMB, vesa->phys_base_ptr, 256 << 20);
+       mtrr_commit(true);
+
        printf("%dx%dx%d\n", uc_priv->xsize, uc_priv->ysize,
               vesa->bits_per_pixel);
 
-- 
2.23.0.866.gb869b98d4c-goog

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