The very large values observed were the result of a bug in the
calculation. Y.C. Chen gave me the right formula so here is
a patch fixing it.
Thankfully nothing seem to use that unless you try to POST the
chip.
Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
--
diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c
index 60f23cc..3b87877 100644
--- a/drivers/gpu/drm/ast/ast_main.c
+++ b/drivers/gpu/drm/ast/ast_main.c
@@ -350,7 +350,7 @@ static int ast_get_dram_info(struct drm_device *dev)
div = 0x1;
break;
}
- ast->mclk = ref_pll * (num + 2) / (denum + 2) * (div * 1000);
+ ast->mclk = ref_pll * (num + 2) / ((denum + 2) * (div * 1000));
return 0;
}
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