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authorTomi Valkeinen <tomi.valkeinen@ti.com>2011-03-03 14:16:23 +0300
committerTomi Valkeinen <tomi.valkeinen@ti.com>2011-03-11 16:46:29 +0300
commit85604b0a247615157cedfec46b9cbfde2884f80f (patch)
treeec88ac187104b424ccc00cec4a2846573b25cbeb /drivers/video/omap2/dss/dss.c
parentf2988ab9f4a2bf5e24f37d20eab1aad6862953d3 (diff)
downloadlinux-85604b0a247615157cedfec46b9cbfde2884f80f.tar.xz
HACK: OMAP: DSS2: add delay after enabling clocks
On omap4 the registers may not be accessible right after enabling the clocks. At some point this will be handled by pm_runtime, but, for the time begin, adding a small delay after clk_enable() should make things work. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Diffstat (limited to 'drivers/video/omap2/dss/dss.c')
-rw-r--r--drivers/video/omap2/dss/dss.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c
index e5da050bcf85..2be4d03ece43 100644
--- a/drivers/video/omap2/dss/dss.c
+++ b/drivers/video/omap2/dss/dss.c
@@ -850,6 +850,14 @@ void dss_clk_enable(enum dss_clock clks)
dss_clk_enable_no_ctx(clks);
+ /*
+ * HACK: On omap4 the registers may not be accessible right after
+ * enabling the clocks. At some point this will be handled by
+ * pm_runtime, but for the time begin this should make things work.
+ */
+ if (cpu_is_omap44xx() && check_ctx)
+ udelay(10);
+
if (check_ctx && cpu_is_omap34xx() && dss_need_ctx_restore())
restore_all_ctx();
}