From 1a975485480e45900380467e1a4f9b4d280ea361 Mon Sep 17 00:00:00 2001 From: Tomi Valkeinen Date: Thu, 3 Mar 2011 13:16:23 +0200 Subject: 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 --- drivers/video/omap2/dss/dss.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c index e5da050bcf8..2be4d03ece4 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(); } -- cgit v1.2.3