On Mon, Nov 27, 2017 at 05:07:04PM +0100, Jernej Škrabec wrote:
Hi Maxime,
Dne ponedeljek, 27. november 2017 ob 16:41:29 CET je Maxime Ripard napisal(a):
It seems like the mixer can only run properly when clocked at 150MHz. In order to have something more robust than simply a fire-and-forget assigned-clocks-rate, let's put that in the code.
Signed-off-by: Maxime Ripard maxime.ripard@free-electrons.com
drivers/gpu/drm/sun4i/sun8i_mixer.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c index cb193c5f1686..c0cdccf772a2 100644 --- a/drivers/gpu/drm/sun4i/sun8i_mixer.c +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c @@ -315,6 +315,13 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master, } clk_prepare_enable(mixer->mod_clk);
- /*
* It seems that we need to enforce that rate for whatever* reason for the mixer to be functional. Make sure it's the* case.*/- clk_set_rate(mixer->mod_clk, 150000000);
H3 mixer works at much higher rate and if we want to support tv out, it must be dividable by 432 MHz, so either 432 MHz or maybe even 864 MHz.
We talked about that few months ago.
I guess this should be read from mixer configuration structure.
That works for me. Actually, I didn't need it at all for the LVDS output on the A83t, the default seems to work just fine. Do you know what it's related to? Maybe we can make that a bit more dynamic?
Maxime