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| author | Maxime Ripard <maxime.ripard@free-electrons.com> | 2017-12-21 14:02:31 +0300 |
|---|---|---|
| committer | Maxime Ripard <maxime.ripard@free-electrons.com> | 2018-01-04 22:04:32 +0300 |
| commit | edea372bd205a30385d4ffbf51afdac62bba478b (patch) | |
| tree | 68334f7e4cbc95af7b1557c47ef87e20d3b0186e /drivers/gpu/drm/sun4i/sun8i_mixer.c | |
| parent | 104fe24a5f9361e5a30733a5c127e84879bd362d (diff) | |
| download | linux-edea372bd205a30385d4ffbf51afdac62bba478b.tar.xz | |
drm/sun4i: Force the mixer rate at 150MHz
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.
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Link: https://patchwork.freedesktop.org/patch/msgid/f5f05307972ed05250e8094b302d68b9e7e167f6.1513854122.git-series.maxime.ripard@free-electrons.com
Diffstat (limited to 'drivers/gpu/drm/sun4i/sun8i_mixer.c')
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun8i_mixer.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.c b/drivers/gpu/drm/sun4i/sun8i_mixer.c index 29ceeb016d72..3a610a87cbd2 100644 --- a/drivers/gpu/drm/sun4i/sun8i_mixer.c +++ b/drivers/gpu/drm/sun4i/sun8i_mixer.c @@ -398,6 +398,15 @@ static int sun8i_mixer_bind(struct device *dev, struct device *master, ret = PTR_ERR(mixer->mod_clk); goto err_disable_bus_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. + */ + if (mixer->cfg->mod_rate) + clk_set_rate(mixer->mod_clk, mixer->cfg->mod_rate); + clk_prepare_enable(mixer->mod_clk); list_add_tail(&mixer->engine.list, &drv->engine_list); @@ -474,6 +483,7 @@ static const struct sun8i_mixer_cfg sun8i_v3s_mixer_cfg = { .ui_num = 1, .scaler_mask = 0x3, .ccsc = 0, + .mod_rate = 150000000, }; static const struct of_device_id sun8i_mixer_of_table[] = { |