Messages in this thread Patch in this message | | | Subject | Re: [v2,03/10] drm/sun4i: Protect the TCON pixel clocks | From | Giulio Benetti <> | Date | Fri, 23 Feb 2018 15:05:26 +0100 |
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From: Maxime Ripard <maxime.ripard@free-electrons.com>
Both TCON clocks are very sensitive to clock changes, since any change might lead to improper timings.
Make sure our rate is never changed.
Tested-by: Giulio Benetti <giulio.benetti@micronovasrl.com> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> --- drivers/gpu/drm/sun4i/sun4i_tcon.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c index b73acab74867..cbe87cee13d1 100644 --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c @@ -261,7 +261,7 @@ static void sun4i_tcon0_mode_set_common(struct sun4i_tcon *tcon, const struct drm_display_mode *mode) { /* Configure the dot clock */ - clk_set_rate(tcon->dclk, mode->crtc_clock * 1000); + clk_set_rate_exclusive(tcon->dclk, mode->crtc_clock * 1000);
/* Set the resolution */ regmap_write(tcon->regs, SUN4I_TCON0_BASIC0_REG, @@ -419,7 +419,7 @@ static void sun4i_tcon1_mode_set(struct sun4i_tcon *tcon, WARN_ON(!tcon->quirks->has_channel_1);
/* Configure the dot clock */ - clk_set_rate(tcon->sclk1, mode->crtc_clock * 1000); + clk_set_rate_exclusive(tcon->sclk1, mode->crtc_clock * 1000);
/* Adjust clock delay */ clk_delay = sun4i_tcon_get_clk_delay(mode, 1);
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