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authorMaxime Ripard <maxime.ripard@free-electrons.com>2018-02-21 10:20:27 +0100
committerMaxime Ripard <maxime.ripard@bootlin.com>2018-02-26 11:57:35 +0100
commit79d103a565d16b1893d990b2ee5e0fe71767759f (patch)
tree7065fea0a82fc89ae88dbdae063bf03b5c1f6f39 /drivers/gpu
parent80b79e31c4195731464d96716f15716f38a555eb (diff)
downloadlinux-79d103a565d16b1893d990b2ee5e0fe71767759f.tar.bz2
drm/sun4i: Protect the TCON pixel clocks
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> 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/d5224d2e81ecf73dc09f234e580ada52c00eaee3.1519204731.git-series.maxime.ripard@bootlin.com
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/sun4i/sun4i_tcon.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index 51740ddb4b32..b3960118deb9 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -260,7 +260,7 @@ 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,
@@ -421,7 +421,7 @@ 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);