diff options
| author |   Maxime Ripard <maxime.ripard@free-electrons.com> | 2018-02-21 10:20:27 +0100 |
|---|---|---|
| committer |   Maxime Ripard <maxime.ripard@bootlin.com> | 2018-02-26 11:57:35 +0100 |
| commit | 79d103a565d16b1893d990b2ee5e0fe71767759f (patch) | |
| tree | 7065fea0a82fc89ae88dbdae063bf03b5c1f6f39 /drivers | |
| parent | drm/sun4i: Enable the output on the pins (tcon0) (diff) | |
| download | linux-dev-79d103a565d16b1893d990b2ee5e0fe71767759f.tar.xz linux-dev-79d103a565d16b1893d990b2ee5e0fe71767759f.zip | |
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')
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun4i_tcon.c | 4 |
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); |