From: Maxime Ripard Date: Wed, 21 Feb 2018 09:20:27 +0000 (+0100) Subject: drm/sun4i: Protect the TCON pixel clocks X-Git-Tag: v4.16-rc4~19^2~1^2~1 X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=79d103a565d16b1893d990b2ee5e0fe71767759f;p=uclinux-h8%2Flinux.git 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 Reviewed-by: Chen-Yu Tsai Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/d5224d2e81ecf73dc09f234e580ada52c00eaee3.1519204731.git-series.maxime.ripard@bootlin.com --- 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);