From: Maxime Ripard <maxime.rip...@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.bene...@micronovasrl.com>
Signed-off-by: Maxime Ripard <maxime.rip...@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);

Reply via email to