Il 21/02/2018 10:20, Maxime Ripard ha scritto:
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.
Signed-off-by: Maxime Ripard maxime.ripard@free-electrons.com
Tested-by: Giulio Benetti giulio.benetti@micronovasrl.com
Tested on A20-LiNova1-4_3i-ctp with Mali r6p2 installed. Before Mali changed dotclock, now it doesn't anymore.
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);