Take crtc modeset lock while updating the crtc clock rate. To avoid a race in tilcdc_crtc_update_clk(), we do not want crtc mode to change while we update crtc clock.
Signed-off-by: Jyri Sarha jsarha@ti.com --- drivers/gpu/drm/tilcdc/tilcdc_drv.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c index f8892e9..b1ac61e 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c @@ -184,10 +184,13 @@ static int cpufreq_transition(struct notifier_block *nb, { struct tilcdc_drm_private *priv = container_of(nb, struct tilcdc_drm_private, freq_transition); + if (val == CPUFREQ_POSTCHANGE) { if (priv->lcd_fck_rate != clk_get_rate(priv->clk)) { + drm_modeset_lock_crtc(priv->crtc, NULL); priv->lcd_fck_rate = clk_get_rate(priv->clk); tilcdc_crtc_update_clk(priv->crtc); + drm_modeset_unlock_crtc(priv->crtc); } }