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Commit a6b7ebaa authored by Jyri Sarha's avatar Jyri Sarha
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drm/tilcdc: Take crtc modeset lock while updating the crtc clock rate 



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: default avatarJyri Sarha <jsarha@ti.com>
Reviewed-by: default avatarTomi Valkeinen <tomi.valkeinen@ti.com>
parent c5665385

drivers/gpu/drm/tilcdc/tilcdc_drv.c

+3 −0
Original line number Diff line number Diff line
@@ -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);

		}

	}