[PATCH 5.10 153/215] drm/vc4: txp: Properly set the possible_crtcs mask

[Greg Kroah-Hartman]

From: Maxime Ripard <maxime@xxxxxxxxxx>

commit bf6de8e61509f3c957d7f75f017b18d40a18a950 upstream.

The current code does a binary OR on the possible_crtcs variable of the
TXP encoder, while we want to set it to that value instead.

Cc: <stable@xxxxxxxxxxxxxxx> # v5.9+
Fixes: 39fcb2808376 ("drm/vc4: txp: Turn the TXP into a CRTC of its own")
Acked-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Signed-off-by: Maxime Ripard <maxime@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20210507150515.257424-2-maxime@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/gpu/drm/vc4/vc4_txp.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/vc4/vc4_txp.c
+++ b/drivers/gpu/drm/vc4/vc4_txp.c
@@ -503,7 +503,7 @@ static int vc4_txp_bind(struct device *d
 		return ret;
 
 	encoder = &txp->connector.encoder;
-	encoder->possible_crtcs |= drm_crtc_mask(crtc);
+	encoder->possible_crtcs = drm_crtc_mask(crtc);
 
 	ret = devm_request_irq(dev, irq, vc4_txp_interrupt, 0,
 			       dev_name(dev), txp);