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From:   Paul Kocialkowski <paul.kocialkowski@bootlin.com>
To:     linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org,
        linux-arm-kernel@lists.infradead.org
Cc:     Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
        Maxime Ripard <maxime.ripard@bootlin.com>,
        Sean Paul <sean@poorly.run>, David Airlie <airlied@linux.ie>,
        Chen-Yu Tsai <wens@csie.org>,
        Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
        linux-sunxi@googlegroups.com, Daniel Vetter <daniel@ffwll.ch>,
        Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Subject: [PATCH v2 13/43] drm/sun4i: backend: Use explicit fourcc helpers for packed YUV422 check
Date:   Fri, 23 Nov 2018 10:24:45 +0100
Message-Id: <20181123092515.2511-14-paul.kocialkowski@bootlin.com>
In-Reply-To: <20181123092515.2511-1-paul.kocialkowski@bootlin.com>
References: <20181123092515.2511-1-paul.kocialkowski@bootlin.com>
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Checking for the number of planes is not sufficient to en ensure that
the format is a packed YUV422.

Use explicit fourcc helpers for the check instead.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
---
 drivers/gpu/drm/sun4i/sun4i_backend.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/sun4i/sun4i_backend.c b/drivers/gpu/drm/sun4i/sun4i_backend.c
index 52caf561da0e..30d7bc76c0af 100644
--- a/drivers/gpu/drm/sun4i/sun4i_backend.c
+++ b/drivers/gpu/drm/sun4i/sun4i_backend.c
@@ -238,7 +238,8 @@ static int sun4i_backend_update_yuv_format(struct sun4i_backend *backend,
 			   SUN4I_BACKEND_ATTCTL_REG0_LAY_YUVEN);
 
 	/* TODO: Add support for the multi-planar YUV formats */
-	if (format->num_planes == 1)
+	if (drm_format_info_is_yuv_packed(format) &&
+	    drm_format_info_is_yuv_sampling_422(format))
 		val |= SUN4I_BACKEND_IYUVCTL_FBFMT_PACKED_YUV422;
 	else
 		DRM_DEBUG_DRIVER("Unsupported YUV format (0x%x)\n", fmt);
-- 
2.19.1