[PATCH v10 07/10] drm/mediatek: mtk_hdmi_common: Add OP_HDMI if helper funcs assigned

[Louis-Alexis Eyraud]

From: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>

In preparation for adding the HDMI TX v2 driver, and to allow
a future modernization of the HDMI v1 one, perform changes
that enable the usage of the HDMI Helpers provided by DRM.

Check if the HDMI driver provides the function pointers to
hdmi_{clear,write}_infoframe used by the HDMI Helper API and,
if present, add DRM_BRIDGE_OP_HDMI to the drm_bridge ops,
enabling the drm API to register the bridge as HDMI and to use
the HDMI Helper functions.

If the hdmi_{write,clear}_infoframe pointers are not assigned,
vendor and product strings and HDMI helpers will not be used,
hence this commit brings no functional changes to drivers that
have not been refactored to use the new helpers.

This also means that, in the current state, there is effectively
no functional change to mtk_hdmi and its other components.

Reviewed-by: CK Hu <ck.hu at mediatek.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud at collabora.com>
---
 drivers/gpu/drm/mediatek/mtk_hdmi_common.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi_common.c b/drivers/gpu/drm/mediatek/mtk_hdmi_common.c
index 3b589706d61b1e0e4aa66d0c81253b8aeb70c0d3..be63f33d39bfd4625a5f1edd83c873cc20ac0018 100644
--- a/drivers/gpu/drm/mediatek/mtk_hdmi_common.c
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi_common.c
@@ -413,6 +413,10 @@ struct mtk_hdmi *mtk_hdmi_common_probe(struct platform_device *pdev)
 	hdmi->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID
 			 | DRM_BRIDGE_OP_HPD;
 
+	if (ver_conf->bridge_funcs->hdmi_write_infoframe &&
+	    ver_conf->bridge_funcs->hdmi_clear_infoframe)
+		hdmi->bridge.ops |= DRM_BRIDGE_OP_HDMI;
+
 	hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
 	hdmi->bridge.ddc = hdmi->ddc_adpt;
 	hdmi->bridge.vendor = "MediaTek";

-- 
2.50.1