linux-kernel - [PATCH 6/6] drm: bridge: dw-hdmi: Get output bus format when dw-hdmi is the only bridge

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Message-Id: <20200812083631.4411-1-algea.cao@rock-chips.com>
Date:   Wed, 12 Aug 2020 16:36:31 +0800
From:   Algea Cao <algea.cao@...k-chips.com>
To:     a.hajda@...sung.com, kuankuan.y@...il.com, hjc@...k-chips.com,
        tzimmermann@...e.de, dri-devel@...ts.freedesktop.org,
        sam@...nborg.org, airlied@...ux.ie, heiko@...ech.de,
        jernej.skrabec@...l.net, algea.cao@...k-chips.com,
        Laurent.pinchart@...asonboard.com,
        laurent.pinchart+renesas@...asonboard.com, jonas@...boo.se,
        mripard@...nel.org, darekm@...gle.com,
        linux-rockchip@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, cychiang@...omium.org,
        linux-kernel@...r.kernel.org, narmstrong@...libre.com,
        jbrunet@...libre.com, maarten.lankhorst@...ux.intel.com,
        daniel@...ll.ch
Subject: [PATCH 6/6] drm: bridge: dw-hdmi: Get output bus format when dw-hdmi is the only bridge

If plat_data->get_output_bus_format() is exist, we can
use it to get hdmi output bus format when dw-hdmi is the
only bridge. The hdmi output bus format can be set by vendor
properties.

Signed-off-by: Algea Cao <algea.cao@...k-chips.com>
---

 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 1eb4736b9b59..878e9e506963 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -2644,6 +2644,8 @@ static u32 *dw_hdmi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
 					unsigned int *num_output_fmts)
 {
 	struct drm_connector *conn = conn_state->connector;
+	struct dw_hdmi *hdmi = bridge->driver_private;
+	void *data = hdmi->plat_data->phy_data;
 	struct drm_display_info *info = &conn->display_info;
 	struct drm_display_mode *mode = &crtc_state->mode;
 	u8 max_bpc = conn_state->max_requested_bpc;
@@ -2662,7 +2664,11 @@ static u32 *dw_hdmi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
 	/* If dw-hdmi is the only bridge, avoid negociating with ourselves */
 	if (list_is_singular(&bridge->encoder->bridge_chain)) {
 		*num_output_fmts = 1;
-		output_fmts[0] = MEDIA_BUS_FMT_FIXED;
+		if (hdmi->plat_data->get_output_bus_format)
+			output_fmts[0] =
+				hdmi->plat_data->get_output_bus_format(data);
+		else
+			output_fmts[0] = MEDIA_BUS_FMT_FIXED;
 
 		return output_fmts;
 	}
-- 
2.25.1