linux-kernel - [RFC 05/11] drm/bridge: synopsys: dw-hdmi: use negociated bus formats

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Date:   Tue, 20 Aug 2019 10:41:03 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     a.hajda@...sung.com, Laurent.pinchart@...asonboard.com,
        jonas@...boo.se, jernej.skrabec@...l.net,
        boris.brezillon@...labora.com
Cc:     Neil Armstrong <narmstrong@...libre.com>,
        linux-amlogic@...ts.infradead.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: [RFC 05/11] drm/bridge: synopsys: dw-hdmi: use negociated bus formats

Use the negociated bus formats from the atomic check function if
the input and output formats are non NULL, otherwise fallback to
the plat_data->input_bus_format or the default MEDIA_BUS_FMT_RGB888_1X24
bus format.

Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 121c2167ee20..316823abdd00 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1968,11 +1968,10 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
 	hdmi->hdmi_data.video_mode.mpixelrepetitionoutput = 0;
 	hdmi->hdmi_data.video_mode.mpixelrepetitioninput = 0;
 
-	/* TOFIX: Get input format from plat data or fallback to RGB888 */
 	if (hdmi->plat_data->input_bus_format)
 		hdmi->hdmi_data.enc_in_bus_format =
 			hdmi->plat_data->input_bus_format;
-	else
+	else if (!hdmi->hdmi_data.enc_in_bus_format)
 		hdmi->hdmi_data.enc_in_bus_format = MEDIA_BUS_FMT_RGB888_1X24;
 
 	/* TOFIX: Get input encoding from plat data or fallback to none */
@@ -1982,8 +1981,8 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
 	else
 		hdmi->hdmi_data.enc_in_encoding = V4L2_YCBCR_ENC_DEFAULT;
 
-	/* TOFIX: Default to RGB888 output format */
-	hdmi->hdmi_data.enc_out_bus_format = MEDIA_BUS_FMT_RGB888_1X24;
+	if (!hdmi->hdmi_data.enc_out_bus_format)
+		hdmi->hdmi_data.enc_out_bus_format = MEDIA_BUS_FMT_RGB888_1X24;
 
 	hdmi->hdmi_data.pix_repet_factor = 0;
 	hdmi->hdmi_data.hdcp_enable = 0;
@@ -2224,6 +2223,8 @@ static int dw_hdmi_bridge_atomic_check(struct drm_bridge *bridge,
 	dev_dbg(hdmi->dev, "selected output format %x\n",
 			bridge_state->output_bus_cfg.fmt);
 
+	hdmi->hdmi_data.enc_out_bus_format = bridge_state->output_bus_cfg.fmt;
+
 	ret = drm_atomic_bridge_choose_input_bus_cfg(bridge_state, crtc_state,
 						      conn_state);
 	if (ret)
@@ -2232,6 +2233,8 @@ static int dw_hdmi_bridge_atomic_check(struct drm_bridge *bridge,
 	dev_dbg(hdmi->dev, "selected input format %x\n",
 			bridge_state->input_bus_cfg.fmt);
 
+	hdmi->hdmi_data.enc_in_bus_format = bridge_state->input_bus_cfg.fmt;
+
 	return 0;
 }
 
-- 
2.22.0