linux-kernel - [PATCH RFC 5/8] drm/bridge: dw-hdmi: support dynamically get input/out color info

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Message-Id: <20181123140221.15700-6-narmstrong@baylibre.com>
Date:   Fri, 23 Nov 2018 15:02:18 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     architt@...eaurora.org, a.hajda@...sung.com,
        Laurent.pinchart@...asonboard.com
Cc:     Zheng Yang <zhengyang@...k-chips.com>,
        dri-devel@...ts.freedesktop.org, linux-amlogic@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        Neil Armstrong <narmstrong@...libre.com>
Subject: [PATCH RFC 5/8] drm/bridge: dw-hdmi: support dynamically get input/out color info

From: Zheng Yang <zhengyang@...k-chips.com>

To get input/output bus_format/enc_format dynamically, this patch
introduce following funstion in plat_data:
	- get_input_bus_format
	- get_output_bus_format
	- get_enc_in_encoding
	- get_enc_out_encoding

Signed-off-by: Zheng Yang <zhengyang@...k-chips.com>
Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
---
 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 28 +++++++++++++++++------
 include/drm/bridge/dw_hdmi.h              |  5 ++++
 2 files changed, 26 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 0b07bda73ffd..b38ec1d775aa 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -1763,6 +1763,7 @@ static void hdmi_disable_overflow_interrupts(struct dw_hdmi *hdmi)
 static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
 {
 	int ret;
+	void *data = hdmi->plat_data->phy_data;
 
 	hdmi_disable_overflow_interrupts(hdmi);
 
@@ -1774,10 +1775,13 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
 		dev_dbg(hdmi->dev, "CEA mode used vic=%d\n", hdmi->vic);
 	}
 
-	if ((hdmi->vic == 6) || (hdmi->vic == 7) ||
-	    (hdmi->vic == 21) || (hdmi->vic == 22) ||
-	    (hdmi->vic == 2) || (hdmi->vic == 3) ||
-	    (hdmi->vic == 17) || (hdmi->vic == 18))
+	if (hdmi->plat_data->get_enc_out_encoding)
+		hdmi->hdmi_data.enc_out_encoding =
+			hdmi->plat_data->get_enc_out_encoding(data);
+	else if ((hdmi->vic == 6) || (hdmi->vic == 7) ||
+		 (hdmi->vic == 21) || (hdmi->vic == 22) ||
+		 (hdmi->vic == 2) || (hdmi->vic == 3) ||
+		 (hdmi->vic == 17) || (hdmi->vic == 18))
 		hdmi->hdmi_data.enc_out_encoding = V4L2_YCBCR_ENC_601;
 	else
 		hdmi->hdmi_data.enc_out_encoding = V4L2_YCBCR_ENC_709;
@@ -1786,21 +1790,31 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
 	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)
+	if (hdmi->plat_data->get_input_bus_format)
+		hdmi->hdmi_data.enc_in_bus_format =
+			hdmi->plat_data->get_input_bus_format(data);
+	else if (hdmi->plat_data->input_bus_format)
 		hdmi->hdmi_data.enc_in_bus_format =
 			hdmi->plat_data->input_bus_format;
 	else
 		hdmi->hdmi_data.enc_in_bus_format = MEDIA_BUS_FMT_RGB888_1X24;
 
 	/* TOFIX: Get input encoding from plat data or fallback to none */
-	if (hdmi->plat_data->input_bus_encoding)
+	if (hdmi->plat_data->get_enc_in_encoding)
+		hdmi->hdmi_data.enc_in_encoding =
+			hdmi->plat_data->get_enc_in_encoding(data);
+	else if (hdmi->plat_data->input_bus_encoding)
 		hdmi->hdmi_data.enc_in_encoding =
 			hdmi->plat_data->input_bus_encoding;
 	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->plat_data->get_output_bus_format)
+		hdmi->hdmi_data.enc_out_bus_format =
+			hdmi->plat_data->get_output_bus_format(data);
+	else
+		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;
diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index d7cc5d094270..27f9cce66b6a 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -141,6 +141,11 @@ struct dw_hdmi_plat_data {
 	int (*configure_phy)(struct dw_hdmi *hdmi,
 			     const struct dw_hdmi_plat_data *pdata,
 			     unsigned long mpixelclock);
+
+	unsigned long (*get_input_bus_format)(void *data);
+	unsigned long (*get_output_bus_format)(void *data);
+	unsigned long (*get_enc_in_encoding)(void *data);
+	unsigned long (*get_enc_out_encoding)(void *data);
 };
 
 struct dw_hdmi *dw_hdmi_probe(struct platform_device *pdev,
-- 
2.19.1