linux-kernel - [PATCH v2 19/27] drm/rockchip: inno_hdmi: Move tmds rate to connector state subclass

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Message-ID: <20231216162639.125215-20-knaerzche@gmail.com>
Date: Sat, 16 Dec 2023 17:26:30 +0100
From: Alex Bee <knaerzche@...il.com>
To: Sandy Huang <hjc@...k-chips.com>,
	Heiko Stübner <heiko@...ech.de>,
	Andy Yan <andyshrk@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>
Cc: David Airlie <airlied@...il.com>,
	Daniel Vetter <daniel@...ll.ch>,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-rockchip@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Alex Bee <knaerzche@...il.com>
Subject: [PATCH v2 19/27] drm/rockchip: inno_hdmi: Move tmds rate to connector state subclass

Similar to the othter members of inno_hdmi_connector_state the tmds_rate is
not a property of the device, but of the connector state. Move it to
inno_hdmi_connector_state and make it a long to comply with the clock
framework. To get arround the issue of not having the connector state when
inno_hdmi_i2c_init is called in the bind path, getting the tmds rate is
wrapped in function which returns the fallback rate if the connector
doesn't have a state yet.

Signed-off-by: Alex Bee <knaerzche@...il.com>
---
changes in v2:
 - new patch

 drivers/gpu/drm/rockchip/inno_hdmi.c | 36 +++++++++++++++++++---------
 1 file changed, 25 insertions(+), 11 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/inno_hdmi.c b/drivers/gpu/drm/rockchip/inno_hdmi.c
index f9bfae1e97a2..6799d24501b8 100644
--- a/drivers/gpu/drm/rockchip/inno_hdmi.c
+++ b/drivers/gpu/drm/rockchip/inno_hdmi.c
@@ -47,14 +47,13 @@ struct inno_hdmi {
 
 	struct inno_hdmi_i2c *i2c;
 	struct i2c_adapter *ddc;
-
-	unsigned int tmds_rate;
 };
 
 struct inno_hdmi_connector_state {
 	struct drm_connector_state	base;
 	unsigned int			enc_out_format;
 	unsigned int			colorimetry;
+	unsigned long			tmds_rate;
 };
 
 static struct inno_hdmi *encoder_to_inno_hdmi(struct drm_encoder *encoder)
@@ -133,11 +132,33 @@ static inline void hdmi_modb(struct inno_hdmi *hdmi, u16 offset,
 	hdmi_writeb(hdmi, offset, temp);
 }
 
+static unsigned long inno_hdmi_tmds_rate(struct inno_hdmi *hdmi)
+{
+	struct drm_connector *connector = &hdmi->connector;
+	struct drm_connector_state *conn_state =  connector->state;
+	struct inno_hdmi_connector_state *inno_conn_state;
+
+	if (conn_state) {
+		inno_conn_state = to_inno_hdmi_conn_state(conn_state);
+		return inno_conn_state->tmds_rate;
+	}
+
+	/*
+	 * When IP controller haven't configured to an accurate video
+	 * timing, then the TMDS clock source would be switched to
+	 * PCLK_HDMI, so we need to init the TMDS rate to PCLK rate,
+	 * and reconfigure the DDC clock.
+	 */
+
+	return clk_get_rate(hdmi->pclk);
+}
+
 static void inno_hdmi_i2c_init(struct inno_hdmi *hdmi)
 {
 	int ddc_bus_freq;
+	unsigned long tmds_rate = inno_hdmi_tmds_rate(hdmi);
 
-	ddc_bus_freq = (hdmi->tmds_rate >> 2) / HDMI_SCL_RATE;
+	ddc_bus_freq = (tmds_rate >> 2) / HDMI_SCL_RATE;
 
 	hdmi_writeb(hdmi, DDC_BUS_FREQ_L, ddc_bus_freq & 0xFF);
 	hdmi_writeb(hdmi, DDC_BUS_FREQ_H, (ddc_bus_freq >> 8) & 0xFF);
@@ -431,7 +452,7 @@ static int inno_hdmi_setup(struct inno_hdmi *hdmi,
 	 * DCLK_LCDC, so we need to init the TMDS rate to mode pixel
 	 * clock rate, and reconfigure the DDC clock.
 	 */
-	hdmi->tmds_rate = mode->clock * 1000;
+	inno_conn_state->tmds_rate = mode->clock * 1000;
 	inno_hdmi_i2c_init(hdmi);
 
 	/* Unmute video and audio output */
@@ -823,13 +844,6 @@ static int inno_hdmi_bind(struct device *dev, struct device *master,
 		goto err_disable_clk;
 	}
 
-	/*
-	 * When IP controller haven't configured to an accurate video
-	 * timing, then the TMDS clock source would be switched to
-	 * PCLK_HDMI, so we need to init the TMDS rate to PCLK rate,
-	 * and reconfigure the DDC clock.
-	 */
-	hdmi->tmds_rate = clk_get_rate(hdmi->pclk);
 	inno_hdmi_i2c_init(hdmi);
 
 	ret = inno_hdmi_register(drm, hdmi);
-- 
2.43.0