drm/rockchip: inno_hdmi: Remove tmds rate from structure

The tmds_rate field in the inno_hdmi structure is used mostly to
configure the internal i2c controller divider through a call to the
inno_hdmi_i2c_init() function.

We can simply make that rate an argument to that function, which also
removes a workaround to initialize the divider at probe time when we
don't have a mode yet.
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Tested-by: Alex Bee <knaerzche@gmail.com>
Signed-off-by: Alex Bee <knaerzche@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20231222174220.55249-13-knaerzche@gmail.com

drivers/gpu/drm/rockchip/inno_hdmi.c

@@ -55,8 +55,6 @@ struct inno_hdmi {
 	struct inno_hdmi_i2c *i2c;
 	struct i2c_adapter *ddc;
 
-	unsigned int tmds_rate;
-
 	struct hdmi_data_info	hdmi_data;
 };
 
@@ -133,11 +131,11 @@ static inline void hdmi_modb(struct inno_hdmi *hdmi, u16 offset,
 	hdmi_writeb(hdmi, offset, temp);
 }
 
-static void inno_hdmi_i2c_init(struct inno_hdmi *hdmi)
+static void inno_hdmi_i2c_init(struct inno_hdmi *hdmi, unsigned long long rate)
 {
-	int ddc_bus_freq;
+	unsigned long long ddc_bus_freq = rate >> 2;
 
-	ddc_bus_freq = (hdmi->tmds_rate >> 2) / HDMI_SCL_RATE;
+	do_div(ddc_bus_freq, 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);
@@ -420,8 +418,7 @@ 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_hdmi_i2c_init(hdmi);
+	inno_hdmi_i2c_init(hdmi, mode->clock * 1000);
 
 	/* Unmute video and audio output */
 	hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_VIDEO_BLACK,
@@ -799,8 +796,7 @@ static int inno_hdmi_bind(struct device *dev, struct device *master,
 	 * 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);
+	inno_hdmi_i2c_init(hdmi, clk_get_rate(hdmi->pclk));
 
 	ret = inno_hdmi_register(drm, hdmi);
 	if (ret)