linux-kernel - [PATCH RFC v3 25/37] drm/rockchip: inno_hdmi: Remove tmds rate from structure

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Message-Id: <20231031-kms-hdmi-connector-state-v3-25-328b0fae43a7@kernel.org>
Date:   Tue, 31 Oct 2023 17:48:38 +0100
From:   Maxime Ripard <mripard@...nel.org>
To:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>, Emma Anholt <emma@...olt.net>,
        Jonathan Corbet <corbet@....net>,
        Sandy Huang <hjc@...k-chips.com>,
        Heiko Stübner <heiko@...ech.de>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>
Cc:     Hans Verkuil <hverkuil@...all.nl>, dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        linux-rockchip@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        Maxime Ripard <mripard@...nel.org>
Subject: [PATCH RFC v3 25/37] 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@...nel.org>
---
 drivers/gpu/drm/rockchip/inno_hdmi.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/inno_hdmi.c b/drivers/gpu/drm/rockchip/inno_hdmi.c
index f05417c6b637..35f44e556fcf 100644
--- a/drivers/gpu/drm/rockchip/inno_hdmi.c
+++ b/drivers/gpu/drm/rockchip/inno_hdmi.c
@@ -50,8 +50,6 @@ struct inno_hdmi {
 
 	struct inno_hdmi_i2c *i2c;
 	struct i2c_adapter *ddc;
-
-	unsigned int tmds_rate;
 };
 
 static struct inno_hdmi *encoder_to_inno_hdmi(struct drm_encoder *encoder)
@@ -155,11 +153,11 @@ 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);
@@ -389,8 +387,7 @@ 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,
@@ -768,8 +765,7 @@ 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)

-- 
2.41.0