Linux-PHY Archive on lore.kernel.org

* [PATCH] phy: rockchip: inno-hdmi: Change TMDS rate handling to configure() ops
From: Jonas Karlman @ 2026-05-03 17:29 UTC (permalink / raw)
  To: Vinod Koul, Neil Armstrong, Heiko Stuebner
  Cc: Jonas Karlman, linux-phy, linux-arm-kernel, linux-rockchip,
	linux-kernel

The commit 10ed34d6eaaf ("phy: Add HDMI configuration options")
introduced a way for HDMI PHYs to be configured through the generic
phy_configure() function.

This driver currently derives the TMDS character rate from the pixel
clock and the PHY bus width setting. However, no in-tree consumer of
this PHY has ever called phy_set_bus_width() to change the TMDS rate.

Change the TMDS character rate handling to depend on the configure() ops
before any PHY consumer needs to configure a TMDS character rate that is
different from the pixel clock rate.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
---
A near future drm/rockchip: dw_hdmi: series plans to include a call to
phy_configure() to configure this HDMI PHYs TMDS character rate.
---
 drivers/phy/rockchip/phy-rockchip-inno-hdmi.c | 30 ++++++++++---------
 1 file changed, 16 insertions(+), 14 deletions(-)

diff --git a/drivers/phy/rockchip/phy-rockchip-inno-hdmi.c b/drivers/phy/rockchip/phy-rockchip-inno-hdmi.c
index 1483907413fa..7f0563d4d482 100644
--- a/drivers/phy/rockchip/phy-rockchip-inno-hdmi.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-hdmi.c
@@ -245,6 +245,7 @@ struct inno_hdmi_phy {
 	struct clk *phyclk;
 	unsigned long pixclock;
 	unsigned long tmdsclock;
+	struct phy_configure_opts_hdmi hdmi_cfg;
 };
 
 struct pre_pll_config {
@@ -554,19 +555,10 @@ static inline void inno_update_bits(struct inno_hdmi_phy *inno, u8 reg,
 static unsigned long inno_hdmi_phy_get_tmdsclk(struct inno_hdmi_phy *inno,
 					       unsigned long rate)
 {
-	int bus_width = phy_get_bus_width(inno->phy);
-
-	switch (bus_width) {
-	case 4:
-	case 5:
-	case 6:
-	case 10:
-	case 12:
-	case 16:
-		return (u64)rate * bus_width / 8;
-	default:
-		return rate;
-	}
+	if (inno->hdmi_cfg.tmds_char_rate)
+		return inno->hdmi_cfg.tmds_char_rate;
+
+	return rate;
 }
 
 static irqreturn_t inno_hdmi_phy_rk3328_hardirq(int irq, void *dev_id)
@@ -602,6 +594,16 @@ static irqreturn_t inno_hdmi_phy_rk3328_irq(int irq, void *dev_id)
 	return IRQ_HANDLED;
 }
 
+static int inno_hdmi_phy_configure(struct phy *phy,
+				   union phy_configure_opts *opts)
+{
+	struct inno_hdmi_phy *inno = phy_get_drvdata(phy);
+
+	inno->hdmi_cfg = opts->hdmi;
+
+	return 0;
+}
+
 static int inno_hdmi_phy_power_on(struct phy *phy)
 {
 	struct inno_hdmi_phy *inno = phy_get_drvdata(phy);
@@ -668,6 +670,7 @@ static int inno_hdmi_phy_power_off(struct phy *phy)
 
 static const struct phy_ops inno_hdmi_phy_ops = {
 	.owner = THIS_MODULE,
+	.configure = inno_hdmi_phy_configure,
 	.power_on = inno_hdmi_phy_power_on,
 	.power_off = inno_hdmi_phy_power_off,
 };
@@ -1392,7 +1395,6 @@ static int inno_hdmi_phy_probe(struct platform_device *pdev)
 	}
 
 	phy_set_drvdata(inno->phy, inno);
-	phy_set_bus_width(inno->phy, 8);
 
 	if (inno->plat_data->ops->init) {
 		ret = inno->plat_data->ops->init(inno);
-- 
2.54.0


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