linux-kernel - [PATCH 01/12] phy: hdmi: Add HDMI 2.1 FRL configuration options

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Message-Id: <20250708-phy-hdptx-frl-v1-1-cfe096e224f4@collabora.com>
Date: Tue, 08 Jul 2025 22:35:42 +0300
From: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
To: Vinod Koul <vkoul@...nel.org>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, 
 Heiko Stuebner <heiko@...ech.de>, Algea Cao <algea.cao@...k-chips.com>
Cc: kernel@...labora.com, linux-phy@...ts.infradead.org, 
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 linux-rockchip@...ts.infradead.org
Subject: [PATCH 01/12] phy: hdmi: Add HDMI 2.1 FRL configuration options

Add support for configuring the Fixed Rate Link (FRL) mode for HDMI
PHYs.

For improved clarity, also rename existing HDMI mode to HDMI_TMDS.
Since this mode is currently not being used explicitly, no further
changes are needed.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
---
 include/linux/phy/phy-hdmi.h | 14 ++++++++++++--
 include/linux/phy/phy.h      |  3 ++-
 2 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/include/linux/phy/phy-hdmi.h b/include/linux/phy/phy-hdmi.h
index f0ec963c6e84f1b7728acafc824dff191c6b873d..0b26472d8defcc9ded142d4283e29861dc2b3746 100644
--- a/include/linux/phy/phy-hdmi.h
+++ b/include/linux/phy/phy-hdmi.h
@@ -6,16 +6,26 @@
 #ifndef __PHY_HDMI_H_
 #define __PHY_HDMI_H_
 
+#include <linux/types.h>
+
 /**
  * struct phy_configure_opts_hdmi - HDMI configuration set
- * @tmds_char_rate: HDMI TMDS Character Rate in Hertz.
  * @bpc: Bits per color channel.
+ * @tmds_char_rate: HDMI TMDS Character Rate in Hertz.
+ * @frl.rate_per_lane: HDMI FRL Rate per Lane in Gbps.
+ * @frl.lanes: HDMI FRL lanes count.
  *
  * This structure is used to represent the configuration state of a HDMI phy.
  */
 struct phy_configure_opts_hdmi {
-	unsigned long long tmds_char_rate;
 	unsigned int bpc;
+	union {
+		unsigned long long tmds_char_rate;
+		struct {
+			u8 rate_per_lane;
+			u8 lanes;
+		} frl;
+	};
 };
 
 #endif /* __PHY_HDMI_H_ */
diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h
index 13add0c2c40721fe9ca3f0350d13c035cd25af45..04c84c1dbd6dac55fd04c54203cff4f9d939d970 100644
--- a/include/linux/phy/phy.h
+++ b/include/linux/phy/phy.h
@@ -44,7 +44,8 @@ enum phy_mode {
 	PHY_MODE_SATA,
 	PHY_MODE_LVDS,
 	PHY_MODE_DP,
-	PHY_MODE_HDMI,
+	PHY_MODE_HDMI_TMDS,
+	PHY_MODE_HDMI_FRL,
 };
 
 enum phy_media {

-- 
2.50.0