From: Cristian Ciocaltea Date: Thu, 29 Jan 2026 12:13:32 +0000 (+0200) Subject: drm/bridge: dw-hdmi-qp: Provide HDMI Vendor Specific InfoFrame X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=e54c6ac22a8fda74401b2d8c4857728a1ffddb64;p=thirdparty%2Flinux.git drm/bridge: dw-hdmi-qp: Provide HDMI Vendor Specific InfoFrame Since commit b626b1a1c9cc ("drm/bridge: refactor HDMI InfoFrame callbacks"), the following warning is generated: [ 13.654149] rockchip-drm display-subsystem: [drm] HDMI VSI not supported Add the missing support for sending HDMI Vendor-Specific Infoframes. Additionally, introduce dw_hdmi_qp_write_{pkt|infoframe}() helpers, as a prerequisite to rework all dw_hdmi_qp_bridge_write_*_infoframe() callbacks and get rid of some boilerplate code. Signed-off-by: Cristian Ciocaltea Reviewed-by: Maxime Ripard Reviewed-by: Daniel Stone Link: https://patch.msgid.link/20260129-dw-hdmi-qp-iframe-v2-1-0157ad05232c@collabora.com Signed-off-by: Daniel Stone --- diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c index 036316e2b60dc..93aae1d8027dc 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c @@ -11,6 +11,7 @@ #include #include #include +#include #include #include #include @@ -969,9 +970,9 @@ static int dw_hdmi_qp_bridge_clear_avi_infoframe(struct drm_bridge *bridge) static int dw_hdmi_qp_bridge_clear_hdmi_infoframe(struct drm_bridge *bridge) { - /* FIXME: add support for this InfoFrame */ + struct dw_hdmi_qp *hdmi = bridge->driver_private; - drm_warn_once(bridge->encoder->dev, "HDMI VSI not supported\n"); + dw_hdmi_qp_mod(hdmi, 0, PKTSCHED_VSI_TX_EN, PKTSCHED_PKT_EN); return 0; } @@ -998,6 +999,32 @@ static int dw_hdmi_qp_bridge_clear_audio_infoframe(struct drm_bridge *bridge) return 0; } +static void dw_hdmi_qp_write_pkt(struct dw_hdmi_qp *hdmi, const u8 *buffer, + size_t start, size_t len, unsigned int reg) +{ + u32 val = 0; + size_t i; + + for (i = start; i < start + len; i++) + val |= buffer[i] << ((i % 4) * BITS_PER_BYTE); + + dw_hdmi_qp_write(hdmi, val, reg); +} + +static void dw_hdmi_qp_write_infoframe(struct dw_hdmi_qp *hdmi, const u8 *buffer, + size_t len, unsigned int reg) +{ + size_t i; + + /* InfoFrame packet header */ + dw_hdmi_qp_write_pkt(hdmi, buffer, 1, 2, reg); + + /* InfoFrame packet body */ + for (i = 0; i < len - 3; i += 4) + dw_hdmi_qp_write_pkt(hdmi, buffer + 3, i, min(len - i - 3, 4), + reg + i + 4); +} + static int dw_hdmi_qp_bridge_write_avi_infoframe(struct drm_bridge *bridge, const u8 *buffer, size_t len) { @@ -1011,9 +1038,15 @@ static int dw_hdmi_qp_bridge_write_avi_infoframe(struct drm_bridge *bridge, static int dw_hdmi_qp_bridge_write_hdmi_infoframe(struct drm_bridge *bridge, const u8 *buffer, size_t len) { + struct dw_hdmi_qp *hdmi = bridge->driver_private; + dw_hdmi_qp_bridge_clear_hdmi_infoframe(bridge); - /* FIXME: add support for the HDMI VSI */ + dw_hdmi_qp_write_infoframe(hdmi, buffer, len, PKT_VSI_CONTENTS0); + + dw_hdmi_qp_mod(hdmi, 0, PKTSCHED_VSI_FIELDRATE, PKTSCHED_PKT_CONFIG1); + dw_hdmi_qp_mod(hdmi, PKTSCHED_VSI_TX_EN, PKTSCHED_VSI_TX_EN, + PKTSCHED_PKT_EN); return 0; } diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.h b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.h index 91a15f82e32ac..53688eae8dba6 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.h +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.h @@ -198,6 +198,7 @@ #define PKTSCHED_PRQUEUE2_CONFIG2 0xa94 #define PKTSCHED_PKT_CONFIG0 0xa98 #define PKTSCHED_PKT_CONFIG1 0xa9c +#define PKTSCHED_VSI_FIELDRATE BIT(14) #define PKTSCHED_DRMI_FIELDRATE BIT(13) #define PKTSCHED_AVI_FIELDRATE BIT(12) #define PKTSCHED_PKT_CONFIG2 0xaa0 @@ -206,6 +207,7 @@ #define PKTSCHED_DRMI_TX_EN BIT(17) #define PKTSCHED_AUDI_TX_EN BIT(15) #define PKTSCHED_AVI_TX_EN BIT(13) +#define PKTSCHED_VSI_TX_EN BIT(12) #define PKTSCHED_EMP_CVTEM_TX_EN BIT(10) #define PKTSCHED_AMD_TX_EN BIT(8) #define PKTSCHED_GCP_TX_EN BIT(3)