Some connectors no matter if in- or output supports only a limited
range of tv norms. It doesn't matter if the hardware behind that
connector supports more than the listed formats since the users are
restriced by a label e.g. to plug only a camera into this connector
which uses the PAL format.
This patch adds the capability to describe such limitation within the
firmware. There are no format restrictions if the property isn't
present, so it's completely backward compatible.
Signed-off-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx>
Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
---
.../display/connector/analog-tv-connector.txt | 4 ++
include/dt-bindings/media/tvnorms.h | 42 +++++++++++++++++++
2 files changed, 46 insertions(+)
create mode 100644 include/dt-bindings/media/tvnorms.h
diff --git a/Documentation/devicetree/bindings/display/connector/analog-tv-connector.txt b/Documentation/devicetree/bindings/display/connector/analog-tv-connector.txt
index 0c0970c210ab..346f8937a0b7 100644
--- a/Documentation/devicetree/bindings/display/connector/analog-tv-connector.txt
+++ b/Documentation/devicetree/bindings/display/connector/analog-tv-connector.txt
@@ -6,6 +6,9 @@ Required properties:
Optional properties:
- label: a symbolic name for the connector
+- tvnorms: limit the supported tv norms on a connector to the given ones else
+ all tv norms are allowed. Possible video standards are defined in
+ include/dt-bindings/media/tvnorms.h.
Required nodes:
- Video port for TV input
@@ -16,6 +19,7 @@ Example
tv: connector {
compatible = "composite-video-connector";
label = "tv";
+ tvnorms = <(TVNORM_PAL_M | TVNORM_NTSC_M)>;
port {
tv_connector_in: endpoint {
diff --git a/include/dt-bindings/media/tvnorms.h b/include/dt-bindings/media/tvnorms.h
new file mode 100644
index 000000000000..ec3b414a7a00
--- /dev/null
+++ b/include/dt-bindings/media/tvnorms.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0-only or X11 */
+/*
+ * Copyright 2019 Pengutronix, Marco Felsch <kernel@xxxxxxxxxxxxxx>
+ */
+
+#ifndef _DT_BINDINGS_MEDIA_TVNORMS_H
+#define _DT_BINDINGS_MEDIA_TVNORMS_H
+
+/* one bit for each */
+#define TVNORM_PAL_B 0x00000001
+#define TVNORM_PAL_B1 0x00000002
+#define TVNORM_PAL_G 0x00000004
+#define TVNORM_PAL_H 0x00000008
+#define TVNORM_PAL_I 0x00000010
+#define TVNORM_PAL_D 0x00000020
+#define TVNORM_PAL_D1 0x00000040
+#define TVNORM_PAL_K 0x00000080
+
+#define TVNORM_PAL_M 0x00000100
+#define TVNORM_PAL_N 0x00000200
+#define TVNORM_PAL_Nc 0x00000400
+#define TVNORM_PAL_60 0x00000800
+
+#define TVNORM_NTSC_M 0x00001000 /* BTSC */
+#define TVNORM_NTSC_M_JP 0x00002000 /* EIA-J */
+#define TVNORM_NTSC_443 0x00004000
+#define TVNORM_NTSC_M_KR 0x00008000 /* FM A2 */
+
+#define TVNORM_SECAM_B 0x00010000
+#define TVNORM_SECAM_D 0x00020000
+#define TVNORM_SECAM_G 0x00040000
+#define TVNORM_SECAM_H 0x00080000
+#define TVNORM_SECAM_K 0x00100000
+#define TVNORM_SECAM_K1 0x00200000
+#define TVNORM_SECAM_L 0x00400000
+#define TVNORM_SECAM_LC 0x00800000
+
+/* ATSC/HDTV */
+#define TVNORM_ATSC_8_VSB 0x01000000
+#define TVNORM_ATSC_16_VSB 0x02000000
+
+#endif /* _DT_BINDINGS_MEDIA_TVNORMS_H */
--
2.20.1
