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path: root/drivers/video/hdmi.c
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Diffstat (limited to 'drivers/video/hdmi.c')
-rw-r--r--drivers/video/hdmi.c51
1 files changed, 31 insertions, 20 deletions
diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c
index 1cf907ecded4..111a0ab6280a 100644
--- a/drivers/video/hdmi.c
+++ b/drivers/video/hdmi.c
@@ -321,6 +321,17 @@ int hdmi_vendor_infoframe_init(struct hdmi_vendor_infoframe *frame)
}
EXPORT_SYMBOL(hdmi_vendor_infoframe_init);
+static int hdmi_vendor_infoframe_length(const struct hdmi_vendor_infoframe *frame)
+{
+ /* for side by side (half) we also need to provide 3D_Ext_Data */
+ if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
+ return 6;
+ else if (frame->vic != 0 || frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID)
+ return 5;
+ else
+ return 4;
+}
+
/**
* hdmi_vendor_infoframe_pack() - write a HDMI vendor infoframe to binary buffer
* @frame: HDMI infoframe
@@ -341,19 +352,11 @@ ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
u8 *ptr = buffer;
size_t length;
- /* empty info frame */
- if (frame->vic == 0 && frame->s3d_struct == HDMI_3D_STRUCTURE_INVALID)
- return -EINVAL;
-
/* only one of those can be supplied */
if (frame->vic != 0 && frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID)
return -EINVAL;
- /* for side by side (half) we also need to provide 3D_Ext_Data */
- if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
- frame->length = 6;
- else
- frame->length = 5;
+ frame->length = hdmi_vendor_infoframe_length(frame);
length = HDMI_INFOFRAME_HEADER_SIZE + frame->length;
@@ -372,14 +375,16 @@ ssize_t hdmi_vendor_infoframe_pack(struct hdmi_vendor_infoframe *frame,
ptr[5] = 0x0c;
ptr[6] = 0x00;
- if (frame->vic) {
- ptr[7] = 0x1 << 5; /* video format */
- ptr[8] = frame->vic;
- } else {
+ if (frame->s3d_struct != HDMI_3D_STRUCTURE_INVALID) {
ptr[7] = 0x2 << 5; /* video format */
ptr[8] = (frame->s3d_struct & 0xf) << 4;
if (frame->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF)
ptr[9] = (frame->s3d_ext_data & 0xf) << 4;
+ } else if (frame->vic) {
+ ptr[7] = 0x1 << 5; /* video format */
+ ptr[8] = frame->vic;
+ } else {
+ ptr[7] = 0x0 << 5; /* video format */
}
hdmi_infoframe_set_checksum(buffer, length);
@@ -1165,7 +1170,7 @@ hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe *frame,
if (ptr[0] != HDMI_INFOFRAME_TYPE_VENDOR ||
ptr[1] != 1 ||
- (ptr[2] != 5 && ptr[2] != 6))
+ (ptr[2] != 4 && ptr[2] != 5 && ptr[2] != 6))
return -EINVAL;
length = ptr[2];
@@ -1193,16 +1198,22 @@ hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe *frame,
hvf->length = length;
- if (hdmi_video_format == 0x1) {
- hvf->vic = ptr[4];
- } else if (hdmi_video_format == 0x2) {
+ if (hdmi_video_format == 0x2) {
+ if (length != 5 && length != 6)
+ return -EINVAL;
hvf->s3d_struct = ptr[4] >> 4;
if (hvf->s3d_struct >= HDMI_3D_STRUCTURE_SIDE_BY_SIDE_HALF) {
- if (length == 6)
- hvf->s3d_ext_data = ptr[5] >> 4;
- else
+ if (length != 6)
return -EINVAL;
+ hvf->s3d_ext_data = ptr[5] >> 4;
}
+ } else if (hdmi_video_format == 0x1) {
+ if (length != 5)
+ return -EINVAL;
+ hvf->vic = ptr[4];
+ } else {
+ if (length != 4)
+ return -EINVAL;
}
return 0;