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media: vivid: vidioc_g_edid: do not change the original input EDID

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Returning an EDID for a connected output would modify the original
input EDID with the physical address of the output. That causes
problems, and it should just update the physical address of the
output EDID.

Update vivid_hdmi_edid to set the physical address to 0.0.0.0.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
This commit is contained in:
Hans Verkuil 2024-06-24 12:52:58 +03:00
parent 0bc9574a7a
commit e03549dd02
2 changed files with 22 additions and 4 deletions
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4
drivers/media/test-drivers/vivid/vivid-core.c
View File

@ -218,7 +218,7 @@ static const u8 vivid_hdmi_edid[256] = {
0x5e, 0x5d, 0x10, 0x1f, 0x04, 0x13, 0x22, 0x21,
0x20, 0x05, 0x14, 0x02, 0x11, 0x01, 0x23, 0x09,
0x07, 0x07, 0x83, 0x01, 0x00, 0x00, 0x6d, 0x03,
0x0c, 0x00, 0x10, 0x00, 0x00, 0x3c, 0x21, 0x00,
0x0c, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x21, 0x00,
0x60, 0x01, 0x02, 0x03, 0x67, 0xd8, 0x5d, 0xc4,
0x01, 0x78, 0x00, 0x00, 0xe2, 0x00, 0xca, 0xe3,
0x05, 0x00, 0x00, 0xe3, 0x06, 0x01, 0x00, 0x4d,
@ -229,7 +229,7 @@ static const u8 vivid_hdmi_edid[256] = {
0x00, 0x00, 0x1a, 0x1a, 0x1d, 0x00, 0x80, 0x51,
0xd0, 0x1c, 0x20, 0x40, 0x80, 0x35, 0x00, 0xc0,
0x1c, 0x32, 0x00, 0x00, 0x1c, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x82,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x92,
};
static int vidioc_querycap(struct file *file, void *priv,

22
drivers/media/test-drivers/vivid/vivid-vid-common.c
View File

@ -1038,6 +1038,7 @@ int vidioc_g_edid(struct file *file, void *_fh,
struct vivid_dev *dev = video_drvdata(file);
struct video_device *vdev = video_devdata(file);
struct cec_adapter *adap;
unsigned int loc;
memset(edid->reserved, 0, sizeof(edid->reserved));
if (vdev->vfl_dir == VFL_DIR_RX) {
@ -1068,8 +1069,25 @@ int vidioc_g_edid(struct file *file, void *_fh,
return -EINVAL;
if (edid->blocks > dev->edid_blocks - edid->start_block)
edid->blocks = dev->edid_blocks - edid->start_block;
if (adap)
v4l2_set_edid_phys_addr(dev->edid, dev->edid_blocks * 128, adap->phys_addr);
memcpy(edid->edid, dev->edid + edid->start_block * 128, edid->blocks * 128);
loc = cec_get_edid_spa_location(dev->edid, dev->edid_blocks * 128);
if (vdev->vfl_dir == VFL_DIR_TX && adap && loc &&
loc >= edid->start_block * 128 &&
loc < (edid->start_block + edid->blocks) * 128) {
unsigned int i;
u8 sum = 0;
loc -= edid->start_block * 128;
edid->edid[loc] = adap->phys_addr >> 8;
edid->edid[loc + 1] = adap->phys_addr & 0xff;
loc &= ~0x7f;
/* update the checksum */
for (i = loc; i < loc + 127; i++)
sum += edid->edid[i];
edid->edid[i] = 256 - sum;
}
return 0;
}