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lib: add kmstest_edid_add_3d

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kmstest_edid_add_3d adds an EDID extension block with 3D support to a
copy of the specified EDID.

v2: Avoid using an invalid CEC SPA (Clint Taylor)

Signed-off-by: Thomas Wood <thomas.wood@intel.com>
This commit is contained in:
Thomas Wood 2014-07-30 11:10:49 +01:00
parent 4a604dee60
commit a124b1a430
2 changed files with 81 additions and 0 deletions
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80
lib/igt_kms.c
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@ -648,6 +648,86 @@ kmstest_get_property(int drm_fd, uint32_t object_id, uint32_t object_type,
return found;
}
/**
* kmstest_edid_add_3d:
* @edid: an existing valid edid block
* @length: length of @edid
* @new_edid_ptr: pointer to where the new edid will be placed
* @new_length: pointer to the size of the new edid
*
* Makes a copy of an existing edid block and adds an extension indicating
* stereo 3D capabilities.
*/
void kmstest_edid_add_3d(const unsigned char *edid, size_t length,
unsigned char *new_edid_ptr[], size_t *new_length)
{
unsigned char *new_edid;
int n_extensions;
char sum = 0;
int pos;
int i;
char cea_header_len = 4, video_block_len = 6, vsdb_block_len = 11;
igt_assert(new_edid_ptr != NULL && new_length != NULL);
*new_length = length + 128;
new_edid = calloc(*new_length, sizeof(char));
memcpy(new_edid, edid, length);
*new_edid_ptr = new_edid;
n_extensions = new_edid[126];
n_extensions++;
new_edid[126] = n_extensions;
/* recompute checksum */
for (i = 0; i < 127; i++) {
sum = sum + new_edid[i];
}
new_edid[127] = 256 - sum;
/* add a cea-861 extension block */
pos = length;
new_edid[pos++] = 0x2;
new_edid[pos++] = 0x3;
new_edid[pos++] = cea_header_len + video_block_len + vsdb_block_len;
new_edid[pos++] = 0x0;
/* video block (id | length) */
new_edid[pos++] = 2 << 5 | (video_block_len - 1);
new_edid[pos++] = 32 | 0x80; /* 1080p @ 24Hz | (native)*/
new_edid[pos++] = 5; /* 1080i @ 60Hz */
new_edid[pos++] = 20; /* 1080i @ 50Hz */
new_edid[pos++] = 4; /* 720p @ 60Hz*/
new_edid[pos++] = 19; /* 720p @ 50Hz*/
/* vsdb block ( id | length ) */
new_edid[pos++] = 3 << 5 | (vsdb_block_len - 1);
/* registration id */
new_edid[pos++] = 0x3;
new_edid[pos++] = 0xc;
new_edid[pos++] = 0x0;
/* source physical address */
new_edid[pos++] = 0x10;
new_edid[pos++] = 0x00;
/* Supports_AI ... etc */
new_edid[pos++] = 0x00;
/* Max TMDS Clock */
new_edid[pos++] = 0x00;
/* Latency present, HDMI Video Present */
new_edid[pos++] = 0x20;
/* HDMI Video */
new_edid[pos++] = 0x80;
new_edid[pos++] = 0x00;
/* checksum */
sum = 0;
for (i = 0; i < 127; i++) {
sum = sum + new_edid[length + i];
}
new_edid[length + 127] = 256 - sum;
}
/**
* kmstest_unset_all_crtcs:
* @drm_fd: the DRM fd

1
lib/igt_kms.h
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@ -149,6 +149,7 @@ enum kmstest_generic_edid {
bool kmstest_force_connector(int fd, drmModeConnector *connector,
enum kmstest_force_connector_state state);
void kmstest_edid_add_3d(const unsigned char *edid, size_t length, unsigned char *new_edid_ptr[], size_t *new_length);
void kmstest_force_edid(int drm_fd, drmModeConnector *connector,
const unsigned char *edid, size_t length);