[Intel-gfx] [PATCH 1/3] lib/igt_kms: Add support for 4K and audio HDMI EDID injection.
Marius Vlad
marius.c.vlad at intel.com
Tue Feb 2 13:03:36 UTC 2016
Signed-off-by: Marius Vlad <marius.c.vlad at intel.com>
---
lib/igt_kms.c | 176 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
lib/igt_kms.h | 2 +
2 files changed, 178 insertions(+)
diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index 90c8da7..64aa5d1 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -858,6 +858,182 @@ void kmstest_edid_add_3d(const unsigned char *edid, size_t length,
}
/**
+ * kmstest_edid_add_4k:
+ * @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
+ * a HDMI 4K mode in vsdb.
+ */
+void kmstest_edid_add_4k(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 = 12;
+
+ 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++] = 0x00; /* 3D present */
+
+ /* HDMI MODE LEN -- how many entries */
+ new_edid[pos++] = 0x20;
+ /* 2160p, specified as short descriptor */
+ new_edid[pos++] = 0x01;
+
+
+ /* checksum */
+ sum = 0;
+ for (i = 0; i < 127; i++) {
+ sum = sum + new_edid[length + i];
+ }
+ new_edid[length + 127] = 256 - sum;
+}
+
+/**
+ * kmstest_edid_add_audio:
+ * @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
+ * basic audio support.
+ *
+ */
+void kmstest_edid_add_audio(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 = 12;
+ char audio_block_len = 4;
+
+ 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 + audio_block_len +
+ video_block_len + vsdb_block_len;
+ new_edid[pos++] = (1 << 6); /* support basic audio */
+
+ /* audio block, short audio block descriptors */
+ new_edid[pos++] = (1 << 5) | (audio_block_len - 1);
+ new_edid[pos++] = 0x09; /* Audio Format, PCM */
+ new_edid[pos++] = 0x07; /* Frequency, 32, 44.1, 48kHz */
+ new_edid[pos++] = 0x07; /* Bit Rate 16, 20, 24 bit */
+
+ /* 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 ) -- need vsdb as well
+ * otherwise the kernel will fallback to lower clock modes */
+ 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++] = 0x00; /* 3D present */
+
+
+ /* 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
* @resources: libdrm resources pointer
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index 3f7add5..1f79f55 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -132,6 +132,8 @@ enum kmstest_force_connector_state {
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_edid_add_4k(const unsigned char *edid, size_t length, unsigned char *new_edid_ptr[], size_t *new_length);
+void kmstest_edid_add_audio(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);
--
2.7.0.rc3
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