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edid: Fix up libdisplay-info support

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* The code did not compile before.
* Change the MetaEdidInfo struct to be more friendly to libdisplay-info
* Change to nit based luminance from encoded values

Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2896
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3116>
This commit is contained in:
Sebastian Wick 2023-07-11 16:27:55 +02:00
parent 4749c073eb
commit d382d55eae
4 changed files with 102 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

123
src/backends/edid-parse.c
View File

@ -30,6 +30,7 @@
#include <glib.h>
#ifdef HAVE_LIBDISPLAY_INFO
#include <libdisplay-info/cta.h>
#include <libdisplay-info/edid.h>
#include <libdisplay-info/info.h>
#endif
@ -78,16 +79,20 @@ static gboolean
decode_vendor_and_product_identification (const uint8_t *edid,
MetaEdidInfo *info)
{
/* Manufacturer Code */
info->manufacturer_code[0] = get_bits (edid[0x08], 2, 6);
info->manufacturer_code[1] = get_bits (edid[0x08], 0, 1) << 3;
info->manufacturer_code[1] |= get_bits (edid[0x09], 5, 7);
info->manufacturer_code[2] = get_bits (edid[0x09], 0, 4);
info->manufacturer_code[3] = '\0';
char manufacturer_code[4];
info->manufacturer_code[0] += 'A' - 1;
info->manufacturer_code[1] += 'A' - 1;
info->manufacturer_code[2] += 'A' - 1;
/* Manufacturer Code */
manufacturer_code[0] = get_bits (edid[0x08], 2, 6);
manufacturer_code[1] = get_bits (edid[0x08], 0, 1) << 3;
manufacturer_code[1] |= get_bits (edid[0x09], 5, 7);
manufacturer_code[2] = get_bits (edid[0x09], 0, 4);
manufacturer_code[3] = '\0';
manufacturer_code[0] += 'A' - 1;
manufacturer_code[1] += 'A' - 1;
manufacturer_code[2] += 'A' - 1;
info->manufacturer_code = g_strdup (manufacturer_code);
/* Product Code */
info->product_code = edid[0x0b] << 8 | edid[0x0a];
@ -143,27 +148,30 @@ decode_color_characteristics (const uint8_t *edid,
static void
decode_lf_string (const uint8_t *s,
int n_chars,
char *result)
char **result)
{
int i;
for (i = 0; i < n_chars; ++i)
char decoded[14] = { 0 };
for (i = 0; i < 13; ++i)
{
if (s[i] == 0x0a)
{
*result++ = '\0';
decoded[i] = '\0';
break;
}
else if (s[i] == 0x00)
{
/* Convert embedded 0's to spaces */
*result++ = ' ';
decoded[i] = ' ';
}
else
{
*result++ = s[i];
decoded[i] = s[i];
}
}
*result = g_strdup (decoded);
}
static void
@ -173,10 +181,10 @@ decode_display_descriptor (const uint8_t *desc,
switch (desc[0x03])
{
case 0xFC:
decode_lf_string (desc + 5, 13, info->dsc_product_name);
decode_lf_string (desc + 5, &info->dsc_product_name);
break;
case 0xFF:
decode_lf_string (desc + 5, 13, info->dsc_serial_number);
decode_lf_string (desc + 5, &info->dsc_serial_number);
break;
}
}
@ -210,6 +218,25 @@ decode_ext_cta_colorimetry (const uint8_t *data_block,
return TRUE;
}
static float
decode_max_luminance (uint8_t raw)
{
if (raw == 0)
return 0;
return 50 * powf (2, (float) raw / 32);
}
static float
decode_min_luminance (uint8_t raw,
float max)
{
if (raw == 0)
return 0;
return max * powf ((float) raw / 255, 2) / 100;
}
static gboolean
decode_ext_cta_hdr_static_metadata (const uint8_t *data_block,
MetaEdidInfo *info)
@ -223,11 +250,20 @@ decode_ext_cta_hdr_static_metadata (const uint8_t *data_block,
size = get_bits (data_block[0], 0, 5);
if (size > 3)
info->hdr_static_metadata.max_luminance = data_block[4];
{
info->hdr_static_metadata.max_luminance =
decode_max_luminance (data_block[4]);
}
if (size > 4)
info->hdr_static_metadata.max_fal = data_block[5];
{
info->hdr_static_metadata.max_fal = decode_max_luminance (data_block[5]);
}
if (size > 5)
info->hdr_static_metadata.min_luminance = data_block[6];
{
info->hdr_static_metadata.min_luminance =
decode_min_luminance (data_block[6],
info->hdr_static_metadata.max_luminance);
}
return TRUE;
}
@ -331,10 +367,14 @@ decode_edid_descriptors (const struct di_edid *di_edid,
switch (desc_tag)
{
case DI_EDID_DISPLAY_DESCRIPTOR_PRODUCT_SERIAL:
info->dsc_serial_number = di_edid_display_descriptor_get_string (desc);
info->dsc_serial_number =
g_strdup (di_edid_display_descriptor_get_string (desc));
break;
case DI_EDID_DISPLAY_DESCRIPTOR_PRODUCT_NAME:
info->dsc_product_name = di_edid_display_descriptor_get_string (desc);
info->dsc_product_name =
g_strdup (di_edid_display_descriptor_get_string (desc));
break;
default:
break;
}
}
@ -384,12 +424,22 @@ decode_edid_hdr_static_metadata (const struct di_cta_hdr_static_metadata_block *
info->hdr_static_metadata.sm |= META_EDID_STATIC_METADATA_TYPE1;
if (hdr->desired_content_max_luminance != 0)
info->hdr_static_metadata.max_luminance = round (hdr->desired_content_max_luminance);
if (hdr->desired_content_max_frame_avg_luminance != 0)
info->hdr_static_metadata.max_fal = hdr->desired_content_max_frame_avg_luminance;
if (hdr->desired_content_min_luminance != 0)
info->hdr_static_metadata.min_luminance = round (hdr->desired_content_min_luminance);
{
info->hdr_static_metadata.max_luminance =
hdr->desired_content_max_luminance;
}
if (hdr->desired_content_max_frame_avg_luminance != 0)
{
info->hdr_static_metadata.max_fal =
hdr->desired_content_max_frame_avg_luminance;
}
if (hdr->desired_content_min_luminance != 0)
{
info->hdr_static_metadata.min_luminance =
hdr->desired_content_min_luminance;
}
}
static void
decode_edid_cta_ext (const struct di_edid_cta *cta,
MetaEdidInfo *info)
@ -399,6 +449,7 @@ decode_edid_cta_ext (const struct di_edid_cta *cta,
enum di_cta_data_block_tag data_blk_tag;
const struct di_cta_colorimetry_block *colorimetry;
const struct di_cta_hdr_static_metadata_block *hdr_static_metadata;
size_t data_index;
data_blks = di_edid_cta_get_data_blocks (cta);
for (data_index = 0; data_blks[data_index] != NULL; data_index++)
@ -411,13 +462,16 @@ decode_edid_cta_ext (const struct di_edid_cta *cta,
case DI_CTA_DATA_BLOCK_COLORIMETRY:
colorimetry = di_cta_data_block_get_colorimetry (data_blk);
g_assert (colorimetry);
decode_edid_colorimetry (colorimetry, info)
decode_edid_colorimetry (colorimetry, info);
break;
case DI_CTA_DATA_BLOCK_HDR_STATIC_METADATA:
hdr_static_metadata = di_cta_data_block_get_hdr_static_metadata (data_blk);
hdr_static_metadata =
di_cta_data_block_get_hdr_static_metadata (data_blk);
g_assert (hdr_static_metadata);
decode_edid_hdr_static_metadata (hdr_static_metadata, info);
break;
default:
break;
}
}
}
@ -436,6 +490,8 @@ decode_edid_extensions (const struct di_edid_ext *ext,
cta = di_edid_ext_get_cta (ext);
decode_edid_cta_ext (cta, info);
break;
default:
break;
}
}
#endif
@ -453,6 +509,8 @@ decode_edid_info (const uint8_t *edid,
float gamma;
const struct di_edid_display_descriptor *const *edid_descriptors;
const struct di_edid_ext *const *extensions;
size_t desc_index;
size_t ext_index;
edid_info = di_info_parse_edid (edid, size);
@ -467,8 +525,7 @@ decode_edid_info (const uint8_t *edid,
vendor_product = di_edid_get_vendor_product (di_edid);
/* Manufacturer Code */
strncpy (info->manufacturer_code, vendor_product->manufacturer,
sizeof(info->manufacturer_code));
info->manufacturer_code = g_strdup (vendor_product->manufacturer);
/* Product Code */
info->product_code = vendor_product->product;
@ -496,7 +553,7 @@ decode_edid_info (const uint8_t *edid,
/* Descriptors */
edid_descriptors = di_edid_get_display_descriptors (di_edid);
for (desc_index = 0; edid_descriptors[desc_index] != NULL; i++)
for (desc_index = 0; edid_descriptors[desc_index] != NULL; desc_index++)
{
decode_edid_descriptors (di_edid, edid_descriptors[desc_index], info);
}
@ -504,7 +561,7 @@ decode_edid_info (const uint8_t *edid,
/* Extension Blocks */
extensions = di_edid_get_extensions (di_edid);
for (ext_index = 0; extensions[ext_index] != NULL; i++)
for (ext_index = 0; extensions[ext_index] != NULL; ext_index++)
{
decode_edid_extensions (extensions[ext_index], info);
}

7
src/backends/edid.h
View File

@ -69,7 +69,7 @@ struct _MetaEdidHdrStaticMetadata
struct _MetaEdidInfo
{
char manufacturer_code[4];
char *manufacturer_code;
int product_code;
unsigned int serial_number;
@ -85,9 +85,8 @@ struct _MetaEdidInfo
double white_y;
/* Optional product description */
char dsc_serial_number[14];
char dsc_product_name[14];
char dsc_string[14]; /* Unspecified ASCII data */
char *dsc_serial_number;
char *dsc_product_name;
MetaEdidColorimetry colorimetry;
MetaEdidHdrStaticMetadata hdr_static_metadata;

6
src/backends/meta-output.c
View File

@ -325,11 +325,11 @@ static void
set_output_details_from_edid (MetaOutputInfo *output_info,
MetaEdidInfo *edid_info)
{
output_info->vendor = g_strndup (edid_info->manufacturer_code, 4);
output_info->vendor = g_strdup (edid_info->manufacturer_code);
if (!g_utf8_validate (output_info->vendor, -1, NULL))
g_clear_pointer (&output_info->vendor, g_free);
output_info->product = g_strndup (edid_info->dsc_product_name, 14);
output_info->product = g_strdup (edid_info->dsc_product_name);
if (!g_utf8_validate (output_info->product, -1, NULL) ||
output_info->product[0] == '\0')
{
@ -338,7 +338,7 @@ set_output_details_from_edid (MetaOutputInfo *output_info,
g_strdup_printf ("0x%04x", (unsigned) edid_info->product_code);
}
output_info->serial = g_strndup (edid_info->dsc_serial_number, 14);
output_info->serial = g_strdup (edid_info->dsc_serial_number);
if (!g_utf8_validate (output_info->serial, -1, NULL) ||
output_info->serial[0] == '\0')
{

2
src/tests/edid-tests.c
View File

@ -71,7 +71,7 @@ main (int argc,
g_assert (edid_info != NULL);
g_assert (strcmp (edid_info->manufacturer_code, "GSM") == 0);
g_assert (edid_info->product_code == 23507);
g_assert (edid_info->hdr_static_metadata.max_luminance == 97);
g_assert (edid_info->hdr_static_metadata.max_luminance == 408);
g_assert (edid_info->hdr_static_metadata.tf ==
(META_EDID_TF_TRADITIONAL_GAMMA_SDR | META_EDID_TF_PQ));
g_assert (edid_info->colorimetry ==