weston/libweston/backend-drm/kms-color.c

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/*
* Copyright 2021-2022 Collabora, Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "config.h"
#include <stdint.h>
#include <libweston/libweston.h>
#include <assert.h>
#include <string.h>
#include <math.h>
#include "drm-internal.h"
#include "libdrm-updates.h"
static inline uint16_t
color_xy_to_u16(float v)
{
assert(v >= 0.0f);
assert(v <= 1.0f);
/*
* CTA-861-G
* 6.9.1 Static Metadata Type 1
* chromaticity coordinate encoding
*/
return (uint16_t)round(v * 50000.0);
}
static inline uint16_t
nits_to_u16(float nits)
{
assert(nits >= 1.0f);
assert(nits <= 65535.0f);
/*
* CTA-861-G
* 6.9.1 Static Metadata Type 1
* max display mastering luminance, max content light level,
* max frame-average light level
*/
return (uint16_t)round(nits);
}
static inline uint16_t
nits_to_u16_dark(float nits)
{
assert(nits >= 0.0001f);
assert(nits <= 6.5535f);
/*
* CTA-861-G
* 6.9.1 Static Metadata Type 1
* min display mastering luminance
*/
return (uint16_t)round(nits * 10000.0);
}
static void
weston_hdr_metadata_type1_to_kms(struct hdr_metadata_infoframe *dst,
const struct weston_hdr_metadata_type1 *src)
{
if (src->group_mask & WESTON_HDR_METADATA_TYPE1_GROUP_PRIMARIES) {
unsigned i;
for (i = 0; i < 3; i++) {
dst->display_primaries[i].x = color_xy_to_u16(src->primary[i].x);
dst->display_primaries[i].y = color_xy_to_u16(src->primary[i].y);
}
}
if (src->group_mask & WESTON_HDR_METADATA_TYPE1_GROUP_WHITE) {
dst->white_point.x = color_xy_to_u16(src->white.x);
dst->white_point.y = color_xy_to_u16(src->white.y);
}
if (src->group_mask & WESTON_HDR_METADATA_TYPE1_GROUP_MAXDML)
dst->max_display_mastering_luminance = nits_to_u16(src->maxDML);
if (src->group_mask & WESTON_HDR_METADATA_TYPE1_GROUP_MINDML)
dst->min_display_mastering_luminance = nits_to_u16_dark(src->minDML);
if (src->group_mask & WESTON_HDR_METADATA_TYPE1_GROUP_MAXCLL)
dst->max_cll = nits_to_u16(src->maxCLL);
if (src->group_mask & WESTON_HDR_METADATA_TYPE1_GROUP_MAXFALL)
dst->max_fall = nits_to_u16(src->maxFALL);
}
int
drm_output_ensure_hdr_output_metadata_blob(struct drm_output *output)
{
struct drm_device *device = output->device;
const struct weston_hdr_metadata_type1 *src;
struct hdr_output_metadata meta;
uint32_t blob_id = 0;
int ret;
if (output->hdr_output_metadata_blob_id &&
output->ackd_color_outcome_serial == output->base.color_outcome_serial)
return 0;
src = weston_output_get_hdr_metadata_type1(&output->base);
/*
* Set up the data for Dynamic Range and Mastering InfoFrame,
* CTA-861-G, a.k.a the static HDR metadata.
*/
memset(&meta, 0, sizeof meta);
meta.metadata_type = 0; /* Static Metadata Type 1 */
/* Duplicated field in UABI struct */
meta.hdmi_metadata_type1.metadata_type = meta.metadata_type;
switch (output->base.eotf_mode) {
case WESTON_EOTF_MODE_NONE:
assert(0 && "bad eotf_mode: none");
return -1;
case WESTON_EOTF_MODE_SDR:
/*
* Do not send any static HDR metadata. Video sinks should
* respond by switching to traditional SDR mode. If they
* do not, the kernel should fix that up.
*/
assert(output->hdr_output_metadata_blob_id == 0);
return 0;
case WESTON_EOTF_MODE_TRADITIONAL_HDR:
meta.hdmi_metadata_type1.eotf = 1; /* from CTA-861-G */
break;
case WESTON_EOTF_MODE_ST2084:
meta.hdmi_metadata_type1.eotf = 2; /* from CTA-861-G */
weston_hdr_metadata_type1_to_kms(&meta.hdmi_metadata_type1, src);
break;
case WESTON_EOTF_MODE_HLG:
meta.hdmi_metadata_type1.eotf = 3; /* from CTA-861-G */
break;
}
if (meta.hdmi_metadata_type1.eotf == 0) {
assert(0 && "bad eotf_mode");
return -1;
}
ret = drmModeCreatePropertyBlob(device->drm.fd,
&meta, sizeof meta, &blob_id);
if (ret != 0) {
weston_log("Error: failed to create KMS blob for HDR metadata on output '%s': %s\n",
output->base.name, strerror(-ret));
return -1;
}
drmModeDestroyPropertyBlob(device->drm.fd,
output->hdr_output_metadata_blob_id);
output->hdr_output_metadata_blob_id = blob_id;
output->ackd_color_outcome_serial = output->base.color_outcome_serial;
return 0;
}