diff options
| -rw-r--r-- | Documentation/gpu/drm-kms-helpers.rst | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/Makefile | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/drm_eld.c | 55 | ||||
| -rw-r--r-- | include/drm/drm_eld.h | 5 |
4 files changed, 64 insertions, 0 deletions
diff --git a/Documentation/gpu/drm-kms-helpers.rst b/Documentation/gpu/drm-kms-helpers.rst index cfa8e6c399b6..59cfe8a7a8ba 100644 --- a/Documentation/gpu/drm-kms-helpers.rst +++ b/Documentation/gpu/drm-kms-helpers.rst @@ -366,6 +366,9 @@ EDID Helper Functions Reference .. kernel-doc:: include/drm/drm_eld.h :internal: +.. kernel-doc:: drivers/gpu/drm/drm_eld.c + :export: + SCDC Helper Functions Reference =============================== diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index 8e1bde059170..cdbe91ac0bfc 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -22,6 +22,7 @@ drm-y := \ drm_drv.o \ drm_dumb_buffers.o \ drm_edid.o \ + drm_eld.o \ drm_encoder.o \ drm_file.o \ drm_fourcc.o \ diff --git a/drivers/gpu/drm/drm_eld.c b/drivers/gpu/drm/drm_eld.c new file mode 100644 index 000000000000..5177991aa272 --- /dev/null +++ b/drivers/gpu/drm/drm_eld.c @@ -0,0 +1,55 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright © 2023 Intel Corporation + */ + +#include <drm/drm_edid.h> +#include <drm/drm_eld.h> + +#include "drm_internal.h" + +/** + * drm_eld_sad_get - get SAD from ELD to struct cea_sad + * @eld: ELD buffer + * @sad_index: SAD index + * @cta_sad: destination struct cea_sad + * + * @return: 0 on success, or negative on errors + */ +int drm_eld_sad_get(const u8 *eld, int sad_index, struct cea_sad *cta_sad) +{ + const u8 *sad; + + if (sad_index >= drm_eld_sad_count(eld)) + return -EINVAL; + + sad = eld + DRM_ELD_CEA_SAD(drm_eld_mnl(eld), sad_index); + + drm_edid_cta_sad_set(cta_sad, sad); + + return 0; +} +EXPORT_SYMBOL(drm_eld_sad_get); + +/** + * drm_eld_sad_set - set SAD to ELD from struct cea_sad + * @eld: ELD buffer + * @sad_index: SAD index + * @cta_sad: source struct cea_sad + * + * @return: 0 on success, or negative on errors + */ +int drm_eld_sad_set(u8 *eld, int sad_index, const struct cea_sad *cta_sad) +{ + u8 *sad; + + if (sad_index >= drm_eld_sad_count(eld)) + return -EINVAL; + + sad = eld + DRM_ELD_CEA_SAD(drm_eld_mnl(eld), sad_index); + + drm_edid_cta_sad_get(cta_sad, sad); + + return 0; +} +EXPORT_SYMBOL(drm_eld_sad_set); diff --git a/include/drm/drm_eld.h b/include/drm/drm_eld.h index 7b674256b9aa..0a88d10b28b0 100644 --- a/include/drm/drm_eld.h +++ b/include/drm/drm_eld.h @@ -8,6 +8,8 @@ #include <linux/types.h> +struct cea_sad; + /* ELD Header Block */ #define DRM_ELD_HEADER_BLOCK_SIZE 4 @@ -75,6 +77,9 @@ static inline int drm_eld_mnl(const u8 *eld) return (eld[DRM_ELD_CEA_EDID_VER_MNL] & DRM_ELD_MNL_MASK) >> DRM_ELD_MNL_SHIFT; } +int drm_eld_sad_get(const u8 *eld, int sad_index, struct cea_sad *cta_sad); +int drm_eld_sad_set(u8 *eld, int sad_index, const struct cea_sad *cta_sad); + /** * drm_eld_sad - Get ELD SAD structures. * @eld: pointer to an eld memory structure with sad_count set |