From: Joshua Ashton <jos...@froggi.es> Multiplier to 'gain' the plane. When PQ is decoded using the fixed func transfer function to the internal FP16 fb, 1.0 -> 80 nits (on AMD at least) When sRGB is decoded, 1.0 -> 1.0. Therefore, 1.0 multiplier = 80 nits for SDR content. So if you want, 203 nits for SDR content, pass in (203.0 / 80.0).
Co-developed-by: Melissa Wen <m...@igalia.com> Signed-off-by: Melissa Wen <m...@igalia.com> Signed-off-by: Joshua Ashton <jos...@froggi.es> --- drivers/gpu/drm/amd/amdgpu/amdgpu_display.c | 6 +++++ drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | 4 +++ .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 12 +++++++++ .../amd/display/amdgpu_dm/amdgpu_dm_plane.c | 25 ++++++++++++++----- 4 files changed, 41 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c index 24595906dab1..dd658f162f6f 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c @@ -1326,6 +1326,12 @@ amdgpu_display_create_color_properties(struct amdgpu_device *adev) return -ENOMEM; adev->mode_info.plane_degamma_tf_property = prop; + prop = drm_property_create_range(adev_to_drm(adev), + 0, "AMD_PLANE_HDR_MULT", 0, UINT_MAX); + if (!prop) + return -ENOMEM; + adev->mode_info.plane_hdr_mult_property = prop; + return 0; } #endif diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h index ab9ce6f26c90..65a9d62ffbe4 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h @@ -387,6 +387,10 @@ struct amdgpu_mode_info { * linearize content with or without LUT. */ struct drm_property *plane_degamma_tf_property; + /** + * @plane_hdr_mult_property: + */ + struct drm_property *plane_hdr_mult_property; #endif }; diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h index 005632c1c9ec..bb7307b9cfd5 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h @@ -51,6 +51,7 @@ #define AMDGPU_DMUB_NOTIFICATION_MAX 5 +#define AMDGPU_HDR_MULT_DEFAULT (0x100000000LL) /* #include "include/amdgpu_dal_power_if.h" #include "amdgpu_dm_irq.h" @@ -736,6 +737,17 @@ struct dm_plane_state { * linearize. */ enum drm_transfer_function degamma_tf; + /** + * @hdr_mult: + * + * Multiplier to 'gain' the plane. When PQ is decoded using the fixed + * func transfer function to the internal FP16 fb, 1.0 -> 80 nits (on + * AMD at least). When sRGB is decoded, 1.0 -> 1.0, obviously. + * Therefore, 1.0 multiplier = 80 nits for SDR content. So if you + * want, 203 nits for SDR content, pass in (203.0 / 80.0). Format is + * S31.32 sign-magnitude. + */ + __u64 hdr_mult; #endif }; diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c index 5b458cc0781c..57169dae8b3d 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c @@ -1321,8 +1321,10 @@ static void dm_drm_plane_reset(struct drm_plane *plane) __drm_atomic_helper_plane_reset(plane, &amdgpu_state->base); #ifdef CONFIG_STEAM_DECK - if (amdgpu_state) + if (amdgpu_state) { amdgpu_state->degamma_tf = DRM_TRANSFER_FUNCTION_DEFAULT; + amdgpu_state->hdr_mult = AMDGPU_HDR_MULT_DEFAULT; + } #endif } @@ -1424,11 +1426,11 @@ static void dm_drm_plane_destroy_state(struct drm_plane *plane, #ifdef CONFIG_STEAM_DECK int amdgpu_dm_replace_property_blob_from_id(struct drm_device *dev, - struct drm_property_blob **blob, - uint64_t blob_id, - ssize_t expected_size, - ssize_t expected_elem_size, - bool *replaced) + struct drm_property_blob **blob, + uint64_t blob_id, + ssize_t expected_size, + ssize_t expected_elem_size, + bool *replaced) { struct drm_property_blob *new_blob = NULL; @@ -1482,6 +1484,10 @@ dm_plane_attach_color_mgmt_properties(struct amdgpu_display_manager *dm, dm->adev->mode_info.plane_degamma_tf_property, DRM_TRANSFER_FUNCTION_DEFAULT); } + /* HDR MULT is always available */ + drm_object_attach_property(&plane->base, + dm->adev->mode_info.plane_hdr_mult_property, + AMDGPU_HDR_MULT_DEFAULT); } static int @@ -1507,6 +1513,11 @@ dm_atomic_plane_set_property(struct drm_plane *plane, dm_plane_state->degamma_tf = val; dm_plane_state->base.color_mgmt_changed = 1; } + } else if (property == adev->mode_info.plane_hdr_mult_property) { + if (dm_plane_state->hdr_mult != val) { + dm_plane_state->hdr_mult = val; + dm_plane_state->base.color_mgmt_changed = 1; + } } else { drm_dbg_atomic(plane->dev, "[PLANE:%d:%s] unknown property [PROP:%d:%s]]\n", @@ -1533,6 +1544,8 @@ dm_atomic_plane_get_property(struct drm_plane *plane, dm_plane_state->degamma_lut->base.id : 0; } else if (property == adev->mode_info.plane_degamma_tf_property) { *val = dm_plane_state->degamma_tf; + } else if (property == adev->mode_info.plane_hdr_mult_property) { + *val = dm_plane_state->hdr_mult; } else { return -EINVAL; } -- 2.39.2