From: Joshua Ashton <joshua@xxxxxxxxx> 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). Signed-off-by: Joshua Ashton <joshua@xxxxxxxxx> Co-developed-by: Melissa Wen <mwen@xxxxxxxxxx> Signed-off-by: Melissa Wen <mwen@xxxxxxxxxx> --- drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h | 4 ++++ drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 14 ++++++++++++++ .../drm/amd/display/amdgpu_dm/amdgpu_dm_color.c | 6 ++++++ .../drm/amd/display/amdgpu_dm/amdgpu_dm_plane.c | 13 +++++++++++++ 4 files changed, 37 insertions(+) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h index 6ef958a14e16..66bae0eed80c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h @@ -359,6 +359,10 @@ struct amdgpu_mode_info { * to go from scanout/encoded values to linear values. */ struct drm_property *plane_degamma_tf_property; + /** + * @plane_hdr_mult_property: + */ + struct drm_property *plane_hdr_mult_property; }; #define AMDGPU_MAX_BL_LEVEL 0xFF 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 f6251ed89684..44f17ac11a5f 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h @@ -54,6 +54,9 @@ #define HDMI_AMD_VENDOR_SPECIFIC_DATA_BLOCK_IEEE_REGISTRATION_ID 0x00001A #define AMD_VSDB_VERSION_3_FEATURECAP_REPLAYMODE 0x40 #define HDMI_AMD_VENDOR_SPECIFIC_DATA_BLOCK_VERSION_3 0x3 + +#define AMDGPU_HDR_MULT_DEFAULT (0x100000000LL) + /* #include "include/amdgpu_dal_power_if.h" #include "amdgpu_dm_irq.h" @@ -755,6 +758,17 @@ struct dm_plane_state { * linearize. */ enum amdgpu_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; }; struct dm_crtc_state { diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c index 7f13bcdaf016..b891aaf5f7c1 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c @@ -203,6 +203,12 @@ amdgpu_dm_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, U64_MAX); + if (!prop) + return -ENOMEM; + adev->mode_info.plane_hdr_mult_property = prop; + return 0; } #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 0a955abb1abf..ab7f0332c431 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 @@ -1331,6 +1331,7 @@ static void dm_drm_plane_reset(struct drm_plane *plane) __drm_atomic_helper_plane_reset(plane, &amdgpu_state->base); amdgpu_state->degamma_tf = AMDGPU_TRANSFER_FUNCTION_DEFAULT; + amdgpu_state->hdr_mult = AMDGPU_HDR_MULT_DEFAULT; } static struct drm_plane_state * @@ -1354,6 +1355,7 @@ dm_drm_plane_duplicate_state(struct drm_plane *plane) drm_property_blob_get(dm_plane_state->degamma_lut); dm_plane_state->degamma_tf = old_dm_plane_state->degamma_tf; + dm_plane_state->hdr_mult = old_dm_plane_state->hdr_mult; return &dm_plane_state->base; } @@ -1450,6 +1452,10 @@ dm_atomic_plane_attach_color_mgmt_properties(struct amdgpu_display_manager *dm, dm->adev->mode_info.plane_degamma_tf_property, AMDGPU_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 @@ -1476,6 +1482,11 @@ 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", @@ -1501,6 +1512,8 @@ 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; } -- 2.40.1