amdgpu/display/display-manager.rst

8 .. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
11 .. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
17 .. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
20 .. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
26 .. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c
29 .. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_irq.c
32 .. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
38 .. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
41 .. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
47 .. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
50 .. kernel-doc:: drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c
55 ---------------------------------------------
60 pre-blending but DRM/KMS has not per-plane color correction properties.
63 CRTC gamma after blending, and CRTC degamma pre-blending. Although CTM is
64 programmed after blending, it is mapped to DPP hw blocks (pre-blending). Other
68 .. kernel-doc:: drivers/gpu/drm/amd/display/dc/dc.h
69    :doc: color-management-caps
71 .. kernel-doc:: drivers/gpu/drm/amd/display/dc/dc.h
81 .. kernel-figure:: dcn2_cm_drm_current.svg
85 .. kernel-figure:: dcn3_cm_drm_current.svg
102 - *fg.rgb*: Each of the RGB component values from the foreground's pixel.
103 - *fg.alpha*: Alpha component value from the foreground's pixel.
104 - *bg.rgb*: Each of the RGB component values from the background.
105 - *plane_alpha*: Plane alpha value set by the **plane "alpha" property**, see
110    out.rgb = alpha * fg.rgb + (1 - alpha) * bg.rgb
119 * **Pre-multiplied**: Blend formula that assumes the pixel color values in a
120   plane was already pre-multiplied by its own alpha channel before storage.
123   pre-multiplied with the alpha channel values.
125 and pre-multiplied is the default pixel blend mode, that means, when no blend
127 pre-multiplied color values. On IGT GPU tools, the kms_plane_alpha_blend test
130 The DRM blend mode and its elements are then mapped by AMDGPU display manager
134 .. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h
135    :doc: mpc-overview
137 .. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h
142 :c:type:`pre_multiplied_alpha` is the alpha pre-multiplied mode flag used to
144 multiplied (true/false), being only true for DRM pre-multiplied blend mode.
149 .. kernel-doc:: drivers/gpu/drm/amd/display/dc/inc/hw/mpc.h
158   be ignored and, therefore, pixel values are not pre-multiplied
167 pre-multiplied by alpha or not.
170 ------------------------
179    OS-agnostic component (DC).