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drm/amdgpu: enable ABGR and XBGR formats (v2)

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Add support for DRM_FORMAT_{A,X}BGR8888 in amdgpu with amd dc disabled

(v2) Crossbar registers are defined and used to swap red and blue channels,
     keeping the existing coding style in each of the dce modules.
     After setting crossbar bits in fb_swap, use bitwise OR for big endian
     where required in DCE6 and DCE8 which do not rely on REG_SET_FIELD()

Signed-off-by: Mauro Rossi <issor.oruam@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Mauro Rossi
2018-08-12 21:43:02 +02:00
committed by Alex Deucher
parent bcd47f60ab
commit 00ecc6e6d4
6 changed files with 82 additions and 0 deletions
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10
drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
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@@ -1888,6 +1888,16 @@ static int dce_v6_0_crtc_do_set_base(struct drm_crtc *crtc,
/* Greater 8 bpc fb needs to bypass hw-lut to retain precision */
bypass_lut = true;
break;
case DRM_FORMAT_XBGR8888:
case DRM_FORMAT_ABGR8888:
fb_format = (GRPH_DEPTH(GRPH_DEPTH_32BPP) |
GRPH_FORMAT(GRPH_FORMAT_ARGB8888));
fb_swap = (GRPH_RED_CROSSBAR(GRPH_RED_SEL_B) |
GRPH_BLUE_CROSSBAR(GRPH_BLUE_SEL_R));
#ifdef __BIG_ENDIAN
fb_swap |= GRPH_ENDIAN_SWAP(GRPH_ENDIAN_8IN32);
#endif
break;
default:
DRM_ERROR("Unsupported screen format %s\n",
drm_get_format_name(target_fb->format->format, &format_name));