[PATCH 2/3] drm/amdgpu: enable enable ABGR and XBGR formats

[Mauro Rossi <issor.oruam-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

Add support for DRM_FORMAT_{A,X}BGR8888 in amdgpu, for si and amd dc disabled
Here is it necessary to define and set crossbar registers
to swap red and blue channels

Signed-off-by: Mauro Rossi <issor.oruam@gmail.com>
---
 drivers/gpu/drm/amd/amdgpu/dce_v6_0.c | 10 ++++++++++
 drivers/gpu/drm/amd/amdgpu/si_enums.h | 20 ++++++++++++++++++++
 drivers/gpu/drm/amd/amdgpu/sid.h      | 20 ++++++++++++++++++++
 3 files changed, 50 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
index 394cc1e8fe20..f2c3f6676352 100644
--- a/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/dce_v6_0.c
@@ -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));
diff --git a/drivers/gpu/drm/amd/amdgpu/si_enums.h b/drivers/gpu/drm/amd/amdgpu/si_enums.h
index dc9e0e6b4558..790ba46eaebb 100644
--- a/drivers/gpu/drm/amd/amdgpu/si_enums.h
+++ b/drivers/gpu/drm/amd/amdgpu/si_enums.h
@@ -46,6 +46,26 @@
 #define GRPH_ENDIAN_8IN16              1
 #define GRPH_ENDIAN_8IN32              2
 #define GRPH_ENDIAN_8IN64              3
+#define GRPH_RED_CROSSBAR(x)           (((x) & 0x3) << 4)
+#define GRPH_RED_SEL_R                 0
+#define GRPH_RED_SEL_G                 1
+#define GRPH_RED_SEL_B                 2
+#define GRPH_RED_SEL_A                 3
+#define GRPH_GREEN_CROSSBAR(x)         (((x) & 0x3) << 6)
+#define GRPH_GREEN_SEL_G               0
+#define GRPH_GREEN_SEL_B               1
+#define GRPH_GREEN_SEL_A               2
+#define GRPH_GREEN_SEL_R               3
+#define GRPH_BLUE_CROSSBAR(x)          (((x) & 0x3) << 8)
+#define GRPH_BLUE_SEL_B                0
+#define GRPH_BLUE_SEL_A                1
+#define GRPH_BLUE_SEL_R                2
+#define GRPH_BLUE_SEL_G                3
+#define GRPH_ALPHA_CROSSBAR(x)         (((x) & 0x3) << 10)
+#define GRPH_ALPHA_SEL_A               0
+#define GRPH_ALPHA_SEL_R               1
+#define GRPH_ALPHA_SEL_G               2
+#define GRPH_ALPHA_SEL_B               3
 
 #define GRPH_DEPTH(x)                  (((x) & 0x3) << 0)
 #define GRPH_DEPTH_8BPP                0
diff --git a/drivers/gpu/drm/amd/amdgpu/sid.h b/drivers/gpu/drm/amd/amdgpu/sid.h
index c57eff159374..7cf12adb3915 100644
--- a/drivers/gpu/drm/amd/amdgpu/sid.h
+++ b/drivers/gpu/drm/amd/amdgpu/sid.h
@@ -2201,6 +2201,26 @@
 #       define EVERGREEN_GRPH_ENDIAN_8IN16              1
 #       define EVERGREEN_GRPH_ENDIAN_8IN32              2
 #       define EVERGREEN_GRPH_ENDIAN_8IN64              3
+#define EVERGREEN_GRPH_RED_CROSSBAR(x)           (((x) & 0x3) << 4)
+#       define EVERGREEN_GRPH_RED_SEL_R                 0
+#       define EVERGREEN_GRPH_RED_SEL_G                 1
+#       define EVERGREEN_GRPH_RED_SEL_B                 2
+#       define EVERGREEN_GRPH_RED_SEL_A                 3
+#define EVERGREEN_GRPH_GREEN_CROSSBAR(x)         (((x) & 0x3) << 6)
+#       define EVERGREEN_GRPH_GREEN_SEL_G               0
+#       define EVERGREEN_GRPH_GREEN_SEL_B               1
+#       define EVERGREEN_GRPH_GREEN_SEL_A               2
+#       define EVERGREEN_GRPH_GREEN_SEL_R               3
+#define EVERGREEN_GRPH_BLUE_CROSSBAR(x)          (((x) & 0x3) << 8)
+#       define EVERGREEN_GRPH_BLUE_SEL_B                0
+#       define EVERGREEN_GRPH_BLUE_SEL_A                1
+#       define EVERGREEN_GRPH_BLUE_SEL_R                2
+#       define EVERGREEN_GRPH_BLUE_SEL_G                3
+#define EVERGREEN_GRPH_ALPHA_CROSSBAR(x)         (((x) & 0x3) << 10)
+#       define EVERGREEN_GRPH_ALPHA_SEL_A               0
+#       define EVERGREEN_GRPH_ALPHA_SEL_R               1
+#       define EVERGREEN_GRPH_ALPHA_SEL_G               2
+#       define EVERGREEN_GRPH_ALPHA_SEL_B               3
 
 #define EVERGREEN_D3VGA_CONTROL                         0xf8
 #define EVERGREEN_D4VGA_CONTROL                         0xf9
-- 
2.17.1

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