drm/amd/display: Add DCN3 HUBHUB

Add support to program the HUBBUB (DCN memory HUB interface)

HW Blocks:

 +--------+
 | HUBBUB |
 +--------+
        |
        v
    +--------+
    |  DPP   |
    +--------+
        |
        v
    +--------+
    |  MPC   |
    +--------+
        |
        v
    +-------+
    |  OPP  |
    +-------+
        |
        v
    +--------+
    |  OPTC  |
    +--------+
        |
        v
    +--------+       +--------+
    |  DIO   |       |  DCCG  |
    +--------+       +--------+

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dc.h

@@ -186,6 +186,15 @@ struct dc_dcc_setting {
 	unsigned int max_compressed_blk_size;
 	unsigned int max_uncompressed_blk_size;
 	bool independent_64b_blks;
+#if defined(CONFIG_DRM_AMD_DC_DCN3_0)
+	//These bitfields to be used starting with DCN 3.0
+	struct {
+		uint32_t dcc_256_64_64 : 1;//available in ASICs before DCN 3.0 (the worst compression case)
+		uint32_t dcc_128_128_uncontrained : 1;  //available in ASICs before DCN 3.0
+		uint32_t dcc_256_128_128 : 1;		//available starting with DCN 3.0
+		uint32_t dcc_256_256_unconstrained : 1;  //available in ASICs before DCN 3.0 (the best compression case)
+	} dcc_controls;
+#endif
 };
 
 struct dc_surface_dcc_cap {

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hubbub.c

@@ -153,6 +153,10 @@ bool hubbub2_dcc_support_pixel_format(
 	case SURFACE_PIXEL_FORMAT_GRPH_BGR101111_FIX:
 	case SURFACE_PIXEL_FORMAT_GRPH_RGB111110_FLOAT:
 	case SURFACE_PIXEL_FORMAT_GRPH_BGR101111_FLOAT:
+#if defined(CONFIG_DRM_AMD_DC_DCN3_0)
+	case SURFACE_PIXEL_FORMAT_GRPH_RGBE:
+	case SURFACE_PIXEL_FORMAT_GRPH_RGBE_ALPHA:
+#endif
 		*bytes_per_element = 4;
 		return true;
 	case SURFACE_PIXEL_FORMAT_GRPH_ARGB16161616:
@@ -339,6 +343,11 @@ static enum dcn_hubbub_page_table_block_size page_table_block_size_to_hw(unsigne
 	case 65536:
 		block_size = DCN_PAGE_TABLE_BLOCK_SIZE_64KB;
 		break;
+#if defined(CONFIG_DRM_AMD_DC_DCN3_0)
+	case 32768:
+		block_size = DCN_PAGE_TABLE_BLOCK_SIZE_32KB;
+		break;
+#endif
 	default:
 		ASSERT(false);
 		block_size = page_table_block_size;