drm/amd/display: expand plane caps to include fp16 and scaling capability

[why]
there are some scaling capabilities such as fp16 which are known to be unsupported
on a given ASIC.  exposing these static capabilities allows much simpler implementation
for OS interfaces which require to report such static capabilities to reduce the
number of dynamic validation calls

[how]
refactor the existing plane caps to be more extensible, and add fp16 and scaling
capabilities
Signed-off-by: Jun Lei <Jun.Lei@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet Lakha@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -2085,7 +2085,7 @@ static int amdgpu_dm_initialize_drm_device(struct amdgpu_device *adev)
 		if (!plane->blends_with_above || !plane->blends_with_below)
 			continue;
 
-		if (!plane->supports_argb8888)
+		if (!plane->pixel_format_support.argb8888)
 			continue;
 
 		if (initialize_plane(dm, NULL, primary_planes + i,
@@ -4142,7 +4142,7 @@ static int get_plane_formats(const struct drm_plane *plane,
 			formats[num_formats++] = rgb_formats[i];
 		}
 
-		if (plane_cap && plane_cap->supports_nv12)
+		if (plane_cap && plane_cap->pixel_format_support.nv12)
 			formats[num_formats++] = DRM_FORMAT_NV12;
 		break;
 
@@ -4196,7 +4196,7 @@ static int amdgpu_dm_plane_init(struct amdgpu_display_manager *dm,
 	}
 
 	if (plane->type == DRM_PLANE_TYPE_PRIMARY &&
-	    plane_cap && plane_cap->supports_nv12) {
+	    plane_cap && plane_cap->pixel_format_support.nv12) {
 		/* This only affects YUV formats. */
 		drm_plane_create_color_properties(
 			plane,

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

@@ -66,8 +66,27 @@ struct dc_plane_cap {
 	uint32_t blends_with_above : 1;
 	uint32_t blends_with_below : 1;
 	uint32_t per_pixel_alpha : 1;
-	uint32_t supports_argb8888 : 1;
-	uint32_t supports_nv12 : 1;
+	struct {
+		uint32_t argb8888 : 1;
+		uint32_t nv12 : 1;
+		uint32_t fp16 : 1;
+	} pixel_format_support;
+	// max upscaling factor x1000
+	// upscaling factors are always >= 1
+	// for example, 1080p -> 8K is 4.0, or 4000 raw value
+	struct {
+		uint32_t argb8888;
+		uint32_t nv12;
+		uint32_t fp16;
+	} max_upscale_factor;
+	// max downscale factor x1000
+	// downscale factors are always <= 1
+	// for example, 8K -> 1080p is 0.25, or 250 raw value
+	struct {
+		uint32_t argb8888;
+		uint32_t nv12;
+		uint32_t fp16;
+	} max_downscale_factor;
 };
 
 struct dc_caps {

drivers/gpu/drm/amd/display/dc/dce100/dce100_resource.c

@@ -380,7 +380,24 @@ static const struct resource_caps res_cap = {
 
 static const struct dc_plane_cap plane_cap = {
 	.type = DC_PLANE_TYPE_DCE_RGB,
-	.supports_argb8888 = true,
+
+	.pixel_format_support = {
+			.argb8888 = true,
+			.nv12 = false,
+			.fp16 = false
+	},
+
+	.max_upscale_factor = {
+			.argb8888 = 16000,
+			.nv12 = 1,
+			.fp16 = 1
+	},
+
+	.max_downscale_factor = {
+			.argb8888 = 250,
+			.nv12 = 1,
+			.fp16 = 1
+	}
 };
 
 #define CTX  ctx

drivers/gpu/drm/amd/display/dc/dce110/dce110_resource.c

@@ -397,14 +397,48 @@ static const struct dc_plane_cap plane_cap = {
 		.blends_with_below = true,
 		.blends_with_above = true,
 		.per_pixel_alpha = 1,
-		.supports_argb8888 = true,
+
+		.pixel_format_support = {
+				.argb8888 = true,
+				.nv12 = false,
+				.fp16 = false
+		},
+
+		.max_upscale_factor = {
+				.argb8888 = 16000,
+				.nv12 = 1,
+				.fp16 = 1
+		},
+
+		.max_downscale_factor = {
+				.argb8888 = 250,
+				.nv12 = 1,
+				.fp16 = 1
+		}
 };
 
 static const struct dc_plane_cap underlay_plane_cap = {
 		.type = DC_PLANE_TYPE_DCE_UNDERLAY,
 		.blends_with_above = true,
 		.per_pixel_alpha = 1,
-		.supports_nv12 = true
+
+		.pixel_format_support = {
+				.argb8888 = false,
+				.nv12 = true,
+				.fp16 = false
+		},
+
+		.max_upscale_factor = {
+				.argb8888 = 1,
+				.nv12 = 16000,
+				.fp16 = 1
+		},
+
+		.max_downscale_factor = {
+				.argb8888 = 1,
+				.nv12 = 250,
+				.fp16 = 1
+		}
 };
 
 #define CTX  ctx

drivers/gpu/drm/amd/display/dc/dce112/dce112_resource.c

@@ -399,7 +399,24 @@ static const struct resource_caps polaris_11_resource_cap = {
 
 static const struct dc_plane_cap plane_cap = {
 	.type = DC_PLANE_TYPE_DCE_RGB,
-	.supports_argb8888 = true,
+
+	.pixel_format_support = {
+			.argb8888 = true,
+			.nv12 = false,
+			.fp16 = false
+	},
+
+	.max_upscale_factor = {
+			.argb8888 = 16000,
+			.nv12 = 1,
+			.fp16 = 1
+	},
+
+	.max_downscale_factor = {
+			.argb8888 = 250,
+			.nv12 = 1,
+			.fp16 = 1
+	}
 };
 
 #define CTX  ctx

drivers/gpu/drm/amd/display/dc/dce120/dce120_resource.c

@@ -456,7 +456,24 @@ static const struct resource_caps res_cap = {
 
 static const struct dc_plane_cap plane_cap = {
 	.type = DC_PLANE_TYPE_DCE_RGB,
-	.supports_argb8888 = true,
+
+	.pixel_format_support = {
+			.argb8888 = true,
+			.nv12 = false,
+			.fp16 = false
+	},
+
+	.max_upscale_factor = {
+			.argb8888 = 16000,
+			.nv12 = 1,
+			.fp16 = 1
+	},
+
+	.max_downscale_factor = {
+			.argb8888 = 250,
+			.nv12 = 1,
+			.fp16 = 1
+	}
 };
 
 static const struct dc_debug_options debug_defaults = {

drivers/gpu/drm/amd/display/dc/dce80/dce80_resource.c

@@ -389,7 +389,24 @@ static const struct resource_caps res_cap_83 = {
 
 static const struct dc_plane_cap plane_cap = {
 	.type = DC_PLANE_TYPE_DCE_RGB,
-	.supports_argb8888 = true,
+
+	.pixel_format_support = {
+			.argb8888 = true,
+			.nv12 = false,
+			.fp16 = false
+	},
+
+	.max_upscale_factor = {
+			.argb8888 = 16000,
+			.nv12 = 1,
+			.fp16 = 1
+	},
+
+	.max_downscale_factor = {
+			.argb8888 = 250,
+			.nv12 = 1,
+			.fp16 = 1
+	}
 };
 
 static const struct dce_dmcu_registers dmcu_regs = {

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c

@@ -521,8 +521,24 @@ static const struct dc_plane_cap plane_cap = {
 	.blends_with_above = true,
 	.blends_with_below = true,
 	.per_pixel_alpha = true,
-	.supports_argb8888 = true,
-	.supports_nv12 = true
+
+	.pixel_format_support = {
+			.argb8888 = true,
+			.nv12 = true,
+			.fp16 = true
+	},
+
+	.max_upscale_factor = {
+			.argb8888 = 16000,
+			.nv12 = 16000,
+			.fp16 = 1
+	},
+
+	.max_downscale_factor = {
+			.argb8888 = 250,
+			.nv12 = 250,
+			.fp16 = 1
+	}
 };
 
 static const struct dc_debug_options debug_defaults_drv = {