drm/amd/display: interface to obtain minimum plane size caps

[Why]
Implement an interface to obtain plane size caps

[How]
Add min_width, min_height fields to dc_plane_cap structure.
Set values to 16x16 for discrete ASICs, and 64x64 for others.

Signed-off-by: Igor Kravchenko <Igor.Kravchenko@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -96,6 +96,9 @@ struct dc_plane_cap {
 		uint32_t nv12;
 		uint32_t fp16;
 	} max_downscale_factor;
+	// minimal width/height
+	uint32_t min_width;
+	uint32_t min_height;
 };
 
 // Color management caps (DPP and MPC)

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

@@ -423,7 +423,9 @@ static const struct dc_plane_cap plane_cap = {
 				.argb8888 = 250,
 				.nv12 = 1,
 				.fp16 = 1
-		}
+		},
+		64,
+		64
 };
 
 static const struct dc_plane_cap underlay_plane_cap = {
@@ -447,7 +449,9 @@ static const struct dc_plane_cap underlay_plane_cap = {
 				.argb8888 = 1,
 				.nv12 = 250,
 				.fp16 = 1
-		}
+		},
+		64,
+		64
 };
 
 #define CTX  ctx

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

@@ -424,7 +424,9 @@ static const struct dc_plane_cap plane_cap = {
 			.argb8888 = 250,
 			.nv12 = 1,
 			.fp16 = 1
-	}
+	},
+	64,
+	64
 };
 
 #define CTX  ctx

drivers/gpu/drm/amd/display/dc/dcn20/dcn20_resource.c

@@ -1043,7 +1043,9 @@ static const struct dc_plane_cap plane_cap = {
 			.argb8888 = 250,
 			.nv12 = 250,
 			.fp16 = 1
-	}
+	},
+	16,
+	16
 };
 static const struct resource_caps res_cap_nv14 = {
 		.num_timing_generator = 5,

drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c

@@ -857,7 +857,9 @@ static const struct dc_plane_cap plane_cap = {
 			.argb8888 = 250,
 			.nv12 = 250,
 			.fp16 = 250
-	}
+	},
+	64,
+	64
 };
 
 static const struct dc_debug_options debug_defaults_drv = {