drm/amd/display: Add plane capabilities to dc_caps

[Why]
The current dc_caps doesn't provide the information needed to
determine the count and type of each plane to be exposed to userspace.

There are three types of DRM planes that are exposed to userspace:

1. Primary planes (can be used for modesetting)
2. Overlay planes (can be blended below or above a primary plane)
3. Cursor planes (blended topmost)

We need to know the number and type of each in amdgpu_dm to expose
to userspace.

Hardware supports blending planes below, above or both ways depending
on the ASIC. Alpha support is also ASIC dependent. Some hardware has
dedicated pipes for overlays and other hardware combines the pipes.

All of this should be exposed in a way that DM can query and use.

[How]
Introduce the dc_plane_cap structure that describes the capabilities
for the hw planes.

It describes:
- the type of the plane
- whether the plane can blend with planes below it
- whether the plane can blend with planes above it
- whether the plane supports per pixel alpha blending
- supported formats on the plane (partial list for now)

Pre DCN ASICs don't have their full capabilities described for now.
They can be updated as needed in the future.
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -42,6 +42,7 @@
 #define DC_VER "3.2.19"
 
 #define MAX_SURFACES 3
+#define MAX_PLANES 6
 #define MAX_STREAMS 6
 #define MAX_SINKS_PER_LINK 4
 
@@ -53,6 +54,22 @@ struct dc_versions {
 	struct dmcu_version dmcu_version;
 };
 
+enum dc_plane_type {
+	DC_PLANE_TYPE_INVALID,
+	DC_PLANE_TYPE_DCE_RGB,
+	DC_PLANE_TYPE_DCE_UNDERLAY,
+	DC_PLANE_TYPE_DCN_UNIVERSAL,
+};
+
+struct dc_plane_cap {
+	enum dc_plane_type type;
+	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 dc_caps {
 	uint32_t max_streams;
 	uint32_t max_links;
@@ -73,6 +90,7 @@ struct dc_caps {
 	bool force_dp_tps4_for_cp2520;
 	bool disable_dp_clk_share;
 	bool psp_setup_panel_mode;
+	struct dc_plane_cap planes[MAX_PLANES];
 };
 
 struct dc_dcc_surface_param {

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

@@ -378,6 +378,11 @@ static const struct resource_caps res_cap = {
 	.num_ddc = 6,
 };
 
+static const struct dc_plane_cap plane_cap = {
+	.type = DC_PLANE_TYPE_DCE_RGB,
+	.supports_argb8888 = true,
+};
+
 #define CTX  ctx
 #define REG(reg) mm ## reg
 
@@ -1023,6 +1028,9 @@ static bool construct(
 
 	dc->caps.max_planes =  pool->base.pipe_count;
 
+	for (i = 0; i < dc->caps.max_planes; ++i)
+		dc->caps.planes[i] = plane_cap;
+
 	if (!resource_construct(num_virtual_links, dc, &pool->base,
 			&res_create_funcs))
 		goto res_create_fail;

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

@@ -392,6 +392,21 @@ static const struct resource_caps stoney_resource_cap = {
 		.num_ddc = 3,
 };
 
+static const struct dc_plane_cap plane_cap = {
+		.type = DC_PLANE_TYPE_DCE_RGB,
+		.blends_with_below = true,
+		.blends_with_above = true,
+		.per_pixel_alpha = 1,
+		.supports_argb8888 = true,
+};
+
+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
+};
+
 #define CTX  ctx
 #define REG(reg) mm ## reg
 
@@ -1371,6 +1386,11 @@ static bool construct(
 
 	dc->caps.max_planes =  pool->base.pipe_count;
 
+	for (i = 0; i < pool->base.underlay_pipe_index; ++i)
+		dc->caps.planes[i] = plane_cap;
+
+	dc->caps.planes[pool->base.underlay_pipe_index] = underlay_plane_cap;
+
 	bw_calcs_init(dc->bw_dceip, dc->bw_vbios, dc->ctx->asic_id);
 
 	bw_calcs_data_update_from_pplib(dc);

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

@@ -397,6 +397,11 @@ static const struct resource_caps polaris_11_resource_cap = {
 		.num_ddc = 5,
 };
 
+static const struct dc_plane_cap plane_cap = {
+	.type = DC_PLANE_TYPE_DCE_RGB,
+	.supports_argb8888 = true,
+};
+
 #define CTX  ctx
 #define REG(reg) mm ## reg
 
@@ -1310,6 +1315,9 @@ static bool construct(
 
 	dc->caps.max_planes =  pool->base.pipe_count;
 
+	for (i = 0; i < dc->caps.max_planes; ++i)
+		dc->caps.planes[i] = plane_cap;
+
 	/* Create hardware sequencer */
 	dce112_hw_sequencer_construct(dc);
 

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

@@ -454,6 +454,11 @@ static const struct resource_caps res_cap = {
 		.num_ddc = 6,
 };
 
+static const struct dc_plane_cap plane_cap = {
+	.type = DC_PLANE_TYPE_DCE_RGB,
+	.supports_argb8888 = true,
+};
+
 static const struct dc_debug_options debug_defaults = {
 		.disable_clock_gate = true,
 };
@@ -1171,6 +1176,9 @@ static bool construct(
 
 	dc->caps.max_planes =  pool->base.pipe_count;
 
+	for (i = 0; i < dc->caps.max_planes; ++i)
+		dc->caps.planes[i] = plane_cap;
+
 	bw_calcs_init(dc->bw_dceip, dc->bw_vbios, dc->ctx->asic_id);
 
 	bw_calcs_data_update_from_pplib(dc);

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

@@ -387,6 +387,11 @@ static const struct resource_caps res_cap_83 = {
 		.num_ddc = 2,
 };
 
+static const struct dc_plane_cap plane_cap = {
+	.type = DC_PLANE_TYPE_DCE_RGB,
+	.supports_argb8888 = true,
+};
+
 static const struct dce_dmcu_registers dmcu_regs = {
 		DMCU_DCE80_REG_LIST()
 };
@@ -1019,6 +1024,10 @@ static bool dce80_construct(
 	}
 
 	dc->caps.max_planes =  pool->base.pipe_count;
+
+	for (i = 0; i < dc->caps.max_planes; ++i)
+		dc->caps.planes[i] = plane_cap;
+
 	dc->caps.disable_dp_clk_share = true;
 
 	if (!resource_construct(num_virtual_links, dc, &pool->base,
@@ -1224,6 +1233,10 @@ static bool dce81_construct(
 	}
 
 	dc->caps.max_planes =  pool->base.pipe_count;
+
+	for (i = 0; i < dc->caps.max_planes; ++i)
+		dc->caps.planes[i] = plane_cap;
+
 	dc->caps.disable_dp_clk_share = true;
 
 	if (!resource_construct(num_virtual_links, dc, &pool->base,
@@ -1425,6 +1438,10 @@ static bool dce83_construct(
 	}
 
 	dc->caps.max_planes =  pool->base.pipe_count;
+
+	for (i = 0; i < dc->caps.max_planes; ++i)
+		dc->caps.planes[i] = plane_cap;
+
 	dc->caps.disable_dp_clk_share = true;
 
 	if (!resource_construct(num_virtual_links, dc, &pool->base,

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

@@ -516,6 +516,15 @@ static const struct resource_caps rv2_res_cap = {
 };
 #endif
 
+static const struct dc_plane_cap plane_cap = {
+	.type = DC_PLANE_TYPE_DCN_UNIVERSAL,
+	.blends_with_above = true,
+	.blends_with_below = true,
+	.per_pixel_alpha = true,
+	.supports_argb8888 = true,
+	.supports_nv12 = true
+};
+
 static const struct dc_debug_options debug_defaults_drv = {
 		.sanity_checks = true,
 		.disable_dmcu = true,
@@ -1510,6 +1519,9 @@ static bool construct(
 	dcn10_hw_sequencer_construct(dc);
 	dc->caps.max_planes =  pool->base.pipe_count;
 
+	for (i = 0; i < dc->caps.max_planes; ++i)
+		dc->caps.planes[i] = plane_cap;
+
 	dc->cap_funcs = cap_funcs;
 
 	return true;