[PATCH v2 2/3] drm/i915/fbc: No need of any hardcoded plane width limit from LNL+

In xe2_lpd+ platforms, there are no restrictions to enable FBC
on planes with respect to the plane width - width can be as per
the platform's maximum supported resolution.

v2: patches squashed and changes in patch descriptions

Bspec: 69560
Signed-off-by: Vinod Govindapillai <[email protected]>
---
 drivers/gpu/drm/i915/display/intel_fbc.c | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c b/drivers/gpu/drm/i915/display/intel_fbc.c
index a7d02dd6ca96..20f02ef9387a 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -59,6 +59,7 @@
 #include "intel_fbc_regs.h"
 #include "intel_frontbuffer.h"
 #include "intel_parent.h"
+#include "skl_universal_plane.h"
 
 #define for_each_fbc_id(__display, __fbc_id) \
 	for ((__fbc_id) = INTEL_FBC_A; (__fbc_id) < I915_MAX_FBCS; (__fbc_id)++) \
@@ -1315,10 +1316,18 @@ static bool intel_fbc_surface_size_ok(const struct intel_plane_state *plane_stat
 	return effective_w <= max_w && effective_h <= max_h;
 }
 
-static void intel_fbc_max_plane_size(struct intel_display *display,
+static void intel_fbc_max_plane_size(const struct intel_plane_state *plane_state,
 				     unsigned int *w, unsigned int *h)
 {
-	if (DISPLAY_VER(display) >= 10) {
+	struct intel_display *display = to_intel_display(plane_state);
+	struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
+	const struct drm_framebuffer *fb = plane_state->hw.fb;
+	unsigned int rotation = plane_state->hw.rotation;
+
+	if (DISPLAY_VER(display) >= 20) {
+		*w = intel_plane_max_width(plane, fb, 0, rotation);
+		*h = 4096;
+	} else if (DISPLAY_VER(display) >= 10) {
 		*w = 5120;
 		*h = 4096;
 	} else if (DISPLAY_VER(display) >= 8 || display->platform.haswell) {
@@ -1335,10 +1344,9 @@ static void intel_fbc_max_plane_size(struct intel_display *display,
 
 static bool intel_fbc_plane_size_valid(const struct intel_plane_state *plane_state)
 {
-	struct intel_display *display = to_intel_display(plane_state);
 	unsigned int w, h, max_w, max_h;
 
-	intel_fbc_max_plane_size(display, &max_w, &max_h);
+	intel_fbc_max_plane_size(plane_state, &max_w, &max_h);
 
 	w = drm_rect_width(&plane_state->uapi.src) >> 16;
 	h = drm_rect_height(&plane_state->uapi.src) >> 16;
-- 
2.43.0