igt_kms: Add support for setting plane rotation

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>

lib/igt_kms.c

@@ -641,6 +641,16 @@ get_plane_property(igt_display_t *display, uint32_t plane_id, const char *name,
 			    name, prop_id, value);
 }
 
+static void
+igt_plane_set_property(igt_plane_t *plane, uint32_t prop_id, uint64_t value)
+{
+	igt_pipe_t *pipe = plane->pipe;
+	igt_display_t *display = pipe->display;
+
+	drmModeObjectSetProperty(display->drm_fd, plane->drm_plane->plane_id,
+				 DRM_MODE_OBJECT_PLANE, prop_id, value);
+}
+
 /*
  * Walk a plane's property list to determine its type.  If we don't
  * find a type property, then the kernel doesn't support universal
@@ -986,6 +996,10 @@ static int igt_drm_plane_commit(igt_plane_t *plane,
 
 	igt_assert(plane->drm_plane);
 
+	/* it's an error to try an unsupported feature */
+	igt_assert(igt_plane_supports_rotation(plane) ||
+		   !plane->rotation_changed);
+
 	fb_id = igt_plane_get_fb_id(plane);
 	crtc_id = output->config.crtc->crtc_id;
 
@@ -1035,6 +1049,14 @@ static int igt_drm_plane_commit(igt_plane_t *plane,
 
 	plane->fb_changed = false;
 	plane->position_changed = false;
+
+	if (plane->rotation_changed) {
+		igt_plane_set_property(plane, plane->rotation_property,
+				       plane->rotation);
+
+		plane->rotation_changed = false;
+	}
+
 	return 0;
 }
 
@@ -1117,6 +1139,9 @@ static int igt_primary_plane_commit_legacy(igt_plane_t *primary,
 	/* Primary planes can't be windowed when using a legacy commit */
 	igt_assert((primary->crtc_x == 0 && primary->crtc_y == 0));
 
+	/* nor rotated */
+	igt_assert(!primary->rotation_changed);
+
 	if (!primary->fb_changed && !primary->position_changed &&
 	    !primary->panning_changed)
 		return 0;
@@ -1408,6 +1433,35 @@ void igt_plane_set_panning(igt_plane_t *plane, int x, int y)
 	plane->panning_changed = true;
 }
 
+static const char *rotation_name(igt_rotation_t rotation)
+{
+	switch (rotation) {
+	case IGT_ROTATION_0:
+		return "0°";
+	case IGT_ROTATION_90:
+		return "90°";
+	case IGT_ROTATION_180:
+		return "180°";
+	case IGT_ROTATION_270:
+		return "270°";
+	default:
+		igt_assert(0);
+	}
+}
+
+void igt_plane_set_rotation(igt_plane_t *plane, igt_rotation_t rotation)
+{
+	igt_pipe_t *pipe = plane->pipe;
+	igt_display_t *display = pipe->display;
+
+	LOG(display, "%c.%d: plane_set_rotation(%s)\n", pipe_name(pipe->pipe),
+	    plane->index, rotation_name(rotation));
+
+	plane->rotation = rotation;
+
+	plane->rotation_changed = true;
+}
+
 void igt_wait_for_vblank(int drm_fd, enum pipe pipe)
 {
 	drmVBlank wait_vbl;

lib/igt_kms.h

@@ -71,6 +71,14 @@ enum igt_commit_style {
 	/* We'll add atomic here eventually. */
 };
 
+typedef enum {
+	/* this maps to the kernel API */
+	IGT_ROTATION_0   = 1 << 0,
+	IGT_ROTATION_90  = 1 << 1,
+	IGT_ROTATION_180 = 1 << 2,
+	IGT_ROTATION_270 = 1 << 3,
+} igt_rotation_t;
+
 #include "igt_fb.h"
 
 struct kmstest_connector_config {
@@ -155,6 +163,7 @@ typedef struct {
 	unsigned int fb_changed       : 1;
 	unsigned int position_changed : 1;
 	unsigned int panning_changed  : 1;
+	unsigned int rotation_changed : 1;
 	/*
 	 * drm_plane can be NULL for primary and cursor planes (when not
 	 * using the atomic modeset API)
@@ -168,6 +177,7 @@ typedef struct {
 	int crtc_x, crtc_y;
 	/* panning offset within the fb */
 	unsigned int pan_x, pan_y;
+	igt_rotation_t rotation;
 } igt_plane_t;
 
 struct igt_pipe {
@@ -223,6 +233,7 @@ static inline bool igt_plane_supports_rotation(igt_plane_t *plane)
 void igt_plane_set_fb(igt_plane_t *plane, struct igt_fb *fb);
 void igt_plane_set_position(igt_plane_t *plane, int x, int y);
 void igt_plane_set_panning(igt_plane_t *plane, int x, int y);
+void igt_plane_set_rotation(igt_plane_t *plane, igt_rotation_t rotation);
 
 void igt_wait_for_vblank(int drm_fd, enum pipe pipe);