diff --git a/drivers/gpu/drm/vkms/vkms_composer.c b/drivers/gpu/drm/vkms/vkms_composer.c
index 914d85ac1654..824bb65badb7 100644
--- a/drivers/gpu/drm/vkms/vkms_composer.c
+++ b/drivers/gpu/drm/vkms/vkms_composer.c
@@ -17,6 +17,9 @@ static struct pixel_argb_u16 *get_out_buffer(const struct vkms_frame_info *frame
 	struct pixel_argb_u16 *out = output_buffer->pixels;
 
 	switch (frame_info->rotation & DRM_MODE_ROTATE_MASK) {
+	case DRM_MODE_ROTATE_90:
+		out -= frame_info->dst.y1;
+		break;
 	case DRM_MODE_ROTATE_180:
 		out -= frame_info->dst.x1;
 		break;
@@ -58,10 +61,12 @@ static void pre_mul_alpha_blend(struct vkms_frame_info *frame_info,
 {
 	struct pixel_argb_u16 *out = get_out_buffer(frame_info, output_buffer);
 	struct pixel_argb_u16 *in = stage_buffer->pixels;
-	int x_limit = min_t(size_t, drm_rect_width(&frame_info->dst),
-			    stage_buffer->n_pixels);
+	int limit = min_t(size_t, drm_rect_width(&frame_info->dst), stage_buffer->n_pixels);
+
+	if (frame_info->rotation & DRM_MODE_ROTATE_90)
+		limit = min_t(size_t, drm_rect_height(&frame_info->dst), stage_buffer->n_pixels);
 
-	for (int x = 0; x < x_limit; x++) {
+	for (int x = 0; x < limit; x++) {
 		out[x].a = (u16)0xffff;
 		out[x].r = pre_mul_blend_channel(in[x].r, out[x].r, in[x].a);
 		out[x].g = pre_mul_blend_channel(in[x].g, out[x].g, in[x].a);
@@ -72,6 +77,10 @@ static void pre_mul_alpha_blend(struct vkms_frame_info *frame_info,
 static int get_y_pos(struct vkms_frame_info *frame_info, int y)
 {
 	switch (frame_info->rotation & DRM_MODE_ROTATE_MASK) {
+	case DRM_MODE_ROTATE_90:
+		if (y - frame_info->dst.x1 < 0)
+			return -1;
+		return frame_info->dst.x2 - y - 1;
 	case DRM_MODE_ROTATE_180:
 		return drm_rect_height(&frame_info->dst) - y - 1;
 	default:
@@ -79,11 +88,15 @@ static int get_y_pos(struct vkms_frame_info *frame_info, int y)
 	}
 }
 
-static bool check_y_limit(struct vkms_frame_info *frame_info, int y)
+static bool check_limit(struct vkms_frame_info *frame_info, int pos)
 {
-	if (y >= frame_info->dst.y1 && y < frame_info->dst.y2)
-		return true;
-
+	if (frame_info->rotation & DRM_MODE_ROTATE_90) {
+		if (pos >= 0 && pos < drm_rect_width(&frame_info->dst))
+			return true;
+	} else {
+		if (pos >= frame_info->dst.y1 && pos < frame_info->dst.y2)
+			return true;
+	}
 	return false;
 }
 
@@ -125,7 +138,7 @@ static void blend(struct vkms_writeback_job *wb,
 		for (size_t i = 0; i < n_active_planes; i++) {
 			y_pos = get_y_pos(plane[i]->frame_info, y);
 
-			if (!check_y_limit(plane[i]->frame_info, y_pos))
+			if (!check_limit(plane[i]->frame_info, y_pos))
 				continue;
 
 			vkms_compose_row(stage_buffer, plane[i], y_pos);
diff --git a/drivers/gpu/drm/vkms/vkms_formats.c b/drivers/gpu/drm/vkms/vkms_formats.c
index 7a98d4d75f17..90b72b0ff8c9 100644
--- a/drivers/gpu/drm/vkms/vkms_formats.c
+++ b/drivers/gpu/drm/vkms/vkms_formats.c
@@ -49,6 +49,20 @@ static int get_x_position(const struct vkms_frame_info *frame_info, int x_limit,
 	return x;
 }
 
+static int get_limit(const struct vkms_frame_info *frame_info, struct line_buffer *stage_buffer)
+{
+	if (frame_info->rotation & DRM_MODE_ROTATE_90)
+		return min_t(size_t, drm_rect_height(&frame_info->dst), stage_buffer->n_pixels);
+	return min_t(size_t, drm_rect_width(&frame_info->dst), stage_buffer->n_pixels);
+}
+
+static void *get_src_pixels(const struct vkms_frame_info *frame_info, int x, int y, int pixel_size)
+{
+	if (frame_info->rotation & DRM_MODE_ROTATE_90)
+		return get_packed_src_addr(frame_info, x + frame_info->dst.y1) + pixel_size * y;
+	return get_packed_src_addr(frame_info, y) + pixel_size * x;
+}
+
 static void ARGB8888_to_argb_u16(u16 *src_pixels, struct pixel_argb_u16 *out_pixels, int x)
 {
 	u8 *pixels = (u8 *)src_pixels;
@@ -110,21 +124,21 @@ static void RGB565_to_argb_u16(u16 *src_pixels, struct pixel_argb_u16 *out_pixel
 void vkms_compose_row(struct line_buffer *stage_buffer, struct vkms_plane_state *plane, int y)
 {
 	struct pixel_argb_u16 *out_pixels = stage_buffer->pixels;
-	u16 *src_pixels = get_packed_src_addr(plane->frame_info, y);
-	int limit = min_t(size_t, drm_rect_width(&plane->frame_info->dst),
-			  stage_buffer->n_pixels);
+	int limit = get_limit(plane->frame_info, stage_buffer);
 	int format = plane->frame_info->fb->format->format;
 	int pixel_size, x_pos;
+	u16 *src_pixels;
 
 	if (format == DRM_FORMAT_RGB565)
-		pixel_size = 1;
-	else if (format == DRM_FORMAT_ARGB8888 || format == DRM_FORMAT_XRGB8888)
 		pixel_size = 2;
-	else
+	else if (format == DRM_FORMAT_ARGB8888 || format == DRM_FORMAT_XRGB8888)
 		pixel_size = 4;
+	else
+		pixel_size = 8;
 
-	for (size_t x = 0; x < limit; x++, src_pixels += pixel_size) {
+	for (size_t x = 0; x < limit; x++) {
 		x_pos = get_x_position(plane->frame_info, limit, x);
+		src_pixels = get_src_pixels(plane->frame_info, x, y, pixel_size);
 
 		plane->pixel_read(src_pixels, out_pixels, x_pos);
 	}
diff --git a/drivers/gpu/drm/vkms/vkms_plane.c b/drivers/gpu/drm/vkms/vkms_plane.c
index f6a884b5872c..ce2ebe56f6e4 100644
--- a/drivers/gpu/drm/vkms/vkms_plane.c
+++ b/drivers/gpu/drm/vkms/vkms_plane.c
@@ -123,6 +123,7 @@ static void vkms_plane_atomic_update(struct drm_plane *plane,
 	drm_framebuffer_get(frame_info->fb);
 	frame_info->rotation = drm_rotation_simplify(new_state->rotation,
 						     DRM_MODE_ROTATE_0 |
+						     DRM_MODE_ROTATE_90 |
 						     DRM_MODE_ROTATE_180);
 
 	drm_rect_rotate(&frame_info->dst, drm_rect_width(&frame_info->dst),
@@ -239,6 +240,7 @@ struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev,
 
 	drm_plane_create_rotation_property(&plane->base, DRM_MODE_ROTATE_0,
 					   DRM_MODE_ROTATE_0 |
+					   DRM_MODE_ROTATE_90 |
 					   DRM_MODE_ROTATE_180);
 
 	return plane;
