xref: /OK3568_Linux_fs/yocto/meta-rockchip/recipes-graphics/wayland/weston_11.0.1/0053-HACK-pixman-renderer-Support-passing-dma-fd-to-pixma.patch (revision 4882a59341e53eb6f0b4789bf948001014eff981)

From cd7d2c8e3f294eb6743d5d5e293df3a64459fdb0 Mon Sep 17 00:00:00 2001
From: Jeffy Chen <jeffy.chen@rock-chips.com>
Date: Sat, 9 Oct 2021 12:33:33 +0800
Subject: [PATCH 53/93] HACK: pixman-renderer: Support passing dma fd to pixman

Usage:
pixman_image_set_destroy_function(image, NULL, (void *)(ptrdiff_t)dma_fd)

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
---
 libweston/backend-drm/drm-internal.h |  1 +
 libweston/backend-drm/drm.c          |  3 +++
 libweston/backend-drm/fb.c           | 15 +++++++++++++++
 libweston/pixman-renderer.c          |  2 ++
 libweston/pixman-renderer.h          |  4 ++++
 5 files changed, 25 insertions(+)

diff --git a/libweston/backend-drm/drm-internal.h b/libweston/backend-drm/drm-internal.h
index 12ee031..f7f042d 100644
--- a/libweston/backend-drm/drm-internal.h
+++ b/libweston/backend-drm/drm-internal.h
@@ -404,6 +404,7 @@ struct drm_fb {
 	uint64_t modifier;
 	int width, height;
 	int fd;
+	int dma_fd;

 	uint32_t plane_mask;

diff --git a/libweston/backend-drm/drm.c b/libweston/backend-drm/drm.c
index cb0935e..5c56c18 100644
--- a/libweston/backend-drm/drm.c
+++ b/libweston/backend-drm/drm.c
@@ -1691,6 +1691,9 @@ drm_output_init_pixman(struct drm_output *output, struct drm_backend *b)
 						 output->dumb[i]->strides[0]);
 		if (!output->image[i])
 			goto err;
+
+		pixman_image_set_dma_fd(output->image[i],
+					output->dumb[i]->dma_fd);
 	}

 	if (pixman_renderer_output_create(&output->base, &options) < 0)
diff --git a/libweston/backend-drm/fb.c b/libweston/backend-drm/fb.c
index 4cb2cbe..8c4c49c 100644
--- a/libweston/backend-drm/fb.c
+++ b/libweston/backend-drm/fb.c
@@ -58,6 +58,9 @@ drm_fb_destroy_dumb(struct drm_fb *fb)

 	assert(fb->type == BUFFER_PIXMAN_DUMB);

+	if (fb->dma_fd >= 0)
+		close(fb->dma_fd);
+
 	if (fb->map && fb->size > 0)
 		munmap(fb->map, fb->size);

@@ -121,6 +124,7 @@ drm_fb_create_dumb(struct drm_device *device, int width, int height,
 	struct drm_mode_create_dumb create_arg;
 	struct drm_mode_destroy_dumb destroy_arg;
 	struct drm_mode_map_dumb map_arg;
+	struct drm_prime_handle prime_arg;

 	fb = zalloc(sizeof *fb);
 	if (!fb)
@@ -175,8 +179,19 @@ drm_fb_create_dumb(struct drm_device *device, int width, int height,
 	if (fb->map == MAP_FAILED)
 		goto err_add_fb;

+	memset(&prime_arg, 0, sizeof(prime_arg));
+	prime_arg.fd = -1;
+	prime_arg.handle = fb->handles[0];
+	ret = drmIoctl(fb->fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &prime_arg);
+	if (ret)
+		goto err_unmap_fb;
+
+	fb->dma_fd = prime_arg.fd;
+
 	return fb;

+err_unmap_fb:
+	munmap(fb->map, fb->size);
 err_add_fb:
 	drmModeRmFB(device->drm.fd, fb->fb_id);
 err_bo:
diff --git a/libweston/pixman-renderer.c b/libweston/pixman-renderer.c
index d53fe42..22edaa5 100644
--- a/libweston/pixman-renderer.c
+++ b/libweston/pixman-renderer.c
@@ -881,6 +881,8 @@ pixman_renderer_attach_dmabuf(struct weston_surface *es,
 					     data->ptr + attributes->offset[0],
 					     attributes->stride[0]);

+	pixman_image_set_dma_fd(ps->image, attributes->fd[0]);
+
 	ps->buffer_destroy_listener.notify =
 		buffer_state_handle_buffer_destroy;
 	wl_signal_add(&buffer->destroy_signal,
diff --git a/libweston/pixman-renderer.h b/libweston/pixman-renderer.h
index 2b81dde..bcd248f 100644
--- a/libweston/pixman-renderer.h
+++ b/libweston/pixman-renderer.h
@@ -29,6 +29,10 @@
 #include "backend.h"
 #include "libweston-internal.h"

+/* HACK: Pass dma fd to pixman through destroy data */
+#define pixman_image_set_dma_fd(image, fd) \
+	pixman_image_set_destroy_function(image, NULL, (void *)(ptrdiff_t)fd)
+
 int
 pixman_renderer_init(struct weston_compositor *ec);

--
2.20.1