vmwgfx: Emulate depth 32 framebuffers

Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 9 insertions, 1 deletions

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index 39b99dbde218..00ec61921f2f 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -679,6 +679,7 @@ static int do_dmabuf_define_gmrfb(struct drm_file *file_priv,
                                   struct vmw_private *dev_priv,
                                   struct vmw_framebuffer *framebuffer)
 {
+        int depth = framebuffer->base.depth;
         size_t fifo_size;
         int ret;
 
@@ -687,6 +688,13 @@ static int do_dmabuf_define_gmrfb(struct drm_file *file_priv,
                 SVGAFifoCmdDefineGMRFB body;
         } *cmd;
 
+        /* Emulate RGBA support, contrary to svga_reg.h this is not
+         * supported by hosts. This is only a problem if we are reading
+         * this value later and expecting what we uploaded back.
+         */
+        if (depth == 32)
+                depth = 24;
+
         fifo_size = sizeof(*cmd);
         cmd = kmalloc(fifo_size, GFP_KERNEL);
         if (unlikely(cmd == NULL)) {
@@ -697,7 +705,7 @@ static int do_dmabuf_define_gmrfb(struct drm_file *file_priv,
         memset(cmd, 0, fifo_size);
         cmd->header = SVGA_CMD_DEFINE_GMRFB;
         cmd->body.format.bitsPerPixel = framebuffer->base.bits_per_pixel;
-        cmd->body.format.colorDepth = framebuffer->base.depth;
+        cmd->body.format.colorDepth = depth;
         cmd->body.format.reserved = 0;
         cmd->body.bytesPerLine = framebuffer->base.pitch;
         cmd->body.ptr.gmrId = framebuffer->user_handle;