vmwgfx: Pick up the initial size from the width and height regs
Signed-off-by: Jakob Bornecrantz <jakob@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index 28f59a3c3..1227232 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -38,6 +38,10 @@
#define VMWGFX_CHIP_SVGAII 0
#define VMW_FB_RESERVATION 0
+#define VMW_MIN_INITIAL_WIDTH 800
+#define VMW_MIN_INITIAL_HEIGHT 600
+
+
/**
* Fully encoded drm commands. Might move to vmw_drm.h
*/
@@ -387,6 +391,31 @@
BUG_ON(n3d < 0);
}
+/**
+ * Sets the initial_[width|height] fields on the given vmw_private.
+ *
+ * It does so by reading SVGA_REG_[WIDTH|HEIGHT] regs and then
+ * capping the value to fb_max_[width|height] fields and the
+ * VMW_MIN_INITIAL_[WIDTH|HEIGHT].
+ */
+static void vmw_get_initial_size(struct vmw_private *dev_priv)
+{
+ uint32_t width;
+ uint32_t height;
+
+ width = vmw_read(dev_priv, SVGA_REG_WIDTH);
+ height = vmw_read(dev_priv, SVGA_REG_HEIGHT);
+
+ width = max_t(uint32_t, width, VMW_MIN_INITIAL_WIDTH);
+ width = min_t(uint32_t, width, dev_priv->fb_max_width);
+
+ height = max_t(uint32_t, height, VMW_MIN_INITIAL_HEIGHT);
+ height = min_t(uint32_t, height, dev_priv->fb_max_height);
+
+ dev_priv->initial_width = width;
+ dev_priv->initial_height = height;
+}
+
static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
{
struct vmw_private *dev_priv;
@@ -441,6 +470,9 @@
dev_priv->mmio_size = vmw_read(dev_priv, SVGA_REG_MEM_SIZE);
dev_priv->fb_max_width = vmw_read(dev_priv, SVGA_REG_MAX_WIDTH);
dev_priv->fb_max_height = vmw_read(dev_priv, SVGA_REG_MAX_HEIGHT);
+
+ vmw_get_initial_size(dev_priv);
+
if (dev_priv->capabilities & SVGA_CAP_GMR) {
dev_priv->max_gmr_descriptors =
vmw_read(dev_priv,