And assign the initial width and height to the minimum in that case.
Strange values (-1) from these registers have been reported by users.
Signed-off-by: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
Reviewed-by: Jakob Bornecrantz <jakob@xxxxxxxxxx>
---
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 18 ++++++++++++++----
1 files changed, 14 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index 1227232..f076f66 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -395,7 +395,9 @@ void vmw_3d_resource_dec(struct vmw_private *dev_priv,
* 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
+ * clamping the value to fb_max_[width|height] fields and the
+ * VMW_MIN_INITIAL_[WIDTH|HEIGHT].
+ * If the values appear to be invalid, set them to
* VMW_MIN_INITIAL_[WIDTH|HEIGHT].
*/
static void vmw_get_initial_size(struct vmw_private *dev_priv)
@@ -407,10 +409,18 @@ static void vmw_get_initial_size(struct vmw_private *dev_priv)
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);
+
+ if (width > dev_priv->fb_max_width ||
+ height > dev_priv->fb_max_height) {
+
+ /*
+ * This is a host error and shouldn't occur.
+ */
+
+ width = VMW_MIN_INITIAL_WIDTH;
+ height = VMW_MIN_INITIAL_HEIGHT;
+ }
dev_priv->initial_width = width;
dev_priv->initial_height = height;
--
1.7.4.4
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