drm/vmwgfx: Filter out modes those cannot be supported by the current VRAM size.

When screen objects are enabled, the bpp is assumed to be 32, otherwise
it is set to 16.

v2:
* Use u32 instead of u64 for assumed_bpp.
* Fixed mechanism to check for screen objects
* Limit the back buffer size to VRAM.

Signed-off-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Cc: <stable@vger.kernel.org>

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
index 7197af15731383c817728e155c09621c4c954fb0..25f3c250fd98635ff50a7249f40e691686519674 100644 (file)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
@@ -688,7 +688,11 @@ static int vmw_driver_load(struct drm_device *dev, unsigned long chipset)
                goto out_err0;
        }
 
-       if (unlikely(dev_priv->prim_bb_mem < dev_priv->vram_size))
+       /*
+        * Limit back buffer size to VRAM size.  Remove this once
+        * screen targets are implemented.
+        */
+       if (dev_priv->prim_bb_mem > dev_priv->vram_size)
                dev_priv->prim_bb_mem = dev_priv->vram_size;
 
        mutex_unlock(&dev_priv->hw_mutex);

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index 8fc1e38bbe44c639455c93eba2810a206a40689b..941a7bc0b79190b7bcafe751cd7cac26b371911e 100644 (file)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -1950,6 +1950,14 @@ int vmw_du_connector_fill_modes(struct drm_connector *connector,
                DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC)
        };
        int i;
+       u32 assumed_bpp = 2;
+
+       /*
+        * If using screen objects, then assume 32-bpp because that's what the
+        * SVGA device is assuming
+        */
+       if (dev_priv->sou_priv)
+               assumed_bpp = 4;
 
        /* Add preferred mode */
        {
@@ -1960,8 +1968,9 @@ int vmw_du_connector_fill_modes(struct drm_connector *connector,
                mode->vdisplay = du->pref_height;
                vmw_guess_mode_timing(mode);
 
-               if (vmw_kms_validate_mode_vram(dev_priv, mode->hdisplay * 2,
-                                              mode->vdisplay)) {
+               if (vmw_kms_validate_mode_vram(dev_priv,
+                                               mode->hdisplay * assumed_bpp,
+                                               mode->vdisplay)) {
                        drm_mode_probed_add(connector, mode);
                } else {
                        drm_mode_destroy(dev, mode);
@@ -1983,7 +1992,8 @@ int vmw_du_connector_fill_modes(struct drm_connector *connector,
                    bmode->vdisplay > max_height)
                        continue;
 
-               if (!vmw_kms_validate_mode_vram(dev_priv, bmode->hdisplay * 2,
+               if (!vmw_kms_validate_mode_vram(dev_priv,
+                                               bmode->hdisplay * assumed_bpp,
                                                bmode->vdisplay))
                        continue;