[PATCH 3.17 284/319] drm/vmwgfx: Filter out modes those cannot be supported by the current VRAM size.

From: Greg Kroah-Hartman
Date: Tue Nov 11 2014 - 20:35:38 EST


3.17-stable review patch. If anyone has any objections, please let me know.

------------------

From: Sinclair Yeh <syeh@xxxxxxxxxx>

commit 9a72384d86b26cb8a2b25106677e1197f606668f upstream.

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@xxxxxxxxxx>
Reviewed-by: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 6 +++++-
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 16 +++++++++++++---
2 files changed, 18 insertions(+), 4 deletions(-)

--- 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_de
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);
--- 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 d
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 d
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 d
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;



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