xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

vmwgfx: Enable use of the vblank system

Browse Source 
This is to avoid accessing uninitialized data during
drm_irq_uninstall and vblank ioctls. At the same time, enable error check from
drm_kms_init which previously appeared to ignore all errors.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Thomas Hellstrom
2010-10-01 10:21:49 +02:00
committed by Dave Airlie
parent 30c78bb838
commit 7a1c2f6c8d
4 changed files with 49 additions and 31 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/gpu/drm/vmwgfx/vmwgfx_ldu.c
View File

@@ -27,6 +27,8 @@
#include "vmwgfx_kms.h"
#define VMWGFX_LDU_NUM_DU 8
#define vmw_crtc_to_ldu(x) \
container_of(x, struct vmw_legacy_display_unit, base.crtc)
#define vmw_encoder_to_ldu(x) \
@@ -536,6 +538,10 @@ static int vmw_ldu_init(struct vmw_private *dev_priv, unsigned unit)
int vmw_kms_init_legacy_display_system(struct vmw_private *dev_priv)
{
struct drm_device *dev = dev_priv->dev;
int i;
int ret;
if (dev_priv->ldu_priv) {
DRM_INFO("ldu system already on\n");
return -EINVAL;
@@ -553,23 +559,24 @@ int vmw_kms_init_legacy_display_system(struct vmw_private *dev_priv)
drm_mode_create_dirty_info_property(dev_priv->dev);
vmw_ldu_init(dev_priv, 0);
/* for old hardware without multimon only enable one display */
if (dev_priv->capabilities & SVGA_CAP_MULTIMON) {
vmw_ldu_init(dev_priv, 1);
vmw_ldu_init(dev_priv, 2);
vmw_ldu_init(dev_priv, 3);
vmw_ldu_init(dev_priv, 4);
vmw_ldu_init(dev_priv, 5);
vmw_ldu_init(dev_priv, 6);
vmw_ldu_init(dev_priv, 7);
for (i = 0; i < VMWGFX_LDU_NUM_DU; ++i)
vmw_ldu_init(dev_priv, i);
ret = drm_vblank_init(dev, VMWGFX_LDU_NUM_DU);
} else {
/* for old hardware without multimon only enable one display */
vmw_ldu_init(dev_priv, 0);
ret = drm_vblank_init(dev, 1);
}
return 0;
return ret;
}
int vmw_kms_close_legacy_display_system(struct vmw_private *dev_priv)
{
struct drm_device *dev = dev_priv->dev;
drm_vblank_cleanup(dev);
if (!dev_priv->ldu_priv)
return -ENOSYS;