mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 10:49:33 +00:00
drm/nouveau: determine timing crystal freq from straps
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
parent
93e692dc5f
commit
f2cbe46f14
2 changed files with 19 additions and 1 deletions
|
@ -680,6 +680,7 @@ struct drm_nouveau_private {
|
||||||
/* exact chipset, derived from NV_PMC_BOOT_0 */
|
/* exact chipset, derived from NV_PMC_BOOT_0 */
|
||||||
int chipset;
|
int chipset;
|
||||||
int flags;
|
int flags;
|
||||||
|
u32 crystal;
|
||||||
|
|
||||||
void __iomem *mmio;
|
void __iomem *mmio;
|
||||||
|
|
||||||
|
|
|
@ -984,7 +984,7 @@ static int nouveau_remove_conflicting_drivers(struct drm_device *dev)
|
||||||
int nouveau_load(struct drm_device *dev, unsigned long flags)
|
int nouveau_load(struct drm_device *dev, unsigned long flags)
|
||||||
{
|
{
|
||||||
struct drm_nouveau_private *dev_priv;
|
struct drm_nouveau_private *dev_priv;
|
||||||
uint32_t reg0;
|
uint32_t reg0, strap;
|
||||||
resource_size_t mmio_start_offs;
|
resource_size_t mmio_start_offs;
|
||||||
int ret;
|
int ret;
|
||||||
|
|
||||||
|
@ -1074,6 +1074,23 @@ int nouveau_load(struct drm_device *dev, unsigned long flags)
|
||||||
NV_INFO(dev, "Detected an NV%2x generation card (0x%08x)\n",
|
NV_INFO(dev, "Detected an NV%2x generation card (0x%08x)\n",
|
||||||
dev_priv->card_type, reg0);
|
dev_priv->card_type, reg0);
|
||||||
|
|
||||||
|
/* determine frequency of timing crystal */
|
||||||
|
strap = nv_rd32(dev, 0x101000);
|
||||||
|
if ( dev_priv->chipset < 0x17 ||
|
||||||
|
(dev_priv->chipset >= 0x20 && dev_priv->chipset <= 0x25))
|
||||||
|
strap &= 0x00000040;
|
||||||
|
else
|
||||||
|
strap &= 0x00400040;
|
||||||
|
|
||||||
|
switch (strap) {
|
||||||
|
case 0x00000000: dev_priv->crystal = 13500; break;
|
||||||
|
case 0x00000040: dev_priv->crystal = 14318; break;
|
||||||
|
case 0x00400000: dev_priv->crystal = 27000; break;
|
||||||
|
case 0x00400040: dev_priv->crystal = 25000; break;
|
||||||
|
}
|
||||||
|
|
||||||
|
NV_DEBUG(dev, "crystal freq: %dKHz\n", dev_priv->crystal);
|
||||||
|
|
||||||
/* Determine whether we'll attempt acceleration or not, some
|
/* Determine whether we'll attempt acceleration or not, some
|
||||||
* cards are disabled by default here due to them being known
|
* cards are disabled by default here due to them being known
|
||||||
* non-functional, or never been tested due to lack of hw.
|
* non-functional, or never been tested due to lack of hw.
|
||||||
|
|
Loading…
Reference in a new issue