/* Fetch and adjust GPU GET pointer
*
* Returns:
* value >= 0, the adjusted GET pointer
* -EINVAL if GET pointer currently outside main push buffer
* -EBUSY if timeout exceeded
*/
static inline int
READ_GET(struct nouveau_channel *chan, uint64_t *prev_get, int *timeout)
{
uint64_t val;
val = nvif_rd32(&chan->user, chan->user_get);
if (chan->user_get_hi)
val |= (uint64_t)nvif_rd32(&chan->user, chan->user_get_hi) << 32;
/* reset counter as long as GET is still advancing, this is
* to avoid misdetecting a GPU lockup if the GPU happens to
* just be processing an operation that takes a long time
*/
if (val != *prev_get) {
*prev_get = val;
*timeout = 0;
}
if ((++*timeout & 0xff) == 0) {
udelay(1);
if (*timeout > 100000)
return -EBUSY;
}
if (val < chan->push.addr ||
val > chan->push.addr + (chan->dma.max << 2))
return -EINVAL;
return (val - chan->push.addr) >> 2;
}
static int
nv50_dma_push_wait(struct nouveau_channel *chan, int count)
{
uint32_t cnt = 0, prev_get = 0;
while (chan->dma.ib_free < count) {
uint32_t get = nvif_rd32(&chan->user, 0x88);
if (get != prev_get) {
prev_get = get;
cnt = 0;
}
if ((++cnt & 0xff) == 0) {
DRM_UDELAY(1);
if (cnt > 100000)
return -EBUSY;
}
chan->dma.ib_free = get - chan->dma.ib_put;
if (chan->dma.ib_free <= 0)
chan->dma.ib_free += chan->dma.ib_max;
}
return 0;
}
static int
nva3_get_intensity(struct backlight_device *bd)
{
struct nouveau_encoder *nv_encoder = bl_get_data(bd);
struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
struct nvif_object *device = &drm->client.device.object;
int or = ffs(nv_encoder->dcb->or) - 1;
u32 div, val;
div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
val = nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(or));
val &= NVA3_PDISP_SOR_PWM_CTL_VAL;
if (div && div >= val)
return ((val * 100) + (div / 2)) / div;
return 100;
}
static int
nv40_get_intensity(struct backlight_device *bd)
{
struct nouveau_encoder *nv_encoder = bl_get_data(bd);
struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
struct nvif_object *device = &drm->client.device.object;
int val = (nvif_rd32(device, NV40_PMC_BACKLIGHT) &
NV40_PMC_BACKLIGHT_MASK) >> 16;
return val;
}
static int
nv40_set_intensity(struct backlight_device *bd)
{
struct nouveau_encoder *nv_encoder = bl_get_data(bd);
struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
struct nvif_object *device = &drm->client.device.object;
int val = bd->props.brightness;
int reg = nvif_rd32(device, NV40_PMC_BACKLIGHT);
nvif_wr32(device, NV40_PMC_BACKLIGHT,
(val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK));
return 0;
}
static int
nv40_backlight_init(struct nouveau_encoder *encoder,
struct backlight_properties *props,
const struct backlight_ops **ops)
{
struct nouveau_drm *drm = nouveau_drm(encoder->base.base.dev);
struct nvif_object *device = &drm->client.device.object;
if (!(nvif_rd32(device, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK))
return -ENODEV;
props->type = BACKLIGHT_RAW;
props->max_brightness = 31;
*ops = &nv40_bl_ops;
return 0;
}
static int
nouveau_debugfs_strap_peek(struct seq_file *m, void *data)
{
struct drm_info_node *node = m->private;
struct nouveau_drm *drm = nouveau_drm(node->minor->dev);
int ret;
ret = pm_runtime_get_sync(drm->dev->dev);
if (ret < 0 && ret != -EACCES)
return ret;
seq_printf(m, "0x%08x\n",
nvif_rd32(&drm->client.device.object, 0x101000));
pm_runtime_mark_last_busy(drm->dev->dev);
pm_runtime_put_autosuspend(drm->dev->dev);
return 0;
}
static int
nva3_set_intensity(struct backlight_device *bd)
{
struct nouveau_encoder *nv_encoder = bl_get_data(bd);
struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
struct nvif_object *device = &drm->client.device.object;
int or = ffs(nv_encoder->dcb->or) - 1;
u32 div, val;
div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
val = (bd->props.brightness * div) / 100;
if (div) {
nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or),
val |
NV50_PDISP_SOR_PWM_CTL_NEW |
NVA3_PDISP_SOR_PWM_CTL_UNK);
return 0;
}
return -EINVAL;
}
static int
nv50_backlight_init(struct nouveau_encoder *nv_encoder,
struct backlight_properties *props,
const struct backlight_ops **ops)
{
struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
struct nvif_object *device = &drm->client.device.object;
if (!nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(ffs(nv_encoder->dcb->or) - 1)))
return -ENODEV;
if (drm->client.device.info.chipset <= 0xa0 ||
drm->client.device.info.chipset == 0xaa ||
drm->client.device.info.chipset == 0xac)
*ops = &nv50_bl_ops;
else
*ops = &nva3_bl_ops;
props->type = BACKLIGHT_RAW;
props->max_brightness = 100;
return 0;
}
u32
nv10_fence_read(struct nouveau_channel *chan)
{
return nvif_rd32(&chan->user, 0x0048);
}