On Sat, Feb 1, 2014 at 1:16 PM, Alexandre Courbot <acourbot@xxxxxxxxxx> wrote: > GK20A's timer is directly attached to the system timer and cannot be > calibrated. Skip the calibration phase on that chip since the > corresponding registers do not exist. Just a curiosity: What timer resolution does the HW initialise at? > > Signed-off-by: Alexandre Courbot <acourbot@xxxxxxxxxx> > --- > drivers/gpu/drm/nouveau/core/subdev/timer/nv04.c | 19 +++++++++++++------ > 1 file changed, 13 insertions(+), 6 deletions(-) > > diff --git a/drivers/gpu/drm/nouveau/core/subdev/timer/nv04.c b/drivers/gpu/drm/nouveau/core/subdev/timer/nv04.c > index c0bdd10..822fe0d 100644 > --- a/drivers/gpu/drm/nouveau/core/subdev/timer/nv04.c > +++ b/drivers/gpu/drm/nouveau/core/subdev/timer/nv04.c > @@ -185,6 +185,10 @@ nv04_timer_init(struct nouveau_object *object) > if (ret) > return ret; > > + /* gk20a does not have the calibration registers */ > + if (device->chipset == 0xea) > + goto skip_clk_init; > + > /* aim for 31.25MHz, which gives us nanosecond timestamps */ > d = 1000000 / 32; > > @@ -235,20 +239,23 @@ nv04_timer_init(struct nouveau_object *object) > d >>= 1; > } > > - /* restore the time before suspend */ > - lo = priv->suspend_time; > - hi = (priv->suspend_time >> 32); > - > nv_debug(priv, "input frequency : %dHz\n", f); > nv_debug(priv, "input multiplier: %d\n", m); > nv_debug(priv, "numerator : 0x%08x\n", n); > nv_debug(priv, "denominator : 0x%08x\n", d); > nv_debug(priv, "timer frequency : %dHz\n", (f * m) * d / n); > - nv_debug(priv, "time low : 0x%08x\n", lo); > - nv_debug(priv, "time high : 0x%08x\n", hi); > > nv_wr32(priv, NV04_PTIMER_NUMERATOR, n); > nv_wr32(priv, NV04_PTIMER_DENOMINATOR, d); > + > +skip_clk_init: > + /* restore the time before suspend */ > + lo = priv->suspend_time; > + hi = (priv->suspend_time >> 32); > + > + nv_debug(priv, "time low : 0x%08x\n", lo); > + nv_debug(priv, "time high : 0x%08x\n", hi); > + > nv_wr32(priv, NV04_PTIMER_INTR_0, 0xffffffff); > nv_wr32(priv, NV04_PTIMER_INTR_EN_0, 0x00000000); > nv_wr32(priv, NV04_PTIMER_TIME_1, hi); > -- > 1.8.5.3 > > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/dri-devel -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
