On Thu, 2018-11-29 at 15:07 -0800, Rodrigo Vivi wrote:
> On Mon, Nov 26, 2018 at 04:37:08PM -0800, José Roberto de Souza
> wrote:
> > The first 8 bits of PSR2_CTL have 2 fields to set frames count, the
> > first one is to set how many idle frames PSR2 HW needs to wait
> > before
> > enter in deep sleep and the second one it is how many frames(it
> > don't
> > need to be idle frames) PSR2 HW will wait before start the PSR
> > activation sequence.
> > The previous names was really misleading and caused wrong values
The idea was to setup a conservative configuration for PSR2 until we
were ready to enable the feature and some testing was done. Not sure
why you think the values are wrong.
> > being
> > set so better rename to make it clear.
>
> I honestly prefer the old names for 2 reasons:
>
> - they are shorter
> - they follow the exact name we have on spec
+1 for the above reason.
>
> >
> > Also taking the oportunity to improve those macros.
> >
> > Cc: Rodrigo Vivi <rodrigo.v...@intel.com>
> > Cc: Dhinakaran Pandiyan <dhinakaran.pandi...@intel.com>
> > Signed-off-by: José Roberto de Souza <jose.so...@intel.com>
> > ---
> > drivers/gpu/drm/i915/i915_reg.h | 35 ++++++++++++++++----------
> > ------
> > drivers/gpu/drm/i915/intel_psr.c | 7 ++++---
> > 2 files changed, 22 insertions(+), 20 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/i915_reg.h
> > b/drivers/gpu/drm/i915/i915_reg.h
> > index 47baf2fe8f71..73046bb9ec7c 100644
> > --- a/drivers/gpu/drm/i915/i915_reg.h
> > +++ b/drivers/gpu/drm/i915/i915_reg.h
> > @@ -4203,23 +4203,24 @@ enum {
> > #define EDP_PSR_DEBUG_MASK_DISP_REG_WRITE (1 << 16) /*
> > Reserved in ICL+ */
> > #define EDP_PSR_DEBUG_EXIT_ON_PIXEL_UNDERRUN (1 << 15) /* SKL+
> > */
> >
> > -#define EDP_PSR2_CTL _MMIO(0x6f900)
> > -#define EDP_PSR2_ENABLE (1 << 31)
> > -#define EDP_SU_TRACK_ENABLE (1 << 30)
> > -#define EDP_Y_COORDINATE_VALID (1 << 26) /* GLK and CNL+ */
> > -#define EDP_Y_COORDINATE_ENABLE (1 << 25) /* GLK and CNL+ */
> > -#define EDP_MAX_SU_DISABLE_TIME(t) ((t) << 20)
> > -#define EDP_MAX_SU_DISABLE_TIME_MASK (0x1f << 20)
> > -#define EDP_PSR2_TP2_TIME_500us (0 << 8)
> > -#define EDP_PSR2_TP2_TIME_100us (1 << 8)
> > -#define EDP_PSR2_TP2_TIME_2500us (2 << 8)
> > -#define EDP_PSR2_TP2_TIME_50us (3 << 8)
> > -#define EDP_PSR2_TP2_TIME_MASK (3 << 8)
> > -#define EDP_PSR2_FRAME_BEFORE_SU_SHIFT 4
> > -#define EDP_PSR2_FRAME_BEFORE_SU_MASK (0xf << 4)
> > -#define EDP_PSR2_FRAME_BEFORE_SU(a) ((a) << 4)
> > -#define EDP_PSR2_IDLE_FRAME_MASK 0xf
> > -#define EDP_PSR2_IDLE_FRAME_SHIFT 0
> > +#define EDP_PSR2_CTL _MMIO(0
> > x6f900)
> > +#define EDP_PSR2_ENABLE (1 << 31)
> > +#define EDP_SU_TRACK_ENABLE (1 <<
> > 30)
> > +#define EDP_Y_COORDINATE_VALID (1 << 26) /*
> > GLK and CNL+ */
> > +#define EDP_Y_COORDINATE_ENABLE (1 << 25) /*
> > GLK and CNL+ */
> > +#define EDP_MAX_SU_DISABLE_TIME(t) ((t) <<
> > 20)
> > +#define EDP_MAX_SU_DISABLE_TIME_MASK (0x1f
> > << 20)
> > +#define EDP_PSR2_TP2_TIME_500us (0 << 8)
> > +#define EDP_PSR2_TP2_TIME_100us (1 << 8)
> > +#define EDP_PSR2_TP2_TIME_2500us (2 << 8)
> > +#define EDP_PSR2_TP2_TIME_50us (3 << 8)
> > +#define EDP_PSR2_TP2_TIME_MASK (3 << 8)
> > +#define EDP_PSR2_FRAMES_BEFORE_ACTIVATE_SHIFT (4)
> > +#define EDP_PSR2_FRAMES_BEFORE_ACTIVATE_MASK (0xf <<
> > EDP_PSR2_FRAMES_BEFORE_ACTIVATE_SHIFT)
> > +#define EDP_PSR2_FRAMES_BEFORE_ACTIVATE(n) (((n)
> > << EDP_PSR2_FRAMES_BEFORE_ACTIVATE_SHIFT) &
> > EDP_PSR2_FRAMES_BEFORE_ACTIVATE_MASK)
> > +#define EDP_PSR2_IDLE_FRAMES_TO_DEEP_SLEEP_MASK (0xf)
> > +#define EDP_PSR2_IDLE_FRAMES_TO_DEEP_SLEEP_SHIFT (0)
> > +#define EDP_PSR2_IDLE_FRAMES_TO_DEEP_SLEEP(n) (((n)
> > << EDP_PSR2_IDLE_FRAMES_TO_DEEP_SLEEP_SHIFT) &
> > EDP_PSR2_IDLE_FRAMES_TO_DEEP_SLEEP_MASK)
> >
> > #define _PSR_EVENT_TRANS_A 0x60848
> > #define _PSR_EVENT_TRANS_B 0x61848
> > diff --git a/drivers/gpu/drm/i915/intel_psr.c
> > b/drivers/gpu/drm/i915/intel_psr.c
> > index 9215c9052381..ba7bbe3f8df2 100644
> > --- a/drivers/gpu/drm/i915/intel_psr.c
> > +++ b/drivers/gpu/drm/i915/intel_psr.c
> > @@ -479,6 +479,7 @@ static void hsw_activate_psr1(struct intel_dp
> > *intel_dp)
> > static void hsw_activate_psr2(struct intel_dp *intel_dp)
> > {
> > struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> > + struct i915_psr *psr = &dev_priv->psr;
> > u32 val;
> >
> > /* Let's use 6 as the minimum to cover all known cases
> > including the
> > @@ -486,8 +487,8 @@ static void hsw_activate_psr2(struct intel_dp
> > *intel_dp)
> > */
> > int idle_frames = max(6, dev_priv->vbt.psr.idle_frames);
> >
> > - idle_frames = max(idle_frames, dev_priv->psr.sink_sync_latency
> > + 1);
> > - val = idle_frames << EDP_PSR2_IDLE_FRAME_SHIFT;
> > + idle_frames = max(idle_frames, psr->sink_sync_latency + 1);
> > + val = EDP_PSR2_IDLE_FRAMES_TO_DEEP_SLEEP(idle_frames);
> >
> > /* FIXME: selective update is probably totally broken because
> > it doesn't
> > * mesh at all with our frontbuffer tracking. And the hw alone
> > isn't
> > @@ -496,7 +497,7 @@ static void hsw_activate_psr2(struct intel_dp
> > *intel_dp)
> > if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv))
> > val |= EDP_Y_COORDINATE_ENABLE;
> >
> > - val |= EDP_PSR2_FRAME_BEFORE_SU(dev_priv->psr.sink_sync_latency
> > + 1);
> > + val |= EDP_PSR2_FRAMES_BEFORE_ACTIVATE(psr->sink_sync_latency +
> > 1);
> >
> > if (dev_priv->vbt.psr.tp2_tp3_wakeup_time_us >= 0 &&
> > dev_priv->vbt.psr.tp2_tp3_wakeup_time_us <= 50)
> > --
> > 2.19.2
> >
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