[Intel-gfx] [PATCH 6/6] drm/i915/display/adl_p: Implement PSR changes

Souza, Jose jose.souza at intel.com
Thu Jun 24 23:27:22 UTC 2021


On Thu, 2021-06-24 at 16:19 +0000, Souza, Jose wrote:
> On Thu, 2021-06-24 at 09:22 -0700, José Roberto de Souza wrote:
> > On Wed, 2021-06-23 at 22:06 +0300, Gwan-gyeong Mun wrote:
> > > On 6/16/21 11:31 PM, José Roberto de Souza wrote:
> > > > Implements changes around PSR for alderlake-P:
> > > > 
> > > > - EDP_SU_TRACK_ENABLE was removed and bit 30 now has other function
> > > > - Some bits of PSR2_MAN_TRK_CTL moved and SF_PARTIAL_FRAME_UPDATE was
> > > >    removed setting SU_REGION_START/END_ADDR will do this job
> > > > - SU_REGION_START/END_ADDR have now line granularity but will need to
> > > >    be aligned with DSC when the PSRS + DSC support lands
> > > > 
> > > > BSpec: 50422
> > > > BSpec: 50424
> > > > Cc: Gwan-gyeong Mun <gwan-gyeong.mun at intel.com>
> > > > Cc: Anusha Srivatsa <anusha.srivatsa at intel.com>
> > > > Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
> > > > Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun at intel.com>
> > > > ---
> > > >   drivers/gpu/drm/i915/display/intel_psr.c | 43 ++++++++++++++++++------
> > > >   drivers/gpu/drm/i915/i915_reg.h          | 26 ++++++++------
> > > >   2 files changed, 48 insertions(+), 21 deletions(-)
> > > > 
> > > > diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
> > > > index 9643624fe160d..46bb19c4b63a4 100644
> > > > --- a/drivers/gpu/drm/i915/display/intel_psr.c
> > > > +++ b/drivers/gpu/drm/i915/display/intel_psr.c
> > > > @@ -534,11 +534,13 @@ static u32 intel_psr2_get_tp_time(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);
> > > > -	u32 val;
> > > > +	u32 val = EDP_PSR2_ENABLE;
> > > > +
> > > > +	val |= psr_compute_idle_frames(intel_dp) << EDP_PSR2_IDLE_FRAME_SHIFT;
> > > >   
> > > > -	val = psr_compute_idle_frames(intel_dp) << EDP_PSR2_IDLE_FRAME_SHIFT;
> > > > +	if (!IS_ALDERLAKE_P(dev_priv))
> > > > +		val |= EDP_SU_TRACK_ENABLE;
> > > >   
> > > > -	val |= EDP_PSR2_ENABLE | EDP_SU_TRACK_ENABLE;
> > > >   	if (DISPLAY_VER(dev_priv) >= 10 && DISPLAY_VER(dev_priv) <= 12)
> > > >   		val |= EDP_Y_COORDINATE_ENABLE;
> > > >   
> > > > @@ -793,6 +795,7 @@ static bool intel_psr2_sel_fetch_config_valid(struct intel_dp *intel_dp,
> > > >   static bool psr2_granularity_check(struct intel_dp *intel_dp,
> > > >   				   struct intel_crtc_state *crtc_state)
> > > >   {
> > > > +	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
> > > >   	const int crtc_hdisplay = crtc_state->hw.adjusted_mode.crtc_hdisplay;
> > > >   	const int crtc_vdisplay = crtc_state->hw.adjusted_mode.crtc_vdisplay;
> > > >   	u16 y_granularity = 0;
> > > > @@ -809,10 +812,13 @@ static bool psr2_granularity_check(struct intel_dp *intel_dp,
> > > >   		return intel_dp->psr.su_y_granularity == 4;
> > > >   
> > > >   	/*
> > > > -	 * For SW tracking we can adjust the y to match sink requirement if
> > > > -	 * multiple of 4
> > > > +	 * adl_p has 1 line granularity for other platforms with SW tracking we
> > > > +	 * can adjust the y coordinate to match sink requirement if multiple of
> > > > +	 * 4
> > > >   	 */
> > > > -	if (intel_dp->psr.su_y_granularity <= 2)
> > > > +	if (IS_ALDERLAKE_P(dev_priv))
> > > > +		y_granularity = intel_dp->psr.su_y_granularity;
> > > > +	else if (intel_dp->psr.su_y_granularity <= 2)
> > > >   		y_granularity = 4;
> > > >   	else if ((intel_dp->psr.su_y_granularity % 4) == 0)
> > > >   		y_granularity = intel_dp->psr.su_y_granularity;
> > > > @@ -1525,21 +1531,32 @@ void intel_psr2_program_trans_man_trk_ctl(const struct intel_crtc_state *crtc_st
> > > >   static void psr2_man_trk_ctl_calc(struct intel_crtc_state *crtc_state,
> > > >   				  struct drm_rect *clip, bool full_update)
> > > >   {
> > > > +	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> > > > +	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> > > >   	u32 val = PSR2_MAN_TRK_CTL_ENABLE;
> > > The logic is not wrong, but the meaning of the register bit has changed.
> > > The 31st bit in ADL-P means "SF partial frame enable".
> > > It is recommended to add a macro such as 
> > > ADLP_PSR2_MAN_TRK_CTL_SF_PARTIAL_FRAME_ENABLE to the code to clarify the 
> > > role of the changed register.
> > 
> > In my opinion the meaning is the same, enable manual/software tracking.
> > It was just a register rename done as part of changes of the other bits. 
> > 
> > But if you really think is necessary I can do that, please let me know.
> 
> And with or without that can I add your RVB?

I have pushed all the reviewed patches.

Another note about the requested change, we use PSR2_MAN_TRK_CTL_ENABLE in 3 different places.
Add a IS_ALDERLAKE_P() check in each place to use ADLP_PSR2_MAN_TRK_CTL_SF_PARTIAL_FRAME_ENABLE instead of PSR2_MAN_TRK_CTL_ENABLE and both having the
same value looks terrible.

> 
> > 
> > > >   
> > > >   	if (full_update) {
> > > > -		val |= PSR2_MAN_TRK_CTL_SF_SINGLE_FULL_FRAME;
> > > > +		if (IS_ALDERLAKE_P(dev_priv))
> > > > +			val |= ADLP_PSR2_MAN_TRK_CTL_SF_SINGLE_FULL_FRAME;
> > > > +		else
> > > > +			val |= PSR2_MAN_TRK_CTL_SF_SINGLE_FULL_FRAME;
> > > > +
> > > >   		goto exit;
> > > >   	}
> > > >   
> > > >   	if (clip->y1 == -1)
> > > >   		goto exit;
> > > >   
> > > > -	drm_WARN_ON(crtc_state->uapi.crtc->dev, clip->y1 % 4 || clip->y2 % 4);
> > > > +	if (IS_ALDERLAKE_P(dev_priv)) {
> > > > +		val |= ADLP_PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR(clip->y1);
> > > > +		val |= ADLP_PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR(clip->y2);
> > > > +	} else {
> > > > +		drm_WARN_ON(crtc_state->uapi.crtc->dev, clip->y1 % 4 || clip->y2 % 4);
> > > >   
> > > > -	val |= PSR2_MAN_TRK_CTL_SF_PARTIAL_FRAME_UPDATE;
> > > > -	val |= PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR(clip->y1 / 4 + 1);
> > > > -	val |= PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR(clip->y2 / 4 + 1);
> > > > +		val |= PSR2_MAN_TRK_CTL_SF_PARTIAL_FRAME_UPDATE;
> > > > +		val |= PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR(clip->y1 / 4 + 1);
> > > > +		val |= PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR(clip->y2 / 4 + 1);
> > > > +	}
> > > >   exit:
> > > >   	crtc_state->psr2_man_track_ctl = val;
> > > >   }
> > > > @@ -1563,11 +1580,15 @@ static void clip_area_update(struct drm_rect *overlap_damage_area,
> > > >   static void intel_psr2_sel_fetch_pipe_alignment(const struct intel_crtc_state *crtc_state,
> > > >   						struct drm_rect *pipe_clip)
> > > >   {
> > > > +	struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
> > > >   	const u16 y_alignment = crtc_state->su_y_granularity;
> > > >   
> > > >   	pipe_clip->y1 -= pipe_clip->y1 % y_alignment;
> > > >   	if (pipe_clip->y2 % y_alignment)
> > > >   		pipe_clip->y2 = ((pipe_clip->y2 / y_alignment) + 1) * y_alignment;
> > > > +
> > > > +	if (IS_ALDERLAKE_P(dev_priv) && crtc_state->dsc.compression_enable)
> > > > +		drm_warn(&dev_priv->drm, "Missing PSR2 sel fetch alignment with DSC\n");
> > > >   }
> > > >   
> > > >   int intel_psr2_sel_fetch_update(struct intel_atomic_state *state,
> > > > diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> > > > index e0bd60fe7a190..74dc5ebce60e7 100644
> > > > --- a/drivers/gpu/drm/i915/i915_reg.h
> > > > +++ b/drivers/gpu/drm/i915/i915_reg.h
> > > > @@ -4586,7 +4586,7 @@ enum {
> > > >   #define _PSR2_CTL_EDP				0x6f900
> > > >   #define EDP_PSR2_CTL(tran)			_MMIO_TRANS2(tran, _PSR2_CTL_A)
> > > >   #define   EDP_PSR2_ENABLE			(1 << 31)
> > > > -#define   EDP_SU_TRACK_ENABLE			(1 << 30)
> > > > +#define   EDP_SU_TRACK_ENABLE			(1 << 30) /* up to adl-p */
> > > >   #define   TGL_EDP_PSR2_BLOCK_COUNT_NUM_2	(0 << 28)
> > > >   #define   TGL_EDP_PSR2_BLOCK_COUNT_NUM_3	(1 << 28)
> > > >   #define   EDP_Y_COORDINATE_ENABLE		REG_BIT(25) /* display 10, 11 and 12 */
> > > > @@ -4655,17 +4655,23 @@ enum {
> > > >   #define PSR2_SU_STATUS_MASK(frame)	(0x3ff << PSR2_SU_STATUS_SHIFT(frame))
> > > >   #define PSR2_SU_STATUS_FRAMES		8
> > > >   
> > > > -#define _PSR2_MAN_TRK_CTL_A				0x60910
> > > > -#define _PSR2_MAN_TRK_CTL_EDP				0x6f910
> > > > -#define PSR2_MAN_TRK_CTL(tran)				_MMIO_TRANS2(tran, _PSR2_MAN_TRK_CTL_A)
> > > > -#define  PSR2_MAN_TRK_CTL_ENABLE			REG_BIT(31)
> > > > -#define  PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR_MASK	REG_GENMASK(30, 21)
> > > > -#define  PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR(val)	REG_FIELD_PREP(PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR_MASK, val)
> > > > +#define _PSR2_MAN_TRK_CTL_A					0x60910
> > > > +#define _PSR2_MAN_TRK_CTL_EDP					0x6f910
> > > > +#define PSR2_MAN_TRK_CTL(tran)					_MMIO_TRANS2(tran, _PSR2_MAN_TRK_CTL_A)
> > > > +#define  PSR2_MAN_TRK_CTL_ENABLE				REG_BIT(31)
> > > > +#define  PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR_MASK		REG_GENMASK(30, 21)
> > > > +#define  PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR(val)		REG_FIELD_PREP(PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR_MASK, val)
> > > >   #define  PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR_MASK		REG_GENMASK(20, 11)
> > > >   #define  PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR(val)		REG_FIELD_PREP(PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR_MASK, val)
> > > > -#define  PSR2_MAN_TRK_CTL_SF_SINGLE_FULL_FRAME		REG_BIT(3)
> > > > -#define  PSR2_MAN_TRK_CTL_SF_CONTINUOS_FULL_FRAME	REG_BIT(2)
> > > > -#define  PSR2_MAN_TRK_CTL_SF_PARTIAL_FRAME_UPDATE	REG_BIT(1)
> > > > +#define  PSR2_MAN_TRK_CTL_SF_SINGLE_FULL_FRAME			REG_BIT(3)
> > > > +#define  PSR2_MAN_TRK_CTL_SF_CONTINUOS_FULL_FRAME		REG_BIT(2)
> > > > +#define  PSR2_MAN_TRK_CTL_SF_PARTIAL_FRAME_UPDATE		REG_BIT(1)
> > > > +#define  ADLP_PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR_MASK	REG_GENMASK(28, 16)
> > > > +#define  ADLP_PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR(val)	REG_FIELD_PREP(ADLP_PSR2_MAN_TRK_CTL_SU_REGION_START_ADDR_MASK, val)
> > > > +#define  ADLP_PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR_MASK		REG_GENMASK(12, 0)
> > > > +#define  ADLP_PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR(val)		REG_FIELD_PREP(ADLP_PSR2_MAN_TRK_CTL_SU_REGION_END_ADDR_MASK, val)
> > > > +#define  ADLP_PSR2_MAN_TRK_CTL_SF_SINGLE_FULL_FRAME		REG_BIT(14)
> > > > +#define  ADLP_PSR2_MAN_TRK_CTL_SF_CONTINUOS_FULL_FRAME		REG_BIT(13)
> > > >   
> > > >   /* Icelake DSC Rate Control Range Parameter Registers */
> > > >   #define DSCA_RC_RANGE_PARAMETERS_0		_MMIO(0x6B240)
> > > > 
> > 
> 
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