On Fri, Sep 22, 2017 at 03:58:36PM +0000, vathsala nagaraju wrote:
> Set frames before SU entry value for max resync frame count of
> dpcd register 2009, bit field 0:3.
>
> v2 :
> - add macro EDP_PSR2_FRAME_BEFORE_SU (Rodrigo)
> - remove EDP_FRAMES_BEFORE_SU_ENTRY (Rodrigo)
> - add check ==1 for dpcd_read call (ville)
>
> Cc: Rodrigo Vivi <rodrigo.v...@intel.com>
> CC: Puthikorn Voravootivat <put...@chromium.org>
> Signed-off-by: Vathsala Nagaraju <vathsala.nagar...@intel.com>
Merged both patches to dinq. Thanks for the patches.
I'm anxiously waiting the PSR2 related workaroud(s)! ;)
Thanks,
Rodrigo.
> ---
> drivers/gpu/drm/i915/i915_reg.h | 2 +-
> drivers/gpu/drm/i915/intel_psr.c | 12 ++++++++++--
> 2 files changed, 11 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index 82f36dd..89c5249 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -170,6 +170,7 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg)
> (mask) << 16 | (value); })
> #define _MASKED_BIT_ENABLE(a) ({ typeof(a) _a = (a);
> _MASKED_FIELD(_a, _a); })
> #define _MASKED_BIT_DISABLE(a) (_MASKED_FIELD((a), 0))
> +#define EDP_PSR2_FRAME_BEFORE_SU(a) ((a) << EDP_PSR2_FRAME_BEFORE_SU_SHIFT)
>
> /* Engine ID */
>
> @@ -4047,7 +4048,6 @@ enum {
> #define EDP_PSR2_FRAME_BEFORE_SU_SHIFT 4
> #define EDP_PSR2_FRAME_BEFORE_SU_MASK (0xf<<4)
> #define EDP_PSR2_IDLE_MASK 0xf
> -#define EDP_FRAMES_BEFORE_SU_ENTRY (1<<4)
>
> #define EDP_PSR2_STATUS_CTL _MMIO(0x6f940)
> #define EDP_PSR2_STATUS_STATE_MASK (0xf<<28)
> diff --git a/drivers/gpu/drm/i915/intel_psr.c
> b/drivers/gpu/drm/i915/intel_psr.c
> index 0a17d1f..e505fa6 100644
> --- a/drivers/gpu/drm/i915/intel_psr.c
> +++ b/drivers/gpu/drm/i915/intel_psr.c
> @@ -327,6 +327,7 @@ static void hsw_activate_psr2(struct intel_dp *intel_dp)
> */
> uint32_t idle_frames = max(6, dev_priv->vbt.psr.idle_frames);
> uint32_t val;
> + uint8_t sink_latency;
>
> val = idle_frames << EDP_PSR_IDLE_FRAME_SHIFT;
>
> @@ -334,8 +335,15 @@ static void hsw_activate_psr2(struct intel_dp *intel_dp)
> * mesh at all with our frontbuffer tracking. And the hw alone isn't
> * good enough. */
> val |= EDP_PSR2_ENABLE |
> - EDP_SU_TRACK_ENABLE |
> - EDP_FRAMES_BEFORE_SU_ENTRY;
> + EDP_SU_TRACK_ENABLE;
> +
> + if (drm_dp_dpcd_readb(&intel_dp->aux, DP_SINK_SYNCHRONIZATION_LATENCY,
> + &sink_latency) == 1) {
> + sink_latency = sink_latency & DP_MAX_RESYNC_FRAME_CNT_MASK;
> + } else {
> + sink_latency = 0;
> + }
> + val |= EDP_PSR2_FRAME_BEFORE_SU(sink_latency + 1);
>
> if (dev_priv->vbt.psr.tp2_tp3_wakeup_time > 5)
> val |= EDP_PSR2_TP2_TIME_2500;
> --
> 1.9.1
>
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