diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 10 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 26 |
2 files changed, 36 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index ee0d4f14ac98..39ad9327e2a0 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -3819,6 +3819,16 @@ enum { #define PWM2_GATING_DIS (1 << 14) #define PWM1_GATING_DIS (1 << 13) +#define _CLKGATE_DIS_PSL_A 0x46520 +#define _CLKGATE_DIS_PSL_B 0x46524 +#define _CLKGATE_DIS_PSL_C 0x46528 +#define DPF_GATING_DIS (1 << 10) +#define DPF_RAM_GATING_DIS (1 << 9) +#define DPFR_GATING_DIS (1 << 8) + +#define CLKGATE_DIS_PSL(pipe) \ + _MMIO_PIPE(pipe, _CLKGATE_DIS_PSL_A, _CLKGATE_DIS_PSL_B) + /* * GEN10 clock gating regs */ diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index c4b224a3a0ee..b7a6ddc6a66d 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -5459,6 +5459,20 @@ static bool hsw_crtc_supports_ips(struct intel_crtc *crtc) return HAS_IPS(to_i915(crtc->base.dev)) && crtc->pipe == PIPE_A; } +static void glk_pipe_scaler_clock_gating_wa(struct drm_i915_private *dev_priv, + enum pipe pipe, bool apply) +{ + u32 val = I915_READ(CLKGATE_DIS_PSL(pipe)); + u32 mask = DPF_GATING_DIS | DPF_RAM_GATING_DIS | DPFR_GATING_DIS; + + if (apply) + val |= mask; + else + val &= ~mask; + + I915_WRITE(CLKGATE_DIS_PSL(pipe), val); +} + static void haswell_crtc_enable(struct intel_crtc_state *pipe_config, struct drm_atomic_state *old_state) { @@ -5469,6 +5483,7 @@ static void haswell_crtc_enable(struct intel_crtc_state *pipe_config, enum transcoder cpu_transcoder = intel_crtc->config->cpu_transcoder; struct intel_atomic_state *old_intel_state = to_intel_atomic_state(old_state); + bool psl_clkgate_wa; if (WARN_ON(intel_crtc->active)) return; @@ -5522,6 +5537,12 @@ static void haswell_crtc_enable(struct intel_crtc_state *pipe_config, if (!transcoder_is_dsi(cpu_transcoder)) intel_ddi_enable_pipe_clock(pipe_config); + /* Display WA #1180: WaDisableScalarClockGating: glk, cnl */ + psl_clkgate_wa = (IS_GEMINILAKE(dev_priv) || IS_CANNONLAKE(dev_priv)) && + intel_crtc->config->pch_pfit.enabled; + if (psl_clkgate_wa) + glk_pipe_scaler_clock_gating_wa(dev_priv, pipe, true); + if (INTEL_GEN(dev_priv) >= 9) skylake_pfit_enable(intel_crtc); else @@ -5555,6 +5576,11 @@ static void haswell_crtc_enable(struct intel_crtc_state *pipe_config, intel_encoders_enable(crtc, pipe_config, old_state); + if (psl_clkgate_wa) { + intel_wait_for_vblank(dev_priv, pipe); + glk_pipe_scaler_clock_gating_wa(dev_priv, pipe, false); + } + if (intel_crtc->config->has_pch_encoder) { intel_wait_for_vblank(dev_priv, pipe); intel_wait_for_vblank(dev_priv, pipe); |