On Thu, Sep 26, 2019 at 05:11:10PM -0700, Manasi Navare wrote:
> After the state is committed, we readout the HW registers and compare
> the HW state with the SW state that we just committed.
> For Transcdoer port sync, we add master_transcoder and the
> salves bitmask to the crtc_state, hence we need to read those during
> the HW state readout to avoid pipe state mismatch.
>
> v6:
> * Go through both parts of HW readout (Maarten)
> * Add a WARN if the same trans configured as
> master and slave (Ville, Maarten)
> v5:
> * Add return INVALID in defaut case (Maarten)
> v4:
> * Get power domains in master loop for get_config (Ville)
> v3:
> * Add TRANSCODER_D (Maarten)
> * v3 Reviewed-by: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
> v2:
> * Add Transcoder_D and MISSING_CASE (Maarten)
>
> Cc: Ville Syrjälä <ville.syrj...@linux.intel.com>
> Cc: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
> Cc: Matt Roper <matthew.d.ro...@intel.com>
> Cc: Jani Nikula <jani.nik...@intel.com>
> Signed-off-by: Manasi Navare <manasi.d.nav...@intel.com>
> Reviewed-by: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_display.c | 69 ++++++++++++++++++++
> 1 file changed, 69 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> index af6b8f10f132..6e4af6ded6f0 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -10510,6 +10510,72 @@ static void haswell_get_ddi_port_state(struct
> intel_crtc *crtc,
> }
> }
>
> +static enum transcoder transcoder_master(struct drm_i915_private *dev_priv,
> + enum transcoder cpu_transcoder)
> +{
> + u32 trans_port_sync, master_select;
> +
> + trans_port_sync = I915_READ(TRANS_DDI_FUNC_CTL2(cpu_transcoder));
> +
> + if ((trans_port_sync & PORT_SYNC_MODE_ENABLE) == 0)
> + return INVALID_TRANSCODER;
> +
> + master_select = trans_port_sync &
> + PORT_SYNC_MODE_MASTER_SELECT_MASK;
> + switch (master_select) {
> + case 1:
> + return TRANSCODER_A;
> + case 2:
> + return TRANSCODER_B;
> + case 3:
> + return TRANSCODER_C;
> + case 4:
> + return TRANSCODER_D;
Missing EDP. Also A-D are just master_select-1
> + default:
> + MISSING_CASE(master_select);
> + return INVALID_TRANSCODER;
> + }
> +}
> +
> +static void icelake_get_trans_port_sync_config(struct intel_crtc *crtc,
> + struct intel_crtc_state
> *pipe_config)
s/pipe_config/crtc_state/
'crtc' argument can be derived so doesn't need to be passed in.
> +{
> + struct drm_device *dev = crtc->base.dev;
> + struct drm_i915_private *dev_priv = to_i915(dev);
> + u32 transcoders;
> + enum transcoder cpu_transcoder;
> +
> + pipe_config->master_transcoder = transcoder_master(dev_priv,
> +
> pipe_config->cpu_transcoder);
> + if (pipe_config->master_transcoder != INVALID_TRANSCODER)
> + pipe_config->sync_mode_slaves_mask = 0;
Zeroing seems redundant.
> +
> + transcoders = BIT(TRANSCODER_A) |
> + BIT(TRANSCODER_B) |
> + BIT(TRANSCODER_C) |
> + BIT(TRANSCODER_D);
> + for_each_cpu_transcoder_masked(dev_priv, cpu_transcoder, transcoders) {
> + enum intel_display_power_domain power_domain;
> + intel_wakeref_t trans_wakeref;
> +
> + power_domain = POWER_DOMAIN_TRANSCODER(cpu_transcoder);
> + trans_wakeref = intel_display_power_get_if_enabled(dev_priv,
> +
> power_domain);
> +
> + if (!trans_wakeref)
> + continue;
> +
> + if (transcoder_master(dev_priv, cpu_transcoder) ==
> + pipe_config->cpu_transcoder)
> + pipe_config->sync_mode_slaves_mask |=
> BIT(cpu_transcoder);
> +
> + intel_display_power_put(dev_priv, power_domain, trans_wakeref);
> + }
> +
> + WARN_ON(pipe_config->master_transcoder != INVALID_TRANSCODER &&
> + pipe_config->sync_mode_slaves_mask);
> +}
> +
> static bool haswell_get_pipe_config(struct intel_crtc *crtc,
> struct intel_crtc_state *pipe_config)
> {
> @@ -10629,6 +10695,9 @@ static bool haswell_get_pipe_config(struct intel_crtc
> *crtc,
> pipe_config->pixel_multiplier = 1;
> }
>
> + if (INTEL_GEN(dev_priv) >= 11)
> + icelake_get_trans_port_sync_config(crtc, pipe_config);
> +
> out:
> for_each_power_domain(power_domain, power_domain_mask)
> intel_display_power_put(dev_priv,
> --
> 2.19.1
--
Ville Syrjälä
Intel
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