On Mon, 28 Nov 2016, libin.yang@xxxxxxxxx wrote:
> From: Libin Yang <libin.yang@xxxxxxxxx>
>
> This patch adds support for DP MST audio in i915.
>
> Enable audio codec when DP MST is enabled if has_audio flag is set.
> Disable audio codec when DP MST is disabled if has_audio flag is set.
>
> Another separated patches to support DP MST audio will be implemented
> in audio driver.
>
> This patch is ported from
> commit 3708d5e082c3 ("drm/i915: start adding dp mst audio")
>
> And because commit 3708d5e082c3 ("drm/i915: start adding dp mst audio")
> breaks MST multi-monitor setups on some platforms, the orignal patch is
> reverted by
> commit be754b101f70 ("Revert "drm/i915: start adding dp mst audio"")
>
> As the multi-monitor setups issue is fixed, let's port the patch and
> enable the dp mst audio.
>
> Signed-off-by: Libin Yang <libin.yang@xxxxxxxxx>
> Cc: Lyude <cpaul@xxxxxxxxxx>
> Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
> Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
> Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@xxxxxxxxx>
Looks nicer now.
Reviewed-by: Jani Nikula <jani.nikula@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/intel_dp_mst.c | 16 ++++++++++++++++
> 1 file changed, 16 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
> index b029d10..1f98757f 100644
> --- a/drivers/gpu/drm/i915/intel_dp_mst.c
> +++ b/drivers/gpu/drm/i915/intel_dp_mst.c
> @@ -37,6 +37,8 @@ static bool intel_dp_mst_compute_config(struct intel_encoder *encoder,
> struct intel_dp_mst_encoder *intel_mst = enc_to_mst(&encoder->base);
> struct intel_digital_port *intel_dig_port = intel_mst->primary;
> struct intel_dp *intel_dp = &intel_dig_port->dp;
> + struct intel_connector *connector =
> + to_intel_connector(conn_state->connector);
> struct drm_atomic_state *state;
> int bpp;
> int lane_count, slots;
> @@ -58,6 +60,8 @@ static bool intel_dp_mst_compute_config(struct intel_encoder *encoder,
>
> state = pipe_config->base.state;
>
> + if (drm_dp_mst_port_has_audio(&intel_dp->mst_mgr, connector->port))
> + pipe_config->has_audio = true;
> mst_pbn = drm_dp_calc_pbn_mode(adjusted_mode->crtc_clock, bpp);
>
> pipe_config->pbn = mst_pbn;
> @@ -83,6 +87,7 @@ static void intel_mst_disable_dp(struct intel_encoder *encoder,
> struct intel_dp *intel_dp = &intel_dig_port->dp;
> struct intel_connector *connector =
> to_intel_connector(old_conn_state->connector);
> + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> int ret;
>
> DRM_DEBUG_KMS("%d\n", intel_dp->active_mst_links);
> @@ -93,6 +98,10 @@ static void intel_mst_disable_dp(struct intel_encoder *encoder,
> if (ret) {
> DRM_ERROR("failed to update payload %d\n", ret);
> }
> + if (old_crtc_state->has_audio) {
> + intel_audio_codec_disable(encoder);
> + intel_display_power_put(dev_priv, POWER_DOMAIN_AUDIO);
> + }
> }
>
> static void intel_mst_post_disable_dp(struct intel_encoder *encoder,
> @@ -205,6 +214,10 @@ static void intel_mst_enable_dp(struct intel_encoder *encoder,
> ret = drm_dp_check_act_status(&intel_dp->mst_mgr);
>
> ret = drm_dp_update_payload_part2(&intel_dp->mst_mgr);
> + if (pipe_config->has_audio) {
> + intel_display_power_get(dev_priv, POWER_DOMAIN_AUDIO);
> + intel_audio_codec_enable(encoder, pipe_config, conn_state);
> + }
> }
>
> static bool intel_dp_mst_enc_get_hw_state(struct intel_encoder *encoder,
> @@ -227,6 +240,9 @@ static void intel_dp_mst_enc_get_config(struct intel_encoder *encoder,
> enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
> u32 temp, flags = 0;
>
> + pipe_config->has_audio =
> + intel_ddi_is_audio_enabled(dev_priv, crtc);
> +
> temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
> if (temp & TRANS_DDI_PHSYNC)
> flags |= DRM_MODE_FLAG_PHSYNC;
--
Jani Nikula, Intel Open Source Technology Center
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