[Intel-gfx] [PATCH 15/22] drm/i915/audio: Precompute the ELD
Jani Nikula
jani.nikula at linux.intel.com
Wed Oct 12 15:11:20 UTC 2022
On Tue, 11 Oct 2022, Ville Syrjala <ville.syrjala at linux.intel.com> wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> Stash the ELD into the crtc_state and precompute it. This gets
> rid of the ugly ELD mutation during intel_audio_codec_enable(),
> and opens the door for the state checker.
Should note the functional change of disabling audio up front if ELD is
bogus.
>
> Cc: Chaitanya Kumar Borah <chaitanya.kumar.borah at intel.com>
> Cc: Kai Vehmanen <kai.vehmanen at linux.intel.com>
> Cc: Takashi Iwai <tiwai at suse.de>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
I observe that I'm confused by DP MST audio and how it ties into this.
Reviewed-by: Jani Nikula <jani.nikula at intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_audio.c | 53 +++++++++++--------
> drivers/gpu/drm/i915/display/intel_audio.h | 5 ++
> .../drm/i915/display/intel_display_types.h | 2 +
> drivers/gpu/drm/i915/display/intel_dp.c | 4 +-
> drivers/gpu/drm/i915/display/intel_hdmi.c | 4 +-
> 5 files changed, 45 insertions(+), 23 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_audio.c b/drivers/gpu/drm/i915/display/intel_audio.c
> index 4eb5589a0f89..39291e870635 100644
> --- a/drivers/gpu/drm/i915/display/intel_audio.c
> +++ b/drivers/gpu/drm/i915/display/intel_audio.c
> @@ -334,8 +334,7 @@ static void g4x_audio_codec_enable(struct intel_encoder *encoder,
> {
> struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> - struct drm_connector *connector = conn_state->connector;
> - const u32 *eld = (const u32 *)connector->eld;
> + const u32 *eld = (const u32 *)crtc_state->eld;
> int eld_buffer_size, len, i;
>
> intel_crtc_wait_for_next_vblank(crtc);
> @@ -344,7 +343,7 @@ static void g4x_audio_codec_enable(struct intel_encoder *encoder,
> G4X_ELD_VALID | G4X_ELD_ADDRESS_MASK, 0);
>
> eld_buffer_size = g4x_eld_buffer_size(i915);
> - len = min(drm_eld_size(connector->eld) / 4, eld_buffer_size);
> + len = min(drm_eld_size(crtc_state->eld) / 4, eld_buffer_size);
>
> for (i = 0; i < len; i++)
> intel_de_write(i915, G4X_HDMIW_HDMIEDID, eld[i]);
> @@ -616,9 +615,8 @@ static void hsw_audio_codec_enable(struct intel_encoder *encoder,
> {
> struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> - struct drm_connector *connector = conn_state->connector;
> enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
> - const u32 *eld = (const u32 *)connector->eld;
> + const u32 *eld = (const u32 *)crtc_state->eld;
> int eld_buffer_size, len, i;
>
> mutex_lock(&i915->display.audio.mutex);
> @@ -642,7 +640,7 @@ static void hsw_audio_codec_enable(struct intel_encoder *encoder,
> IBX_ELD_ADDRESS_MASK, 0);
>
> eld_buffer_size = hsw_eld_buffer_size(i915, cpu_transcoder);
> - len = min(drm_eld_size(connector->eld) / 4, eld_buffer_size);
> + len = min(drm_eld_size(crtc_state->eld) / 4, eld_buffer_size);
>
> for (i = 0; i < len; i++)
> intel_de_write(i915, HSW_AUD_EDID_DATA(cpu_transcoder), eld[i]);
> @@ -744,8 +742,7 @@ static void ilk_audio_codec_enable(struct intel_encoder *encoder,
> {
> struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> - struct drm_connector *connector = conn_state->connector;
> - const u32 *eld = (const u32 *)connector->eld;
> + const u32 *eld = (const u32 *)crtc_state->eld;
> enum port port = encoder->port;
> enum pipe pipe = crtc->pipe;
> int eld_buffer_size, len, i;
> @@ -769,7 +766,7 @@ static void ilk_audio_codec_enable(struct intel_encoder *encoder,
> IBX_ELD_ADDRESS_MASK, 0);
>
> eld_buffer_size = ilk_eld_buffer_size(i915, pipe);
> - len = min(drm_eld_size(connector->eld) / 4, eld_buffer_size);
> + len = min(drm_eld_size(crtc_state->eld) / 4, eld_buffer_size);
>
> for (i = 0; i < len; i++)
> intel_de_write(i915, regs.hdmiw_hdmiedid, eld[i]);
> @@ -795,6 +792,30 @@ static void ilk_audio_codec_enable(struct intel_encoder *encoder,
> mutex_unlock(&i915->display.audio.mutex);
> }
>
> +bool intel_audio_compute_config(struct intel_encoder *encoder,
> + struct intel_crtc_state *crtc_state,
> + struct drm_connector_state *conn_state)
> +{
> + struct drm_i915_private *i915 = to_i915(encoder->base.dev);
> + struct drm_connector *connector = conn_state->connector;
> + const struct drm_display_mode *adjusted_mode =
> + &crtc_state->hw.adjusted_mode;
> +
> + if (!connector->eld[0]) {
> + drm_dbg_kms(&i915->drm,
> + "Bogus ELD on [CONNECTOR:%d:%s]\n",
> + connector->base.id, connector->name);
> + return false;
> + }
> +
> + BUILD_BUG_ON(sizeof(crtc_state->eld) != sizeof(connector->eld));
> + memcpy(crtc_state->eld, connector->eld, sizeof(crtc_state->eld));
> +
> + crtc_state->eld[6] = drm_av_sync_delay(connector, adjusted_mode) / 2;
> +
> + return true;
> +}
> +
> /**
> * intel_audio_codec_enable - Enable the audio codec for HD audio
> * @encoder: encoder on which to enable audio
> @@ -812,8 +833,6 @@ void intel_audio_codec_enable(struct intel_encoder *encoder,
> struct i915_audio_component *acomp = i915->display.audio.component;
> struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> struct drm_connector *connector = conn_state->connector;
> - const struct drm_display_mode *adjusted_mode =
> - &crtc_state->hw.adjusted_mode;
> enum port port = encoder->port;
> enum pipe pipe = crtc->pipe;
>
> @@ -823,15 +842,7 @@ void intel_audio_codec_enable(struct intel_encoder *encoder,
> drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s][ENCODER:%d:%s] Enable audio codec on pipe %c, %u bytes ELD\n",
> connector->base.id, connector->name,
> encoder->base.base.id, encoder->base.name,
> - pipe_name(pipe), drm_eld_size(connector->eld));
> -
> - /* FIXME precompute the ELD in .compute_config() */
> - if (!connector->eld[0])
> - drm_dbg_kms(&i915->drm,
> - "Bogus ELD on [CONNECTOR:%d:%s]\n",
> - connector->base.id, connector->name);
> -
> - connector->eld[6] = drm_av_sync_delay(connector, adjusted_mode) / 2;
> + pipe_name(pipe), drm_eld_size(crtc_state->eld));
>
> if (i915->display.funcs.audio)
> i915->display.funcs.audio->audio_codec_enable(encoder,
> @@ -854,7 +865,7 @@ void intel_audio_codec_enable(struct intel_encoder *encoder,
> (int) port, (int) pipe);
> }
>
> - intel_lpe_audio_notify(i915, pipe, port, connector->eld,
> + intel_lpe_audio_notify(i915, pipe, port, crtc_state->eld,
> crtc_state->port_clock,
> intel_crtc_has_dp_encoder(crtc_state));
> }
> diff --git a/drivers/gpu/drm/i915/display/intel_audio.h b/drivers/gpu/drm/i915/display/intel_audio.h
> index 63b22131dc45..b9070f336bcf 100644
> --- a/drivers/gpu/drm/i915/display/intel_audio.h
> +++ b/drivers/gpu/drm/i915/display/intel_audio.h
> @@ -6,12 +6,17 @@
> #ifndef __INTEL_AUDIO_H__
> #define __INTEL_AUDIO_H__
>
> +#include <linux/types.h>
> +
> struct drm_connector_state;
> struct drm_i915_private;
> struct intel_crtc_state;
> struct intel_encoder;
>
> void intel_audio_hooks_init(struct drm_i915_private *dev_priv);
> +bool intel_audio_compute_config(struct intel_encoder *encoder,
> + struct intel_crtc_state *crtc_state,
> + struct drm_connector_state *conn_state);
> void intel_audio_codec_enable(struct intel_encoder *encoder,
> const struct intel_crtc_state *crtc_state,
> const struct drm_connector_state *conn_state);
> diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
> index e2b853e9e51d..f378bcaf0f65 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -1248,6 +1248,8 @@ struct intel_crtc_state {
> struct drm_dp_vsc_sdp vsc;
> } infoframes;
>
> + u8 eld[MAX_ELD_BYTES];
> +
> /* HDMI scrambling status */
> bool hdmi_scrambling;
>
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
> index a060903891b2..d6c88f14d31d 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -2023,7 +2023,9 @@ intel_dp_compute_config(struct intel_encoder *encoder,
> if (HAS_PCH_SPLIT(dev_priv) && !HAS_DDI(dev_priv) && encoder->port != PORT_A)
> pipe_config->has_pch_encoder = true;
>
> - pipe_config->has_audio = intel_dp_has_audio(encoder, pipe_config, conn_state);
> + pipe_config->has_audio =
> + intel_dp_has_audio(encoder, pipe_config, conn_state) &&
> + intel_audio_compute_config(encoder, pipe_config, conn_state);
>
> fixed_mode = intel_panel_fixed_mode(connector, adjusted_mode);
> if (intel_dp_is_edp(intel_dp) && fixed_mode) {
> diff --git a/drivers/gpu/drm/i915/display/intel_hdmi.c b/drivers/gpu/drm/i915/display/intel_hdmi.c
> index 93519fb23d9d..d10998801228 100644
> --- a/drivers/gpu/drm/i915/display/intel_hdmi.c
> +++ b/drivers/gpu/drm/i915/display/intel_hdmi.c
> @@ -43,6 +43,7 @@
> #include "i915_debugfs.h"
> #include "i915_drv.h"
> #include "intel_atomic.h"
> +#include "intel_audio.h"
> #include "intel_connector.h"
> #include "intel_ddi.h"
> #include "intel_de.h"
> @@ -2261,7 +2262,8 @@ int intel_hdmi_compute_config(struct intel_encoder *encoder,
> pipe_config->has_pch_encoder = true;
>
> pipe_config->has_audio =
> - intel_hdmi_has_audio(encoder, pipe_config, conn_state);
> + intel_hdmi_has_audio(encoder, pipe_config, conn_state) &&
> + intel_audio_compute_config(encoder, pipe_config, conn_state);
>
> /*
> * Try to respect downstream TMDS clock limits first, if
--
Jani Nikula, Intel Open Source Graphics Center
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