> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx> On Behalf Of Ville
> Syrjala
> Sent: Saturday, November 14, 2020 3:34 AM
> To: intel-gfx@xxxxxxxxxxxxxxxxxxxxx
> Subject: [PATCH 13/23] drm/i915/dp: Master/Slave enable/disable
> sequence for bigjoiner
>
> From: Manasi Navare <manasi.d.navare@xxxxxxxxx>
>
> Enabling is done in a special sequence and so should plane updates be. Ideally
> the end user never notices the second pipe is used.
>
> This way ideally everything will be tear free, and updates are really atomic as
> userspace expects it.
>
> This uses generic modeset_enables() calls like trans port sync but still has special
> handling for disable since for slave we should not disable things like encoder, plls
> that are not enabled for slave.
>
> Signed-off-by: Manasi Navare <manasi.d.navare@xxxxxxxxx>
> [vsyrjala: Appease checkpatch]
> Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Reviewed-by: Animesh Manna <animesh.manna@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/display/intel_ddi.c | 25 +++-
> drivers/gpu/drm/i915/display/intel_display.c | 126 +++++++++++++++----
> 2 files changed, 122 insertions(+), 29 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c
> b/drivers/gpu/drm/i915/display/intel_ddi.c
> index 439b92710fe6..9c4ad0392025 100644
> --- a/drivers/gpu/drm/i915/display/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/display/intel_ddi.c
> @@ -28,6 +28,7 @@
> #include <drm/drm_scdc_helper.h>
>
> #include "i915_drv.h"
> +#include "i915_trace.h"
> #include "intel_audio.h"
> #include "intel_combo_phy.h"
> #include "intel_connector.h"
> @@ -3664,7 +3665,8 @@ static void tgl_ddi_pre_enable_dp(struct
> intel_atomic_state *state,
>
> /* 7.l Configure and enable FEC if needed */
> intel_ddi_enable_fec(encoder, crtc_state);
> - intel_dsc_enable(encoder, crtc_state);
> + if (!crtc_state->bigjoiner)
> + intel_dsc_enable(encoder, crtc_state);
> }
>
> static void hsw_ddi_pre_enable_dp(struct intel_atomic_state *state, @@ -
> 3736,7 +3738,8 @@ static void hsw_ddi_pre_enable_dp(struct
> intel_atomic_state *state,
> if (!is_mst)
> intel_ddi_enable_pipe_clock(encoder, crtc_state);
>
> - intel_dsc_enable(encoder, crtc_state);
> + if (!crtc_state->bigjoiner)
> + intel_dsc_enable(encoder, crtc_state);
> }
>
> static void intel_ddi_pre_enable_dp(struct intel_atomic_state *state, @@ -
> 3987,6 +3990,21 @@ static void intel_ddi_post_disable(struct
> intel_atomic_state *state,
> ilk_pfit_disable(old_crtc_state);
> }
>
> + if (old_crtc_state->bigjoiner_linked_crtc) {
> + struct intel_atomic_state *state =
> + to_intel_atomic_state(old_crtc_state->uapi.state);
> + struct intel_crtc *slave =
> + old_crtc_state->bigjoiner_linked_crtc;
> + const struct intel_crtc_state *old_slave_crtc_state =
> + intel_atomic_get_old_crtc_state(state, slave);
> +
> + intel_crtc_vblank_off(old_slave_crtc_state);
> + trace_intel_pipe_disable(slave);
> +
> + intel_dsc_disable(old_slave_crtc_state);
> + skl_scaler_disable(old_slave_crtc_state);
> + }
> +
> /*
> * When called from DP MST code:
> * - old_conn_state will be NULL
> @@ -4205,7 +4223,8 @@ static void intel_enable_ddi(struct intel_atomic_state
> *state, {
> drm_WARN_ON(state->base.dev, crtc_state->has_pch_encoder);
>
> - intel_ddi_enable_transcoder_func(encoder, crtc_state);
> + if (!crtc_state->bigjoiner_slave)
> + intel_ddi_enable_transcoder_func(encoder, crtc_state);
>
> intel_enable_pipe(crtc_state);
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> index aea2ff3ef8c4..60669bef659f 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -7138,6 +7138,45 @@ static void hsw_set_frame_start_delay(const struct
> intel_crtc_state *crtc_state)
> intel_de_write(dev_priv, reg, val);
> }
>
> +static void icl_ddi_bigjoiner_pre_enable(struct intel_atomic_state *state,
> + const struct intel_crtc_state
> *crtc_state) {
> + struct intel_crtc *master = to_intel_crtc(crtc_state->uapi.crtc);
> + struct intel_crtc_state *master_crtc_state;
> + struct drm_connector_state *conn_state;
> + struct drm_connector *conn;
> + struct intel_encoder *encoder = NULL;
> + int i;
> +
> + if (crtc_state->bigjoiner_slave)
> + master = crtc_state->bigjoiner_linked_crtc;
> +
> + master_crtc_state = intel_atomic_get_new_crtc_state(state, master);
> +
> + for_each_new_connector_in_state(&state->base, conn, conn_state, i) {
> + if (conn_state->crtc != &master->base)
> + continue;
> +
> + encoder = to_intel_encoder(conn_state->best_encoder);
> + break;
> + }
> +
> + if (!crtc_state->bigjoiner_slave) {
> + /* need to enable VDSC, which we skipped in pre-enable */
> + intel_dsc_enable(encoder, crtc_state);
> + } else {
> + /*
> + * Enable sequence steps 1-7 on bigjoiner master
> + */
> + intel_encoders_pre_pll_enable(state, master);
> + intel_enable_shared_dpll(master_crtc_state);
> + intel_encoders_pre_enable(state, master);
> +
> + /* and DSC on slave */
> + intel_dsc_enable(NULL, crtc_state);
> + }
> +}
> +
> static void hsw_crtc_enable(struct intel_atomic_state *state,
> struct intel_crtc *crtc)
> {
> @@ -7151,35 +7190,40 @@ static void hsw_crtc_enable(struct
> intel_atomic_state *state,
> if (drm_WARN_ON(&dev_priv->drm, crtc->active))
> return;
>
> - intel_encoders_pre_pll_enable(state, crtc);
> + if (!new_crtc_state->bigjoiner) {
> + intel_encoders_pre_pll_enable(state, crtc);
>
> - if (new_crtc_state->shared_dpll)
> - intel_enable_shared_dpll(new_crtc_state);
> + if (new_crtc_state->shared_dpll)
> + intel_enable_shared_dpll(new_crtc_state);
>
> - intel_encoders_pre_enable(state, crtc);
> -
> - if (!transcoder_is_dsi(cpu_transcoder))
> - intel_set_transcoder_timings(new_crtc_state);
> -
> - intel_set_pipe_src_size(new_crtc_state);
> -
> - if (cpu_transcoder != TRANSCODER_EDP &&
> - !transcoder_is_dsi(cpu_transcoder))
> - intel_de_write(dev_priv, PIPE_MULT(cpu_transcoder),
> - new_crtc_state->pixel_multiplier - 1);
> -
> - if (new_crtc_state->has_pch_encoder)
> - intel_cpu_transcoder_set_m_n(new_crtc_state,
> - &new_crtc_state->fdi_m_n, NULL);
> -
> - if (!transcoder_is_dsi(cpu_transcoder)) {
> - hsw_set_frame_start_delay(new_crtc_state);
> - hsw_set_pipeconf(new_crtc_state);
> + intel_encoders_pre_enable(state, crtc);
> + } else {
> + icl_ddi_bigjoiner_pre_enable(state, new_crtc_state);
> }
>
> + intel_set_pipe_src_size(new_crtc_state);
> if (INTEL_GEN(dev_priv) >= 9 || IS_BROADWELL(dev_priv))
> bdw_set_pipemisc(new_crtc_state);
>
> + if (!new_crtc_state->bigjoiner_slave ||
> !transcoder_is_dsi(cpu_transcoder)) {
> + if (!transcoder_is_dsi(cpu_transcoder))
> + intel_set_transcoder_timings(new_crtc_state);
> +
> + if (cpu_transcoder != TRANSCODER_EDP &&
> + !transcoder_is_dsi(cpu_transcoder))
> + intel_de_write(dev_priv, PIPE_MULT(cpu_transcoder),
> + new_crtc_state->pixel_multiplier - 1);
> +
> + if (new_crtc_state->has_pch_encoder)
> + intel_cpu_transcoder_set_m_n(new_crtc_state,
> + &new_crtc_state->fdi_m_n,
> NULL);
> +
> + hsw_set_frame_start_delay(new_crtc_state);
> + }
> +
> + if (!transcoder_is_dsi(cpu_transcoder))
> + hsw_set_pipeconf(new_crtc_state);
> +
> crtc->active = true;
>
> /* Display WA #1180: WaDisableScalarClockGating: glk, cnl */ @@ -
> 7214,6 +7258,11 @@ static void hsw_crtc_enable(struct intel_atomic_state
> *state,
> if (INTEL_GEN(dev_priv) >= 11)
> icl_pipe_mbus_enable(crtc);
>
> + if (new_crtc_state->bigjoiner_slave) {
> + trace_intel_pipe_enable(crtc);
> + intel_crtc_vblank_on(new_crtc_state);
> + }
> +
> intel_encoders_enable(state, crtc);
>
> if (psl_clkgate_wa) {
> @@ -15669,6 +15718,9 @@ static void intel_enable_crtc(struct
> intel_atomic_state *state,
>
> dev_priv->display.crtc_enable(state, crtc);
>
> + if (new_crtc_state->bigjoiner_slave)
> + return;
> +
> /* vblanks work again, re-enable pipe CRC. */
> intel_crtc_enable_pipe_crc(crtc);
> }
> @@ -15731,8 +15783,21 @@ static void intel_old_crtc_state_disables(struct
> intel_atomic_state *state, {
> struct drm_i915_private *dev_priv = to_i915(state->base.dev);
>
> + drm_WARN_ON(&dev_priv->drm, old_crtc_state->bigjoiner_slave);
> +
> intel_crtc_disable_planes(state, crtc);
>
> + /*
> + * We still need special handling for disabling bigjoiner master
> + * and slaves since for slave we do not have encoder or plls
> + * so we dont need to disable those.
> + */
> + if (old_crtc_state->bigjoiner) {
> + intel_crtc_disable_planes(state,
> + old_crtc_state-
> >bigjoiner_linked_crtc);
> + old_crtc_state->bigjoiner_linked_crtc->active = false;
> + }
> +
> /*
> * We need to disable pipe CRC before disabling the pipe,
> * or we race against vblank off.
> @@ -15761,7 +15826,7 @@ static void intel_commit_modeset_disables(struct
> intel_atomic_state *state)
> /* Only disable port sync and MST slaves */
> for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
> new_crtc_state, i) {
> - if (!needs_modeset(new_crtc_state))
> + if (!needs_modeset(new_crtc_state) || old_crtc_state-
> >bigjoiner)
> continue;
>
> if (!old_crtc_state->hw.active)
> @@ -15786,10 +15851,18 @@ static void
> intel_commit_modeset_disables(struct intel_atomic_state *state)
> for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
> new_crtc_state, i) {
> if (!needs_modeset(new_crtc_state) ||
> - (handled & BIT(crtc->pipe)))
> + (handled & BIT(crtc->pipe)) ||
> + old_crtc_state->bigjoiner_slave)
> continue;
>
> intel_pre_plane_update(state, crtc);
> + if (old_crtc_state->bigjoiner) {
> + struct intel_crtc *slave =
> + old_crtc_state->bigjoiner_linked_crtc;
> +
> + intel_pre_plane_update(state, slave);
> + }
> +
> if (old_crtc_state->hw.active)
> intel_old_crtc_state_disables(state, old_crtc_state,
> new_crtc_state, crtc);
> @@ -15887,7 +15960,8 @@ static void skl_commit_modeset_enables(struct
> intel_atomic_state *state)
> continue;
>
> if (intel_dp_mst_is_slave_trans(new_crtc_state) ||
> - is_trans_port_sync_master(new_crtc_state))
> + is_trans_port_sync_master(new_crtc_state) ||
> + (new_crtc_state->bigjoiner && !new_crtc_state-
> >bigjoiner_slave))
> continue;
>
> modeset_pipes &= ~BIT(pipe);
> @@ -15897,7 +15971,7 @@ static void skl_commit_modeset_enables(struct
> intel_atomic_state *state)
>
> /*
> * Then we enable all remaining pipes that depend on other
> - * pipes: MST slaves and port sync masters.
> + * pipes: MST slaves and port sync masters, big joiner master
> */
> for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) {
> enum pipe pipe = crtc->pipe;
> --
> 2.26.2
>
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