On Wed, Oct 21, 2020 at 10:42:17PM -0700, Manasi Navare wrote:
> From: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
>
> When the clock is higher than the dotclock, try with 2 pipes enabled.
> If we can enable 2, then we will go into big joiner mode, and steal
> the adjacent crtc.
>
> This only links the crtc's in software, no hardware or plane
> programming is done yet. Blobs are also copied from the master's
> crtc_state, so it doesn't depend at commit time on the other
> crtc_state.
>
> v4:
> * Fixes in intel_crtc_compute_config (Ville)
> v3:
> * Manual Rebase (Manasi)
> Changes since v1:
> - Rename pipe timings to transcoder timings, as they are now different.
> Changes since v2:
> - Rework bigjoiner checks; always disable slave when recalculating
> master. No need to have a separate bigjoiner pass any more.
> - Use pipe_mode instead of transcoder_mode, to clean up the code.
>
> Signed-off-by: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
> Signed-off-by: Manasi Navare <manasi.d.nav...@intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_display.c | 181 ++++++++++++++++--
> .../drm/i915/display/intel_display_types.h | 9 +
> drivers/gpu/drm/i915/display/intel_dp.c | 22 ++-
> 3 files changed, 191 insertions(+), 21 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> index 92cd38964142..ffee6afe4ddb 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -8237,9 +8237,24 @@ static int intel_crtc_compute_config(struct intel_crtc
> *crtc,
> struct intel_crtc_state *pipe_config)
> {
> struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
> - const struct drm_display_mode *pipe_mode = &pipe_config->hw.pipe_mode;
> + struct drm_display_mode *pipe_mode = &pipe_config->hw.pipe_mode;
> int clock_limit = dev_priv->max_dotclk_freq;
>
> + *pipe_mode = pipe_config->hw.adjusted_mode;
> +
> + /* Adjust pipe_mode for bigjoiner, with half the horizontal mode */
> + if (pipe_config->bigjoiner) {
> + pipe_mode->crtc_clock /= 2;
> + pipe_mode->crtc_hdisplay /= 2;
> + pipe_mode->crtc_hblank_start /= 2;
> + pipe_mode->crtc_hblank_end /= 2;
> + pipe_mode->crtc_hsync_start /= 2;
> + pipe_mode->crtc_hsync_end /= 2;
> + pipe_mode->crtc_htotal /= 2;
> + pipe_mode->crtc_hskew /= 2;
> + pipe_config->pipe_src_w /= 2;
> + }
> +
> if (INTEL_GEN(dev_priv) < 4) {
> clock_limit = dev_priv->max_cdclk_freq * 9 / 10;
>
> @@ -8300,7 +8315,7 @@ static int intel_crtc_compute_config(struct intel_crtc
> *crtc,
> * WaPruneModeWithIncorrectHsyncOffset:ctg,elk,ilk,snb,ivb,vlv,hsw.
> */
> if ((INTEL_GEN(dev_priv) > 4 || IS_G4X(dev_priv)) &&
> - pipe_mode->crtc_hsync_start == pipe_mode->crtc_hdisplay)
> + pipe_mode->crtc_hsync_start == pipe_mode->crtc_hdisplay)
> return -EINVAL;
>
> intel_crtc_compute_pixel_rate(pipe_config);
> @@ -12657,7 +12672,7 @@ static bool encoders_cloneable(const struct
> intel_encoder *a,
> b->cloneable & (1 << a->type));
> }
>
> -static bool check_single_encoder_cloning(struct drm_atomic_state *state,
> +static bool check_single_encoder_cloning(struct intel_atomic_state *state,
> struct intel_crtc *crtc,
> struct intel_encoder *encoder)
> {
> @@ -12666,7 +12681,7 @@ static bool check_single_encoder_cloning(struct
> drm_atomic_state *state,
> struct drm_connector_state *connector_state;
> int i;
>
> - for_each_new_connector_in_state(state, connector, connector_state, i) {
> + for_each_new_connector_in_state(&state->base, connector,
> connector_state, i) {
There's still this extra noise in the patch. I thought you were going
to split out the calling convention changes to reduce it?
> if (connector_state->crtc != &crtc->base)
> continue;
>
> @@ -12906,6 +12921,7 @@ static int intel_crtc_atomic_check(struct
> intel_atomic_state *state,
>
> if (mode_changed && crtc_state->hw.enable &&
> dev_priv->display.crtc_compute_clock &&
> + !crtc_state->bigjoiner_slave &&
> !drm_WARN_ON(&dev_priv->drm, crtc_state->shared_dpll)) {
> ret = dev_priv->display.crtc_compute_clock(crtc, crtc_state);
> if (ret)
> @@ -13447,6 +13463,15 @@ intel_crtc_copy_uapi_to_hw_state_nomodeset(struct
> intel_atomic_state *state,
> {
> const struct intel_crtc_state *from_crtc_state = crtc_state;
>
> + if (crtc_state->bigjoiner_slave) {
> + from_crtc_state = intel_atomic_get_new_crtc_state(state,
> +
> crtc_state->bigjoiner_linked_crtc);
> +
> + /* No need to copy state if the master state is unchanged */
> + if (!from_crtc_state)
> + return;
> + }
> +
> intel_crtc_copy_color_blobs(crtc_state, from_crtc_state);
> }
>
> @@ -13482,6 +13507,47 @@ static void intel_crtc_copy_hw_to_uapi_state(struct
> intel_crtc_state *crtc_state
> crtc_state->hw.ctm);
> }
>
> +static int
> +copy_bigjoiner_crtc_state(struct intel_crtc_state *crtc_state,
> + const struct intel_crtc_state *from_crtc_state)
> +{
> + struct intel_crtc_state *saved_state;
> + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
> +
> + saved_state = kmemdup(from_crtc_state, sizeof(*saved_state),
> GFP_KERNEL);
> + if (!saved_state)
> + return -ENOMEM;
> +
> + saved_state->uapi = crtc_state->uapi;
> + saved_state->scaler_state = crtc_state->scaler_state;
> + saved_state->shared_dpll = crtc_state->shared_dpll;
> + saved_state->dpll_hw_state = crtc_state->dpll_hw_state;
> + saved_state->crc_enabled = crtc_state->crc_enabled;
> +
> + intel_crtc_free_hw_state(crtc_state);
> + memcpy(crtc_state, saved_state, sizeof(*crtc_state));
> + kfree(saved_state);
> +
> + /* Re-init hw state */
> + memset(&crtc_state->hw, 0, sizeof(saved_state->hw));
> + crtc_state->hw.enable = from_crtc_state->hw.enable;
> + crtc_state->hw.active = from_crtc_state->hw.active;
> + crtc_state->hw.pipe_mode = from_crtc_state->hw.pipe_mode;
> + crtc_state->hw.adjusted_mode = from_crtc_state->hw.adjusted_mode;
> +
> + /* Some fixups */
> + crtc_state->uapi.mode_changed = from_crtc_state->uapi.mode_changed;
> + crtc_state->uapi.connectors_changed =
> from_crtc_state->uapi.connectors_changed;
> + crtc_state->uapi.active_changed = from_crtc_state->uapi.active_changed;
> + crtc_state->nv12_planes = crtc_state->c8_planes =
> crtc_state->update_planes = 0;
> + crtc_state->bigjoiner_linked_crtc =
> to_intel_crtc(from_crtc_state->uapi.crtc);
> + crtc_state->bigjoiner_slave = true;
> + crtc_state->cpu_transcoder = (enum transcoder)crtc->pipe;
> + crtc_state->has_audio = false;
> +
> + return 0;
> +}
> +
> static int
> intel_crtc_prepare_cleared_state(struct intel_atomic_state *state,
> struct intel_crtc_state *crtc_state)
> @@ -13522,10 +13588,10 @@ intel_crtc_prepare_cleared_state(struct
> intel_atomic_state *state,
> }
>
> static int
> -intel_modeset_pipe_config(struct intel_crtc_state *pipe_config)
> +intel_modeset_pipe_config(struct intel_atomic_state *state,
> + struct intel_crtc_state *pipe_config)
> {
> struct drm_crtc *crtc = pipe_config->uapi.crtc;
> - struct drm_atomic_state *state = pipe_config->uapi.state;
> struct drm_i915_private *i915 = to_i915(pipe_config->uapi.crtc->dev);
> struct drm_connector *connector;
> struct drm_connector_state *connector_state;
> @@ -13567,7 +13633,7 @@ intel_modeset_pipe_config(struct intel_crtc_state
> *pipe_config)
> &pipe_config->pipe_src_w,
> &pipe_config->pipe_src_h);
>
> - for_each_new_connector_in_state(state, connector, connector_state, i) {
> + for_each_new_connector_in_state(&state->base, connector,
> connector_state, i) {
> struct intel_encoder *encoder =
> to_intel_encoder(connector_state->best_encoder);
>
> @@ -13605,7 +13671,7 @@ intel_modeset_pipe_config(struct intel_crtc_state
> *pipe_config)
> * adjust it according to limitations or connector properties, and also
> * a chance to reject the mode entirely.
> */
> - for_each_new_connector_in_state(state, connector, connector_state, i) {
> + for_each_new_connector_in_state(&state->base, connector,
> connector_state, i) {
> struct intel_encoder *encoder =
> to_intel_encoder(connector_state->best_encoder);
>
> @@ -13657,9 +13723,6 @@ intel_modeset_pipe_config(struct intel_crtc_state
> *pipe_config)
> "hw max bpp: %i, pipe bpp: %i, dithering: %i\n",
> base_bpp, pipe_config->pipe_bpp, pipe_config->dither);
>
> - /* without bigjoiner, pipe_mode == adjusted_mode */
> - pipe_config->hw.pipe_mode = pipe_config->hw.adjusted_mode;
> -
> return 0;
> }
>
> @@ -15055,6 +15118,75 @@ static bool
> intel_cpu_transcoders_need_modeset(struct intel_atomic_state *state,
> return false;
> }
>
> +static int intel_atomic_check_bigjoiner(struct intel_atomic_state *state,
> + struct intel_crtc *crtc,
> + struct intel_crtc_state *old_crtc_state,
> + struct intel_crtc_state *new_crtc_state)
> +{
> + struct drm_i915_private *dev_priv = to_i915(state->base.dev);
> + struct intel_crtc_state *slave_crtc_state, *master_crtc_state;
> + struct intel_crtc *slave, *master;
> +
> + /* slave being enabled, is master is still claiming this crtc? */
> + if (old_crtc_state->bigjoiner_slave) {
> + slave = crtc;
> + master = old_crtc_state->bigjoiner_linked_crtc;
> + master_crtc_state = intel_atomic_get_new_crtc_state(state,
> master);
> + if (!master_crtc_state || !needs_modeset(master_crtc_state))
> + goto claimed;
> + }
> +
> + if (!new_crtc_state->bigjoiner)
> + return 0;
> +
> + if (1 + crtc->pipe >= INTEL_NUM_PIPES(dev_priv)) {
> + DRM_DEBUG_KMS("[CRTC:%d:%s] Big joiner configuration requires "
> + "CRTC + 1 to be used, doesn't exist\n",
> + crtc->base.base.id, crtc->base.name);
> + return -EINVAL;
> + }
> +
> + slave = new_crtc_state->bigjoiner_linked_crtc =
> + intel_get_crtc_for_pipe(dev_priv, crtc->pipe + 1);
> + slave_crtc_state = intel_atomic_get_crtc_state(&state->base, slave);
> + master = crtc;
> + if (IS_ERR(slave_crtc_state))
> + return PTR_ERR(slave_crtc_state);
> +
> + /* master being enabled, slave was already configured? */
> + if (slave_crtc_state->uapi.enable)
> + goto claimed;
> +
> + DRM_DEBUG_KMS("[CRTC:%d:%s] Used as slave for big joiner\n",
> + slave->base.base.id, slave->base.name);
> +
> + return copy_bigjoiner_crtc_state(slave_crtc_state, new_crtc_state);
> +
> +claimed:
> + DRM_DEBUG_KMS("[CRTC:%d:%s] Slave is enabled as normal CRTC, but "
> + "[CRTC:%d:%s] claiming this CRTC for bigjoiner.\n",
> + slave->base.base.id, slave->base.name,
> + master->base.base.id, master->base.name);
> + return -EINVAL;
> +}
> +
> +static int kill_bigjoiner_slave(struct intel_atomic_state *state,
> + struct intel_crtc_state *master_crtc_state)
> +{
> + struct intel_crtc_state *slave_crtc_state =
> + intel_atomic_get_crtc_state(&state->base,
> +
> master_crtc_state->bigjoiner_linked_crtc);
> +
> + if (IS_ERR(slave_crtc_state))
> + return PTR_ERR(slave_crtc_state);
> +
> + slave_crtc_state->bigjoiner = master_crtc_state->bigjoiner =
> false;
> + slave_crtc_state->bigjoiner_slave =
> master_crtc_state->bigjoiner_slave = false;
> + slave_crtc_state->bigjoiner_linked_crtc =
> master_crtc_state->bigjoiner_linked_crtc = NULL;
> + intel_crtc_copy_uapi_to_hw_state(state, slave_crtc_state);
> + return 0;
> +}
> +
> /**
> * DOC: asynchronous flip implementation
> *
> @@ -15222,14 +15354,31 @@ static int intel_atomic_check(struct drm_device
> *dev,
> continue;
> }
>
> + /* Kill old bigjoiner link, we may re-establish afterwards */
> + if (old_crtc_state->bigjoiner &&
> !old_crtc_state->bigjoiner_slave) {
> + ret = kill_bigjoiner_slave(state, new_crtc_state);
> + if (ret)
> + goto fail;
> + }
> +
> + if (!new_crtc_state->uapi.enable) {
> + if (!new_crtc_state->bigjoiner_slave) {
> + intel_crtc_copy_uapi_to_hw_state(state,
> new_crtc_state);
> + any_ms = true;
> + }
> + continue;
> + }
> +
> ret = intel_crtc_prepare_cleared_state(state, new_crtc_state);
> if (ret)
> goto fail;
>
> - if (!new_crtc_state->hw.enable)
> - continue;
> + ret = intel_modeset_pipe_config(state, new_crtc_state);
> + if (ret)
> + goto fail;
>
> - ret = intel_modeset_pipe_config(new_crtc_state);
> + ret = intel_atomic_check_bigjoiner(state, crtc, old_crtc_state,
> + new_crtc_state);
> if (ret)
> goto fail;
> }
> @@ -15567,7 +15716,9 @@ static void intel_update_crtc(struct
> intel_atomic_state *state,
>
> commit_pipe_config(state, crtc);
>
> - if (INTEL_GEN(dev_priv) >= 9)
> + if (new_crtc_state->bigjoiner) {
> + /* Not supported yet */
> + } else if (INTEL_GEN(dev_priv) >= 9)
> skl_update_planes_on_crtc(state, crtc);
> else
> i9xx_update_planes_on_crtc(state, crtc);
> diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h
> b/drivers/gpu/drm/i915/display/intel_display_types.h
> index b526afee595c..59ed94d68b55 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -1070,6 +1070,15 @@ struct intel_crtc_state {
> /* enable pipe csc? */
> bool csc_enable;
>
> + /* enable pipe big joiner? */
> + bool bigjoiner;
> +
> + /* big joiner slave crtc? */
> + bool bigjoiner_slave;
> +
> + /* linked crtc for bigjoiner, either slave or master */
> + struct intel_crtc *bigjoiner_linked_crtc;
> +
> /* Display Stream compression state */
> struct {
> bool compression_enable;
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
> b/drivers/gpu/drm/i915/display/intel_dp.c
> index d123e5a508c1..cb604899a881 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -2349,6 +2349,15 @@ static int intel_dp_dsc_compute_config(struct intel_dp
> *intel_dp,
> pipe_config->port_clock = intel_dp->common_rates[limits->max_clock];
> pipe_config->lane_count = limits->max_lane_count;
>
> + if (adjusted_mode->crtc_clock > intel_dp_max_dotclock(intel_dp, false))
> {
> + if (adjusted_mode->crtc_clock > intel_dp_max_dotclock(intel_dp,
> true)) {
> + DRM_DEBUG_KMS("Clock rate too high for big joiner\n");
> + return -EINVAL;
> + }
That second check is redundant I think. intel_crtc_compute_config()
already takes care of it.
So seems like we should be good with just something super simple like:
if (crtc_clock > dev_priv->max_dotclock && can_bigjoiner())
bigjoiner = true;
> + pipe_config->bigjoiner = true;
> + DRM_DEBUG_KMS("Using bigjoiner configuration\n");
> + }
> +
> if (intel_dp_is_edp(intel_dp)) {
> pipe_config->dsc.compressed_bpp =
> min_t(u16,
> drm_edp_dsc_sink_output_bpp(intel_dp->dsc_dpcd) >> 4,
> @@ -2366,12 +2375,12 @@ static int intel_dp_dsc_compute_config(struct
> intel_dp *intel_dp,
> pipe_config->lane_count,
> adjusted_mode->crtc_clock,
>
> adjusted_mode->crtc_hdisplay,
> - false);
> + pipe_config->bigjoiner);
> dsc_dp_slice_count =
> intel_dp_dsc_get_slice_count(intel_dp,
> adjusted_mode->crtc_clock,
>
> adjusted_mode->crtc_hdisplay,
> - false);
> + pipe_config->bigjoiner);
> if (!dsc_max_output_bpp || !dsc_dp_slice_count) {
> drm_dbg_kms(&dev_priv->drm,
> "Compressed BPP/Slice Count not
> supported\n");
> @@ -2387,14 +2396,15 @@ static int intel_dp_dsc_compute_config(struct
> intel_dp *intel_dp,
> * is greater than the maximum Cdclock and if slice count is even
> * then we need to use 2 VDSC instances.
> */
> - if (adjusted_mode->crtc_clock > dev_priv->max_cdclk_freq) {
> - if (pipe_config->dsc.slice_count > 1) {
> - pipe_config->dsc.dsc_split = true;
> - } else {
> + if (adjusted_mode->crtc_clock > dev_priv->max_cdclk_freq ||
> + pipe_config->bigjoiner) {
> + if (pipe_config->dsc.slice_count < 2) {
> drm_dbg_kms(&dev_priv->drm,
> "Cannot split stream to use 2 VDSC
> instances\n");
> return -EINVAL;
> }
> +
> + pipe_config->dsc.dsc_split = true;
> }
>
> ret = intel_dp_dsc_compute_params(&dig_port->base, pipe_config);
> --
> 2.19.1
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Ville Syrjälä
Intel
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