From ccf010fb943a649a3ca74bb5cd489a642afaa7ae Mon Sep 17 00:00:00 2001 From: Maarten Lankhorst Date: Tue, 8 Nov 2016 13:55:32 +0100 Subject: [PATCH] drm/i915: Add an atomic evasion step to watermark programming, v4. Allow the driver to write watermarks during atomic evasion. This will make it possible to write the watermarks in a cleaner way on gen9+. intel_atomic_state is not used here yet, but will be used when we program all watermarks as a separate step during evasion. This also writes linetime all the time, while before it was only done during plane updates. This looks like this could be a bugfix, but I'm not sure what it affects. Changes since v1: - Add comment about atomic evasion to commit message. - Unwrap I915_WRITE call. (Lyude) Changes since v2: - Rename atomic_evade_watermarks to atomic_update_watermarks. (Ville) - Add line wraps where appropriate, fix grammar in commit message. (Matt) Changes since v3: - Actually fix commit message. (Matt) - Line wrap calls to watermark update functions. (Matt) Signed-off-by: Maarten Lankhorst Reviewed-by: Matt Roper Cc: Paulo Zanoni Link: http://patchwork.freedesktop.org/patch/msgid/1478609742-13603-2-git-send-email-maarten.lankhorst@linux.intel.com --- drivers/gpu/drm/i915/i915_drv.h | 9 ++++-- drivers/gpu/drm/i915/intel_display.c | 41 ++++++++++++++++++---------- drivers/gpu/drm/i915/intel_pm.c | 18 ++++++++++-- 3 files changed, 50 insertions(+), 18 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 6bc13bde337e..194f0fda3a9f 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -474,6 +474,7 @@ struct sdvo_device_mapping { struct intel_connector; struct intel_encoder; +struct intel_atomic_state; struct intel_crtc_state; struct intel_initial_plane_config; struct intel_crtc; @@ -487,8 +488,12 @@ struct drm_i915_display_funcs { int (*compute_intermediate_wm)(struct drm_device *dev, struct intel_crtc *intel_crtc, struct intel_crtc_state *newstate); - void (*initial_watermarks)(struct intel_crtc_state *cstate); - void (*optimize_watermarks)(struct intel_crtc_state *cstate); + void (*initial_watermarks)(struct intel_atomic_state *state, + struct intel_crtc_state *cstate); + void (*atomic_update_watermarks)(struct intel_atomic_state *state, + struct intel_crtc_state *cstate); + void (*optimize_watermarks)(struct intel_atomic_state *state, + struct intel_crtc_state *cstate); int (*compute_global_watermarks)(struct drm_atomic_state *state); void (*update_wm)(struct intel_crtc *crtc); int (*modeset_calc_cdclk)(struct drm_atomic_state *state); diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index ba184f0bb2c2..218d1f461d9b 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -5111,6 +5111,8 @@ static void intel_pre_plane_update(struct intel_crtc_state *old_crtc_state) struct drm_plane_state *old_pri_state = drm_atomic_get_existing_plane_state(old_state, primary); bool modeset = needs_modeset(&pipe_config->base); + struct intel_atomic_state *old_intel_state = + to_intel_atomic_state(old_state); if (old_pri_state) { struct intel_plane_state *primary_state = @@ -5178,7 +5180,8 @@ static void intel_pre_plane_update(struct intel_crtc_state *old_crtc_state) * us to. */ if (dev_priv->display.initial_watermarks != NULL) - dev_priv->display.initial_watermarks(pipe_config); + dev_priv->display.initial_watermarks(old_intel_state, + pipe_config); else if (pipe_config->update_wm_pre) intel_update_watermarks(crtc); } @@ -5334,6 +5337,8 @@ static void ironlake_crtc_enable(struct intel_crtc_state *pipe_config, struct drm_i915_private *dev_priv = to_i915(dev); struct intel_crtc *intel_crtc = to_intel_crtc(crtc); int pipe = intel_crtc->pipe; + struct intel_atomic_state *old_intel_state = + to_intel_atomic_state(old_state); if (WARN_ON(intel_crtc->active)) return; @@ -5392,7 +5397,7 @@ static void ironlake_crtc_enable(struct intel_crtc_state *pipe_config, intel_color_load_luts(&pipe_config->base); if (dev_priv->display.initial_watermarks != NULL) - dev_priv->display.initial_watermarks(intel_crtc->config); + dev_priv->display.initial_watermarks(old_intel_state, intel_crtc->config); intel_enable_pipe(intel_crtc); if (intel_crtc->config->has_pch_encoder) @@ -5428,6 +5433,8 @@ static void haswell_crtc_enable(struct intel_crtc_state *pipe_config, struct intel_crtc *intel_crtc = to_intel_crtc(crtc); int pipe = intel_crtc->pipe, hsw_workaround_pipe; enum transcoder cpu_transcoder = intel_crtc->config->cpu_transcoder; + struct intel_atomic_state *old_intel_state = + to_intel_atomic_state(old_state); if (WARN_ON(intel_crtc->active)) return; @@ -5498,7 +5505,8 @@ static void haswell_crtc_enable(struct intel_crtc_state *pipe_config, intel_ddi_enable_transcoder_func(crtc); if (dev_priv->display.initial_watermarks != NULL) - dev_priv->display.initial_watermarks(pipe_config); + dev_priv->display.initial_watermarks(old_intel_state, + pipe_config); else intel_update_watermarks(intel_crtc); @@ -14484,7 +14492,8 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state) intel_cstate = to_intel_crtc_state(crtc->state); if (dev_priv->display.optimize_watermarks) - dev_priv->display.optimize_watermarks(intel_cstate); + dev_priv->display.optimize_watermarks(intel_state, + intel_cstate); } for_each_crtc_in_state(state, crtc, old_crtc_state, i) { @@ -14927,10 +14936,11 @@ static void intel_begin_crtc_commit(struct drm_crtc *crtc, struct intel_crtc *intel_crtc = to_intel_crtc(crtc); struct intel_crtc_state *intel_cstate = to_intel_crtc_state(crtc->state); - struct intel_crtc_state *old_intel_state = + struct intel_crtc_state *old_intel_cstate = to_intel_crtc_state(old_crtc_state); + struct intel_atomic_state *old_intel_state = + to_intel_atomic_state(old_crtc_state->state); bool modeset = needs_modeset(crtc->state); - enum pipe pipe = intel_crtc->pipe; /* Perform vblank evasion around commit operation */ intel_pipe_update_start(intel_crtc); @@ -14943,14 +14953,14 @@ static void intel_begin_crtc_commit(struct drm_crtc *crtc, intel_color_load_luts(crtc->state); } - if (intel_cstate->update_pipe) { - intel_update_pipe_config(intel_crtc, old_intel_state); - } else if (INTEL_GEN(dev_priv) >= 9) { + if (intel_cstate->update_pipe) + intel_update_pipe_config(intel_crtc, old_intel_cstate); + else if (INTEL_GEN(dev_priv) >= 9) skl_detach_scalers(intel_crtc); - I915_WRITE(PIPE_WM_LINETIME(pipe), - intel_cstate->wm.skl.optimal.linetime); - } + if (dev_priv->display.atomic_update_watermarks) + dev_priv->display.atomic_update_watermarks(old_intel_state, + intel_cstate); } static void intel_finish_crtc_commit(struct drm_crtc *crtc, @@ -16373,6 +16383,7 @@ static void sanitize_watermarks(struct drm_device *dev) { struct drm_i915_private *dev_priv = to_i915(dev); struct drm_atomic_state *state; + struct intel_atomic_state *intel_state; struct drm_crtc *crtc; struct drm_crtc_state *cstate; struct drm_modeset_acquire_ctx ctx; @@ -16401,12 +16412,14 @@ retry: if (WARN_ON(IS_ERR(state))) goto fail; + intel_state = to_intel_atomic_state(state); + /* * Hardware readout is the only time we don't want to calculate * intermediate watermarks (since we don't trust the current * watermarks). */ - to_intel_atomic_state(state)->skip_intermediate_wm = true; + intel_state->skip_intermediate_wm = true; ret = intel_atomic_check(dev, state); if (ret) { @@ -16430,7 +16443,7 @@ retry: struct intel_crtc_state *cs = to_intel_crtc_state(cstate); cs->wm.need_postvbl_update = true; - dev_priv->display.optimize_watermarks(cs); + dev_priv->display.optimize_watermarks(intel_state, cs); } put_state: diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index f1ef9559014c..7a5812eec8ed 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4196,6 +4196,17 @@ skl_compute_wm(struct drm_atomic_state *state) return 0; } +static void skl_atomic_update_crtc_wm(struct intel_atomic_state *state, + struct intel_crtc_state *cstate) +{ + struct intel_crtc *crtc = to_intel_crtc(cstate->base.crtc); + struct drm_i915_private *dev_priv = to_i915(state->base.dev); + struct skl_pipe_wm *pipe_wm = &cstate->wm.skl.optimal; + enum pipe pipe = crtc->pipe; + + I915_WRITE(PIPE_WM_LINETIME(pipe), pipe_wm->linetime); +} + static void skl_update_wm(struct intel_crtc *intel_crtc) { struct drm_device *dev = intel_crtc->base.dev; @@ -4286,7 +4297,8 @@ static void ilk_program_watermarks(struct drm_i915_private *dev_priv) ilk_write_wm_values(dev_priv, &results); } -static void ilk_initial_watermarks(struct intel_crtc_state *cstate) +static void ilk_initial_watermarks(struct intel_atomic_state *state, + struct intel_crtc_state *cstate) { struct drm_i915_private *dev_priv = to_i915(cstate->base.crtc->dev); struct intel_crtc *intel_crtc = to_intel_crtc(cstate->base.crtc); @@ -4297,7 +4309,8 @@ static void ilk_initial_watermarks(struct intel_crtc_state *cstate) mutex_unlock(&dev_priv->wm.wm_mutex); } -static void ilk_optimize_watermarks(struct intel_crtc_state *cstate) +static void ilk_optimize_watermarks(struct intel_atomic_state *state, + struct intel_crtc_state *cstate) { struct drm_i915_private *dev_priv = to_i915(cstate->base.crtc->dev); struct intel_crtc *intel_crtc = to_intel_crtc(cstate->base.crtc); @@ -7694,6 +7707,7 @@ void intel_init_pm(struct drm_i915_private *dev_priv) if (INTEL_GEN(dev_priv) >= 9) { skl_setup_wm_latency(dev_priv); dev_priv->display.update_wm = skl_update_wm; + dev_priv->display.atomic_update_watermarks = skl_atomic_update_crtc_wm; dev_priv->display.compute_global_watermarks = skl_compute_wm; } else if (HAS_PCH_SPLIT(dev_priv)) { ilk_setup_wm_latency(dev_priv); -- 2.20.1