From 24f2845056892b297fa95edbddceefd38acc0e62 Mon Sep 17 00:00:00 2001 From: Maarten Lankhorst Date: Wed, 22 Nov 2017 19:39:01 +0100 Subject: [PATCH] drm/i915: Make ips_enabled a property depending on whether IPS is enabled, v3. Mime-version: 1.0 Content-type: text/plain; charset=UTF-8 Content-transfer-encoding: 8bit Git-commit: 24f2845056892b297fa95edbddceefd38acc0e62 Patch-mainline: v4.16-rc1 References: FATE#322643 bsc#1055900 ips_enabled was used as a variable of whether IPS can be enabled or not, but should be used to test whether IPS is actually enabled. Changes since v1: - Call needs_modeset on new crtc state. (Ville) - IPS can be enabled with sprite plane enabled too. (Ville) - Fix CDCLK vs IPS workaround. (Ville) Changes since v2: - Only re-enable fastset when inheriting mode. (Ville) - Put the conditions for enabling and disabling IPS in a helper. Changes since v3: - Keep the max_cdclk workaround working. (Ville) - Also check logical cdclk out of paranoia. - Remove planes check from IPS disable function for initial disable. - Remove assert_plane_enabled/disabled checks and use crtc_state->active_planes for hsw_enable_ips only, always allow calling hsw_disable_ips to disable it initially in hw. Signed-off-by: Maarten Lankhorst Link: https://patchwork.freedesktop.org/patch/msgid/20171122183901.47720-1-maarten.lankhorst@linux.intel.com [mlankhorst: pipe_config -> crtc_state (Ville)] Reviewed-by: Ville Syrjälä Acked-by: Takashi Iwai --- drivers/gpu/drm/i915/intel_cdclk.c | 2 drivers/gpu/drm/i915/intel_display.c | 168 +++++++++++++++++++++------------- drivers/gpu/drm/i915/intel_drv.h | 1 drivers/gpu/drm/i915/intel_pipe_crc.c | 2 4 files changed, 109 insertions(+), 64 deletions(-) --- a/drivers/gpu/drm/i915/intel_cdclk.c +++ b/drivers/gpu/drm/i915/intel_cdclk.c @@ -1913,7 +1913,7 @@ int intel_crtc_compute_min_cdclk(const s min_cdclk = intel_pixel_rate_to_cdclk(dev_priv, crtc_state->pixel_rate); /* pixel rate mustn't exceed 95% of cdclk with IPS on BDW */ - if (IS_BROADWELL(dev_priv) && crtc_state->ips_enabled) + if (IS_BROADWELL(dev_priv) && hsw_crtc_state_ips_capable(crtc_state)) min_cdclk = DIV_ROUND_UP(min_cdclk * 100, 95); /* BSpec says "Do not use DisplayPort with CDCLK less than 432 MHz, --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -489,7 +489,7 @@ static const struct intel_limit intel_li }; static bool -needs_modeset(struct drm_crtc_state *state) +needs_modeset(const struct drm_crtc_state *state) { return drm_atomic_crtc_needs_modeset(state); } @@ -4851,7 +4851,7 @@ void hsw_enable_ips(const struct intel_c struct drm_device *dev = crtc->base.dev; struct drm_i915_private *dev_priv = to_i915(dev); - if (!crtc->config->ips_enabled) + if (!crtc_state->ips_enabled) return; /* @@ -4859,8 +4859,7 @@ void hsw_enable_ips(const struct intel_c * This function is called from post_plane_update, which is run after * a vblank wait. */ - - assert_plane_enabled(to_intel_plane(crtc->base.primary)); + WARN_ON(!(crtc_state->active_planes & ~BIT(PLANE_CURSOR))); if (IS_BROADWELL(dev_priv)) { mutex_lock(&dev_priv->pcu_lock); @@ -4895,8 +4894,6 @@ void hsw_disable_ips(const struct intel_ if (!crtc_state->ips_enabled) return; - assert_plane_enabled(to_intel_plane(crtc->base.primary)); - if (IS_BROADWELL(dev_priv)) { mutex_lock(&dev_priv->pcu_lock); WARN_ON(sandybridge_pcode_write(dev_priv, DISPLAY_IPS_CONTROL, 0)); @@ -4950,14 +4947,6 @@ intel_post_enable_primary(struct drm_crt int pipe = intel_crtc->pipe; /* - * FIXME IPS should be fine as long as one plane is - * enabled, but in practice it seems to have problems - * when going from primary only to sprite only and vice - * versa. - */ - hsw_enable_ips(new_crtc_state); - - /* * Gen2 reports pipe underruns whenever all planes are disabled. * So don't enable underrun reporting before at least some planes * are enabled. @@ -4972,10 +4961,9 @@ intel_post_enable_primary(struct drm_crt intel_check_pch_fifo_underruns(dev_priv); } -/* FIXME move all this to pre_plane_update() with proper state tracking */ +/* FIXME get rid of this and use pre_plane_update */ static void -intel_pre_disable_primary(struct drm_crtc *crtc, - const struct intel_crtc_state *old_crtc_state) +intel_pre_disable_primary_noatomic(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; struct drm_i915_private *dev_priv = to_i915(dev); @@ -4984,32 +4972,12 @@ intel_pre_disable_primary(struct drm_crt /* * Gen2 reports pipe underruns whenever all planes are disabled. - * So diasble underrun reporting before all the planes get disabled. - * FIXME: Need to fix the logic to work when we turn off all planes - * but leave the pipe running. + * So disable underrun reporting before all the planes get disabled. */ if (IS_GEN2(dev_priv)) intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, false); - /* - * FIXME IPS should be fine as long as one plane is - * enabled, but in practice it seems to have problems - * when going from primary only to sprite only and vice - * versa. - */ - hsw_disable_ips(old_crtc_state); -} - -/* FIXME get rid of this and use pre_plane_update */ -static void -intel_pre_disable_primary_noatomic(struct drm_crtc *crtc) -{ - struct drm_device *dev = crtc->dev; - struct drm_i915_private *dev_priv = to_i915(dev); - struct intel_crtc *intel_crtc = to_intel_crtc(crtc); - int pipe = intel_crtc->pipe; - - intel_pre_disable_primary(crtc, to_intel_crtc_state(crtc->state)); + hsw_disable_ips(to_intel_crtc_state(crtc->state)); /* * Vblank time updates from the shadow to live plane control register @@ -5025,6 +4993,38 @@ intel_pre_disable_primary_noatomic(struc intel_wait_for_vblank(dev_priv, pipe); } +static bool hsw_pre_update_disable_ips(const struct intel_crtc_state *old_crtc_state, + const struct intel_crtc_state *new_crtc_state) +{ + if (!old_crtc_state->ips_enabled) + return false; + + if (needs_modeset(&new_crtc_state->base)) + return true; + + return !new_crtc_state->ips_enabled; +} + +static bool hsw_post_update_enable_ips(const struct intel_crtc_state *old_crtc_state, + const struct intel_crtc_state *new_crtc_state) +{ + if (!new_crtc_state->ips_enabled) + return false; + + if (needs_modeset(&new_crtc_state->base)) + return true; + + /* + * We can't read out IPS on broadwell, assume the worst and + * forcibly enable IPS on the first fastset. + */ + if (new_crtc_state->update_pipe && + old_crtc_state->base.adjusted_mode.private_flags & I915_MODE_FLAG_INHERITED) + return true; + + return !old_crtc_state->ips_enabled; +} + static void intel_post_plane_update(struct intel_crtc_state *old_crtc_state) { struct intel_crtc *crtc = to_intel_crtc(old_crtc_state->base.crtc); @@ -5041,6 +5041,9 @@ static void intel_post_plane_update(stru if (pipe_config->update_wm_post && pipe_config->base.active) intel_update_watermarks(crtc); + if (hsw_post_update_enable_ips(old_crtc_state, pipe_config)) + hsw_enable_ips(pipe_config); + if (old_pri_state) { struct intel_plane_state *primary_state = intel_atomic_get_new_plane_state(to_intel_atomic_state(old_state), @@ -5071,6 +5074,9 @@ static void intel_pre_plane_update(struc struct intel_atomic_state *old_intel_state = to_intel_atomic_state(old_state); + if (hsw_pre_update_disable_ips(old_crtc_state, pipe_config)) + hsw_disable_ips(old_crtc_state); + if (old_pri_state) { struct intel_plane_state *primary_state = intel_atomic_get_new_plane_state(old_intel_state, @@ -5079,10 +5085,13 @@ static void intel_pre_plane_update(struc to_intel_plane_state(old_pri_state); intel_fbc_pre_update(crtc, pipe_config, primary_state); - - if (old_primary_state->base.visible && + /* + * Gen2 reports pipe underruns whenever all planes are disabled. + * So disable underrun reporting before all the planes get disabled. + */ + if (IS_GEN2(dev_priv) && old_primary_state->base.visible && (modeset || !primary_state->base.visible)) - intel_pre_disable_primary(&crtc->base, old_crtc_state); + intel_set_cpu_fifo_underrun_reporting(dev_priv, crtc->pipe, false); } /* @@ -6213,18 +6222,20 @@ retry: return ret; } -static bool pipe_config_supports_ips(struct drm_i915_private *dev_priv, - struct intel_crtc_state *pipe_config) +bool hsw_crtc_state_ips_capable(const struct intel_crtc_state *crtc_state) { - if (pipe_config->ips_force_disable) + struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc); + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + + /* IPS only exists on ULT machines and is tied to pipe A. */ + if (!hsw_crtc_supports_ips(crtc)) return false; - if (pipe_config->pipe_bpp > 24) + if (!i915_modparams.enable_ips) return false; - /* HSW can handle pixel rate up to cdclk? */ - if (IS_HASWELL(dev_priv)) - return true; + if (crtc_state->pipe_bpp > 24) + return false; /* * We compare against max which means we must take @@ -6233,19 +6244,41 @@ static bool pipe_config_supports_ips(str * * Should measure whether using a lower cdclk w/o IPS */ - return pipe_config->pixel_rate <= - dev_priv->max_cdclk_freq * 95 / 100; + if (IS_BROADWELL(dev_priv) && + crtc_state->pixel_rate > dev_priv->max_cdclk_freq * 95 / 100) + return false; + + return true; } -static void hsw_compute_ips_config(struct intel_crtc *crtc, - struct intel_crtc_state *pipe_config) +static bool hsw_compute_ips_config(struct intel_crtc_state *crtc_state) { - struct drm_device *dev = crtc->base.dev; - struct drm_i915_private *dev_priv = to_i915(dev); + struct drm_i915_private *dev_priv = + to_i915(crtc_state->base.crtc->dev); + struct intel_atomic_state *intel_state = + to_intel_atomic_state(crtc_state->base.state); + + if (!hsw_crtc_state_ips_capable(crtc_state)) + return false; + + if (crtc_state->ips_force_disable) + return false; + + /* + * FIXME IPS should be fine as long as one plane is + * enabled, but in practice it seems to have problems + * when going from primary only to sprite only and vice + * versa. + */ + if (!(crtc_state->active_planes & BIT(PLANE_PRIMARY))) + return false; - pipe_config->ips_enabled = i915_modparams.enable_ips && - hsw_crtc_supports_ips(crtc) && - pipe_config_supports_ips(dev_priv, pipe_config); + /* pixel rate mustn't exceed 95% of cdclk with IPS on BDW */ + if (IS_BROADWELL(dev_priv) && + crtc_state->pixel_rate > intel_state->cdclk.logical.cdclk * 95 / 100) + return false; + + return true; } static bool intel_crtc_supports_double_wide(const struct intel_crtc *crtc) @@ -6363,9 +6396,6 @@ static int intel_crtc_compute_config(str intel_crtc_compute_pixel_rate(pipe_config); - if (HAS_IPS(dev_priv)) - hsw_compute_ips_config(crtc, pipe_config); - if (pipe_config->has_pch_encoder) return ironlake_fdi_compute_config(crtc, pipe_config); @@ -9201,6 +9231,19 @@ static bool haswell_get_pipe_config(stru ironlake_get_pfit_config(crtc, pipe_config); } + if (hsw_crtc_supports_ips(crtc)) { + if (IS_HASWELL(dev_priv)) + pipe_config->ips_enabled = I915_READ(IPS_CTL) & IPS_ENABLE; + else { + /* + * We cannot readout IPS state on broadwell, set to + * true so we can set it to a defined state on first + * commit. + */ + pipe_config->ips_enabled = true; + } + } + if (pipe_config->cpu_transcoder != TRANSCODER_EDP && !transcoder_is_dsi(pipe_config->cpu_transcoder)) { pipe_config->pixel_multiplier = @@ -10453,6 +10496,9 @@ static int intel_crtc_atomic_check(struc pipe_config); } + if (HAS_IPS(dev_priv)) + pipe_config->ips_enabled = hsw_compute_ips_config(pipe_config); + return ret; } --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -1488,6 +1488,7 @@ bool bxt_find_best_dpll(struct intel_crt int chv_calc_dpll_params(int refclk, struct dpll *pll_clock); bool intel_crtc_active(struct intel_crtc *crtc); +bool hsw_crtc_state_ips_capable(const struct intel_crtc_state *crtc_state); void hsw_enable_ips(const struct intel_crtc_state *crtc_state); void hsw_disable_ips(const struct intel_crtc_state *crtc_state); enum intel_display_power_domain intel_port_to_power_domain(enum port port); --- a/drivers/gpu/drm/i915/intel_pipe_crc.c +++ b/drivers/gpu/drm/i915/intel_pipe_crc.c @@ -541,8 +541,6 @@ retry: * completely disable it. */ pipe_config->ips_force_disable = enable; - if (pipe_config->ips_enabled == enable) - pipe_config->base.connectors_changed = true; } if (IS_HASWELL(dev_priv)) {