From 0bc12bcb1b9686d7011f16410ba17ed0740167c3 Mon Sep 17 00:00:00 2001 From: Rodrigo Vivi Date: Fri, 14 Nov 2014 08:52:28 -0800 Subject: [PATCH] drm/i915: Introduce intel_psr.c No functional changes. Just cleaning and reorganizing it. v2: Rebase it puting it to begin of psr rework. This helps to blame easily at least latest changes. Signed-off-by: Rodrigo Vivi Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/Makefile | 1 + drivers/gpu/drm/i915/intel_ddi.c | 4 +- drivers/gpu/drm/i915/intel_display.c | 2 +- drivers/gpu/drm/i915/intel_dp.c | 381 +-------------------- drivers/gpu/drm/i915/intel_drv.h | 21 +- drivers/gpu/drm/i915/intel_frontbuffer.c | 4 +- drivers/gpu/drm/i915/intel_psr.c | 408 +++++++++++++++++++++++ 7 files changed, 428 insertions(+), 393 deletions(-) create mode 100644 drivers/gpu/drm/i915/intel_psr.c diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index 891e584e97ea..e4083e41a600 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -51,6 +51,7 @@ i915-y += intel_audio.o \ intel_frontbuffer.o \ intel_modes.o \ intel_overlay.o \ + intel_psr.o \ intel_sideband.o \ intel_sprite.o i915-$(CONFIG_ACPI) += intel_acpi.o intel_opregion.o diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index ca33ee9477f1..3e4c63cfa415 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -1583,7 +1583,7 @@ static void intel_enable_ddi(struct intel_encoder *intel_encoder) intel_dp_stop_link_train(intel_dp); intel_edp_backlight_on(intel_dp); - intel_edp_psr_enable(intel_dp); + intel_psr_enable(intel_dp); } if (intel_crtc->config.has_audio) { @@ -1609,7 +1609,7 @@ static void intel_disable_ddi(struct intel_encoder *intel_encoder) if (type == INTEL_OUTPUT_EDP) { struct intel_dp *intel_dp = enc_to_intel_dp(encoder); - intel_edp_psr_disable(intel_dp); + intel_psr_disable(intel_dp); intel_edp_backlight_off(intel_dp); } } diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 7d58a64195d6..2632f2adc319 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -12449,7 +12449,7 @@ static void intel_setup_outputs(struct drm_device *dev) if (SUPPORTS_TV(dev)) intel_tv_init(dev); - intel_edp_psr_init(dev); + intel_psr_init(dev); for_each_intel_encoder(dev, encoder) { encoder->base.possible_crtcs = encoder->crtc_mask; diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index a89585d809be..7369e6f10117 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -2066,385 +2066,6 @@ static void intel_dp_get_config(struct intel_encoder *encoder, } } -static bool is_edp_psr(struct intel_dp *intel_dp) -{ - return intel_dp->psr_dpcd[0] & DP_PSR_IS_SUPPORTED; -} - -static bool intel_edp_is_psr_enabled(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - if (!HAS_PSR(dev)) - return false; - - return I915_READ(EDP_PSR_CTL(dev)) & EDP_PSR_ENABLE; -} - -static void intel_edp_psr_write_vsc(struct intel_dp *intel_dp, - struct edp_vsc_psr *vsc_psr) -{ - struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); - struct drm_device *dev = dig_port->base.base.dev; - struct drm_i915_private *dev_priv = dev->dev_private; - struct intel_crtc *crtc = to_intel_crtc(dig_port->base.base.crtc); - u32 ctl_reg = HSW_TVIDEO_DIP_CTL(crtc->config.cpu_transcoder); - u32 data_reg = HSW_TVIDEO_DIP_VSC_DATA(crtc->config.cpu_transcoder); - uint32_t *data = (uint32_t *) vsc_psr; - unsigned int i; - - /* As per BSPec (Pipe Video Data Island Packet), we need to disable - the video DIP being updated before program video DIP data buffer - registers for DIP being updated. */ - I915_WRITE(ctl_reg, 0); - POSTING_READ(ctl_reg); - - for (i = 0; i < VIDEO_DIP_VSC_DATA_SIZE; i += 4) { - if (i < sizeof(struct edp_vsc_psr)) - I915_WRITE(data_reg + i, *data++); - else - I915_WRITE(data_reg + i, 0); - } - - I915_WRITE(ctl_reg, VIDEO_DIP_ENABLE_VSC_HSW); - POSTING_READ(ctl_reg); -} - -static void intel_edp_psr_setup_vsc(struct intel_dp *intel_dp) -{ - struct edp_vsc_psr psr_vsc; - - /* Prepare VSC packet as per EDP 1.3 spec, Table 3.10 */ - memset(&psr_vsc, 0, sizeof(psr_vsc)); - psr_vsc.sdp_header.HB0 = 0; - psr_vsc.sdp_header.HB1 = 0x7; - psr_vsc.sdp_header.HB2 = 0x2; - psr_vsc.sdp_header.HB3 = 0x8; - intel_edp_psr_write_vsc(intel_dp, &psr_vsc); -} - -static void intel_edp_psr_enable_sink(struct intel_dp *intel_dp) -{ - struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); - struct drm_device *dev = dig_port->base.base.dev; - struct drm_i915_private *dev_priv = dev->dev_private; - uint32_t aux_clock_divider; - int precharge = 0x3; - bool only_standby = false; - static const uint8_t aux_msg[] = { - [0] = DP_AUX_NATIVE_WRITE << 4, - [1] = DP_SET_POWER >> 8, - [2] = DP_SET_POWER & 0xff, - [3] = 1 - 1, - [4] = DP_SET_POWER_D0, - }; - int i; - - BUILD_BUG_ON(sizeof(aux_msg) > 20); - - aux_clock_divider = intel_dp->get_aux_clock_divider(intel_dp, 0); - - if (IS_BROADWELL(dev) && dig_port->port != PORT_A) - only_standby = true; - - /* Enable PSR in sink */ - if (intel_dp->psr_dpcd[1] & DP_PSR_NO_TRAIN_ON_EXIT || only_standby) - drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, - DP_PSR_ENABLE & ~DP_PSR_MAIN_LINK_ACTIVE); - else - drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, - DP_PSR_ENABLE | DP_PSR_MAIN_LINK_ACTIVE); - - /* Setup AUX registers */ - for (i = 0; i < sizeof(aux_msg); i += 4) - I915_WRITE(EDP_PSR_AUX_DATA1(dev) + i, - intel_dp_pack_aux(&aux_msg[i], sizeof(aux_msg) - i)); - - I915_WRITE(EDP_PSR_AUX_CTL(dev), - DP_AUX_CH_CTL_TIME_OUT_400us | - (sizeof(aux_msg) << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | - (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) | - (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT)); -} - -static void intel_edp_psr_enable_source(struct intel_dp *intel_dp) -{ - struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); - struct drm_device *dev = dig_port->base.base.dev; - struct drm_i915_private *dev_priv = dev->dev_private; - uint32_t max_sleep_time = 0x1f; - uint32_t idle_frames = 1; - uint32_t val = 0x0; - const uint32_t link_entry_time = EDP_PSR_MIN_LINK_ENTRY_TIME_8_LINES; - bool only_standby = false; - - if (IS_BROADWELL(dev) && dig_port->port != PORT_A) - only_standby = true; - - if (intel_dp->psr_dpcd[1] & DP_PSR_NO_TRAIN_ON_EXIT || only_standby) { - val |= EDP_PSR_LINK_STANDBY; - val |= EDP_PSR_TP2_TP3_TIME_0us; - val |= EDP_PSR_TP1_TIME_0us; - val |= EDP_PSR_SKIP_AUX_EXIT; - val |= IS_BROADWELL(dev) ? BDW_PSR_SINGLE_FRAME : 0; - } else - val |= EDP_PSR_LINK_DISABLE; - - I915_WRITE(EDP_PSR_CTL(dev), val | - (IS_BROADWELL(dev) ? 0 : link_entry_time) | - max_sleep_time << EDP_PSR_MAX_SLEEP_TIME_SHIFT | - idle_frames << EDP_PSR_IDLE_FRAME_SHIFT | - EDP_PSR_ENABLE); -} - -static bool intel_edp_psr_match_conditions(struct intel_dp *intel_dp) -{ - struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); - struct drm_device *dev = dig_port->base.base.dev; - struct drm_i915_private *dev_priv = dev->dev_private; - struct drm_crtc *crtc = dig_port->base.base.crtc; - struct intel_crtc *intel_crtc = to_intel_crtc(crtc); - - lockdep_assert_held(&dev_priv->psr.lock); - WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); - WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); - - dev_priv->psr.source_ok = false; - - if (IS_HASWELL(dev) && dig_port->port != PORT_A) { - DRM_DEBUG_KMS("HSW ties PSR to DDI A (eDP)\n"); - return false; - } - - if (!i915.enable_psr) { - DRM_DEBUG_KMS("PSR disable by flag\n"); - return false; - } - - /* Below limitations aren't valid for Broadwell */ - if (IS_BROADWELL(dev)) - goto out; - - if (I915_READ(HSW_STEREO_3D_CTL(intel_crtc->config.cpu_transcoder)) & - S3D_ENABLE) { - DRM_DEBUG_KMS("PSR condition failed: Stereo 3D is Enabled\n"); - return false; - } - - if (intel_crtc->config.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE) { - DRM_DEBUG_KMS("PSR condition failed: Interlaced is Enabled\n"); - return false; - } - - out: - dev_priv->psr.source_ok = true; - return true; -} - -static void intel_edp_psr_do_enable(struct intel_dp *intel_dp) -{ - struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); - struct drm_device *dev = intel_dig_port->base.base.dev; - struct drm_i915_private *dev_priv = dev->dev_private; - - WARN_ON(I915_READ(EDP_PSR_CTL(dev)) & EDP_PSR_ENABLE); - WARN_ON(dev_priv->psr.active); - lockdep_assert_held(&dev_priv->psr.lock); - - /* Enable/Re-enable PSR on the host */ - intel_edp_psr_enable_source(intel_dp); - - dev_priv->psr.active = true; -} - -void intel_edp_psr_enable(struct intel_dp *intel_dp) -{ - struct drm_device *dev = intel_dp_to_dev(intel_dp); - struct drm_i915_private *dev_priv = dev->dev_private; - - if (!HAS_PSR(dev)) { - DRM_DEBUG_KMS("PSR not supported on this platform\n"); - return; - } - - if (!is_edp_psr(intel_dp)) { - DRM_DEBUG_KMS("PSR not supported by this panel\n"); - return; - } - - mutex_lock(&dev_priv->psr.lock); - if (dev_priv->psr.enabled) { - DRM_DEBUG_KMS("PSR already in use\n"); - goto unlock; - } - - if (!intel_edp_psr_match_conditions(intel_dp)) - goto unlock; - - dev_priv->psr.busy_frontbuffer_bits = 0; - - intel_edp_psr_setup_vsc(intel_dp); - - /* Avoid continuous PSR exit by masking memup and hpd */ - I915_WRITE(EDP_PSR_DEBUG_CTL(dev), EDP_PSR_DEBUG_MASK_MEMUP | - EDP_PSR_DEBUG_MASK_HPD | EDP_PSR_DEBUG_MASK_LPSP); - - /* Enable PSR on the panel */ - intel_edp_psr_enable_sink(intel_dp); - - dev_priv->psr.enabled = intel_dp; -unlock: - mutex_unlock(&dev_priv->psr.lock); -} - -void intel_edp_psr_disable(struct intel_dp *intel_dp) -{ - struct drm_device *dev = intel_dp_to_dev(intel_dp); - struct drm_i915_private *dev_priv = dev->dev_private; - - mutex_lock(&dev_priv->psr.lock); - if (!dev_priv->psr.enabled) { - mutex_unlock(&dev_priv->psr.lock); - return; - } - - if (dev_priv->psr.active) { - I915_WRITE(EDP_PSR_CTL(dev), - I915_READ(EDP_PSR_CTL(dev)) & ~EDP_PSR_ENABLE); - - /* Wait till PSR is idle */ - if (_wait_for((I915_READ(EDP_PSR_STATUS_CTL(dev)) & - EDP_PSR_STATUS_STATE_MASK) == 0, 2000, 10)) - DRM_ERROR("Timed out waiting for PSR Idle State\n"); - - dev_priv->psr.active = false; - } else { - WARN_ON(I915_READ(EDP_PSR_CTL(dev)) & EDP_PSR_ENABLE); - } - - dev_priv->psr.enabled = NULL; - mutex_unlock(&dev_priv->psr.lock); - - cancel_delayed_work_sync(&dev_priv->psr.work); -} - -static void intel_edp_psr_work(struct work_struct *work) -{ - struct drm_i915_private *dev_priv = - container_of(work, typeof(*dev_priv), psr.work.work); - struct intel_dp *intel_dp = dev_priv->psr.enabled; - - /* We have to make sure PSR is ready for re-enable - * otherwise it keeps disabled until next full enable/disable cycle. - * PSR might take some time to get fully disabled - * and be ready for re-enable. - */ - if (wait_for((I915_READ(EDP_PSR_STATUS_CTL(dev_priv->dev)) & - EDP_PSR_STATUS_STATE_MASK) == 0, 50)) { - DRM_ERROR("Timed out waiting for PSR Idle for re-enable\n"); - return; - } - - mutex_lock(&dev_priv->psr.lock); - intel_dp = dev_priv->psr.enabled; - - if (!intel_dp) - goto unlock; - - /* - * The delayed work can race with an invalidate hence we need to - * recheck. Since psr_flush first clears this and then reschedules we - * won't ever miss a flush when bailing out here. - */ - if (dev_priv->psr.busy_frontbuffer_bits) - goto unlock; - - intel_edp_psr_do_enable(intel_dp); -unlock: - mutex_unlock(&dev_priv->psr.lock); -} - -static void intel_edp_psr_do_exit(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - if (dev_priv->psr.active) { - u32 val = I915_READ(EDP_PSR_CTL(dev)); - - WARN_ON(!(val & EDP_PSR_ENABLE)); - - I915_WRITE(EDP_PSR_CTL(dev), val & ~EDP_PSR_ENABLE); - - dev_priv->psr.active = false; - } - -} - -void intel_edp_psr_invalidate(struct drm_device *dev, - unsigned frontbuffer_bits) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - struct drm_crtc *crtc; - enum pipe pipe; - - mutex_lock(&dev_priv->psr.lock); - if (!dev_priv->psr.enabled) { - mutex_unlock(&dev_priv->psr.lock); - return; - } - - crtc = dp_to_dig_port(dev_priv->psr.enabled)->base.base.crtc; - pipe = to_intel_crtc(crtc)->pipe; - - intel_edp_psr_do_exit(dev); - - frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(pipe); - - dev_priv->psr.busy_frontbuffer_bits |= frontbuffer_bits; - mutex_unlock(&dev_priv->psr.lock); -} - -void intel_edp_psr_flush(struct drm_device *dev, - unsigned frontbuffer_bits) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - struct drm_crtc *crtc; - enum pipe pipe; - - mutex_lock(&dev_priv->psr.lock); - if (!dev_priv->psr.enabled) { - mutex_unlock(&dev_priv->psr.lock); - return; - } - - crtc = dp_to_dig_port(dev_priv->psr.enabled)->base.base.crtc; - pipe = to_intel_crtc(crtc)->pipe; - dev_priv->psr.busy_frontbuffer_bits &= ~frontbuffer_bits; - - /* - * On Haswell sprite plane updates don't result in a psr invalidating - * signal in the hardware. Which means we need to manually fake this in - * software for all flushes, not just when we've seen a preceding - * invalidation through frontbuffer rendering. - */ - if (IS_HASWELL(dev) && - (frontbuffer_bits & INTEL_FRONTBUFFER_SPRITE(pipe))) - intel_edp_psr_do_exit(dev); - - if (!dev_priv->psr.active && !dev_priv->psr.busy_frontbuffer_bits) - schedule_delayed_work(&dev_priv->psr.work, - msecs_to_jiffies(100)); - mutex_unlock(&dev_priv->psr.lock); -} - -void intel_edp_psr_init(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - INIT_DELAYED_WORK(&dev_priv->psr.work, intel_edp_psr_work); - mutex_init(&dev_priv->psr.lock); -} - static void intel_disable_dp(struct intel_encoder *encoder) { struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base); @@ -5095,7 +4716,7 @@ void intel_dp_set_drrs_state(struct drm_device *dev, int refresh_rate) * hard to tell without seeing the user of this function of this code. * Check locking and ordering once that lands. */ - if (INTEL_INFO(dev)->gen < 8 && intel_edp_is_psr_enabled(dev)) { + if (INTEL_INFO(dev)->gen < 8 && intel_psr_is_enabled(dev)) { DRM_DEBUG_KMS("DRRS is disabled as PSR is enabled\n"); return; } diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index d67c59b15128..d1f9b639f0d1 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -999,21 +999,16 @@ void intel_edp_backlight_off(struct intel_dp *intel_dp); void intel_edp_panel_vdd_on(struct intel_dp *intel_dp); void intel_edp_panel_on(struct intel_dp *intel_dp); void intel_edp_panel_off(struct intel_dp *intel_dp); -void intel_edp_psr_enable(struct intel_dp *intel_dp); -void intel_edp_psr_disable(struct intel_dp *intel_dp); void intel_dp_set_drrs_state(struct drm_device *dev, int refresh_rate); -void intel_edp_psr_invalidate(struct drm_device *dev, - unsigned frontbuffer_bits); -void intel_edp_psr_flush(struct drm_device *dev, - unsigned frontbuffer_bits); -void intel_edp_psr_init(struct drm_device *dev); - void intel_dp_add_properties(struct intel_dp *intel_dp, struct drm_connector *connector); void intel_dp_mst_suspend(struct drm_device *dev); void intel_dp_mst_resume(struct drm_device *dev); int intel_dp_max_link_bw(struct intel_dp *intel_dp); void intel_dp_hot_plug(struct intel_encoder *intel_encoder); void vlv_power_sequencer_reset(struct drm_i915_private *dev_priv); +uint32_t intel_dp_pack_aux(const uint8_t *src, int src_bytes); +void intel_dp_unpack_aux(uint32_t src, uint8_t *dst, int dst_bytes); + /* intel_dp_mst.c */ int intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_id); void intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port); @@ -1117,6 +1112,16 @@ void intel_backlight_register(struct drm_device *dev); void intel_backlight_unregister(struct drm_device *dev); +/* intel_psr.c */ +bool intel_psr_is_enabled(struct drm_device *dev); +void intel_psr_enable(struct intel_dp *intel_dp); +void intel_psr_disable(struct intel_dp *intel_dp); +void intel_psr_invalidate(struct drm_device *dev, + unsigned frontbuffer_bits); +void intel_psr_flush(struct drm_device *dev, + unsigned frontbuffer_bits); +void intel_psr_init(struct drm_device *dev); + /* intel_runtime_pm.c */ int intel_power_domains_init(struct drm_i915_private *); void intel_power_domains_fini(struct drm_i915_private *); diff --git a/drivers/gpu/drm/i915/intel_frontbuffer.c b/drivers/gpu/drm/i915/intel_frontbuffer.c index 58cf2e6b78f4..79f6d72179c5 100644 --- a/drivers/gpu/drm/i915/intel_frontbuffer.c +++ b/drivers/gpu/drm/i915/intel_frontbuffer.c @@ -156,7 +156,7 @@ void intel_fb_obj_invalidate(struct drm_i915_gem_object *obj, intel_mark_fb_busy(dev, obj->frontbuffer_bits, ring); - intel_edp_psr_invalidate(dev, obj->frontbuffer_bits); + intel_psr_invalidate(dev, obj->frontbuffer_bits); } /** @@ -182,7 +182,7 @@ void intel_frontbuffer_flush(struct drm_device *dev, intel_mark_fb_busy(dev, frontbuffer_bits, NULL); - intel_edp_psr_flush(dev, frontbuffer_bits); + intel_psr_flush(dev, frontbuffer_bits); /* * FIXME: Unconditional fbc flushing here is a rather gross hack and diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c new file mode 100644 index 000000000000..7b3ed910bc48 --- /dev/null +++ b/drivers/gpu/drm/i915/intel_psr.c @@ -0,0 +1,408 @@ +/* + * Copyright © 2014 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + */ + +#include + +#include "intel_drv.h" +#include "i915_drv.h" + +static bool is_edp_psr(struct intel_dp *intel_dp) +{ + return intel_dp->psr_dpcd[0] & DP_PSR_IS_SUPPORTED; +} + +bool intel_psr_is_enabled(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + if (!HAS_PSR(dev)) + return false; + + return I915_READ(EDP_PSR_CTL(dev)) & EDP_PSR_ENABLE; +} + +static void intel_psr_write_vsc(struct intel_dp *intel_dp, + struct edp_vsc_psr *vsc_psr) +{ + struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); + struct drm_device *dev = dig_port->base.base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_crtc *crtc = to_intel_crtc(dig_port->base.base.crtc); + u32 ctl_reg = HSW_TVIDEO_DIP_CTL(crtc->config.cpu_transcoder); + u32 data_reg = HSW_TVIDEO_DIP_VSC_DATA(crtc->config.cpu_transcoder); + uint32_t *data = (uint32_t *) vsc_psr; + unsigned int i; + + /* As per BSPec (Pipe Video Data Island Packet), we need to disable + the video DIP being updated before program video DIP data buffer + registers for DIP being updated. */ + I915_WRITE(ctl_reg, 0); + POSTING_READ(ctl_reg); + + for (i = 0; i < VIDEO_DIP_VSC_DATA_SIZE; i += 4) { + if (i < sizeof(struct edp_vsc_psr)) + I915_WRITE(data_reg + i, *data++); + else + I915_WRITE(data_reg + i, 0); + } + + I915_WRITE(ctl_reg, VIDEO_DIP_ENABLE_VSC_HSW); + POSTING_READ(ctl_reg); +} + +static void intel_psr_setup_vsc(struct intel_dp *intel_dp) +{ + struct edp_vsc_psr psr_vsc; + + /* Prepare VSC packet as per EDP 1.3 spec, Table 3.10 */ + memset(&psr_vsc, 0, sizeof(psr_vsc)); + psr_vsc.sdp_header.HB0 = 0; + psr_vsc.sdp_header.HB1 = 0x7; + psr_vsc.sdp_header.HB2 = 0x2; + psr_vsc.sdp_header.HB3 = 0x8; + intel_psr_write_vsc(intel_dp, &psr_vsc); +} + +static void intel_psr_enable_sink(struct intel_dp *intel_dp) +{ + struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); + struct drm_device *dev = dig_port->base.base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; + uint32_t aux_clock_divider; + int precharge = 0x3; + bool only_standby = false; + static const uint8_t aux_msg[] = { + [0] = DP_AUX_NATIVE_WRITE << 4, + [1] = DP_SET_POWER >> 8, + [2] = DP_SET_POWER & 0xff, + [3] = 1 - 1, + [4] = DP_SET_POWER_D0, + }; + int i; + + BUILD_BUG_ON(sizeof(aux_msg) > 20); + + aux_clock_divider = intel_dp->get_aux_clock_divider(intel_dp, 0); + + if (IS_BROADWELL(dev) && dig_port->port != PORT_A) + only_standby = true; + + /* Enable PSR in sink */ + if (intel_dp->psr_dpcd[1] & DP_PSR_NO_TRAIN_ON_EXIT || only_standby) + drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, + DP_PSR_ENABLE & ~DP_PSR_MAIN_LINK_ACTIVE); + else + drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, + DP_PSR_ENABLE | DP_PSR_MAIN_LINK_ACTIVE); + + /* Setup AUX registers */ + for (i = 0; i < sizeof(aux_msg); i += 4) + I915_WRITE(EDP_PSR_AUX_DATA1(dev) + i, + intel_dp_pack_aux(&aux_msg[i], sizeof(aux_msg) - i)); + + I915_WRITE(EDP_PSR_AUX_CTL(dev), + DP_AUX_CH_CTL_TIME_OUT_400us | + (sizeof(aux_msg) << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | + (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) | + (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT)); +} + +static void intel_psr_enable_source(struct intel_dp *intel_dp) +{ + struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); + struct drm_device *dev = dig_port->base.base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; + uint32_t max_sleep_time = 0x1f; + uint32_t idle_frames = 1; + uint32_t val = 0x0; + const uint32_t link_entry_time = EDP_PSR_MIN_LINK_ENTRY_TIME_8_LINES; + bool only_standby = false; + + if (IS_BROADWELL(dev) && dig_port->port != PORT_A) + only_standby = true; + + if (intel_dp->psr_dpcd[1] & DP_PSR_NO_TRAIN_ON_EXIT || only_standby) { + val |= EDP_PSR_LINK_STANDBY; + val |= EDP_PSR_TP2_TP3_TIME_0us; + val |= EDP_PSR_TP1_TIME_0us; + val |= EDP_PSR_SKIP_AUX_EXIT; + val |= IS_BROADWELL(dev) ? BDW_PSR_SINGLE_FRAME : 0; + } else + val |= EDP_PSR_LINK_DISABLE; + + I915_WRITE(EDP_PSR_CTL(dev), val | + (IS_BROADWELL(dev) ? 0 : link_entry_time) | + max_sleep_time << EDP_PSR_MAX_SLEEP_TIME_SHIFT | + idle_frames << EDP_PSR_IDLE_FRAME_SHIFT | + EDP_PSR_ENABLE); +} + +static bool intel_psr_match_conditions(struct intel_dp *intel_dp) +{ + struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); + struct drm_device *dev = dig_port->base.base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_crtc *crtc = dig_port->base.base.crtc; + struct intel_crtc *intel_crtc = to_intel_crtc(crtc); + + lockdep_assert_held(&dev_priv->psr.lock); + WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); + WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); + + dev_priv->psr.source_ok = false; + + if (IS_HASWELL(dev) && dig_port->port != PORT_A) { + DRM_DEBUG_KMS("HSW ties PSR to DDI A (eDP)\n"); + return false; + } + + if (!i915.enable_psr) { + DRM_DEBUG_KMS("PSR disable by flag\n"); + return false; + } + + /* Below limitations aren't valid for Broadwell */ + if (IS_BROADWELL(dev)) + goto out; + + if (I915_READ(HSW_STEREO_3D_CTL(intel_crtc->config.cpu_transcoder)) & + S3D_ENABLE) { + DRM_DEBUG_KMS("PSR condition failed: Stereo 3D is Enabled\n"); + return false; + } + + if (intel_crtc->config.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE) { + DRM_DEBUG_KMS("PSR condition failed: Interlaced is Enabled\n"); + return false; + } + + out: + dev_priv->psr.source_ok = true; + return true; +} + +static void intel_psr_do_enable(struct intel_dp *intel_dp) +{ + struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); + struct drm_device *dev = intel_dig_port->base.base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; + + WARN_ON(I915_READ(EDP_PSR_CTL(dev)) & EDP_PSR_ENABLE); + WARN_ON(dev_priv->psr.active); + lockdep_assert_held(&dev_priv->psr.lock); + + /* Enable/Re-enable PSR on the host */ + intel_psr_enable_source(intel_dp); + + dev_priv->psr.active = true; +} + +void intel_psr_enable(struct intel_dp *intel_dp) +{ + struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); + struct drm_device *dev = intel_dig_port->base.base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; + + if (!HAS_PSR(dev)) { + DRM_DEBUG_KMS("PSR not supported on this platform\n"); + return; + } + + if (!is_edp_psr(intel_dp)) { + DRM_DEBUG_KMS("PSR not supported by this panel\n"); + return; + } + + mutex_lock(&dev_priv->psr.lock); + if (dev_priv->psr.enabled) { + DRM_DEBUG_KMS("PSR already in use\n"); + goto unlock; + } + + if (!intel_psr_match_conditions(intel_dp)) + goto unlock; + + dev_priv->psr.busy_frontbuffer_bits = 0; + + intel_psr_setup_vsc(intel_dp); + + /* Avoid continuous PSR exit by masking memup and hpd */ + I915_WRITE(EDP_PSR_DEBUG_CTL(dev), EDP_PSR_DEBUG_MASK_MEMUP | + EDP_PSR_DEBUG_MASK_HPD | EDP_PSR_DEBUG_MASK_LPSP); + + /* Enable PSR on the panel */ + intel_psr_enable_sink(intel_dp); + + dev_priv->psr.enabled = intel_dp; +unlock: + mutex_unlock(&dev_priv->psr.lock); +} + +void intel_psr_disable(struct intel_dp *intel_dp) +{ + struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); + struct drm_device *dev = intel_dig_port->base.base.dev; + struct drm_i915_private *dev_priv = dev->dev_private; + + mutex_lock(&dev_priv->psr.lock); + if (!dev_priv->psr.enabled) { + mutex_unlock(&dev_priv->psr.lock); + return; + } + + if (dev_priv->psr.active) { + I915_WRITE(EDP_PSR_CTL(dev), + I915_READ(EDP_PSR_CTL(dev)) & ~EDP_PSR_ENABLE); + + /* Wait till PSR is idle */ + if (_wait_for((I915_READ(EDP_PSR_STATUS_CTL(dev)) & + EDP_PSR_STATUS_STATE_MASK) == 0, 2000, 10)) + DRM_ERROR("Timed out waiting for PSR Idle State\n"); + + dev_priv->psr.active = false; + } else { + WARN_ON(I915_READ(EDP_PSR_CTL(dev)) & EDP_PSR_ENABLE); + } + + dev_priv->psr.enabled = NULL; + mutex_unlock(&dev_priv->psr.lock); + + cancel_delayed_work_sync(&dev_priv->psr.work); +} + +static void intel_psr_work(struct work_struct *work) +{ + struct drm_i915_private *dev_priv = + container_of(work, typeof(*dev_priv), psr.work.work); + struct intel_dp *intel_dp = dev_priv->psr.enabled; + + /* We have to make sure PSR is ready for re-enable + * otherwise it keeps disabled until next full enable/disable cycle. + * PSR might take some time to get fully disabled + * and be ready for re-enable. + */ + if (wait_for((I915_READ(EDP_PSR_STATUS_CTL(dev_priv->dev)) & + EDP_PSR_STATUS_STATE_MASK) == 0, 50)) { + DRM_ERROR("Timed out waiting for PSR Idle for re-enable\n"); + return; + } + + mutex_lock(&dev_priv->psr.lock); + intel_dp = dev_priv->psr.enabled; + + if (!intel_dp) + goto unlock; + + /* + * The delayed work can race with an invalidate hence we need to + * recheck. Since psr_flush first clears this and then reschedules we + * won't ever miss a flush when bailing out here. + */ + if (dev_priv->psr.busy_frontbuffer_bits) + goto unlock; + + intel_psr_do_enable(intel_dp); +unlock: + mutex_unlock(&dev_priv->psr.lock); +} + +static void intel_psr_exit(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + if (dev_priv->psr.active) { + u32 val = I915_READ(EDP_PSR_CTL(dev)); + + WARN_ON(!(val & EDP_PSR_ENABLE)); + + I915_WRITE(EDP_PSR_CTL(dev), val & ~EDP_PSR_ENABLE); + + dev_priv->psr.active = false; + } + +} + +void intel_psr_invalidate(struct drm_device *dev, + unsigned frontbuffer_bits) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_crtc *crtc; + enum pipe pipe; + + mutex_lock(&dev_priv->psr.lock); + if (!dev_priv->psr.enabled) { + mutex_unlock(&dev_priv->psr.lock); + return; + } + + crtc = dp_to_dig_port(dev_priv->psr.enabled)->base.base.crtc; + pipe = to_intel_crtc(crtc)->pipe; + + intel_psr_exit(dev); + + frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(pipe); + + dev_priv->psr.busy_frontbuffer_bits |= frontbuffer_bits; + mutex_unlock(&dev_priv->psr.lock); +} + +void intel_psr_flush(struct drm_device *dev, + unsigned frontbuffer_bits) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_crtc *crtc; + enum pipe pipe; + + mutex_lock(&dev_priv->psr.lock); + if (!dev_priv->psr.enabled) { + mutex_unlock(&dev_priv->psr.lock); + return; + } + + crtc = dp_to_dig_port(dev_priv->psr.enabled)->base.base.crtc; + pipe = to_intel_crtc(crtc)->pipe; + dev_priv->psr.busy_frontbuffer_bits &= ~frontbuffer_bits; + + /* + * On Haswell sprite plane updates don't result in a psr invalidating + * signal in the hardware. Which means we need to manually fake this in + * software for all flushes, not just when we've seen a preceding + * invalidation through frontbuffer rendering. + */ + if (IS_HASWELL(dev) && + (frontbuffer_bits & INTEL_FRONTBUFFER_SPRITE(pipe))) + intel_psr_exit(dev); + + if (!dev_priv->psr.active && !dev_priv->psr.busy_frontbuffer_bits) + schedule_delayed_work(&dev_priv->psr.work, + msecs_to_jiffies(100)); + mutex_unlock(&dev_priv->psr.lock); +} + +void intel_psr_init(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + INIT_DELAYED_WORK(&dev_priv->psr.work, intel_psr_work); + mutex_init(&dev_priv->psr.lock); +} -- 2.20.1