From 7ff0ebcc1e30e3216c8c62ee71f59ac830b10364 Mon Sep 17 00:00:00 2001 From: Rodrigo Vivi Date: Mon, 8 Dec 2014 14:09:10 -0200 Subject: [PATCH] drm/i915: Move FBC stuff to intel_fbc.c No functional changes. This is just the begin of a FBC rework. v2 (Paulo): - Revert intel_fbc_init() changed parameter. - Revert set_no_fbc_reason() rename. - Rebase. Cc: Paulo Zanoni Signed-off-by: Rodrigo Vivi Signed-off-by: Paulo Zanoni Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/Makefile | 1 + drivers/gpu/drm/i915/i915_drv.h | 3 - drivers/gpu/drm/i915/i915_suspend.c | 2 +- drivers/gpu/drm/i915/intel_display.c | 22 +- drivers/gpu/drm/i915/intel_drv.h | 9 +- drivers/gpu/drm/i915/intel_fbc.c | 675 +++++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_pm.c | 651 +------------------------- drivers/gpu/drm/i915/intel_sprite.c | 4 +- 8 files changed, 698 insertions(+), 669 deletions(-) create mode 100644 drivers/gpu/drm/i915/intel_fbc.c diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index e4083e41a600..3cf70a61b44f 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -47,6 +47,7 @@ i915-y += intel_renderstate_gen6.o \ i915-y += intel_audio.o \ intel_bios.o \ intel_display.o \ + intel_fbc.o \ intel_fifo_underrun.o \ intel_frontbuffer.o \ intel_modes.o \ diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 95dfa2dd35b9..c74dc946cbf6 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -2963,9 +2963,6 @@ extern void intel_modeset_setup_hw_state(struct drm_device *dev, bool force_restore); extern void i915_redisable_vga(struct drm_device *dev); extern void i915_redisable_vga_power_on(struct drm_device *dev); -extern bool intel_fbc_enabled(struct drm_device *dev); -extern void bdw_fbc_sw_flush(struct drm_device *dev, u32 value); -extern void intel_disable_fbc(struct drm_device *dev); extern bool ironlake_set_drps(struct drm_device *dev, u8 val); extern void intel_init_pch_refclk(struct drm_device *dev); extern void gen6_set_rps(struct drm_device *dev, u8 val); diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c index dfe661743398..1e4999dd3ed5 100644 --- a/drivers/gpu/drm/i915/i915_suspend.c +++ b/drivers/gpu/drm/i915/i915_suspend.c @@ -264,7 +264,7 @@ static void i915_restore_display(struct drm_device *dev) } /* only restore FBC info on the platform that supports FBC*/ - intel_disable_fbc(dev); + intel_fbc_disable(dev); /* restore FBC interval */ if (HAS_FBC(dev) && INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev)) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index d5153a4f90fe..841af6c1f50b 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4201,7 +4201,7 @@ static void intel_crtc_enable_planes(struct drm_crtc *crtc) hsw_enable_ips(intel_crtc); mutex_lock(&dev->struct_mutex); - intel_update_fbc(dev); + intel_fbc_update(dev); mutex_unlock(&dev->struct_mutex); /* @@ -4223,7 +4223,7 @@ static void intel_crtc_disable_planes(struct drm_crtc *crtc) intel_crtc_wait_for_pending_flips(crtc); if (dev_priv->fbc.plane == plane) - intel_disable_fbc(dev); + intel_fbc_disable(dev); hsw_disable_ips(intel_crtc); @@ -4527,7 +4527,7 @@ static void ironlake_crtc_disable(struct drm_crtc *crtc) intel_update_watermarks(crtc); mutex_lock(&dev->struct_mutex); - intel_update_fbc(dev); + intel_fbc_update(dev); mutex_unlock(&dev->struct_mutex); } @@ -4584,7 +4584,7 @@ static void haswell_crtc_disable(struct drm_crtc *crtc) intel_update_watermarks(crtc); mutex_lock(&dev->struct_mutex); - intel_update_fbc(dev); + intel_fbc_update(dev); mutex_unlock(&dev->struct_mutex); if (intel_crtc_to_shared_dpll(intel_crtc)) @@ -5189,7 +5189,7 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc) intel_update_watermarks(crtc); mutex_lock(&dev->struct_mutex); - intel_update_fbc(dev); + intel_fbc_update(dev); mutex_unlock(&dev->struct_mutex); } @@ -8950,7 +8950,7 @@ static void intel_unpin_work_fn(struct work_struct *__work) drm_gem_object_unreference(&work->pending_flip_obj->base); drm_gem_object_unreference(&work->old_fb_obj->base); - intel_update_fbc(dev); + intel_fbc_update(dev); if (work->flip_queued_req) i915_gem_request_assign(&work->flip_queued_req, NULL); @@ -9747,7 +9747,7 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, i915_gem_track_fb(work->old_fb_obj, obj, INTEL_FRONTBUFFER_PRIMARY(pipe)); - intel_disable_fbc(dev); + intel_fbc_disable(dev); intel_frontbuffer_flip_prepare(dev, INTEL_FRONTBUFFER_PRIMARY(pipe)); mutex_unlock(&dev->struct_mutex); @@ -11816,7 +11816,7 @@ intel_commit_primary_plane(struct drm_plane *plane, INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev) && dev_priv->fbc.plane == intel_crtc->plane && intel_plane->rotation != BIT(DRM_ROTATE_0)) { - intel_disable_fbc(dev); + intel_fbc_disable(dev); } if (state->visible) { @@ -11851,7 +11851,7 @@ intel_commit_primary_plane(struct drm_plane *plane, intel_frontbuffer_flip(dev, INTEL_FRONTBUFFER_PRIMARY(pipe)); mutex_lock(&dev->struct_mutex); - intel_update_fbc(dev); + intel_fbc_update(dev); mutex_unlock(&dev->struct_mutex); } } @@ -13050,7 +13050,7 @@ void intel_modeset_init(struct drm_device *dev) intel_setup_outputs(dev); /* Just in case the BIOS is doing something questionable. */ - intel_disable_fbc(dev); + intel_fbc_disable(dev); drm_modeset_lock_all(dev); intel_modeset_setup_hw_state(dev, false); @@ -13567,7 +13567,7 @@ void intel_modeset_cleanup(struct drm_device *dev) intel_unregister_dsm_handler(); - intel_disable_fbc(dev); + intel_fbc_disable(dev); ironlake_teardown_rc6(dev); diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 61a88fa69978..588b618ab668 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -1063,6 +1063,13 @@ static inline void intel_fbdev_restore_mode(struct drm_device *dev) } #endif +/* intel_fbc.c */ +bool intel_fbc_enabled(struct drm_device *dev); +void intel_fbc_update(struct drm_device *dev); +void intel_fbc_init(struct drm_i915_private *dev_priv); +void intel_fbc_disable(struct drm_device *dev); +void bdw_fbc_sw_flush(struct drm_device *dev, u32 value); + /* intel_hdmi.c */ void intel_hdmi_init(struct drm_device *dev, int hdmi_reg, enum port port); void intel_hdmi_init_connector(struct intel_digital_port *intel_dig_port, @@ -1169,8 +1176,6 @@ void intel_update_sprite_watermarks(struct drm_plane *plane, bool enabled, bool scaled); void intel_init_pm(struct drm_device *dev); void intel_pm_setup(struct drm_device *dev); -bool intel_fbc_enabled(struct drm_device *dev); -void intel_update_fbc(struct drm_device *dev); void intel_gpu_ips_init(struct drm_i915_private *dev_priv); void intel_gpu_ips_teardown(void); void intel_init_gt_powersave(struct drm_device *dev); diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c new file mode 100644 index 000000000000..f1eeb86a3d1b --- /dev/null +++ b/drivers/gpu/drm/i915/intel_fbc.c @@ -0,0 +1,675 @@ +/* + * 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 "intel_drv.h" +#include "i915_drv.h" + +/* FBC, or Frame Buffer Compression, is a technique employed to compress the + * framebuffer contents in-memory, aiming at reducing the required bandwidth + * during in-memory transfers and, therefore, reduce the power packet. + * + * The benefits of FBC are mostly visible with solid backgrounds and + * variation-less patterns. + * + * FBC-related functionality can be enabled by the means of the + * i915.i915_fbc_enable parameter + */ + +static void i8xx_fbc_disable(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + u32 fbc_ctl; + + dev_priv->fbc.enabled = false; + + /* Disable compression */ + fbc_ctl = I915_READ(FBC_CONTROL); + if ((fbc_ctl & FBC_CTL_EN) == 0) + return; + + fbc_ctl &= ~FBC_CTL_EN; + I915_WRITE(FBC_CONTROL, fbc_ctl); + + /* Wait for compressing bit to clear */ + if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10)) { + DRM_DEBUG_KMS("FBC idle timed out\n"); + return; + } + + DRM_DEBUG_KMS("disabled FBC\n"); +} + +static void i8xx_fbc_enable(struct drm_crtc *crtc) +{ + struct drm_device *dev = crtc->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_framebuffer *fb = crtc->primary->fb; + struct drm_i915_gem_object *obj = intel_fb_obj(fb); + struct intel_crtc *intel_crtc = to_intel_crtc(crtc); + int cfb_pitch; + int i; + u32 fbc_ctl; + + dev_priv->fbc.enabled = true; + + cfb_pitch = dev_priv->fbc.size / FBC_LL_SIZE; + if (fb->pitches[0] < cfb_pitch) + cfb_pitch = fb->pitches[0]; + + /* FBC_CTL wants 32B or 64B units */ + if (IS_GEN2(dev)) + cfb_pitch = (cfb_pitch / 32) - 1; + else + cfb_pitch = (cfb_pitch / 64) - 1; + + /* Clear old tags */ + for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++) + I915_WRITE(FBC_TAG + (i * 4), 0); + + if (IS_GEN4(dev)) { + u32 fbc_ctl2; + + /* Set it up... */ + fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | FBC_CTL_CPU_FENCE; + fbc_ctl2 |= FBC_CTL_PLANE(intel_crtc->plane); + I915_WRITE(FBC_CONTROL2, fbc_ctl2); + I915_WRITE(FBC_FENCE_OFF, crtc->y); + } + + /* enable it... */ + fbc_ctl = I915_READ(FBC_CONTROL); + fbc_ctl &= 0x3fff << FBC_CTL_INTERVAL_SHIFT; + fbc_ctl |= FBC_CTL_EN | FBC_CTL_PERIODIC; + if (IS_I945GM(dev)) + fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */ + fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT; + fbc_ctl |= obj->fence_reg; + I915_WRITE(FBC_CONTROL, fbc_ctl); + + DRM_DEBUG_KMS("enabled FBC, pitch %d, yoff %d, plane %c\n", + cfb_pitch, crtc->y, plane_name(intel_crtc->plane)); +} + +static bool i8xx_fbc_enabled(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + return I915_READ(FBC_CONTROL) & FBC_CTL_EN; +} + +static void g4x_fbc_enable(struct drm_crtc *crtc) +{ + struct drm_device *dev = crtc->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_framebuffer *fb = crtc->primary->fb; + struct drm_i915_gem_object *obj = intel_fb_obj(fb); + struct intel_crtc *intel_crtc = to_intel_crtc(crtc); + u32 dpfc_ctl; + + dev_priv->fbc.enabled = true; + + dpfc_ctl = DPFC_CTL_PLANE(intel_crtc->plane) | DPFC_SR_EN; + if (drm_format_plane_cpp(fb->pixel_format, 0) == 2) + dpfc_ctl |= DPFC_CTL_LIMIT_2X; + else + dpfc_ctl |= DPFC_CTL_LIMIT_1X; + dpfc_ctl |= DPFC_CTL_FENCE_EN | obj->fence_reg; + + I915_WRITE(DPFC_FENCE_YOFF, crtc->y); + + /* enable it... */ + I915_WRITE(DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN); + + DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane)); +} + +static void g4x_fbc_disable(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + u32 dpfc_ctl; + + dev_priv->fbc.enabled = false; + + /* Disable compression */ + dpfc_ctl = I915_READ(DPFC_CONTROL); + if (dpfc_ctl & DPFC_CTL_EN) { + dpfc_ctl &= ~DPFC_CTL_EN; + I915_WRITE(DPFC_CONTROL, dpfc_ctl); + + DRM_DEBUG_KMS("disabled FBC\n"); + } +} + +static bool g4x_fbc_enabled(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + return I915_READ(DPFC_CONTROL) & DPFC_CTL_EN; +} + +static void snb_fbc_blit_update(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + u32 blt_ecoskpd; + + /* Make sure blitter notifies FBC of writes */ + + /* Blitter is part of Media powerwell on VLV. No impact of + * his param in other platforms for now */ + gen6_gt_force_wake_get(dev_priv, FORCEWAKE_MEDIA); + + blt_ecoskpd = I915_READ(GEN6_BLITTER_ECOSKPD); + blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY << + GEN6_BLITTER_LOCK_SHIFT; + I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd); + blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY; + I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd); + blt_ecoskpd &= ~(GEN6_BLITTER_FBC_NOTIFY << + GEN6_BLITTER_LOCK_SHIFT); + I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd); + POSTING_READ(GEN6_BLITTER_ECOSKPD); + + gen6_gt_force_wake_put(dev_priv, FORCEWAKE_MEDIA); +} + +static void ilk_fbc_enable(struct drm_crtc *crtc) +{ + struct drm_device *dev = crtc->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_framebuffer *fb = crtc->primary->fb; + struct drm_i915_gem_object *obj = intel_fb_obj(fb); + struct intel_crtc *intel_crtc = to_intel_crtc(crtc); + u32 dpfc_ctl; + + dev_priv->fbc.enabled = true; + + dpfc_ctl = DPFC_CTL_PLANE(intel_crtc->plane); + if (drm_format_plane_cpp(fb->pixel_format, 0) == 2) + dev_priv->fbc.threshold++; + + switch (dev_priv->fbc.threshold) { + case 4: + case 3: + dpfc_ctl |= DPFC_CTL_LIMIT_4X; + break; + case 2: + dpfc_ctl |= DPFC_CTL_LIMIT_2X; + break; + case 1: + dpfc_ctl |= DPFC_CTL_LIMIT_1X; + break; + } + dpfc_ctl |= DPFC_CTL_FENCE_EN; + if (IS_GEN5(dev)) + dpfc_ctl |= obj->fence_reg; + + I915_WRITE(ILK_DPFC_FENCE_YOFF, crtc->y); + I915_WRITE(ILK_FBC_RT_BASE, i915_gem_obj_ggtt_offset(obj) | ILK_FBC_RT_VALID); + /* enable it... */ + I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN); + + if (IS_GEN6(dev)) { + I915_WRITE(SNB_DPFC_CTL_SA, + SNB_CPU_FENCE_ENABLE | obj->fence_reg); + I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y); + snb_fbc_blit_update(dev); + } + + DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane)); +} + +static void ilk_fbc_disable(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + u32 dpfc_ctl; + + dev_priv->fbc.enabled = false; + + /* Disable compression */ + dpfc_ctl = I915_READ(ILK_DPFC_CONTROL); + if (dpfc_ctl & DPFC_CTL_EN) { + dpfc_ctl &= ~DPFC_CTL_EN; + I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl); + + DRM_DEBUG_KMS("disabled FBC\n"); + } +} + +static bool ilk_fbc_enabled(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN; +} + +static void gen7_fbc_enable(struct drm_crtc *crtc) +{ + struct drm_device *dev = crtc->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_framebuffer *fb = crtc->primary->fb; + struct drm_i915_gem_object *obj = intel_fb_obj(fb); + struct intel_crtc *intel_crtc = to_intel_crtc(crtc); + u32 dpfc_ctl; + + dev_priv->fbc.enabled = true; + + dpfc_ctl = IVB_DPFC_CTL_PLANE(intel_crtc->plane); + if (drm_format_plane_cpp(fb->pixel_format, 0) == 2) + dev_priv->fbc.threshold++; + + switch (dev_priv->fbc.threshold) { + case 4: + case 3: + dpfc_ctl |= DPFC_CTL_LIMIT_4X; + break; + case 2: + dpfc_ctl |= DPFC_CTL_LIMIT_2X; + break; + case 1: + dpfc_ctl |= DPFC_CTL_LIMIT_1X; + break; + } + + dpfc_ctl |= IVB_DPFC_CTL_FENCE_EN; + + if (dev_priv->fbc.false_color) + dpfc_ctl |= FBC_CTL_FALSE_COLOR; + + I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN); + + if (IS_IVYBRIDGE(dev)) { + /* WaFbcAsynchFlipDisableFbcQueue:ivb */ + I915_WRITE(ILK_DISPLAY_CHICKEN1, + I915_READ(ILK_DISPLAY_CHICKEN1) | + ILK_FBCQ_DIS); + } else { + /* WaFbcAsynchFlipDisableFbcQueue:hsw,bdw */ + I915_WRITE(CHICKEN_PIPESL_1(intel_crtc->pipe), + I915_READ(CHICKEN_PIPESL_1(intel_crtc->pipe)) | + HSW_FBCQ_DIS); + } + + I915_WRITE(SNB_DPFC_CTL_SA, + SNB_CPU_FENCE_ENABLE | obj->fence_reg); + I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y); + + snb_fbc_blit_update(dev); + + DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane)); +} + +bool intel_fbc_enabled(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + return dev_priv->fbc.enabled; +} + +void bdw_fbc_sw_flush(struct drm_device *dev, u32 value) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + if (!IS_GEN8(dev)) + return; + + if (!intel_fbc_enabled(dev)) + return; + + I915_WRITE(MSG_FBC_REND_STATE, value); +} + +static void intel_fbc_work_fn(struct work_struct *__work) +{ + struct intel_fbc_work *work = + container_of(to_delayed_work(__work), + struct intel_fbc_work, work); + struct drm_device *dev = work->crtc->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + + mutex_lock(&dev->struct_mutex); + if (work == dev_priv->fbc.fbc_work) { + /* Double check that we haven't switched fb without cancelling + * the prior work. + */ + if (work->crtc->primary->fb == work->fb) { + dev_priv->display.enable_fbc(work->crtc); + + dev_priv->fbc.plane = to_intel_crtc(work->crtc)->plane; + dev_priv->fbc.fb_id = work->crtc->primary->fb->base.id; + dev_priv->fbc.y = work->crtc->y; + } + + dev_priv->fbc.fbc_work = NULL; + } + mutex_unlock(&dev->struct_mutex); + + kfree(work); +} + +static void intel_fbc_cancel_work(struct drm_i915_private *dev_priv) +{ + if (dev_priv->fbc.fbc_work == NULL) + return; + + DRM_DEBUG_KMS("cancelling pending FBC enable\n"); + + /* Synchronisation is provided by struct_mutex and checking of + * dev_priv->fbc.fbc_work, so we can perform the cancellation + * entirely asynchronously. + */ + if (cancel_delayed_work(&dev_priv->fbc.fbc_work->work)) + /* tasklet was killed before being run, clean up */ + kfree(dev_priv->fbc.fbc_work); + + /* Mark the work as no longer wanted so that if it does + * wake-up (because the work was already running and waiting + * for our mutex), it will discover that is no longer + * necessary to run. + */ + dev_priv->fbc.fbc_work = NULL; +} + +static void intel_fbc_enable(struct drm_crtc *crtc) +{ + struct intel_fbc_work *work; + struct drm_device *dev = crtc->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + + if (!dev_priv->display.enable_fbc) + return; + + intel_fbc_cancel_work(dev_priv); + + work = kzalloc(sizeof(*work), GFP_KERNEL); + if (work == NULL) { + DRM_ERROR("Failed to allocate FBC work structure\n"); + dev_priv->display.enable_fbc(crtc); + return; + } + + work->crtc = crtc; + work->fb = crtc->primary->fb; + INIT_DELAYED_WORK(&work->work, intel_fbc_work_fn); + + dev_priv->fbc.fbc_work = work; + + /* Delay the actual enabling to let pageflipping cease and the + * display to settle before starting the compression. Note that + * this delay also serves a second purpose: it allows for a + * vblank to pass after disabling the FBC before we attempt + * to modify the control registers. + * + * A more complicated solution would involve tracking vblanks + * following the termination of the page-flipping sequence + * and indeed performing the enable as a co-routine and not + * waiting synchronously upon the vblank. + * + * WaFbcWaitForVBlankBeforeEnable:ilk,snb + */ + schedule_delayed_work(&work->work, msecs_to_jiffies(50)); +} + +void intel_fbc_disable(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + intel_fbc_cancel_work(dev_priv); + + if (!dev_priv->display.disable_fbc) + return; + + dev_priv->display.disable_fbc(dev); + dev_priv->fbc.plane = -1; +} + +static bool set_no_fbc_reason(struct drm_i915_private *dev_priv, + enum no_fbc_reason reason) +{ + if (dev_priv->fbc.no_fbc_reason == reason) + return false; + + dev_priv->fbc.no_fbc_reason = reason; + return true; +} + +/** + * intel_fbc_update - enable/disable FBC as needed + * @dev: the drm_device + * + * Set up the framebuffer compression hardware at mode set time. We + * enable it if possible: + * - plane A only (on pre-965) + * - no pixel mulitply/line duplication + * - no alpha buffer discard + * - no dual wide + * - framebuffer <= max_hdisplay in width, max_vdisplay in height + * + * We can't assume that any compression will take place (worst case), + * so the compressed buffer has to be the same size as the uncompressed + * one. It also must reside (along with the line length buffer) in + * stolen memory. + * + * We need to enable/disable FBC on a global basis. + */ +void intel_fbc_update(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct drm_crtc *crtc = NULL, *tmp_crtc; + struct intel_crtc *intel_crtc; + struct drm_framebuffer *fb; + struct drm_i915_gem_object *obj; + const struct drm_display_mode *adjusted_mode; + unsigned int max_width, max_height; + + if (!HAS_FBC(dev)) { + set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED); + return; + } + + if (!i915.powersave) { + if (set_no_fbc_reason(dev_priv, FBC_MODULE_PARAM)) + DRM_DEBUG_KMS("fbc disabled per module param\n"); + return; + } + + /* + * If FBC is already on, we just have to verify that we can + * keep it that way... + * Need to disable if: + * - more than one pipe is active + * - changing FBC params (stride, fence, mode) + * - new fb is too large to fit in compressed buffer + * - going to an unsupported config (interlace, pixel multiply, etc.) + */ + for_each_crtc(dev, tmp_crtc) { + if (intel_crtc_active(tmp_crtc) && + to_intel_crtc(tmp_crtc)->primary_enabled) { + if (crtc) { + if (set_no_fbc_reason(dev_priv, FBC_MULTIPLE_PIPES)) + DRM_DEBUG_KMS("more than one pipe active, disabling compression\n"); + goto out_disable; + } + crtc = tmp_crtc; + } + } + + if (!crtc || crtc->primary->fb == NULL) { + if (set_no_fbc_reason(dev_priv, FBC_NO_OUTPUT)) + DRM_DEBUG_KMS("no output, disabling\n"); + goto out_disable; + } + + intel_crtc = to_intel_crtc(crtc); + fb = crtc->primary->fb; + obj = intel_fb_obj(fb); + adjusted_mode = &intel_crtc->config.adjusted_mode; + + if (i915.enable_fbc < 0) { + if (set_no_fbc_reason(dev_priv, FBC_CHIP_DEFAULT)) + DRM_DEBUG_KMS("disabled per chip default\n"); + goto out_disable; + } + if (!i915.enable_fbc) { + if (set_no_fbc_reason(dev_priv, FBC_MODULE_PARAM)) + DRM_DEBUG_KMS("fbc disabled per module param\n"); + goto out_disable; + } + if ((adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) || + (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)) { + if (set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED_MODE)) + DRM_DEBUG_KMS("mode incompatible with compression, " + "disabling\n"); + goto out_disable; + } + + if (INTEL_INFO(dev)->gen >= 8 || IS_HASWELL(dev)) { + max_width = 4096; + max_height = 4096; + } else if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) { + max_width = 4096; + max_height = 2048; + } else { + max_width = 2048; + max_height = 1536; + } + if (intel_crtc->config.pipe_src_w > max_width || + intel_crtc->config.pipe_src_h > max_height) { + if (set_no_fbc_reason(dev_priv, FBC_MODE_TOO_LARGE)) + DRM_DEBUG_KMS("mode too large for compression, disabling\n"); + goto out_disable; + } + if ((INTEL_INFO(dev)->gen < 4 || HAS_DDI(dev)) && + intel_crtc->plane != PLANE_A) { + if (set_no_fbc_reason(dev_priv, FBC_BAD_PLANE)) + DRM_DEBUG_KMS("plane not A, disabling compression\n"); + goto out_disable; + } + + /* The use of a CPU fence is mandatory in order to detect writes + * by the CPU to the scanout and trigger updates to the FBC. + */ + if (obj->tiling_mode != I915_TILING_X || + obj->fence_reg == I915_FENCE_REG_NONE) { + if (set_no_fbc_reason(dev_priv, FBC_NOT_TILED)) + DRM_DEBUG_KMS("framebuffer not tiled or fenced, disabling compression\n"); + goto out_disable; + } + if (INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev) && + to_intel_plane(crtc->primary)->rotation != BIT(DRM_ROTATE_0)) { + if (set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED_MODE)) + DRM_DEBUG_KMS("Rotation unsupported, disabling\n"); + goto out_disable; + } + + /* If the kernel debugger is active, always disable compression */ + if (in_dbg_master()) + goto out_disable; + + if (i915_gem_stolen_setup_compression(dev, obj->base.size, + drm_format_plane_cpp(fb->pixel_format, 0))) { + if (set_no_fbc_reason(dev_priv, FBC_STOLEN_TOO_SMALL)) + DRM_DEBUG_KMS("framebuffer too large, disabling compression\n"); + goto out_disable; + } + + /* If the scanout has not changed, don't modify the FBC settings. + * Note that we make the fundamental assumption that the fb->obj + * cannot be unpinned (and have its GTT offset and fence revoked) + * without first being decoupled from the scanout and FBC disabled. + */ + if (dev_priv->fbc.plane == intel_crtc->plane && + dev_priv->fbc.fb_id == fb->base.id && + dev_priv->fbc.y == crtc->y) + return; + + if (intel_fbc_enabled(dev)) { + /* We update FBC along two paths, after changing fb/crtc + * configuration (modeswitching) and after page-flipping + * finishes. For the latter, we know that not only did + * we disable the FBC at the start of the page-flip + * sequence, but also more than one vblank has passed. + * + * For the former case of modeswitching, it is possible + * to switch between two FBC valid configurations + * instantaneously so we do need to disable the FBC + * before we can modify its control registers. We also + * have to wait for the next vblank for that to take + * effect. However, since we delay enabling FBC we can + * assume that a vblank has passed since disabling and + * that we can safely alter the registers in the deferred + * callback. + * + * In the scenario that we go from a valid to invalid + * and then back to valid FBC configuration we have + * no strict enforcement that a vblank occurred since + * disabling the FBC. However, along all current pipe + * disabling paths we do need to wait for a vblank at + * some point. And we wait before enabling FBC anyway. + */ + DRM_DEBUG_KMS("disabling active FBC for update\n"); + intel_fbc_disable(dev); + } + + intel_fbc_enable(crtc); + dev_priv->fbc.no_fbc_reason = FBC_OK; + return; + +out_disable: + /* Multiple disables should be harmless */ + if (intel_fbc_enabled(dev)) { + DRM_DEBUG_KMS("unsupported config, disabling FBC\n"); + intel_fbc_disable(dev); + } + i915_gem_stolen_cleanup_compression(dev); +} + +void intel_fbc_init(struct drm_i915_private *dev_priv) +{ + if (!HAS_FBC(dev_priv)) { + dev_priv->fbc.enabled = false; + return; + } + + if (INTEL_INFO(dev_priv)->gen >= 7) { + dev_priv->display.fbc_enabled = ilk_fbc_enabled; + dev_priv->display.enable_fbc = gen7_fbc_enable; + dev_priv->display.disable_fbc = ilk_fbc_disable; + } else if (INTEL_INFO(dev_priv)->gen >= 5) { + dev_priv->display.fbc_enabled = ilk_fbc_enabled; + dev_priv->display.enable_fbc = ilk_fbc_enable; + dev_priv->display.disable_fbc = ilk_fbc_disable; + } else if (IS_GM45(dev_priv)) { + dev_priv->display.fbc_enabled = g4x_fbc_enabled; + dev_priv->display.enable_fbc = g4x_fbc_enable; + dev_priv->display.disable_fbc = g4x_fbc_disable; + } else { + dev_priv->display.fbc_enabled = i8xx_fbc_enabled; + dev_priv->display.enable_fbc = i8xx_fbc_enable; + dev_priv->display.disable_fbc = i8xx_fbc_disable; + + /* This value was pulled out of someone's hat */ + I915_WRITE(FBC_CONTROL, 500 << FBC_CTL_INTERVAL_SHIFT); + } + + dev_priv->fbc.enabled = dev_priv->display.fbc_enabled(dev_priv->dev); +} diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 78911e29439c..99865c046c8a 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -52,17 +52,6 @@ #define INTEL_RC6p_ENABLE (1<<1) #define INTEL_RC6pp_ENABLE (1<<2) -/* FBC, or Frame Buffer Compression, is a technique employed to compress the - * framebuffer contents in-memory, aiming at reducing the required bandwidth - * during in-memory transfers and, therefore, reduce the power packet. - * - * The benefits of FBC are mostly visible with solid backgrounds and - * variation-less patterns. - * - * FBC-related functionality can be enabled by the means of the - * i915.i915_enable_fbc parameter - */ - static void gen9_init_clock_gating(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -87,613 +76,6 @@ static void gen9_init_clock_gating(struct drm_device *dev) _MASKED_BIT_ENABLE(GEN8_4x4_STC_OPTIMIZATION_DISABLE)); } -static void i8xx_disable_fbc(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - u32 fbc_ctl; - - dev_priv->fbc.enabled = false; - - /* Disable compression */ - fbc_ctl = I915_READ(FBC_CONTROL); - if ((fbc_ctl & FBC_CTL_EN) == 0) - return; - - fbc_ctl &= ~FBC_CTL_EN; - I915_WRITE(FBC_CONTROL, fbc_ctl); - - /* Wait for compressing bit to clear */ - if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10)) { - DRM_DEBUG_KMS("FBC idle timed out\n"); - return; - } - - DRM_DEBUG_KMS("disabled FBC\n"); -} - -static void i8xx_enable_fbc(struct drm_crtc *crtc) -{ - struct drm_device *dev = crtc->dev; - struct drm_i915_private *dev_priv = dev->dev_private; - struct drm_framebuffer *fb = crtc->primary->fb; - struct drm_i915_gem_object *obj = intel_fb_obj(fb); - struct intel_crtc *intel_crtc = to_intel_crtc(crtc); - int cfb_pitch; - int i; - u32 fbc_ctl; - - dev_priv->fbc.enabled = true; - - cfb_pitch = dev_priv->fbc.size / FBC_LL_SIZE; - if (fb->pitches[0] < cfb_pitch) - cfb_pitch = fb->pitches[0]; - - /* FBC_CTL wants 32B or 64B units */ - if (IS_GEN2(dev)) - cfb_pitch = (cfb_pitch / 32) - 1; - else - cfb_pitch = (cfb_pitch / 64) - 1; - - /* Clear old tags */ - for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++) - I915_WRITE(FBC_TAG + (i * 4), 0); - - if (IS_GEN4(dev)) { - u32 fbc_ctl2; - - /* Set it up... */ - fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | FBC_CTL_CPU_FENCE; - fbc_ctl2 |= FBC_CTL_PLANE(intel_crtc->plane); - I915_WRITE(FBC_CONTROL2, fbc_ctl2); - I915_WRITE(FBC_FENCE_OFF, crtc->y); - } - - /* enable it... */ - fbc_ctl = I915_READ(FBC_CONTROL); - fbc_ctl &= 0x3fff << FBC_CTL_INTERVAL_SHIFT; - fbc_ctl |= FBC_CTL_EN | FBC_CTL_PERIODIC; - if (IS_I945GM(dev)) - fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */ - fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT; - fbc_ctl |= obj->fence_reg; - I915_WRITE(FBC_CONTROL, fbc_ctl); - - DRM_DEBUG_KMS("enabled FBC, pitch %d, yoff %d, plane %c\n", - cfb_pitch, crtc->y, plane_name(intel_crtc->plane)); -} - -static bool i8xx_fbc_enabled(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - return I915_READ(FBC_CONTROL) & FBC_CTL_EN; -} - -static void g4x_enable_fbc(struct drm_crtc *crtc) -{ - struct drm_device *dev = crtc->dev; - struct drm_i915_private *dev_priv = dev->dev_private; - struct drm_framebuffer *fb = crtc->primary->fb; - struct drm_i915_gem_object *obj = intel_fb_obj(fb); - struct intel_crtc *intel_crtc = to_intel_crtc(crtc); - u32 dpfc_ctl; - - dev_priv->fbc.enabled = true; - - dpfc_ctl = DPFC_CTL_PLANE(intel_crtc->plane) | DPFC_SR_EN; - if (drm_format_plane_cpp(fb->pixel_format, 0) == 2) - dpfc_ctl |= DPFC_CTL_LIMIT_2X; - else - dpfc_ctl |= DPFC_CTL_LIMIT_1X; - dpfc_ctl |= DPFC_CTL_FENCE_EN | obj->fence_reg; - - I915_WRITE(DPFC_FENCE_YOFF, crtc->y); - - /* enable it... */ - I915_WRITE(DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN); - - DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane)); -} - -static void g4x_disable_fbc(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - u32 dpfc_ctl; - - dev_priv->fbc.enabled = false; - - /* Disable compression */ - dpfc_ctl = I915_READ(DPFC_CONTROL); - if (dpfc_ctl & DPFC_CTL_EN) { - dpfc_ctl &= ~DPFC_CTL_EN; - I915_WRITE(DPFC_CONTROL, dpfc_ctl); - - DRM_DEBUG_KMS("disabled FBC\n"); - } -} - -static bool g4x_fbc_enabled(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - return I915_READ(DPFC_CONTROL) & DPFC_CTL_EN; -} - -static void sandybridge_blit_fbc_update(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - u32 blt_ecoskpd; - - /* Make sure blitter notifies FBC of writes */ - - /* Blitter is part of Media powerwell on VLV. No impact of - * his param in other platforms for now */ - gen6_gt_force_wake_get(dev_priv, FORCEWAKE_MEDIA); - - blt_ecoskpd = I915_READ(GEN6_BLITTER_ECOSKPD); - blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY << - GEN6_BLITTER_LOCK_SHIFT; - I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd); - blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY; - I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd); - blt_ecoskpd &= ~(GEN6_BLITTER_FBC_NOTIFY << - GEN6_BLITTER_LOCK_SHIFT); - I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd); - POSTING_READ(GEN6_BLITTER_ECOSKPD); - - gen6_gt_force_wake_put(dev_priv, FORCEWAKE_MEDIA); -} - -static void ironlake_enable_fbc(struct drm_crtc *crtc) -{ - struct drm_device *dev = crtc->dev; - struct drm_i915_private *dev_priv = dev->dev_private; - struct drm_framebuffer *fb = crtc->primary->fb; - struct drm_i915_gem_object *obj = intel_fb_obj(fb); - struct intel_crtc *intel_crtc = to_intel_crtc(crtc); - u32 dpfc_ctl; - - dev_priv->fbc.enabled = true; - - dpfc_ctl = DPFC_CTL_PLANE(intel_crtc->plane); - if (drm_format_plane_cpp(fb->pixel_format, 0) == 2) - dev_priv->fbc.threshold++; - - switch (dev_priv->fbc.threshold) { - case 4: - case 3: - dpfc_ctl |= DPFC_CTL_LIMIT_4X; - break; - case 2: - dpfc_ctl |= DPFC_CTL_LIMIT_2X; - break; - case 1: - dpfc_ctl |= DPFC_CTL_LIMIT_1X; - break; - } - dpfc_ctl |= DPFC_CTL_FENCE_EN; - if (IS_GEN5(dev)) - dpfc_ctl |= obj->fence_reg; - - I915_WRITE(ILK_DPFC_FENCE_YOFF, crtc->y); - I915_WRITE(ILK_FBC_RT_BASE, i915_gem_obj_ggtt_offset(obj) | ILK_FBC_RT_VALID); - /* enable it... */ - I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN); - - if (IS_GEN6(dev)) { - I915_WRITE(SNB_DPFC_CTL_SA, - SNB_CPU_FENCE_ENABLE | obj->fence_reg); - I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y); - sandybridge_blit_fbc_update(dev); - } - - DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane)); -} - -static void ironlake_disable_fbc(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - u32 dpfc_ctl; - - dev_priv->fbc.enabled = false; - - /* Disable compression */ - dpfc_ctl = I915_READ(ILK_DPFC_CONTROL); - if (dpfc_ctl & DPFC_CTL_EN) { - dpfc_ctl &= ~DPFC_CTL_EN; - I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl); - - DRM_DEBUG_KMS("disabled FBC\n"); - } -} - -static bool ironlake_fbc_enabled(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN; -} - -static void gen7_enable_fbc(struct drm_crtc *crtc) -{ - struct drm_device *dev = crtc->dev; - struct drm_i915_private *dev_priv = dev->dev_private; - struct drm_framebuffer *fb = crtc->primary->fb; - struct drm_i915_gem_object *obj = intel_fb_obj(fb); - struct intel_crtc *intel_crtc = to_intel_crtc(crtc); - u32 dpfc_ctl; - - dev_priv->fbc.enabled = true; - - dpfc_ctl = IVB_DPFC_CTL_PLANE(intel_crtc->plane); - if (drm_format_plane_cpp(fb->pixel_format, 0) == 2) - dev_priv->fbc.threshold++; - - switch (dev_priv->fbc.threshold) { - case 4: - case 3: - dpfc_ctl |= DPFC_CTL_LIMIT_4X; - break; - case 2: - dpfc_ctl |= DPFC_CTL_LIMIT_2X; - break; - case 1: - dpfc_ctl |= DPFC_CTL_LIMIT_1X; - break; - } - - dpfc_ctl |= IVB_DPFC_CTL_FENCE_EN; - - if (dev_priv->fbc.false_color) - dpfc_ctl |= FBC_CTL_FALSE_COLOR; - - I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN); - - if (IS_IVYBRIDGE(dev)) { - /* WaFbcAsynchFlipDisableFbcQueue:ivb */ - I915_WRITE(ILK_DISPLAY_CHICKEN1, - I915_READ(ILK_DISPLAY_CHICKEN1) | - ILK_FBCQ_DIS); - } else { - /* WaFbcAsynchFlipDisableFbcQueue:hsw,bdw */ - I915_WRITE(CHICKEN_PIPESL_1(intel_crtc->pipe), - I915_READ(CHICKEN_PIPESL_1(intel_crtc->pipe)) | - HSW_FBCQ_DIS); - } - - I915_WRITE(SNB_DPFC_CTL_SA, - SNB_CPU_FENCE_ENABLE | obj->fence_reg); - I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y); - - sandybridge_blit_fbc_update(dev); - - DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane)); -} - -bool intel_fbc_enabled(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - return dev_priv->fbc.enabled; -} - -void bdw_fbc_sw_flush(struct drm_device *dev, u32 value) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - if (!IS_GEN8(dev)) - return; - - if (!intel_fbc_enabled(dev)) - return; - - I915_WRITE(MSG_FBC_REND_STATE, value); -} - -static void intel_fbc_work_fn(struct work_struct *__work) -{ - struct intel_fbc_work *work = - container_of(to_delayed_work(__work), - struct intel_fbc_work, work); - struct drm_device *dev = work->crtc->dev; - struct drm_i915_private *dev_priv = dev->dev_private; - - mutex_lock(&dev->struct_mutex); - if (work == dev_priv->fbc.fbc_work) { - /* Double check that we haven't switched fb without cancelling - * the prior work. - */ - if (work->crtc->primary->fb == work->fb) { - dev_priv->display.enable_fbc(work->crtc); - - dev_priv->fbc.plane = to_intel_crtc(work->crtc)->plane; - dev_priv->fbc.fb_id = work->crtc->primary->fb->base.id; - dev_priv->fbc.y = work->crtc->y; - } - - dev_priv->fbc.fbc_work = NULL; - } - mutex_unlock(&dev->struct_mutex); - - kfree(work); -} - -static void intel_cancel_fbc_work(struct drm_i915_private *dev_priv) -{ - if (dev_priv->fbc.fbc_work == NULL) - return; - - DRM_DEBUG_KMS("cancelling pending FBC enable\n"); - - /* Synchronisation is provided by struct_mutex and checking of - * dev_priv->fbc.fbc_work, so we can perform the cancellation - * entirely asynchronously. - */ - if (cancel_delayed_work(&dev_priv->fbc.fbc_work->work)) - /* tasklet was killed before being run, clean up */ - kfree(dev_priv->fbc.fbc_work); - - /* Mark the work as no longer wanted so that if it does - * wake-up (because the work was already running and waiting - * for our mutex), it will discover that is no longer - * necessary to run. - */ - dev_priv->fbc.fbc_work = NULL; -} - -static void intel_enable_fbc(struct drm_crtc *crtc) -{ - struct intel_fbc_work *work; - struct drm_device *dev = crtc->dev; - struct drm_i915_private *dev_priv = dev->dev_private; - - if (!dev_priv->display.enable_fbc) - return; - - intel_cancel_fbc_work(dev_priv); - - work = kzalloc(sizeof(*work), GFP_KERNEL); - if (work == NULL) { - DRM_ERROR("Failed to allocate FBC work structure\n"); - dev_priv->display.enable_fbc(crtc); - return; - } - - work->crtc = crtc; - work->fb = crtc->primary->fb; - INIT_DELAYED_WORK(&work->work, intel_fbc_work_fn); - - dev_priv->fbc.fbc_work = work; - - /* Delay the actual enabling to let pageflipping cease and the - * display to settle before starting the compression. Note that - * this delay also serves a second purpose: it allows for a - * vblank to pass after disabling the FBC before we attempt - * to modify the control registers. - * - * A more complicated solution would involve tracking vblanks - * following the termination of the page-flipping sequence - * and indeed performing the enable as a co-routine and not - * waiting synchronously upon the vblank. - * - * WaFbcWaitForVBlankBeforeEnable:ilk,snb - */ - schedule_delayed_work(&work->work, msecs_to_jiffies(50)); -} - -void intel_disable_fbc(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - - intel_cancel_fbc_work(dev_priv); - - if (!dev_priv->display.disable_fbc) - return; - - dev_priv->display.disable_fbc(dev); - dev_priv->fbc.plane = -1; -} - -static bool set_no_fbc_reason(struct drm_i915_private *dev_priv, - enum no_fbc_reason reason) -{ - if (dev_priv->fbc.no_fbc_reason == reason) - return false; - - dev_priv->fbc.no_fbc_reason = reason; - return true; -} - -/** - * intel_update_fbc - enable/disable FBC as needed - * @dev: the drm_device - * - * Set up the framebuffer compression hardware at mode set time. We - * enable it if possible: - * - plane A only (on pre-965) - * - no pixel mulitply/line duplication - * - no alpha buffer discard - * - no dual wide - * - framebuffer <= max_hdisplay in width, max_vdisplay in height - * - * We can't assume that any compression will take place (worst case), - * so the compressed buffer has to be the same size as the uncompressed - * one. It also must reside (along with the line length buffer) in - * stolen memory. - * - * We need to enable/disable FBC on a global basis. - */ -void intel_update_fbc(struct drm_device *dev) -{ - struct drm_i915_private *dev_priv = dev->dev_private; - struct drm_crtc *crtc = NULL, *tmp_crtc; - struct intel_crtc *intel_crtc; - struct drm_framebuffer *fb; - struct drm_i915_gem_object *obj; - const struct drm_display_mode *adjusted_mode; - unsigned int max_width, max_height; - - if (!HAS_FBC(dev)) { - set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED); - return; - } - - if (!i915.powersave) { - if (set_no_fbc_reason(dev_priv, FBC_MODULE_PARAM)) - DRM_DEBUG_KMS("fbc disabled per module param\n"); - return; - } - - /* - * If FBC is already on, we just have to verify that we can - * keep it that way... - * Need to disable if: - * - more than one pipe is active - * - changing FBC params (stride, fence, mode) - * - new fb is too large to fit in compressed buffer - * - going to an unsupported config (interlace, pixel multiply, etc.) - */ - for_each_crtc(dev, tmp_crtc) { - if (intel_crtc_active(tmp_crtc) && - to_intel_crtc(tmp_crtc)->primary_enabled) { - if (crtc) { - if (set_no_fbc_reason(dev_priv, FBC_MULTIPLE_PIPES)) - DRM_DEBUG_KMS("more than one pipe active, disabling compression\n"); - goto out_disable; - } - crtc = tmp_crtc; - } - } - - if (!crtc || crtc->primary->fb == NULL) { - if (set_no_fbc_reason(dev_priv, FBC_NO_OUTPUT)) - DRM_DEBUG_KMS("no output, disabling\n"); - goto out_disable; - } - - intel_crtc = to_intel_crtc(crtc); - fb = crtc->primary->fb; - obj = intel_fb_obj(fb); - adjusted_mode = &intel_crtc->config.adjusted_mode; - - if (i915.enable_fbc < 0) { - if (set_no_fbc_reason(dev_priv, FBC_CHIP_DEFAULT)) - DRM_DEBUG_KMS("disabled per chip default\n"); - goto out_disable; - } - if (!i915.enable_fbc) { - if (set_no_fbc_reason(dev_priv, FBC_MODULE_PARAM)) - DRM_DEBUG_KMS("fbc disabled per module param\n"); - goto out_disable; - } - if ((adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) || - (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)) { - if (set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED_MODE)) - DRM_DEBUG_KMS("mode incompatible with compression, " - "disabling\n"); - goto out_disable; - } - - if (INTEL_INFO(dev)->gen >= 8 || IS_HASWELL(dev)) { - max_width = 4096; - max_height = 4096; - } else if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) { - max_width = 4096; - max_height = 2048; - } else { - max_width = 2048; - max_height = 1536; - } - if (intel_crtc->config.pipe_src_w > max_width || - intel_crtc->config.pipe_src_h > max_height) { - if (set_no_fbc_reason(dev_priv, FBC_MODE_TOO_LARGE)) - DRM_DEBUG_KMS("mode too large for compression, disabling\n"); - goto out_disable; - } - if ((INTEL_INFO(dev)->gen < 4 || HAS_DDI(dev)) && - intel_crtc->plane != PLANE_A) { - if (set_no_fbc_reason(dev_priv, FBC_BAD_PLANE)) - DRM_DEBUG_KMS("plane not A, disabling compression\n"); - goto out_disable; - } - - /* The use of a CPU fence is mandatory in order to detect writes - * by the CPU to the scanout and trigger updates to the FBC. - */ - if (obj->tiling_mode != I915_TILING_X || - obj->fence_reg == I915_FENCE_REG_NONE) { - if (set_no_fbc_reason(dev_priv, FBC_NOT_TILED)) - DRM_DEBUG_KMS("framebuffer not tiled or fenced, disabling compression\n"); - goto out_disable; - } - if (INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev) && - to_intel_plane(crtc->primary)->rotation != BIT(DRM_ROTATE_0)) { - if (set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED_MODE)) - DRM_DEBUG_KMS("Rotation unsupported, disabling\n"); - goto out_disable; - } - - /* If the kernel debugger is active, always disable compression */ - if (in_dbg_master()) - goto out_disable; - - if (i915_gem_stolen_setup_compression(dev, obj->base.size, - drm_format_plane_cpp(fb->pixel_format, 0))) { - if (set_no_fbc_reason(dev_priv, FBC_STOLEN_TOO_SMALL)) - DRM_DEBUG_KMS("framebuffer too large, disabling compression\n"); - goto out_disable; - } - - /* If the scanout has not changed, don't modify the FBC settings. - * Note that we make the fundamental assumption that the fb->obj - * cannot be unpinned (and have its GTT offset and fence revoked) - * without first being decoupled from the scanout and FBC disabled. - */ - if (dev_priv->fbc.plane == intel_crtc->plane && - dev_priv->fbc.fb_id == fb->base.id && - dev_priv->fbc.y == crtc->y) - return; - - if (intel_fbc_enabled(dev)) { - /* We update FBC along two paths, after changing fb/crtc - * configuration (modeswitching) and after page-flipping - * finishes. For the latter, we know that not only did - * we disable the FBC at the start of the page-flip - * sequence, but also more than one vblank has passed. - * - * For the former case of modeswitching, it is possible - * to switch between two FBC valid configurations - * instantaneously so we do need to disable the FBC - * before we can modify its control registers. We also - * have to wait for the next vblank for that to take - * effect. However, since we delay enabling FBC we can - * assume that a vblank has passed since disabling and - * that we can safely alter the registers in the deferred - * callback. - * - * In the scenario that we go from a valid to invalid - * and then back to valid FBC configuration we have - * no strict enforcement that a vblank occurred since - * disabling the FBC. However, along all current pipe - * disabling paths we do need to wait for a vblank at - * some point. And we wait before enabling FBC anyway. - */ - DRM_DEBUG_KMS("disabling active FBC for update\n"); - intel_disable_fbc(dev); - } - - intel_enable_fbc(crtc); - dev_priv->fbc.no_fbc_reason = FBC_OK; - return; - -out_disable: - /* Multiple disables should be harmless */ - if (intel_fbc_enabled(dev)) { - DRM_DEBUG_KMS("unsupported config, disabling FBC\n"); - intel_disable_fbc(dev); - } - i915_gem_stolen_cleanup_compression(dev); -} static void i915_pineview_get_mem_freq(struct drm_device *dev) { @@ -6922,43 +6304,12 @@ void intel_suspend_hw(struct drm_device *dev) lpt_suspend_hw(dev); } -static void intel_init_fbc(struct drm_i915_private *dev_priv) -{ - if (!HAS_FBC(dev_priv)) { - dev_priv->fbc.enabled = false; - return; - } - - if (INTEL_INFO(dev_priv)->gen >= 7) { - dev_priv->display.fbc_enabled = ironlake_fbc_enabled; - dev_priv->display.enable_fbc = gen7_enable_fbc; - dev_priv->display.disable_fbc = ironlake_disable_fbc; - } else if (INTEL_INFO(dev_priv)->gen >= 5) { - dev_priv->display.fbc_enabled = ironlake_fbc_enabled; - dev_priv->display.enable_fbc = ironlake_enable_fbc; - dev_priv->display.disable_fbc = ironlake_disable_fbc; - } else if (IS_GM45(dev_priv)) { - dev_priv->display.fbc_enabled = g4x_fbc_enabled; - dev_priv->display.enable_fbc = g4x_enable_fbc; - dev_priv->display.disable_fbc = g4x_disable_fbc; - } else { - dev_priv->display.fbc_enabled = i8xx_fbc_enabled; - dev_priv->display.enable_fbc = i8xx_enable_fbc; - dev_priv->display.disable_fbc = i8xx_disable_fbc; - - /* This value was pulled out of someone's hat */ - I915_WRITE(FBC_CONTROL, 500 << FBC_CTL_INTERVAL_SHIFT); - } - - dev_priv->fbc.enabled = dev_priv->display.fbc_enabled(dev_priv->dev); -} - /* Set up chip specific power management-related functions */ void intel_init_pm(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; - intel_init_fbc(dev_priv); + intel_fbc_init(dev_priv); /* For cxsr */ if (IS_PINEVIEW(dev)) diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c index bc5834bba2ae..c18e57d36c2c 100644 --- a/drivers/gpu/drm/i915/intel_sprite.c +++ b/drivers/gpu/drm/i915/intel_sprite.c @@ -1004,7 +1004,7 @@ intel_post_enable_primary(struct drm_crtc *crtc) hsw_enable_ips(intel_crtc); mutex_lock(&dev->struct_mutex); - intel_update_fbc(dev); + intel_fbc_update(dev); mutex_unlock(&dev->struct_mutex); } @@ -1017,7 +1017,7 @@ intel_pre_disable_primary(struct drm_crtc *crtc) mutex_lock(&dev->struct_mutex); if (dev_priv->fbc.plane == intel_crtc->plane) - intel_disable_fbc(dev); + intel_fbc_disable(dev); mutex_unlock(&dev->struct_mutex); /* -- 2.20.1