From bed4a6734b5f56ffd240fdda755b6eb589d32482 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Sat, 11 Sep 2010 10:47:47 +0100 Subject: [PATCH] drm/i915: Fix updating FBC We need to track different state on each generation in order to detect when we need to refresh the FBC registers. Signed-off-by: Chris Wilson --- drivers/gpu/drm/i915/i915_debugfs.c | 3 + drivers/gpu/drm/i915/i915_drv.h | 3 + drivers/gpu/drm/i915/intel_display.c | 152 +++++++++++++++------------ 3 files changed, 90 insertions(+), 68 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c index 3d882b70af16..fb5c2a621907 100644 --- a/drivers/gpu/drm/i915/i915_debugfs.c +++ b/drivers/gpu/drm/i915/i915_debugfs.c @@ -719,6 +719,9 @@ static int i915_fbc_status(struct seq_file *m, void *unused) } else { seq_printf(m, "FBC disabled: "); switch (dev_priv->no_fbc_reason) { + case FBC_NO_OUTPUT: + seq_printf(m, "no outputs"); + break; case FBC_STOLEN_TOO_SMALL: seq_printf(m, "not enough stolen memory"); break; diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index c8b22005ec18..b3efb30b2270 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -219,6 +219,7 @@ struct intel_device_info { }; enum no_fbc_reason { + FBC_NO_OUTPUT, /* no outputs enabled to compress */ FBC_STOLEN_TOO_SMALL, /* not enough space to hold compressed buffers */ FBC_UNSUPPORTED_MODE, /* interlace or doublescanned mode */ FBC_MODE_TOO_LARGE, /* mode too large for compression */ @@ -307,8 +308,10 @@ typedef struct drm_i915_private { unsigned long cfb_size; unsigned long cfb_pitch; + unsigned long cfb_offset; int cfb_fence; int cfb_plane; + int cfb_y; int irq_enabled; diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index c6b8292c0708..f48e944423cb 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1047,7 +1047,6 @@ void intel_wait_for_vblank_off(struct drm_device *dev, int pipe) DRM_DEBUG_KMS("vblank wait timed out\n"); } -/* Parameters have changed, update FBC info */ static void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval) { struct drm_device *dev = crtc->dev; @@ -1059,6 +1058,14 @@ static void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval) int plane, i; u32 fbc_ctl, fbc_ctl2; + if (fb->pitch == dev_priv->cfb_pitch && + obj_priv->fence_reg == dev_priv->cfb_fence && + intel_crtc->plane == dev_priv->cfb_plane && + I915_READ(FBC_CONTROL) & FBC_CTL_EN) + return; + + i8xx_disable_fbc(dev); + dev_priv->cfb_pitch = dev_priv->cfb_size / FBC_LL_SIZE; if (fb->pitch < dev_priv->cfb_pitch) @@ -1100,12 +1107,6 @@ void i8xx_disable_fbc(struct drm_device *dev) struct drm_i915_private *dev_priv = dev->dev_private; u32 fbc_ctl; - if (!I915_HAS_FBC(dev)) - return; - - if (!(I915_READ(FBC_CONTROL) & FBC_CTL_EN)) - return; /* Already off, just return */ - /* Disable compression */ fbc_ctl = I915_READ(FBC_CONTROL); fbc_ctl &= ~FBC_CTL_EN; @@ -1140,9 +1141,23 @@ static void g4x_enable_fbc(struct drm_crtc *crtc, unsigned long interval) unsigned long stall_watermark = 200; u32 dpfc_ctl; + dpfc_ctl = I915_READ(DPFC_CONTROL); + if (dpfc_ctl & DPFC_CTL_EN) { + if (dev_priv->cfb_pitch == dev_priv->cfb_pitch / 64 - 1 && + dev_priv->cfb_fence == obj_priv->fence_reg && + dev_priv->cfb_plane == intel_crtc->plane && + dev_priv->cfb_y == crtc->y) + return; + + I915_WRITE(DPFC_CONTROL, dpfc_ctl & ~DPFC_CTL_EN); + POSTING_READ(DPFC_CONTROL); + intel_wait_for_vblank(dev, intel_crtc->pipe); + } + dev_priv->cfb_pitch = (dev_priv->cfb_pitch / 64) - 1; dev_priv->cfb_fence = obj_priv->fence_reg; dev_priv->cfb_plane = intel_crtc->plane; + dev_priv->cfb_y = crtc->y; dpfc_ctl = plane | DPFC_SR_EN | DPFC_CTL_LIMIT_1X; if (obj_priv->tiling_mode != I915_TILING_NONE) { @@ -1152,7 +1167,6 @@ static void g4x_enable_fbc(struct drm_crtc *crtc, unsigned long interval) I915_WRITE(DPFC_CHICKEN, ~DPFC_HT_MODIFY); } - I915_WRITE(DPFC_CONTROL, dpfc_ctl); I915_WRITE(DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN | (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) | (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT)); @@ -1171,10 +1185,12 @@ void g4x_disable_fbc(struct drm_device *dev) /* Disable compression */ dpfc_ctl = I915_READ(DPFC_CONTROL); - dpfc_ctl &= ~DPFC_CTL_EN; - I915_WRITE(DPFC_CONTROL, dpfc_ctl); + if (dpfc_ctl & DPFC_CTL_EN) { + dpfc_ctl &= ~DPFC_CTL_EN; + I915_WRITE(DPFC_CONTROL, dpfc_ctl); - DRM_DEBUG_KMS("disabled FBC\n"); + DRM_DEBUG_KMS("disabled FBC\n"); + } } static bool g4x_fbc_enabled(struct drm_device *dev) @@ -1197,11 +1213,26 @@ static void ironlake_enable_fbc(struct drm_crtc *crtc, unsigned long interval) unsigned long stall_watermark = 200; u32 dpfc_ctl; + dpfc_ctl = I915_READ(ILK_DPFC_CONTROL); + if (dpfc_ctl & DPFC_CTL_EN) { + if (dev_priv->cfb_pitch == dev_priv->cfb_pitch / 64 - 1 && + dev_priv->cfb_fence == obj_priv->fence_reg && + dev_priv->cfb_plane == intel_crtc->plane && + dev_priv->cfb_offset == obj_priv->gtt_offset && + dev_priv->cfb_y == crtc->y) + return; + + I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl & ~DPFC_CTL_EN); + POSTING_READ(ILK_DPFC_CONTROL); + intel_wait_for_vblank(dev, intel_crtc->pipe); + } + dev_priv->cfb_pitch = (dev_priv->cfb_pitch / 64) - 1; dev_priv->cfb_fence = obj_priv->fence_reg; dev_priv->cfb_plane = intel_crtc->plane; + dev_priv->cfb_offset = obj_priv->gtt_offset; + dev_priv->cfb_y = crtc->y; - dpfc_ctl = I915_READ(ILK_DPFC_CONTROL); dpfc_ctl &= DPFC_RESERVED; dpfc_ctl |= (plane | DPFC_CTL_LIMIT_1X); if (obj_priv->tiling_mode != I915_TILING_NONE) { @@ -1211,15 +1242,13 @@ static void ironlake_enable_fbc(struct drm_crtc *crtc, unsigned long interval) I915_WRITE(ILK_DPFC_CHICKEN, ~DPFC_HT_MODIFY); } - I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl); I915_WRITE(ILK_DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN | (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) | (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT)); I915_WRITE(ILK_DPFC_FENCE_YOFF, crtc->y); I915_WRITE(ILK_FBC_RT_BASE, obj_priv->gtt_offset | ILK_FBC_RT_VALID); /* enable it... */ - I915_WRITE(ILK_DPFC_CONTROL, I915_READ(ILK_DPFC_CONTROL) | - DPFC_CTL_EN); + I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN); DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane); } @@ -1231,10 +1260,12 @@ void ironlake_disable_fbc(struct drm_device *dev) /* Disable compression */ dpfc_ctl = I915_READ(ILK_DPFC_CONTROL); - dpfc_ctl &= ~DPFC_CTL_EN; - I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl); + if (dpfc_ctl & DPFC_CTL_EN) { + dpfc_ctl &= ~DPFC_CTL_EN; + I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl); - DRM_DEBUG_KMS("disabled FBC\n"); + DRM_DEBUG_KMS("disabled FBC\n"); + } } static bool ironlake_fbc_enabled(struct drm_device *dev) @@ -1276,8 +1307,7 @@ void intel_disable_fbc(struct drm_device *dev) /** * intel_update_fbc - enable/disable FBC as needed - * @crtc: CRTC to point the compressor at - * @mode: mode in use + * @dev: the drm_device * * Set up the framebuffer compression hardware at mode set time. We * enable it if possible: @@ -1294,18 +1324,14 @@ void intel_disable_fbc(struct drm_device *dev) * * We need to enable/disable FBC on a global basis. */ -static void intel_update_fbc(struct drm_crtc *crtc, - struct drm_display_mode *mode) +static void intel_update_fbc(struct drm_device *dev) { - struct drm_device *dev = crtc->dev; struct drm_i915_private *dev_priv = dev->dev_private; - struct drm_framebuffer *fb = crtc->fb; + struct drm_crtc *crtc = NULL, *tmp_crtc; + struct intel_crtc *intel_crtc; + struct drm_framebuffer *fb; struct intel_framebuffer *intel_fb; struct drm_i915_gem_object *obj_priv; - struct drm_crtc *tmp_crtc; - struct intel_crtc *intel_crtc = to_intel_crtc(crtc); - int plane = intel_crtc->plane; - int crtcs_enabled = 0; DRM_DEBUG_KMS("\n"); @@ -1315,12 +1341,6 @@ static void intel_update_fbc(struct drm_crtc *crtc, if (!I915_HAS_FBC(dev)) return; - if (!crtc->fb) - return; - - intel_fb = to_intel_framebuffer(fb); - obj_priv = to_intel_bo(intel_fb->obj); - /* * If FBC is already on, we just have to verify that we can * keep it that way... @@ -1331,35 +1351,47 @@ static void intel_update_fbc(struct drm_crtc *crtc, * - going to an unsupported config (interlace, pixel multiply, etc.) */ list_for_each_entry(tmp_crtc, &dev->mode_config.crtc_list, head) { - if (tmp_crtc->enabled) - crtcs_enabled++; + if (tmp_crtc->enabled) { + if (crtc) { + DRM_DEBUG_KMS("more than one pipe active, disabling compression\n"); + dev_priv->no_fbc_reason = FBC_MULTIPLE_PIPES; + goto out_disable; + } + crtc = tmp_crtc; + } } - DRM_DEBUG_KMS("%d pipes active\n", crtcs_enabled); - if (crtcs_enabled > 1) { - DRM_DEBUG_KMS("more than one pipe active, disabling compression\n"); - dev_priv->no_fbc_reason = FBC_MULTIPLE_PIPES; + + if (!crtc || crtc->fb == NULL) { + DRM_DEBUG_KMS("no output, disabling\n"); + dev_priv->no_fbc_reason = FBC_NO_OUTPUT; goto out_disable; } + + intel_crtc = to_intel_crtc(crtc); + fb = crtc->fb; + intel_fb = to_intel_framebuffer(fb); + obj_priv = to_intel_bo(intel_fb->obj); + if (intel_fb->obj->size > dev_priv->cfb_size) { DRM_DEBUG_KMS("framebuffer too large, disabling " "compression\n"); dev_priv->no_fbc_reason = FBC_STOLEN_TOO_SMALL; goto out_disable; } - if ((mode->flags & DRM_MODE_FLAG_INTERLACE) || - (mode->flags & DRM_MODE_FLAG_DBLSCAN)) { + if ((crtc->mode.flags & DRM_MODE_FLAG_INTERLACE) || + (crtc->mode.flags & DRM_MODE_FLAG_DBLSCAN)) { DRM_DEBUG_KMS("mode incompatible with compression, " "disabling\n"); dev_priv->no_fbc_reason = FBC_UNSUPPORTED_MODE; goto out_disable; } - if ((mode->hdisplay > 2048) || - (mode->vdisplay > 1536)) { + if ((crtc->mode.hdisplay > 2048) || + (crtc->mode.vdisplay > 1536)) { DRM_DEBUG_KMS("mode too large for compression, disabling\n"); dev_priv->no_fbc_reason = FBC_MODE_TOO_LARGE; goto out_disable; } - if ((IS_I915GM(dev) || IS_I945GM(dev)) && plane != 0) { + if ((IS_I915GM(dev) || IS_I945GM(dev)) && intel_crtc->plane != 0) { DRM_DEBUG_KMS("plane not 0, disabling compression\n"); dev_priv->no_fbc_reason = FBC_BAD_PLANE; goto out_disable; @@ -1374,18 +1406,7 @@ static void intel_update_fbc(struct drm_crtc *crtc, if (in_dbg_master()) goto out_disable; - if (intel_fbc_enabled(dev)) { - /* We can re-enable it in this case, but need to update pitch */ - if ((fb->pitch > dev_priv->cfb_pitch) || - (obj_priv->fence_reg != dev_priv->cfb_fence) || - (plane != dev_priv->cfb_plane)) - intel_disable_fbc(dev); - } - - /* Now try to turn it back on if possible */ - if (!intel_fbc_enabled(dev)) - intel_enable_fbc(crtc, 500); - + intel_enable_fbc(crtc, 500); return; out_disable: @@ -1527,10 +1548,7 @@ intel_pipe_set_base_atomic(struct drm_crtc *crtc, struct drm_framebuffer *fb, } POSTING_READ(dspbase); - if (IS_I965G(dev) || plane == 0) - intel_update_fbc(crtc, &crtc->mode); - - intel_wait_for_vblank(dev, intel_crtc->pipe); + intel_update_fbc(dev); intel_increase_pllclock(crtc); return 0; @@ -2093,8 +2111,7 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc) DRM_ERROR("failed to enable transcoder\n"); intel_crtc_load_lut(crtc); - - intel_update_fbc(crtc, &crtc->mode); + intel_update_fbc(dev); } static void ironlake_crtc_disable(struct drm_crtc *crtc) @@ -2336,9 +2353,7 @@ static void i9xx_crtc_enable(struct drm_crtc *crtc) } intel_crtc_load_lut(crtc); - - if ((IS_I965G(dev) || plane == 0)) - intel_update_fbc(crtc, &crtc->mode); + intel_update_fbc(dev); /* Give the overlay scaler a chance to enable if it's on this pipe */ intel_crtc_dpms_overlay(intel_crtc, true); @@ -2473,9 +2488,9 @@ static void intel_crtc_dpms(struct drm_crtc *crtc, int mode) dev_priv->display.dpms(crtc, mode); - if (mode == DRM_MODE_DPMS_ON) + if (mode == DRM_MODE_DPMS_ON) { intel_crtc_update_cursor(crtc); - else { + } else { /* XXX Note that this is not a complete solution, but a hack * to avoid the most frequently hit hang. */ @@ -2483,6 +2498,7 @@ static void intel_crtc_dpms(struct drm_crtc *crtc, int mode) intel_update_watermarks(dev); } + intel_update_fbc(dev); if (!dev->primary->master) return; -- 2.20.1