From 62f90b38f3326206ea53f7cf4ea4616028419d60 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Fri, 15 Jul 2016 21:48:07 +0200 Subject: drm/i915: Update missing kerneldoc Not sure why so much slips through when 0day is catching these. Hopefully the much faster sphinx toolchain helps in unlazying people. Acked-by: Chris Wilson Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/1468612088-9721-10-git-send-email-daniel.vetter@ffwll.ch --- drivers/gpu/drm/i915/intel_fbc.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers/gpu/drm/i915/intel_fbc.c') diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c index 6a7ad3ed1463..781e2f5f7cd8 100644 --- a/drivers/gpu/drm/i915/intel_fbc.c +++ b/drivers/gpu/drm/i915/intel_fbc.c @@ -1075,6 +1075,8 @@ out: /** * intel_fbc_enable: tries to enable FBC on the CRTC * @crtc: the CRTC + * @crtc_state: corresponding &drm_crtc_state for @crtc + * @plane_state: corresponding &drm_plane_state for the primary plane of @crtc * * This function checks if the given CRTC was chosen for FBC, then enables it if * possible. Notice that it doesn't activate FBC. It is valid to call -- cgit v1.2.1 From 4da456168f41499369bef5ebb33d5966cd9cbb8c Mon Sep 17 00:00:00 2001 From: Matthew Auld Date: Tue, 5 Jul 2016 10:28:34 +0100 Subject: drm/i915: remove redundant fbc warnings The fbc enabled/active sanity checks are already done in __intel_fbc_disable so no need to do them again. Signed-off-by: Matthew Auld Reviewed-by: Paulo Zanoni Signed-off-by: Joonas Lahtinen Link: http://patchwork.freedesktop.org/patch/msgid/1467710914-15146-1-git-send-email-matthew.auld@intel.com --- drivers/gpu/drm/i915/intel_fbc.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) (limited to 'drivers/gpu/drm/i915/intel_fbc.c') diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c index 781e2f5f7cd8..8147eb9e8475 100644 --- a/drivers/gpu/drm/i915/intel_fbc.c +++ b/drivers/gpu/drm/i915/intel_fbc.c @@ -1165,11 +1165,8 @@ void intel_fbc_disable(struct intel_crtc *crtc) return; mutex_lock(&fbc->lock); - if (fbc->crtc == crtc) { - WARN_ON(!fbc->enabled); - WARN_ON(fbc->active); + if (fbc->crtc == crtc) __intel_fbc_disable(dev_priv); - } mutex_unlock(&fbc->lock); cancel_work_sync(&fbc->work.work); -- cgit v1.2.1 From 36dbc4d76918d7557b686f807106dcc799174b12 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Thu, 4 Aug 2016 08:43:53 +0100 Subject: drm/i915/fbc: FBC causes display flicker when VT-d is enabled on Skylake MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Erratum SKL075: Display Flicker May Occur When Both VT-d And FBC Are Enabled "Display flickering may occur when both FBC (Frame Buffer Compression) and VT - d (Intel® Virtualization Technology for Directed I/O) are enabled and in use by the display controller." Ville found the w/a name in the database: WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt and also dug out that it affects Broxton. v2: Log when the quirk is applied. v3: Ensure i915.enable_fbc is false when !HAS_FBC() v4: Fix function name after rebase v5: Add Broxton to the workaround Note for backporting to stable, we need to add #define mkwrite_device_info(ptr) \ ((struct intel_device_info *)INTEL_INFO(ptr)) Signed-off-by: Chris Wilson Cc: Paulo Zanoni Cc: Ville Syrjälä Reviewed-by: Ville Syrjälä Cc: stable@vger.kernel.org Link: http://patchwork.freedesktop.org/patch/msgid/1470296633-20388-1-git-send-email-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/intel_fbc.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'drivers/gpu/drm/i915/intel_fbc.c') diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c index 8147eb9e8475..d4be07615aa9 100644 --- a/drivers/gpu/drm/i915/intel_fbc.c +++ b/drivers/gpu/drm/i915/intel_fbc.c @@ -1229,12 +1229,29 @@ static int intel_sanitize_fbc_option(struct drm_i915_private *dev_priv) if (i915.enable_fbc >= 0) return !!i915.enable_fbc; + if (!HAS_FBC(dev_priv)) + return 0; + if (IS_BROADWELL(dev_priv)) return 1; return 0; } +static bool need_fbc_vtd_wa(struct drm_i915_private *dev_priv) +{ +#ifdef CONFIG_INTEL_IOMMU + /* WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt */ + if (intel_iommu_gfx_mapped && + (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv))) { + DRM_INFO("Disabling framebuffer compression (FBC) to prevent screen flicker with VT-d enabled\n"); + return true; + } +#endif + + return false; +} + /** * intel_fbc_init - Initialize FBC * @dev_priv: the i915 device @@ -1252,6 +1269,9 @@ void intel_fbc_init(struct drm_i915_private *dev_priv) fbc->active = false; fbc->work.scheduled = false; + if (need_fbc_vtd_wa(dev_priv)) + mkwrite_device_info(dev_priv)->has_fbc = false; + i915.enable_fbc = intel_sanitize_fbc_option(dev_priv); DRM_DEBUG_KMS("Sanitized enable_fbc value: %d\n", i915.enable_fbc); -- cgit v1.2.1 From 3e510a8e65ef6d1cf45c18bf79c8f91ec481f154 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Fri, 5 Aug 2016 10:14:23 +0100 Subject: drm/i915: Repack fence tiling mode and stride into a single integer In the previous commit, we moved the obj->tiling_mode out of a bitfield and into its own integer so that we could safely use READ_ONCE(). Let us now repair some of that damage by sharing the tiling_mode with its companion, the fence stride. v2: New magic Signed-off-by: Chris Wilson Reviewed-by: Joonas Lahtinen Link: http://patchwork.freedesktop.org/patch/msgid/1470388464-28458-18-git-send-email-chris@chris-wilson.co.uk --- drivers/gpu/drm/i915/intel_fbc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/gpu/drm/i915/intel_fbc.c') diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c index d4be07615aa9..85adc2b92594 100644 --- a/drivers/gpu/drm/i915/intel_fbc.c +++ b/drivers/gpu/drm/i915/intel_fbc.c @@ -741,7 +741,7 @@ static void intel_fbc_update_state_cache(struct intel_crtc *crtc, cache->fb.pixel_format = fb->pixel_format; cache->fb.stride = fb->pitches[0]; cache->fb.fence_reg = obj->fence_reg; - cache->fb.tiling_mode = obj->tiling_mode; + cache->fb.tiling_mode = i915_gem_object_get_tiling(obj); } static bool intel_fbc_can_activate(struct intel_crtc *crtc) -- cgit v1.2.1