- 11 Apr, 2018 1 commit
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Tvrtko Ursulin authored
While thinking about sporadic failures of perf_pmu/rc6-runtime-pm* tests on some CI machines I have concluded that: a) the PMU readout of RC6 can race against runtime PM transitions, and b) there are other reasons than being runtime suspended which can cause intel_runtime_pm_get_if_in_use to fail. Therefore when estimating RC6 the code needs to assert we are indeed in suspended state, and if not, the best we can do is return the last known RC6 value. Without this check we can calculate the estimated value based on un- initialized or inappropriate internal state, which can result in over- estimation, or in any case incorrect value being returned. v2: * Re-arrange the code a bit to avoid second unlock and return branch. (Chris Wilson) v3: * Insert some strategic blank lines and improve commit msg. (Chris Wilson) Signed-off-by:
Tvrtko Ursulin <tvrtko.ursulin@intel.com> Fixes: 1fe699e3 ("drm/i915/pmu: Fix sleep under atomic in RC6 readout") Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105010 Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Imre Deak <imre.deak@intel.com> Reviewed-by:
Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20180410112704.24462-1-tvrtko.ursulin@linux.intel.com
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- 10 Apr, 2018 5 commits
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Chris Wilson authored
%phn is not a valid specifier, and the trailing 'n' is being eaten by the format-specifier and defaulting to the ' ' separator. Avoid angering smatch by using the unknown specifier, and use the default we expect. drivers/gpu/drm/i915/intel_guc_ct.c:616 ctb_read() warn: '%ph' cannot be followed by 'n' drivers/gpu/drm/i915/intel_guc_ct.c:616 ctb_read() warn: '%ph' cannot be followed by 'n' drivers/gpu/drm/i915/intel_guc_ct.c:616 ctb_read() warn: '%ph' cannot be followed by 'n' drivers/gpu/drm/i915/intel_guc_ct.c:669 ct_handle_response() warn: '%ph' cannot be followed by 'n' drivers/gpu/drm/i915/intel_guc_ct.c:679 ct_handle_response() warn: '%ph' cannot be followed by 'n' drivers/gpu/drm/i915/intel_guc_ct.c:693 ct_handle_response() warn: '%ph' cannot be followed by 'n' drivers/gpu/drm/i915/intel_guc_ct.c:707 ct_handle_response() warn: '%ph' cannot be followed by 'n' drivers/gpu/drm/i915/intel_guc_ct.c:727 ct_process_request() warn: '%ph' cannot be followed by 'n' drivers/gpu/drm/i915/intel_guc_ct.c:803 ct_handle_request() warn: '%ph' cannot be followed by 'n' Signed-off-by:
Michal Wajdeczko <michal.wajdeczko@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180410111417.27563-1-chris@chris-wilson.co.uk
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Chris Wilson authored
Resetting the GPU doesn't affect the RPS/RC6 state, so we can stop forcibly reloading the registers. Ville suggested this many moons ago, I said at that time that sanitizing was no harm and meant that our bookkeeping was kept consistent with the HW. However, in a forthcoming series, we want to split rps/rc6 GT powermanagement and one of the key simplifications is the control of when we enable it. Performing a crude sanitize in the middle of i915_gem_reset() is then a huge wart. Suggested-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by:
Sagar Arun Kamble <sagar.a.kamble@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180410133354.13425-1-chris@chris-wilson.co.uk
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Maarten Lankhorst authored
Adding a i915_fifo_underrun_reset debugfs file will make it possible for IGT tests to clear FIFO underrun fallout at the start of each subtest, and make re-enable FBC so tests always have maximum exposure to features used by IGT. FIFO underruns and FBC bugs will no longer hide when an earlier subtests disables both. Signed-off-by:
Maarten Lankhorst <maarten.lankhorst@linux.intel.com> References: https://bugs.freedesktop.org/show_bug.cgi?id=105685 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105681 Link: https://patchwork.freedesktop.org/patch/msgid/20180328100526.36467-1-maarten.lankhorst@linux.intel.comAcked-by:
Jani Nikula <jani.nikula@linux.intel.com> [mlankhorst: Reset FBC reason if underrun had occurred. (vivijim)] Reviewed-by:
Rodrigo Vivi <rodrigo.vivi@intel.com>
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Chris Wilson authored
Inside the psr work function, we want to wait for PSR to idle first and wish to do so without blocking the normal modeset path, so we do so without holding the PSR lock. However, we first have to find which pipe PSR was enabled on, which requires chasing into the PSR struct and requires locking to prevent intel_psr_disable() from concurrently setting our pointer to NULL. Fixes: 995d3047 ("drm/i915: VLV/CHV PSR Software timer mode") Signed-off-by:
Jose Roberto de Souza <jose.souza@intel.com> Acked-by:
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Imre Deak authored
On GLK sporadic timeouts occur during PHY0 enabling. Based on logs it looks like they happen sometime after a system suspend/resume cycle, with the same power well enabling succeeding both before and after the failed one and no other problems observed. The current timeout in the code is not actually specified by BSpec, so let's try to increase that until a BSpec update. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105771Signed-off-by:
Imre Deak <imre.deak@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180409122716.4055-1-imre.deak@intel.comReviewed-by:
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- 09 Apr, 2018 19 commits
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Maarten Lankhorst authored
All the references to get_existing_state can be converted to get_new_state or get_old_state, which means that i915 is now get_existing_state free. Signed-off-by:
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Maarten Lankhorst authored
get_existing_crtc_state is currently unused, get rid of it. Signed-off-by:
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Maarten Lankhorst authored
The get_existing macros are deprecated and should be replaced by get_old/new_state for clarity. Signed-off-by:
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Tvrtko Ursulin authored
Include fence context and seqno in low level tracing so it is easier to follow flows of individual requests when things go bad. Also added tracing on the reset side of things. v2: Chris Wilson: * Standardize global_seqno and seqno as global. * Include current hws seqno in execlists_cancel_port_requests. v3: * Fix port printk format for all builds. Signed-off-by:
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Tvrtko Ursulin authored
Enclose for_each_engine_masked macro arguments in parentheses. v2: * Fixup whitespace to satisfy checkpatch. * Likewise reformat to 80 chars. Signed-off-by:
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Chandra Konduru authored
This patch updates scaler max limit support for NV12 v2: Rebased (me) v3: Rebased (me) v4: Missed the Tested-by/Reviewed-by in the previous series Adding the same to commit message in this version. v5: Addressed review comments from Ville and rebased - calculation of max_scale to be made less convoluted by splitting it up a bit - Indentation errors to be fixed in the series v6: Rebased (me) Fixed review comments from Paauwe, Bob J Previous version, where a split of calculation was done, was wrong. Fixed that issue here. v7: Rebased (me) v8: Rebased (me) v9: Rebased (me) v10: Rebased (me) v11: Addressed review comments from Shashank Sharma Alignment issues fixed. When call to skl_update_scaler is made, 0 was being sent instead of pixel_format. When crtc update scaler is called, we dont have the fb to derive the pixel format. Added the function parameter bool plane_scaler_check to account for this. v12: Fixed failure in IGT debugfs_test. fb is NULL in skl_update_scaler_plane Due to this, accessing fb->format caused failure. Patch checks fb before using. v13: In the previous version there was a flaw. In skl_update_scaler during plane_scaler_check if the format was non-NV12, it would set need_scaling to false. This could reset the previously set need_scaling from a previous condition check. Patch fixes this. Patch also adds minimum src height for YUV 420 formats to 16 (as defined in BSpec) and adds for checking this range. v14: Addressed review comments from Maarten Just add a check for NV12 min src height in skl_update_scaler and retain the remaining checks as is. Added Reviewed By from Juha-Pekka Heikkila. v15: Rebased the series. v16: Changed fb height restriction to be >= 16 as per Bspec. Earlier it was > 16. v17: Adding src width and height to be mult of 4 restriction to avoid pipe fifo underruns for NV12. Credits-to: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Tested-by:
Clinton Taylor <clinton.a.taylor@intel.com> Reviewed-by:
Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com> Signed-off-by:
Chandra Konduru <chandra.konduru@intel.com> Signed-off-by:
Nabendu Maiti <nabendu.bikash.maiti@intel.com> Signed-off-by:
Vidya Srinivas <vidya.srinivas@intel.com> Reviewed-by:
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Chandra Konduru authored
This patch adds NV12 to format_is_yuv() function for sprite planes. v2: -Use intel_ prefix for format_is_yuv (Ville) v3: Rebased (me) v4: Rebased and addressed review comments from Clinton A Taylor. "static function in intel_sprite.c is not available to the primary plane functions". Changed commit message - function modified for sprite planes. v5: Missed the Tested-by/Reviewed-by in the previous series Adding the same to commit message in this version. v6: Rebased (me) v7: Rebased (me) v8: Rebased (me) v9: Rebased (me) v10: Changed intel_format_is_yuv function from static to non-static. We need to use it later from other files for check. v11: Rebased the patch. format_is_yuv has already been renamed to intel_format_is_yuv in the color patch series which is already merged. This function which was previously static has already been made non-static. So this patch after rebase just adds NV12 to intel_format_is_yuv function. v12: Added reviewed by from Juha-Pekka Heikkila v13/v14/v15: Rebased the series Tested-by:
Shashank Sharma <shashank.sharma@intel.com> Signed-off-by:
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Chandra Konduru authored
This patch sets appropriate scaler mode for NV12 format. In this mode, skylake scaler does either chroma-upsampling or chroma-upsampling and resolution scaling v2: Review comments from Ville addressed NV12 case to be checked first for setting the scaler v3: Rebased (me) v4: Rebased (me) v5: Missed the Tested-by/Reviewed-by in the previous series Adding the same to commit message in this version. v6: Rebased (me) v7: Rebased (me) v8: Rebased (me) Restricting the NV12 change for scaler to BXT and KBL in this series. v9: Rebased (me) v10: As of now, NV12 has been tested on Gen9 and Gen10. However, code is applicable to all GEN >= 9. Hence making that change to keep it generic. Comments under v8 is not valid anymore. v11: Addressed review comments by Shashank Sharma. For Gen10+, the scaler mode to be set it planar or normal (single bit). Changed the code to be applicable to all Gen. v12: Addressed review comments from Shashank Sharma For Gen9 (apart from GLK) bits 28:29 to be programmed in PS_CTRL for NV12. For GLK and Gen10+, bit 29 to be set for all Planar. v13: Addressed review comments from Juha-Pekka Heikkila "NV12 not to be supported by SKL" Adding Reviewed by tag from Shashank Shamr v14: Added reviewed by from Juha-Pekka Heikkila v15: Rebased the series Tested-by:
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Vidya Srinivas authored
If the fb format is YUV, enable the plane CSC mode bits for the conversion. v2: Addressed review comments from Shashank Sharma Alignment issue fixed in i915_reg.h v3: Adding Reviewed By from Shashank Sharma v4: Rebased the patch. As part of rebasing, re-using the color series defines which are already merged. plane_state->base.color_encoding might not be set for NV12. For now, just using PLANE_COLOR_CSC_MODE_YUV709_TO_RGB709 in glk_plane_color_ctl if format is NV12. v5: Added reviewed by from Juha-Pekka Heikkila v6: Rebased the series Reviewed-by:
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Vidya Srinivas authored
Display WA 827 applies to GEN9 (excluede GLK) and CNL. Switching the plane format from NV12 to RGB and leaving system idle results in display underrun and corruption. WA: Set the bit 15 & bit 19 to 1b in the CLKGATE_DIS_PSL register for the pipe in which NV12 plane is enabled. v2: Addressed review comments from Maarten and Juha-Pekka Heikkila. Added reviewed by from Juha-Pekka Heikkila. v3: Rebased the series Reviewed-by:
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Mahesh Kumar authored
This patch splits skl_compute_wm/ddb functions into two parts. One adds all affected pipes after the commit to atomic_state structure and second part does compute the DDB. v2: Added reviewed by tag from Shashank Sharma v3: Added reviewed by from Juha-Pekka Heikkila v4: Rebased the series v5: Fixed checkpatch error. Changed *changed = true to (*changed) = true; Reviewed-by:
Mahesh Kumar <mahesh1.kumar@intel.com> Signed-off-by:
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Mahesh Kumar authored
Display Workaround #0826 (SKL:ALL BXT:ALL) & #1059(CNL:A) Hardware sometimes fails to wake memory from pkg C states fetching the last few lines of planar YUV 420 (NV12) planes. This causes intermittent underflow and corruption. WA: Disable package C states or do not enable latency levels 1 through 7 (WM1 - WM7) on NV12 planes. v2: Addressed review comments by Maarten. v3: Adding reviewed by tag from Shashank Sharma v4: Added reviewed by from Juha-Pekka Heikkila v5: Rebased the series Reviewed-by:
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Mahesh Kumar authored
DDB allocation optimization algorithm requires/assumes ddb allocation for any memory C-state level DDB value to be as high as level below the current level. Render decompression requires level WM to be as high as wm level-0. This patch fulfils both the requirements. v2: Changed plane_num to plane_id in skl_compute_wm_levels v3: Addressed review comments from Shashank Sharma Changed the commit message "statement can be more clear, "DDB value to be as high as level below " what is level below ?" v4: Added reviewed by tag from Shashank Sharma v5: Added reviewed by from Juha-Pekka Heikkila v6: Rebased the series Reviewed-by:
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Mahesh Kumar authored
This patch passes skl_wm_level structure itself to watermark computation function skl_compute_plane_wm function (instead of its internal parameters). It reduces number of arguments required to be passed. v2: Addressed review comments by Shashank Sharma v3: Adding reviewed by tag from Shashank Sharma v4: Added reviewed by from Juha-Pekka Heikkila v5: Rebased the series Reviewed-by:
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Mahesh Kumar authored
NV12 requires WM calculation for UV plane as well. UV plane WM should also fulfill all the WM related restrictions. v2: Addressed review comments from Shashank Sharma. v3: Addressed review comments from Shashank Sharma Changed plane_num to plane_id in skl_compute_plane_wm_params and skl_compute_plane_wm. Adding reviewed by tag from Shashank Sharma v4: Added reviewed by from Juha-Pekka Heikkila v5: Rebased the series Reviewed-by:
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Mahesh Kumar authored
For YUV 420 Planar formats like NV12, buffer allocation is done for Y and UV surfaces separately. For NV12 plane formats, the UV buffer allocation must be programmed in the Plane Buffer Config register and the Y buffer allocation must be programmed in the Plane NV12 Buffer Config register. Both register values should be verified during verify_wm_state. v2: Addressed review comments by Maarten. v3: Addressed review comments by Shashank Sharma. v4: Adding reviewed by tag from Shashank Sharma v5: Added reviewed by from Juha-Pekka Heikkila v6: Rebased the series Reviewed-by:
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Mahesh Kumar authored
Add support of recognizing DRM_FORMAT_NV12 from plane_format register value. v2: Added reviewed by tag from Mika Kahola v3: Added reviewed by from Juha-Pekka Heikkila v4: Rebased the series Reviewed-by:
Mika Kahola <mika.kahola@intel.com> Reviewed-by:
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Mahesh Kumar authored
Current code calculates DDB for planar formats in such a way that we store DDB of plane-0 in plane 1 & vice-versa. In order to make this clean this patch refactors WM/DDB calculation for NV12 planar formats. v2: Addressed review comments by Maarten v3: Rebased and addressed review comments by Maarten v4: Fixed a compilation issue of string replacement is_nv12 to is_planar v5: Added reviewed by from Juha-Pekka Heikkila v6: Rebased the series Reviewed-by:
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Mahesh Kumar authored
skl_wm_values struct contains values of pipe/plane DDB only. so rename it for better readability of code. Similarly skl_copy_wm_for_pipe copies DDB values. s/skl_wm_values/skl_ddb_values s/skl_copy_wm_for_pipe/skl_copy_ddb_for_pipe Changes since V1: - also change name of skl_copy_wm_for_pipe v2: Added reviewed by from Juha-Pekka Heikkila v3: Rebased the series Reviewed-by:
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- 07 Apr, 2018 1 commit
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Lyude Paul authored
When doing a modeset where the sink is transitioning from D3 to D0 , it would sometimes be possible for the initial power_up_phy() to start timing out. This would only be observed in the last action before the sink went into D3 mode was intel_dp_sink_dpms(DRM_MODE_DPMS_OFF). We originally thought this might be an issue with us accidentally shutting off the aux block when putting the sink into D3, but since the DP spec mandates that sinks must wake up within 1ms while we have 100ms to respond to an ESI irq, this didn't really add up. Turns out that the problem is more subtle then that: It turns out that the timeout is from us not enabling DPMS on the MST hub before actually trying to initiate sideband communications. This would cause the first sideband communication (power_up_phy()), to start timing out because the sink wasn't ready to respond. Afterwards, we would call intel_dp_sink_dpms(DRM_MODE_DPMS_ON) in intel_ddi_pre_enable_dp(), which would actually result in waking up the sink so that sideband requests would work again. Since DPMS is what lets us actually bring the hub up into a state where sideband communications become functional again, we just need to make sure to enable DPMS on the display before attempting to perform sideband communications. Changes since v1: - Remove comment above if (!intel_dp->is_mst) - vsryjala - Move intel_dp_sink_dpms() for MST into intel_dp_post_disable_mst() to keep enable/disable paths symmetrical - Improve commit message - dhnkrn Changes since v2: - Only send DPMS off when we're disabling the last sink, and only send DPMS on when we're enabling the first sink - dhnkrn Changes since v3: - Check against is_mst, not intel_dp->is_mst - dhnkrn/vsyrjala Signed-off-by:
Lyude Paul <lyude@redhat.com> Reviewed-by:
Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> Reviewed-by:
Laura Abbott <labbott@redhat.com> Cc: stable@vger.kernel.org Fixes: ad260ab3 ("drm/i915/dp: Write to SET_POWER dpcd to enable MST hub.") Link: https://patchwork.freedesktop.org/patch/msgid/20180407011053.22437-1-lyude@redhat.com
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- 06 Apr, 2018 14 commits
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Chris Wilson authored
Currently, we rely on inspecting the hangcheck state from within the i915_reset() routines to determine which engines were guilty of the hang. This is problematic for cases where we want to run i915_handle_error() and call i915_reset() independently of hangcheck. Instead of relying on the indirect parameter passing, turn it into an explicit parameter providing the set of stalled engines which then are treated as guilty until proven innocent. While we are removing the implicit stalled parameter, also make the reason into an explicit parameter to i915_reset(). We still need a back-channel for i915_handle_error() to hand over the task to the locked waiter, but let's keep that its own channel rather than incriminate another. This leaves stalled/seqno as being private to hangcheck, with no more nefarious snooping by reset, be it whole-device or per-engine. \o/ The only real issue now is that this makes it crystal clear that we don't actually do any testing of hangcheck per se in drv_selftest/live_hangcheck, merely of resets! Signed-off-by:
Michel Thierry <michel.thierry@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180406220354.18911-2-chris@chris-wilson.co.uk
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Chris Wilson authored
If we are resetting just one engine, we know it has stalled. So we can pass the stalled parameter directly to i915_gem_reset_engine(), which alleviates the necessity to poke at the generic engine->hangcheck.stalled magic variable, leaving that under control of hangcheck as its name implies. Other than simplifying by removing the indirect parameter along this path, this allows us to introduce new reset mechanisms that run independently of hangcheck. Signed-off-by:
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Chris Wilson authored
We will want to park GEM before disengaging the drive^W^W^W unwedging. Since we already do the work for idling, expose the guts as a new function that we can then reuse. v2: Just skip if already parked; makes it more forgiving to use by future callers. v3: Extract mark_busy, rename it to i915_gem_unpark and place it next to i915_gem_park so that we can evaluate it for symmetry more easily. Calling GEM from inside i915_request looks to be a bit of a layering violation, for the moment I am imaging them as being notify_cb. Signed-off-by:
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Chris Wilson authored
Tvrtko mentioned that wait_for_hang() was confusing as it does not actually wait for the aforementioned hang, just until the request is running and we are *ready* to inject a hang. A quick s/wait_for_hang/wait_until_running/ removes that confusion without having to rethink the naming scheme, immediately at least. Suggested-by:
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Oscar Mateo authored
AFAICT, once the new interrupt is in place, the rest should behave the same as Gen10. v2: Update ring frequencies (Sagar) v3: Rebase. Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Cc: Sagar Arun Kamble <sagar.a.kamble@intel.com> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> Signed-off-by:
Oscar Mateo <oscar.mateo@intel.com> Reviewed-by:
Mika Kuoppala <mika.kuoppala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180405140052.10682-5-mika.kuoppala@linux.intel.com
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Oscar Mateo authored
BSpec says: "Second level interrupt events are stored in the GT INT DW. GT INT DW is a double buffered structure. A snapshot of events is taken when SW reads GT INT DW. From the time of read to the time of SW completely clearing GT INT DW (to indicate end of service), all incoming interrupts are logged in a secondary storage structure. this guarantees that the record of interrupts SW is servicing will not change while under service". We read GT INT DW in several places now: - The IRQ handler (banks 0 and 1) where, hopefully, it is completely cleared (operation now covered with the irq lock). - The 'reset' interrupts functions for RPS and GuC logs, where we clear the bit we are interested in and leave the others for the normal interrupt handler. - The 'enable' interrupts functions for RPS and GuC logs, as a measure of precaution. Here we could relax a bit and don't check GT INT DW at all or, if we do, at least we should clear the offending bit (which is what this patch does). Note that, if every bit is cleared on reading GT INT DW, the register won't be locked. Also note that, according to the BSpec, GT INT DW cannot be cleared without first servicing the Selector & Shared IIR registers. v2: - Remove some code duplication (Tvrtko) - Make sure GT_INTR_DW are protected by the irq spinlock, since it's a global resource (Tvrtko) v3: Optimize the spinlock (Tvrtko) v4: Rebase. v5: - take spinlock on outer scope to please sparse (Mika) - use raw_reg accessors (Mika) v6: omit the continue in looping banks (Michel) Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Cc: Sagar Arun Kamble <sagar.a.kamble@intel.com> Signed-off-by: -
Oscar Mateo authored
Using the new hierarchical interrupt infrastructure. v2: Rebase v3: Rebase v4: use class/instance handler (Mika) Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Cc: Sagar Arun Kamble <sagar.a.kamble@intel.com> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> Signed-off-by:
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Mika Kuoppala authored
Interrupt identity register we already read from hardware contains engine class and instance fields. Leverage these fields to find correct engine to handle the interrupt. v3: rebase on top of rps intr use correct class / instance limits (Michel) v4: split engine/other handling v5: empty iir is not err (Daniele, Michel) Suggested-by:Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Cc: Michel Thierry <michel.thierry@intel.com> Signed-off-by:
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Michel Thierry authored
The bits used to reset the different engines/domains have changed in GEN11, this patch maps the reset engine mask bits with the new bits in the reset control register. v2: Use shift-left instead of BIT macro to match the file style (Paulo). v3: Reuse gen8_reset_engines (Daniele). v4: Do not call intel_uncore_forcewake_reset after reset, we may be using the forcewake to read protected registers elsewhere and those results may be clobbered by the concurrent dropping of forcewake. bspec: 19212 Cc: Oscar Mateo <oscar.mateo@intel.com> Cc: Antonio Argenziano <antonio.argenziano@intel.com> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com> Acked-by:
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Kevin Rogovin authored
Now that "DOC: User command execution" of i915_gem_execbuffer.c is included in the i915.rst, it is benecifial (for new developers) to read what happens at the bottom of the driver stack (in terms of bytes written to be read by the GPU) when processing a user-space batchbuffer. v5: Typo correction of lacking double tick. Signed-off-by:
Kevin Rogovin <kevin.rogovin@intel.com> Reviewed-by:
Joonas Lahtinen <joonas.lahtinen@linux.intel.com> [Joonas: correcting the patch title] Signed-off-by:
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Kevin Rogovin authored
Add the documentation of "DOC: User command execution" of i915_gem_execbuffer.c into a new section in i915.rst. Signed-off-by:
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Kevin Rogovin authored
Add a narration to i915.rst about Intel GEN GPU's: engines, driver context and relocation. Also do minor reorder to improve narration. v5: More type fixes. Flow bullet list so lines are not too long. Signed-off-by:
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Chris Wilson authored
We don't handle resetting the kernel context very well, or presumably any context executing its breadcrumb commands in the ring as opposed to the batchbuffer and flush. If we trigger a device reset twice in quick succession while the kernel context is executing, we may end up skipping the breadcrumb. This is really only a problem for the selftest as normally there is a large interlude between resets (hangcheck), or we focus on resetting just one engine and so avoid repeatedly resetting innocents. Something to try would be a preempt-to-idle to quiesce the engine before reset, so that innocent contexts would be spared the reset. Signed-off-by:
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Gaurav K Singh authored
On Apollolake, with stress test warm reboot, audio card was not getting enumerated after reboot. This was a spurious issue happening on Apollolake. HW codec and HD audio controller link was going out of sync for which there was a fix in i915 driver but was not getting invoked for BXT. Extending this fix to BXT as well. Tested on apollolake chromebook by stress test warm reboot with 2500 iterations. Bspec: 21829 Signed-off-by:
Gaurav K Singh <gaurav.k.singh@intel.com> Reviewed-by:
Jani Nikula <jani.nikula@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/1522946544-11524-1-git-send-email-gaurav.k.singh@intel.com
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