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linux/drivers/gpu/drm/i915/i915_params.c

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drm/i915: move module parameters into a struct, in a new file With 20+ module parameters, I think referring to them via a struct improves clarity over just having a bunch of globals. While at it, move the parameter initialization and definitions into a new file i915_params.c to reduce clutter in i915_drv.c. Apart from the ill-named i915_enable_rc6, i915_enable_fbc and i915_enable_ppgtt parameters, for which we lose the "i915_" prefix internally, the module parameters now look the same both on the kernel command line and in code. For example, "i915.modeset". The downsides of the change are losing static on a couple of variables and not having the initialization and module_param_named() right next to each other. On the other hand, all module parameters are now defined in one place at i915_params.c. Plus you can do this to find all module parameter references: $ git grep "i915\." -- drivers/gpu/drm/i915 v2: - move the definitions into a new file - s/i915_params/i915/ - make i915_try_reset i915.reset, for consistency Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-01-21 09:24:25 +00:00
/*
* 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, sub license, 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 "i915_drv.h"
struct i915_params i915 __read_mostly = {
.modeset = -1,
.panel_ignore_lid = 1,
.semaphores = -1,
.lvds_downclock = 0,
.lvds_channel_mode = 0,
.panel_use_ssc = -1,
.vbt_sdvo_panel_type = -1,
.enable_rc6 = -1,
.enable_fbc = -1,
drm/i915/bdw: Enable execlists by default where supported Execlist support in the i915 driver is now considered good enough for the feature to be enabled by default on Gen8 and later and routinely tested. Adjusted i915 parameters structure initialization to reflect this and updated the comment in intel_sanitize_enable_execlists(). There's still work to do before we can let the wider massive onto it, but there's still time left before the 3.20 cutoff. v2: Update the MODULE_PARM_DESC too. Issue: VIZ-2020 Signed-off-by: Thomas Daniel <thomas.daniel@intel.com> [danvet: Add note that there's still some work left to do.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-12-11 12:48:35 +00:00
.enable_execlists = -1,
drm/i915: move module parameters into a struct, in a new file With 20+ module parameters, I think referring to them via a struct improves clarity over just having a bunch of globals. While at it, move the parameter initialization and definitions into a new file i915_params.c to reduce clutter in i915_drv.c. Apart from the ill-named i915_enable_rc6, i915_enable_fbc and i915_enable_ppgtt parameters, for which we lose the "i915_" prefix internally, the module parameters now look the same both on the kernel command line and in code. For example, "i915.modeset". The downsides of the change are losing static on a couple of variables and not having the initialization and module_param_named() right next to each other. On the other hand, all module parameters are now defined in one place at i915_params.c. Plus you can do this to find all module parameter references: $ git grep "i915\." -- drivers/gpu/drm/i915 v2: - move the definitions into a new file - s/i915_params/i915/ - make i915_try_reset i915.reset, for consistency Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-01-21 09:24:25 +00:00
.enable_hangcheck = true,
.enable_ppgtt = -1,
Revert "drm/i915: Enable PSR by default." This reverts commit b6d547791fd3ef4ccc89ad2556ab01045640aef7. The panel self refresh clearly isn't stable yet, and causes my laptop (Haswell ULT in a Sony Vaio Pro) to have the screen lock up. Maybe it doesn't ever get out of self-refresh, or maybe there are gremlins in the machine that get unhappy. Regardless, it's broken, and it gets reverted. Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-08-08 21:48:26 +00:00
.enable_psr = 0,
drm/i915: move module parameters into a struct, in a new file With 20+ module parameters, I think referring to them via a struct improves clarity over just having a bunch of globals. While at it, move the parameter initialization and definitions into a new file i915_params.c to reduce clutter in i915_drv.c. Apart from the ill-named i915_enable_rc6, i915_enable_fbc and i915_enable_ppgtt parameters, for which we lose the "i915_" prefix internally, the module parameters now look the same both on the kernel command line and in code. For example, "i915.modeset". The downsides of the change are losing static on a couple of variables and not having the initialization and module_param_named() right next to each other. On the other hand, all module parameters are now defined in one place at i915_params.c. Plus you can do this to find all module parameter references: $ git grep "i915\." -- drivers/gpu/drm/i915 v2: - move the definitions into a new file - s/i915_params/i915/ - make i915_try_reset i915.reset, for consistency Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-01-21 09:24:25 +00:00
.preliminary_hw_support = IS_ENABLED(CONFIG_DRM_I915_PRELIMINARY_HW_SUPPORT),
.disable_power_well = 1,
.enable_ips = 1,
.fastboot = 0,
.prefault_disable = 0,
drm/i915: Add module param to test the load detect code This is useful for writing igts to make sure we don't break this, without being forced to own a one of these dinosaurs. Suggested-by: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: Matt Roper <matthew.d.roper@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-03-03 17:03:47 +00:00
.load_detect_test = 0,
drm/i915: move module parameters into a struct, in a new file With 20+ module parameters, I think referring to them via a struct improves clarity over just having a bunch of globals. While at it, move the parameter initialization and definitions into a new file i915_params.c to reduce clutter in i915_drv.c. Apart from the ill-named i915_enable_rc6, i915_enable_fbc and i915_enable_ppgtt parameters, for which we lose the "i915_" prefix internally, the module parameters now look the same both on the kernel command line and in code. For example, "i915.modeset". The downsides of the change are losing static on a couple of variables and not having the initialization and module_param_named() right next to each other. On the other hand, all module parameters are now defined in one place at i915_params.c. Plus you can do this to find all module parameter references: $ git grep "i915\." -- drivers/gpu/drm/i915 v2: - move the definitions into a new file - s/i915_params/i915/ - make i915_try_reset i915.reset, for consistency Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-01-21 09:24:25 +00:00
.reset = true,
.invert_brightness = 0,
drm/i915: Provide a command line option to disable display If we can't actually determine at run-time we have a fused-off display, provide at least an option to disable it. v2: Move the i915.disable_display test in a separate check (Daniel Vetter) Signed-off-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-02-10 17:20:55 +00:00
.disable_display = 0,
drm/i915: Enable command parsing by default v2: rebased OTC-Tracker: AXIA-4631 Change-Id: I6747457e1fe7494bd42787af51198fcba398ad78 Signed-off-by: Brad Volkin <bradley.d.volkin@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> [danvet: Resolve tiny conflict in module option text.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-02-18 18:15:57 +00:00
.enable_cmd_parser = 1,
drm/i915: Add debug module option for VTd validation VTd has a few too many "outright disable the damn thing" workarounds accumulated and for validation we want a simple knob to make sure we disable them all. Since this is for bdw+ validation and atm we don't have any workarounds for bdw this option currently does nothing. So currently this is just a placeholder to make sure reality will match with the documented process for our validation people. v2: Fix up param description (Jani). v3: Actually git add ... Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: David Woodhouse <dwmw2@infradead.org> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-04-01 07:33:47 +00:00
.disable_vtd_wa = 0,
drm/i915: Replaced Blitter ring based flips with MMIO flips This patch enables the framework for using MMIO based flip calls, in contrast with the CS based flip calls which are being used currently. MMIO based flip calls can be enabled on architectures where Render and Blitter engines reside in different power wells. The decision to use MMIO flips can be made based on workloads to give 100% residency for Media power well. v2: The MMIO flips now use the interrupt driven mechanism for issuing the flips when target seqno is reached. (Incorporating Ville's idea) v3: Rebasing on latest code. Code restructuring after incorporating Damien's comments v4: Addressing Ville's review comments -general cleanup -updating only base addr instead of calling update_primary_plane -extending patch for gen5+ platforms v5: Addressed Ville's review comments -Making mmio flip vs cs flip selection based on module parameter -Adding check for DRIVER_MODESET feature in notify_ring before calling notify mmio flip. -Other changes mostly in function arguments v6: -Having a seperate function to check condition for using mmio flips (Ville) -propogating error code from i915_gem_check_olr (Ville) v7: -Adding __must_check with i915_gem_check_olr (Chris) -Renaming mmio_flip_data to mmio_flip (Chris) -Rebasing on latest nightly v8: -Rebasing on latest code -squash 3rd patch in series(mmio setbase vs page flip race) with this patch -Added new tiling mode update in intel_do_mmio_flip (Chris) v9: -check for obj->last_write_seqno being 0 instead of obj->ring being NULL in intel_postpone_flip, as this is a more restrictive condition (Chris) v10: -Applied Chris's suggestions for squashing patches 2,3 into this patch. These patches make the selection of CS vs MMIO flip at the page flip time, and make the module parameter for using mmio flips as tristate, the states being 'force CS flips', 'force mmio flips', 'driver discretion'. Changed the logic for driver discretion (Chris) v11: Minor code cleanup(better readability, fixing whitespace errors, using lockdep to check mutex locked status in postpone_flip, removal of __must_check in function definition) (Chris) Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Sourab Gupta <sourab.gupta@intel.com> Signed-off-by: Akash Goel <akash.goel@intel.com> Tested-by: Chris Wilson <chris@chris-wilson.co.uk> # snb, ivb [danvet: Fix up parameter alignement checkpatch spotted.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-06-02 11:17:17 +00:00
.use_mmio_flip = 0,
drm/i915: reorganize the unclaimed register detection code The current code only runs when we do an I915_WRITE operation. It checks if the unclaimed register flag is set before we do the operation, and then it checks it again after we do the operation. This double check allows us to find out if the I915_WRITE operation in question is the bad one, or if some previous code is the bad one. When it finds a problem, our code uses DRM_ERROR to signal it. The good thing about the current code is that it detects the problem, so at least we can know we did something wrong. The problem is that even though we find the problem, we don't really have much information to actually debug it. So whenever I see one of these DRM_ERROR messages on my systems, the first thing I do is apply a patch to change the DRM_ERROR to a WARN and also check for unclaimed registers on I915_READ operations. This local patch makes things even slower, but it usually helps a lot in finding the bad code. The first point here is that since the current code is only useful to detect whether we have a problem or not, but it is not really good to find the cause of the problem, I don't think we should be checking both before and after every I915_WRITE operation: just doing the check once should be enough for us to quickly detect problems. With this change, the code that runs by default for every single user will only do 1 read operation for every single I915_WRITE, instead of 2. This patch does this change. The second point is that the local patch I have should be upstream, but since it makes things slower it should be disabled by default. So I added the i915.mmio_debug option to enable it. So after this patch, this is what will happen: - By default, we will try to detect unclaimed registers once after every I915_WRITE operation. Previously we tried twice for every I915_WRITE. - When we find an unclaimed register we will still print a DRM_ERROR message, but we will now tell the user to try again with i915.mmio_debug=1. - When we use i915.mmio_debug=1 we will try to find unclaimed registers both before and after every I915_READ and I915_WRITE operation, and we will print stack traces in case we find them. This should really help locating the exact point of the bad code (or at least finding out that i915.ko is not the problem). This commit also opens space for really-slow register debugging operations on other platforms. In theory we can now add lots and lots of debug code behind i915.mmio_debug, enable this option on our tests, and catch more problems. v2: - Remove not-so-useful comments (Daniel) - Fix the param definition macros (Rodrigo) Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com> Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-07-16 20:49:29 +00:00
.mmio_debug = 0,
drm/i915: tame the chattermouth (v2) Many distro's have mechanism in place to collect and automatically file bugs for failed WARN()s. And since i915 has a lot of hw state sanity checks which result in WARN(), it generates quite a lot of noise which is somewhat disconcerting to the end user. Separate out the internal hw-is-in-the-state-I-expected checks into I915_STATE_WARN()s and allow configuration via i915.verbose_checks module param about whether this will generate a full blown stacktrace or just DRM_ERROR(). The new moduleparam defaults to true, so by default there is no change in behavior. And even when disabled, you will still get an error message logged. v2: paint the macro names blue, clarify that the default behavior remains the same as before Signed-off-by: Rob Clark <robdclark@gmail.com> Acked-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-12-15 18:56:32 +00:00
.verbose_state_checks = 1,
drm/i915: Add i915.nuclear_pageflip command line param to force atomic (v4) We don't have full atomic modeset support yet, but the "nuclear pageflip" subset of functionality (i.e., plane operations only) should be ready. Allow the user to force atomic on for debug purposes, or for fixed-purpose embedded devices that will only use atomic for plane updates. The term 'nuclear' is used here instead of 'atomic' to make it clear that this doesn't allow full atomic modeset support, just a (very useful) subset of the atomic functionality. We'll drop the kernel parameter and unconditionally enable atomic in a future patch once all of the necessary pieces are in. v2: - Use module_param_named_unsafe() (Daniel) - Simplify comment on DRIVER_ATOMIC guard (Daniel) v3: - Make the parameter "nuclear_pageflip" rather than just "nuclear" for clarity. (Ander) v4: - Make the internal variable "nuclear_pageflip" as well as the command-line option. (Ander) Signed-off-by: Matt Roper <matthew.d.roper@intel.com> Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-01-23 00:53:12 +00:00
.nuclear_pageflip = 0,
drm/i915: move module parameters into a struct, in a new file With 20+ module parameters, I think referring to them via a struct improves clarity over just having a bunch of globals. While at it, move the parameter initialization and definitions into a new file i915_params.c to reduce clutter in i915_drv.c. Apart from the ill-named i915_enable_rc6, i915_enable_fbc and i915_enable_ppgtt parameters, for which we lose the "i915_" prefix internally, the module parameters now look the same both on the kernel command line and in code. For example, "i915.modeset". The downsides of the change are losing static on a couple of variables and not having the initialization and module_param_named() right next to each other. On the other hand, all module parameters are now defined in one place at i915_params.c. Plus you can do this to find all module parameter references: $ git grep "i915\." -- drivers/gpu/drm/i915 v2: - move the definitions into a new file - s/i915_params/i915/ - make i915_try_reset i915.reset, for consistency Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-01-21 09:24:25 +00:00
};
module_param_named(modeset, i915.modeset, int, 0400);
MODULE_PARM_DESC(modeset,
"Use kernel modesetting [KMS] (0=DRM_I915_KMS from .config, "
"1=on, -1=force vga console preference [default])");
module_param_named(panel_ignore_lid, i915.panel_ignore_lid, int, 0600);
MODULE_PARM_DESC(panel_ignore_lid,
"Override lid status (0=autodetect, 1=autodetect disabled [default], "
"-1=force lid closed, -2=force lid open)");
drm/i915: taint the kernel if unsafe module parameters are set Taint the kernel if the semaphores, enable_rc6, enable_fbc, or ppgtt module parameters are modified. These module parameters are for debugging and testing only, and should never be changed from their platform specific default values by the users. We do not provide support for people enabling all the experimental features. Make this clear by tainting the kernel if the parameters are set. Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2014-08-26 20:54:23 +00:00
module_param_named_unsafe(semaphores, i915.semaphores, int, 0400);
drm/i915: move module parameters into a struct, in a new file With 20+ module parameters, I think referring to them via a struct improves clarity over just having a bunch of globals. While at it, move the parameter initialization and definitions into a new file i915_params.c to reduce clutter in i915_drv.c. Apart from the ill-named i915_enable_rc6, i915_enable_fbc and i915_enable_ppgtt parameters, for which we lose the "i915_" prefix internally, the module parameters now look the same both on the kernel command line and in code. For example, "i915.modeset". The downsides of the change are losing static on a couple of variables and not having the initialization and module_param_named() right next to each other. On the other hand, all module parameters are now defined in one place at i915_params.c. Plus you can do this to find all module parameter references: $ git grep "i915\." -- drivers/gpu/drm/i915 v2: - move the definitions into a new file - s/i915_params/i915/ - make i915_try_reset i915.reset, for consistency Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-01-21 09:24:25 +00:00
MODULE_PARM_DESC(semaphores,
"Use semaphores for inter-ring sync "
"(default: -1 (use per-chip defaults))");
drm/i915: taint the kernel if unsafe module parameters are set Taint the kernel if the semaphores, enable_rc6, enable_fbc, or ppgtt module parameters are modified. These module parameters are for debugging and testing only, and should never be changed from their platform specific default values by the users. We do not provide support for people enabling all the experimental features. Make this clear by tainting the kernel if the parameters are set. Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2014-08-26 20:54:23 +00:00
module_param_named_unsafe(enable_rc6, i915.enable_rc6, int, 0400);
drm/i915: drop i915_ prefix from enable_rc6, enable_fbc, enable_ppgtt parameters Having to use i915.i915_foo is inconsistent and a bit on the verbose side. Drop the prefix per Daniel's request, who also says this is not ABI we need to maintain. Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-01-27 13:26:38 +00:00
MODULE_PARM_DESC(enable_rc6,
drm/i915: move module parameters into a struct, in a new file With 20+ module parameters, I think referring to them via a struct improves clarity over just having a bunch of globals. While at it, move the parameter initialization and definitions into a new file i915_params.c to reduce clutter in i915_drv.c. Apart from the ill-named i915_enable_rc6, i915_enable_fbc and i915_enable_ppgtt parameters, for which we lose the "i915_" prefix internally, the module parameters now look the same both on the kernel command line and in code. For example, "i915.modeset". The downsides of the change are losing static on a couple of variables and not having the initialization and module_param_named() right next to each other. On the other hand, all module parameters are now defined in one place at i915_params.c. Plus you can do this to find all module parameter references: $ git grep "i915\." -- drivers/gpu/drm/i915 v2: - move the definitions into a new file - s/i915_params/i915/ - make i915_try_reset i915.reset, for consistency Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-01-21 09:24:25 +00:00
"Enable power-saving render C-state 6. "
"Different stages can be selected via bitmask values "
"(0 = disable; 1 = enable rc6; 2 = enable deep rc6; 4 = enable deepest rc6). "
"For example, 3 would enable rc6 and deep rc6, and 7 would enable everything. "
"default: -1 (use per-chip default)");
drm/i915: taint the kernel if unsafe module parameters are set Taint the kernel if the semaphores, enable_rc6, enable_fbc, or ppgtt module parameters are modified. These module parameters are for debugging and testing only, and should never be changed from their platform specific default values by the users. We do not provide support for people enabling all the experimental features. Make this clear by tainting the kernel if the parameters are set. Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2014-08-26 20:54:23 +00:00
module_param_named_unsafe(enable_fbc, i915.enable_fbc, int, 0600);
drm/i915: drop i915_ prefix from enable_rc6, enable_fbc, enable_ppgtt parameters Having to use i915.i915_foo is inconsistent and a bit on the verbose side. Drop the prefix per Daniel's request, who also says this is not ABI we need to maintain. Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-01-27 13:26:38 +00:00
MODULE_PARM_DESC(enable_fbc,
drm/i915: move module parameters into a struct, in a new file With 20+ module parameters, I think referring to them via a struct improves clarity over just having a bunch of globals. While at it, move the parameter initialization and definitions into a new file i915_params.c to reduce clutter in i915_drv.c. Apart from the ill-named i915_enable_rc6, i915_enable_fbc and i915_enable_ppgtt parameters, for which we lose the "i915_" prefix internally, the module parameters now look the same both on the kernel command line and in code. For example, "i915.modeset". The downsides of the change are losing static on a couple of variables and not having the initialization and module_param_named() right next to each other. On the other hand, all module parameters are now defined in one place at i915_params.c. Plus you can do this to find all module parameter references: $ git grep "i915\." -- drivers/gpu/drm/i915 v2: - move the definitions into a new file - s/i915_params/i915/ - make i915_try_reset i915.reset, for consistency Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-01-21 09:24:25 +00:00
"Enable frame buffer compression for power savings "
"(default: -1 (use per-chip default))");
module_param_named(lvds_downclock, i915.lvds_downclock, int, 0400);
MODULE_PARM_DESC(lvds_downclock,
"Use panel (LVDS/eDP) downclocking for power savings "
"(default: false)");
module_param_named(lvds_channel_mode, i915.lvds_channel_mode, int, 0600);
MODULE_PARM_DESC(lvds_channel_mode,
"Specify LVDS channel mode "
"(0=probe BIOS [default], 1=single-channel, 2=dual-channel)");
module_param_named(lvds_use_ssc, i915.panel_use_ssc, int, 0600);
MODULE_PARM_DESC(lvds_use_ssc,
"Use Spread Spectrum Clock with panels [LVDS/eDP] "
"(default: auto from VBT)");
module_param_named(vbt_sdvo_panel_type, i915.vbt_sdvo_panel_type, int, 0600);
MODULE_PARM_DESC(vbt_sdvo_panel_type,
"Override/Ignore selection of SDVO panel mode in the VBT "
"(-2=ignore, -1=auto [default], index in VBT BIOS table)");
module_param_named(reset, i915.reset, bool, 0600);
MODULE_PARM_DESC(reset, "Attempt GPU resets (default: true)");
module_param_named(enable_hangcheck, i915.enable_hangcheck, bool, 0644);
MODULE_PARM_DESC(enable_hangcheck,
"Periodically check GPU activity for detecting hangs. "
"WARNING: Disabling this can cause system wide hangs. "
"(default: true)");
drm/i915: taint the kernel if unsafe module parameters are set Taint the kernel if the semaphores, enable_rc6, enable_fbc, or ppgtt module parameters are modified. These module parameters are for debugging and testing only, and should never be changed from their platform specific default values by the users. We do not provide support for people enabling all the experimental features. Make this clear by tainting the kernel if the parameters are set. Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2014-08-26 20:54:23 +00:00
module_param_named_unsafe(enable_ppgtt, i915.enable_ppgtt, int, 0400);
drm/i915: drop i915_ prefix from enable_rc6, enable_fbc, enable_ppgtt parameters Having to use i915.i915_foo is inconsistent and a bit on the verbose side. Drop the prefix per Daniel's request, who also says this is not ABI we need to maintain. Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-01-27 13:26:38 +00:00
MODULE_PARM_DESC(enable_ppgtt,
drm/i915: move module parameters into a struct, in a new file With 20+ module parameters, I think referring to them via a struct improves clarity over just having a bunch of globals. While at it, move the parameter initialization and definitions into a new file i915_params.c to reduce clutter in i915_drv.c. Apart from the ill-named i915_enable_rc6, i915_enable_fbc and i915_enable_ppgtt parameters, for which we lose the "i915_" prefix internally, the module parameters now look the same both on the kernel command line and in code. For example, "i915.modeset". The downsides of the change are losing static on a couple of variables and not having the initialization and module_param_named() right next to each other. On the other hand, all module parameters are now defined in one place at i915_params.c. Plus you can do this to find all module parameter references: $ git grep "i915\." -- drivers/gpu/drm/i915 v2: - move the definitions into a new file - s/i915_params/i915/ - make i915_try_reset i915.reset, for consistency Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-01-21 09:24:25 +00:00
"Override PPGTT usage. "
"(-1=auto [default], 0=disabled, 1=aliasing, 2=full)");
drm/i915/bdw: Macro for LRCs and module option for Execlists GEN8 brings an expansion of the HW contexts: "Logical Ring Contexts". These expanded contexts enable a number of new abilities, especially "Execlists". The macro is defined to off until we have things in place to hope to work. v2: Rename "advanced contexts" to the more correct "logical ring contexts". v3: Add a module parameter to enable execlists. Execlist are relatively new, and so it'd be wise to be able to switch back to ring submission to debug subtle problems that will inevitably arise. v4: Add an intel_enable_execlists function. v5: Sanitize early, as suggested by Daniel. Remove lrc_enabled. Signed-off-by: Ben Widawsky <ben@bwidawsk.net> (v1) Signed-off-by: Damien Lespiau <damien.lespiau@intel.com> (v3) Signed-off-by: Oscar Mateo <oscar.mateo@intel.com> (v2, v4 & v5) Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-07-24 16:04:11 +00:00
module_param_named(enable_execlists, i915.enable_execlists, int, 0400);
MODULE_PARM_DESC(enable_execlists,
"Override execlists usage. "
drm/i915/bdw: Enable execlists by default where supported Execlist support in the i915 driver is now considered good enough for the feature to be enabled by default on Gen8 and later and routinely tested. Adjusted i915 parameters structure initialization to reflect this and updated the comment in intel_sanitize_enable_execlists(). There's still work to do before we can let the wider massive onto it, but there's still time left before the 3.20 cutoff. v2: Update the MODULE_PARM_DESC too. Issue: VIZ-2020 Signed-off-by: Thomas Daniel <thomas.daniel@intel.com> [danvet: Add note that there's still some work left to do.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-12-11 12:48:35 +00:00
"(-1=auto [default], 0=disabled, 1=enabled)");
drm/i915/bdw: Macro for LRCs and module option for Execlists GEN8 brings an expansion of the HW contexts: "Logical Ring Contexts". These expanded contexts enable a number of new abilities, especially "Execlists". The macro is defined to off until we have things in place to hope to work. v2: Rename "advanced contexts" to the more correct "logical ring contexts". v3: Add a module parameter to enable execlists. Execlist are relatively new, and so it'd be wise to be able to switch back to ring submission to debug subtle problems that will inevitably arise. v4: Add an intel_enable_execlists function. v5: Sanitize early, as suggested by Daniel. Remove lrc_enabled. Signed-off-by: Ben Widawsky <ben@bwidawsk.net> (v1) Signed-off-by: Damien Lespiau <damien.lespiau@intel.com> (v3) Signed-off-by: Oscar Mateo <oscar.mateo@intel.com> (v2, v4 & v5) Reviewed-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-07-24 16:04:11 +00:00
drm/i915: move module parameters into a struct, in a new file With 20+ module parameters, I think referring to them via a struct improves clarity over just having a bunch of globals. While at it, move the parameter initialization and definitions into a new file i915_params.c to reduce clutter in i915_drv.c. Apart from the ill-named i915_enable_rc6, i915_enable_fbc and i915_enable_ppgtt parameters, for which we lose the "i915_" prefix internally, the module parameters now look the same both on the kernel command line and in code. For example, "i915.modeset". The downsides of the change are losing static on a couple of variables and not having the initialization and module_param_named() right next to each other. On the other hand, all module parameters are now defined in one place at i915_params.c. Plus you can do this to find all module parameter references: $ git grep "i915\." -- drivers/gpu/drm/i915 v2: - move the definitions into a new file - s/i915_params/i915/ - make i915_try_reset i915.reset, for consistency Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-01-21 09:24:25 +00:00
module_param_named(enable_psr, i915.enable_psr, int, 0600);
Revert "drm/i915: Enable PSR by default." This reverts commit b6d547791fd3ef4ccc89ad2556ab01045640aef7. The panel self refresh clearly isn't stable yet, and causes my laptop (Haswell ULT in a Sony Vaio Pro) to have the screen lock up. Maybe it doesn't ever get out of self-refresh, or maybe there are gremlins in the machine that get unhappy. Regardless, it's broken, and it gets reverted. Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-08-08 21:48:26 +00:00
MODULE_PARM_DESC(enable_psr, "Enable PSR (default: false)");
drm/i915: move module parameters into a struct, in a new file With 20+ module parameters, I think referring to them via a struct improves clarity over just having a bunch of globals. While at it, move the parameter initialization and definitions into a new file i915_params.c to reduce clutter in i915_drv.c. Apart from the ill-named i915_enable_rc6, i915_enable_fbc and i915_enable_ppgtt parameters, for which we lose the "i915_" prefix internally, the module parameters now look the same both on the kernel command line and in code. For example, "i915.modeset". The downsides of the change are losing static on a couple of variables and not having the initialization and module_param_named() right next to each other. On the other hand, all module parameters are now defined in one place at i915_params.c. Plus you can do this to find all module parameter references: $ git grep "i915\." -- drivers/gpu/drm/i915 v2: - move the definitions into a new file - s/i915_params/i915/ - make i915_try_reset i915.reset, for consistency Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-01-21 09:24:25 +00:00
module_param_named(preliminary_hw_support, i915.preliminary_hw_support, int, 0600);
MODULE_PARM_DESC(preliminary_hw_support,
"Enable preliminary hardware support.");
module_param_named(disable_power_well, i915.disable_power_well, int, 0600);
MODULE_PARM_DESC(disable_power_well,
"Disable the power well when possible (default: true)");
module_param_named(enable_ips, i915.enable_ips, int, 0600);
MODULE_PARM_DESC(enable_ips, "Enable IPS (default: true)");
module_param_named(fastboot, i915.fastboot, bool, 0600);
MODULE_PARM_DESC(fastboot,
"Try to skip unnecessary mode sets at boot time (default: false)");
drm/i915: Add module param to test the load detect code This is useful for writing igts to make sure we don't break this, without being forced to own a one of these dinosaurs. Suggested-by: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: Matt Roper <matthew.d.roper@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-03-03 17:03:47 +00:00
module_param_named_unsafe(prefault_disable, i915.prefault_disable, bool, 0600);
drm/i915: move module parameters into a struct, in a new file With 20+ module parameters, I think referring to them via a struct improves clarity over just having a bunch of globals. While at it, move the parameter initialization and definitions into a new file i915_params.c to reduce clutter in i915_drv.c. Apart from the ill-named i915_enable_rc6, i915_enable_fbc and i915_enable_ppgtt parameters, for which we lose the "i915_" prefix internally, the module parameters now look the same both on the kernel command line and in code. For example, "i915.modeset". The downsides of the change are losing static on a couple of variables and not having the initialization and module_param_named() right next to each other. On the other hand, all module parameters are now defined in one place at i915_params.c. Plus you can do this to find all module parameter references: $ git grep "i915\." -- drivers/gpu/drm/i915 v2: - move the definitions into a new file - s/i915_params/i915/ - make i915_try_reset i915.reset, for consistency Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-01-21 09:24:25 +00:00
MODULE_PARM_DESC(prefault_disable,
"Disable page prefaulting for pread/pwrite/reloc (default:false). "
"For developers only.");
drm/i915: Add module param to test the load detect code This is useful for writing igts to make sure we don't break this, without being forced to own a one of these dinosaurs. Suggested-by: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: Matt Roper <matthew.d.roper@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-03-03 17:03:47 +00:00
module_param_named_unsafe(load_detect_test, i915.load_detect_test, bool, 0600);
MODULE_PARM_DESC(load_detect_test,
"Force-enable the VGA load detect code for testing (default:false). "
"For developers only.");
drm/i915: move module parameters into a struct, in a new file With 20+ module parameters, I think referring to them via a struct improves clarity over just having a bunch of globals. While at it, move the parameter initialization and definitions into a new file i915_params.c to reduce clutter in i915_drv.c. Apart from the ill-named i915_enable_rc6, i915_enable_fbc and i915_enable_ppgtt parameters, for which we lose the "i915_" prefix internally, the module parameters now look the same both on the kernel command line and in code. For example, "i915.modeset". The downsides of the change are losing static on a couple of variables and not having the initialization and module_param_named() right next to each other. On the other hand, all module parameters are now defined in one place at i915_params.c. Plus you can do this to find all module parameter references: $ git grep "i915\." -- drivers/gpu/drm/i915 v2: - move the definitions into a new file - s/i915_params/i915/ - make i915_try_reset i915.reset, for consistency Signed-off-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-01-21 09:24:25 +00:00
module_param_named(invert_brightness, i915.invert_brightness, int, 0600);
MODULE_PARM_DESC(invert_brightness,
"Invert backlight brightness "
"(-1 force normal, 0 machine defaults, 1 force inversion), please "
"report PCI device ID, subsystem vendor and subsystem device ID "
"to dri-devel@lists.freedesktop.org, if your machine needs it. "
"It will then be included in an upcoming module version.");
drm/i915: Provide a command line option to disable display If we can't actually determine at run-time we have a fused-off display, provide at least an option to disable it. v2: Move the i915.disable_display test in a separate check (Daniel Vetter) Signed-off-by: Damien Lespiau <damien.lespiau@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-02-10 17:20:55 +00:00
module_param_named(disable_display, i915.disable_display, bool, 0600);
MODULE_PARM_DESC(disable_display, "Disable display (default: false)");
drm/i915: Implement command buffer parsing logic The command parser scans batch buffers submitted via execbuffer ioctls before the driver submits them to hardware. At a high level, it looks for several things: 1) Commands which are explicitly defined as privileged or which should only be used by the kernel driver. The parser generally rejects such commands, with the provision that it may allow some from the drm master process. 2) Commands which access registers. To support correct/enhanced userspace functionality, particularly certain OpenGL extensions, the parser provides a whitelist of registers which userspace may safely access (for both normal and drm master processes). 3) Commands which access privileged memory (i.e. GGTT, HWS page, etc). The parser always rejects such commands. See the overview comment in the source for more details. This patch only implements the logic. Subsequent patches will build the tables that drive the parser. v2: Don't set the secure bit if the parser succeeds Fail harder during init Makefile cleanup Kerneldoc cleanup Clarify module param description Convert ints to bools in a few places Move client/subclient defs to i915_reg.h Remove the bits_count field OTC-Tracker: AXIA-4631 Change-Id: I50b98c71c6655893291c78a2d1b8954577b37a30 Signed-off-by: Brad Volkin <bradley.d.volkin@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> [danvet: Appease checkpatch.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-02-18 18:15:46 +00:00
drm/i915: Add debug module option for VTd validation VTd has a few too many "outright disable the damn thing" workarounds accumulated and for validation we want a simple knob to make sure we disable them all. Since this is for bdw+ validation and atm we don't have any workarounds for bdw this option currently does nothing. So currently this is just a placeholder to make sure reality will match with the documented process for our validation people. v2: Fix up param description (Jani). v3: Actually git add ... Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: David Woodhouse <dwmw2@infradead.org> Reviewed-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-04-01 07:33:47 +00:00
module_param_named(disable_vtd_wa, i915.disable_vtd_wa, bool, 0600);
MODULE_PARM_DESC(disable_vtd_wa, "Disable all VT-d workarounds (default: false)");
drm/i915: Implement command buffer parsing logic The command parser scans batch buffers submitted via execbuffer ioctls before the driver submits them to hardware. At a high level, it looks for several things: 1) Commands which are explicitly defined as privileged or which should only be used by the kernel driver. The parser generally rejects such commands, with the provision that it may allow some from the drm master process. 2) Commands which access registers. To support correct/enhanced userspace functionality, particularly certain OpenGL extensions, the parser provides a whitelist of registers which userspace may safely access (for both normal and drm master processes). 3) Commands which access privileged memory (i.e. GGTT, HWS page, etc). The parser always rejects such commands. See the overview comment in the source for more details. This patch only implements the logic. Subsequent patches will build the tables that drive the parser. v2: Don't set the secure bit if the parser succeeds Fail harder during init Makefile cleanup Kerneldoc cleanup Clarify module param description Convert ints to bools in a few places Move client/subclient defs to i915_reg.h Remove the bits_count field OTC-Tracker: AXIA-4631 Change-Id: I50b98c71c6655893291c78a2d1b8954577b37a30 Signed-off-by: Brad Volkin <bradley.d.volkin@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> [danvet: Appease checkpatch.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-02-18 18:15:46 +00:00
module_param_named(enable_cmd_parser, i915.enable_cmd_parser, int, 0600);
MODULE_PARM_DESC(enable_cmd_parser,
drm/i915: Enable command parsing by default v2: rebased OTC-Tracker: AXIA-4631 Change-Id: I6747457e1fe7494bd42787af51198fcba398ad78 Signed-off-by: Brad Volkin <bradley.d.volkin@intel.com> Reviewed-by: Jani Nikula <jani.nikula@intel.com> [danvet: Resolve tiny conflict in module option text.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-02-18 18:15:57 +00:00
"Enable command parsing (1=enabled [default], 0=disabled)");
drm/i915: Replaced Blitter ring based flips with MMIO flips This patch enables the framework for using MMIO based flip calls, in contrast with the CS based flip calls which are being used currently. MMIO based flip calls can be enabled on architectures where Render and Blitter engines reside in different power wells. The decision to use MMIO flips can be made based on workloads to give 100% residency for Media power well. v2: The MMIO flips now use the interrupt driven mechanism for issuing the flips when target seqno is reached. (Incorporating Ville's idea) v3: Rebasing on latest code. Code restructuring after incorporating Damien's comments v4: Addressing Ville's review comments -general cleanup -updating only base addr instead of calling update_primary_plane -extending patch for gen5+ platforms v5: Addressed Ville's review comments -Making mmio flip vs cs flip selection based on module parameter -Adding check for DRIVER_MODESET feature in notify_ring before calling notify mmio flip. -Other changes mostly in function arguments v6: -Having a seperate function to check condition for using mmio flips (Ville) -propogating error code from i915_gem_check_olr (Ville) v7: -Adding __must_check with i915_gem_check_olr (Chris) -Renaming mmio_flip_data to mmio_flip (Chris) -Rebasing on latest nightly v8: -Rebasing on latest code -squash 3rd patch in series(mmio setbase vs page flip race) with this patch -Added new tiling mode update in intel_do_mmio_flip (Chris) v9: -check for obj->last_write_seqno being 0 instead of obj->ring being NULL in intel_postpone_flip, as this is a more restrictive condition (Chris) v10: -Applied Chris's suggestions for squashing patches 2,3 into this patch. These patches make the selection of CS vs MMIO flip at the page flip time, and make the module parameter for using mmio flips as tristate, the states being 'force CS flips', 'force mmio flips', 'driver discretion'. Changed the logic for driver discretion (Chris) v11: Minor code cleanup(better readability, fixing whitespace errors, using lockdep to check mutex locked status in postpone_flip, removal of __must_check in function definition) (Chris) Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Sourab Gupta <sourab.gupta@intel.com> Signed-off-by: Akash Goel <akash.goel@intel.com> Tested-by: Chris Wilson <chris@chris-wilson.co.uk> # snb, ivb [danvet: Fix up parameter alignement checkpatch spotted.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-06-02 11:17:17 +00:00
module_param_named(use_mmio_flip, i915.use_mmio_flip, int, 0600);
MODULE_PARM_DESC(use_mmio_flip,
"use MMIO flips (-1=never, 0=driver discretion [default], 1=always)");
drm/i915: reorganize the unclaimed register detection code The current code only runs when we do an I915_WRITE operation. It checks if the unclaimed register flag is set before we do the operation, and then it checks it again after we do the operation. This double check allows us to find out if the I915_WRITE operation in question is the bad one, or if some previous code is the bad one. When it finds a problem, our code uses DRM_ERROR to signal it. The good thing about the current code is that it detects the problem, so at least we can know we did something wrong. The problem is that even though we find the problem, we don't really have much information to actually debug it. So whenever I see one of these DRM_ERROR messages on my systems, the first thing I do is apply a patch to change the DRM_ERROR to a WARN and also check for unclaimed registers on I915_READ operations. This local patch makes things even slower, but it usually helps a lot in finding the bad code. The first point here is that since the current code is only useful to detect whether we have a problem or not, but it is not really good to find the cause of the problem, I don't think we should be checking both before and after every I915_WRITE operation: just doing the check once should be enough for us to quickly detect problems. With this change, the code that runs by default for every single user will only do 1 read operation for every single I915_WRITE, instead of 2. This patch does this change. The second point is that the local patch I have should be upstream, but since it makes things slower it should be disabled by default. So I added the i915.mmio_debug option to enable it. So after this patch, this is what will happen: - By default, we will try to detect unclaimed registers once after every I915_WRITE operation. Previously we tried twice for every I915_WRITE. - When we find an unclaimed register we will still print a DRM_ERROR message, but we will now tell the user to try again with i915.mmio_debug=1. - When we use i915.mmio_debug=1 we will try to find unclaimed registers both before and after every I915_READ and I915_WRITE operation, and we will print stack traces in case we find them. This should really help locating the exact point of the bad code (or at least finding out that i915.ko is not the problem). This commit also opens space for really-slow register debugging operations on other platforms. In theory we can now add lots and lots of debug code behind i915.mmio_debug, enable this option on our tests, and catch more problems. v2: - Remove not-so-useful comments (Daniel) - Fix the param definition macros (Rodrigo) Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com> Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-07-16 20:49:29 +00:00
drm/i915: Disable the mmio.debug WARN after it fires If we have a single unclaimed register, we will have lots. A WARN for each one makes the machine unusable and does not aid debugging. Convert the i915.mmio_debug option to a counter for how many WARNs to fire before shutting up. Even when i915.mmio_debug was disabled it would continue to shout an *ERROR* for every interrupt, without any information at all for debugging. The massive verbiage was added in commit 5978118c39c2f72fd8b39ef9c086723542384809 Author: Paulo Zanoni <paulo.r.zanoni@intel.com> Date: Wed Jul 16 17:49:29 2014 -0300 drm/i915: reorganize the unclaimed register detection code v2: Automatically enable invalid mmio reporting for the *next* invalid access if mmio_debug is disabled by default. This should give us clearer debug information without polluting the logs too much. v3: Compile fixes, rebase. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Rodrigo Vivi <rodrigo.vivi@gmail.com> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com> [danvet: Update modparam text per the thread.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-12-18 10:55:50 +00:00
module_param_named(mmio_debug, i915.mmio_debug, int, 0600);
drm/i915: reorganize the unclaimed register detection code The current code only runs when we do an I915_WRITE operation. It checks if the unclaimed register flag is set before we do the operation, and then it checks it again after we do the operation. This double check allows us to find out if the I915_WRITE operation in question is the bad one, or if some previous code is the bad one. When it finds a problem, our code uses DRM_ERROR to signal it. The good thing about the current code is that it detects the problem, so at least we can know we did something wrong. The problem is that even though we find the problem, we don't really have much information to actually debug it. So whenever I see one of these DRM_ERROR messages on my systems, the first thing I do is apply a patch to change the DRM_ERROR to a WARN and also check for unclaimed registers on I915_READ operations. This local patch makes things even slower, but it usually helps a lot in finding the bad code. The first point here is that since the current code is only useful to detect whether we have a problem or not, but it is not really good to find the cause of the problem, I don't think we should be checking both before and after every I915_WRITE operation: just doing the check once should be enough for us to quickly detect problems. With this change, the code that runs by default for every single user will only do 1 read operation for every single I915_WRITE, instead of 2. This patch does this change. The second point is that the local patch I have should be upstream, but since it makes things slower it should be disabled by default. So I added the i915.mmio_debug option to enable it. So after this patch, this is what will happen: - By default, we will try to detect unclaimed registers once after every I915_WRITE operation. Previously we tried twice for every I915_WRITE. - When we find an unclaimed register we will still print a DRM_ERROR message, but we will now tell the user to try again with i915.mmio_debug=1. - When we use i915.mmio_debug=1 we will try to find unclaimed registers both before and after every I915_READ and I915_WRITE operation, and we will print stack traces in case we find them. This should really help locating the exact point of the bad code (or at least finding out that i915.ko is not the problem). This commit also opens space for really-slow register debugging operations on other platforms. In theory we can now add lots and lots of debug code behind i915.mmio_debug, enable this option on our tests, and catch more problems. v2: - Remove not-so-useful comments (Daniel) - Fix the param definition macros (Rodrigo) Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com> Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-07-16 20:49:29 +00:00
MODULE_PARM_DESC(mmio_debug,
drm/i915: Disable the mmio.debug WARN after it fires If we have a single unclaimed register, we will have lots. A WARN for each one makes the machine unusable and does not aid debugging. Convert the i915.mmio_debug option to a counter for how many WARNs to fire before shutting up. Even when i915.mmio_debug was disabled it would continue to shout an *ERROR* for every interrupt, without any information at all for debugging. The massive verbiage was added in commit 5978118c39c2f72fd8b39ef9c086723542384809 Author: Paulo Zanoni <paulo.r.zanoni@intel.com> Date: Wed Jul 16 17:49:29 2014 -0300 drm/i915: reorganize the unclaimed register detection code v2: Automatically enable invalid mmio reporting for the *next* invalid access if mmio_debug is disabled by default. This should give us clearer debug information without polluting the logs too much. v3: Compile fixes, rebase. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Rodrigo Vivi <rodrigo.vivi@gmail.com> Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com> [danvet: Update modparam text per the thread.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-12-18 10:55:50 +00:00
"Enable the MMIO debug code for the first N failures (default: off). "
"This may negatively affect performance.");
drm/i915: tame the chattermouth (v2) Many distro's have mechanism in place to collect and automatically file bugs for failed WARN()s. And since i915 has a lot of hw state sanity checks which result in WARN(), it generates quite a lot of noise which is somewhat disconcerting to the end user. Separate out the internal hw-is-in-the-state-I-expected checks into I915_STATE_WARN()s and allow configuration via i915.verbose_checks module param about whether this will generate a full blown stacktrace or just DRM_ERROR(). The new moduleparam defaults to true, so by default there is no change in behavior. And even when disabled, you will still get an error message logged. v2: paint the macro names blue, clarify that the default behavior remains the same as before Signed-off-by: Rob Clark <robdclark@gmail.com> Acked-by: Jani Nikula <jani.nikula@intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-12-15 18:56:32 +00:00
module_param_named(verbose_state_checks, i915.verbose_state_checks, bool, 0600);
MODULE_PARM_DESC(verbose_state_checks,
"Enable verbose logs (ie. WARN_ON()) in case of unexpected hw state conditions.");
drm/i915: Add i915.nuclear_pageflip command line param to force atomic (v4) We don't have full atomic modeset support yet, but the "nuclear pageflip" subset of functionality (i.e., plane operations only) should be ready. Allow the user to force atomic on for debug purposes, or for fixed-purpose embedded devices that will only use atomic for plane updates. The term 'nuclear' is used here instead of 'atomic' to make it clear that this doesn't allow full atomic modeset support, just a (very useful) subset of the atomic functionality. We'll drop the kernel parameter and unconditionally enable atomic in a future patch once all of the necessary pieces are in. v2: - Use module_param_named_unsafe() (Daniel) - Simplify comment on DRIVER_ATOMIC guard (Daniel) v3: - Make the parameter "nuclear_pageflip" rather than just "nuclear" for clarity. (Ander) v4: - Make the internal variable "nuclear_pageflip" as well as the command-line option. (Ander) Signed-off-by: Matt Roper <matthew.d.roper@intel.com> Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-01-23 00:53:12 +00:00
module_param_named_unsafe(nuclear_pageflip, i915.nuclear_pageflip, bool, 0600);
MODULE_PARM_DESC(nuclear_pageflip,
"Force atomic modeset functionality; only planes work for now (default: false).");
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