kernel/include/drm/drm_print.h, branch linux-5.1.y

Merge drm/drm-next into drm-misc-next

2018-08-27T14:00:03Z

Now that 4.19-rc1 is cut, backmerge it into -misc-next. Signed-off-by: Sean Paul

drm: Add puts callback for the coredump printer

2018-07-30T12:49:41Z

Add a puts function for the coredump printer to bypass printf() for constant strings for a speed boost. Reorganize the coredump printf callback to share as much code as possible. v2: Try to reuse code between print and puts as suggested by Chris Wilson Signed-off-by: Jordan Crouse Signed-off-by: Rob Clark

drm: Add a -puts() function for the seq_file printer

2018-07-30T12:49:38Z

Add a puts() function to use seq_puts() to help speed up up print time for constant strings. Reviewed-by: Daniel Vetter Signed-off-by: Jordan Crouse Signed-off-by: Rob Clark

drm: Add drm_puts() to complement drm_printf()

2018-07-30T12:49:35Z

Add drm_puts() for a much faster path to print constant strings into a drm_printer object with memcpy and friends. This can have seconds off of really large outputs such as GPU dumps. If the drm_printer object supports a custom puts function then use that otherwise fall back to the slower legacy printf call. v2: Add documentation for drm_puts() per Daniel Vetter Reviewed-by: Daniel Vetter Signed-off-by: Jordan Crouse [robclark fix minor htmldocs warning] Signed-off-by: Rob Clark

drm: drm_printer: Add printer for devcoredump

2018-07-30T12:49:31Z

Add a drm printer suitable for use with the read callback for devcoredump or other suitable buffer based output format that isn't otherwise covered by seq_file. v2: Add improved documentation per Daniel Vetter Signed-off-by: Jordan Crouse Signed-off-by: Rob Clark

drm/print: Fix DRM_DEBUG_DP macro

2018-07-19T17:10:49Z

This isn't supposed to take dev as an argument, I guess no one noticed! Signed-off-by: Lyude Paul Reviewed-by: Rodrigo Vivi Link: https://patchwork.freedesktop.org/patch/msgid/20180718215716.5784-1-lyude@redhat.com

drm/dp_helper: Add DP aux channel tracing

2018-07-16T15:47:53Z

This is something we've needed for a very long time now, as it makes debugging issues with faulty MST hubs along with debugging issues regarding us interfacing with hubs correctly vastly easier to debug. Currently this can actually be done if you trace the i2c devices for DP using ftrace but that's significantly less useful for a couple of reasons: - Tracing the i2c devices through ftrace means all of the traces are going to contain a lot of "garbage" output that we're sending over the i2c line. Most of this garbage comes from retrying transactions, DRM's helper library adding extra transactions to work around bad hubs, etc. - Having a user set up ftrace so that they can provide debugging information is a lot more difficult then being able to say "just boot with drm.debug=0x100" - We can potentially expand upon this tracing in the future to print debugging information in regards to other DP transactions like MST sideband transactions This is inspired by a patch Rob Clark sent to do this a long time back. Neither of us could find the patch however, so we both assumed it would probably just be easier to rewrite it anyway. Cc: Rob Clark Signed-off-by: Lyude Paul Reviewed-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20180716154432.13433-1-lyude@redhat.com

drm: Reduce object size of DRM_DEV_ uses

2018-03-19T14:15:42Z

These macros are similar to the DRM_ with the addition of a struct device * to the arguments. Convert the single drm_dev_printk function into 2 separate functions. drm_dev_printk with a KERN_ * for generic use and drm_dev_dbg for conditional masked use. Remove the __func__ argument and use __builtin_return_address(0) to be similar to the DRM_ macros uses. Convert the DRM_DEV_ macros to remove now unnecessary arguments and use a consistent style. These macros are rarely used in the generic gpu/drm code so the code size does not change much for a defconfig, but when more drivers are enabled, there is ~4k savings. Many of these macros have no existing use at all. $ size -t drivers/gpu/drm/built-in.a | tail -1 1877530 44651 995 1923176 1d5868 (TOTALS) $ size -t drivers/gpu/drm/built-in.a | tail -1 1877527 44651 995 1923173 1d5865 (TOTALS) $ size -t drivers/gpu/drm/built-in.a | tail -1 17166750 2689238 108352 19964340 130a1b4 (TOTALS) $ size -t drivers/gpu/drm/built-in.a | tail -1 17168888 2691734 108352 19968974 130b3ce (TOTALS) Signed-off-by: Joe Perches Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/e5c164946e15375ac71b69b75f296efdf0b76e6d.1521233717.git.joe@perches.com

drm: Reduce object size of DRM_ERROR and DRM_DEBUG uses

2018-03-16T07:41:57Z

drm_printk is used for both DRM_ERROR and DRM_DEBUG with unnecessary arguments that can be removed by creating separate functins. Create specific functions for these calls to reduce x86/64 defconfig size by ~20k. Modify the existing macros to use the specific calls. new: $ size -t drivers/gpu/drm/built-in.a | tail -1 1876562 44542 995 1922099 1d5433 (TOTALS) old: $ size -t drivers/gpu/drm/built-in.a | tail -1 1897565 44542 995 1943102 1da63e (TOTALS) Miscellanea: o intel_display requires a change to use the specific calls. Signed-off-by: Joe Perches Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/016b5cb84cede20fd0f91ed6965421d99fd5f2ce.1520978414.git.joe@perches.com

drm/print: Unconfuse kerneldoc

2017-12-15T10:13:39Z

It thinks we want to document the __printf(2,0) annotion. Not sure we want to teach it about all possible gcc-only flags, hence why I opted for the cheap trick of just moving it ahead of the kerneldoc. This is only a problem for static inline functions, since for non-inline function the kerneldoc is in the .c file, but the special annotations are all in the header. Cc'ing kernel-doc maintainers as fyi. Cc: linux-doc@vger.kernel.org Cc: Jonathan Corbet Acked-by: Alex Deucher Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20171214203054.20141-3-daniel.vetter@ffwll.ch