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n <gregkh@suse.de> 2010-03-03Staging: udlfb: Support for fbdev mmap clients (defio)Bernie Thompson Add support for fbdev mmap clients who don't send damage ioctls Because DisplayLink devices are out on the other end of usb, their "framebuffer" is just normal system memory. So memory mapped writes don't automatically trigger anything. So up to this point, standard fbdev clients who rely on mmap() will get an unchanging screen. This patch makes udlfb a client of Jaya Kumar's defio framework - which sets up page fault triggers, and those faults are accumulated and sent to udlfb on a defferred basis, to process as damage notifications for the framebuffer. Because this involves more overhead than a notification directly from the application (e.g. just passing on X DAMAGE extension notifications), a sysfs attribute is provided by udlfb to control defio support. /sys/class/graphics/fb*/use_defio - writing a "0" to this file before calling mmap() causes defio to not be initialized - instead udlfb will rely on getting damage notifications directly through the damage ioctl. There are unsolved rendering problems with defio (horizontal dead regions on framebuffer, that accumulate over time) which still needs a fix. Signed-off-by: Bernie Thompson <bernie@plugable.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 2010-03-03Staging: udlfb: improved rendering performanceBernie Thompson Rework rendering for improved performance Approx 10-20% gain avg across several "benchmarks": x11perf, gtkperf, glxgears Moves from a single pre-alloc'd urb protected by a long-held mutex To a list of (4) pre-alloc'd urbs which can be dispatched asynchonously Improved rendering algorithm to hardware with lower CPU consumption, fewer system memory accesses, and slightly higher compression. Better scalability to multiple processors, especially with multiple framebuffers active. Signed-off-by: Bernie Thompson <bernie@plugable.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 2010-03-03Staging: udlfb: Rework startup and teardown to fix race conditionsBernie Thompson Rework probe to use refcounts and std functions Because the different parts of the driver (usb, fbdev) tear down in different orders, the driver previously could crash accessing data that had already been freed. Refcounting system used to handle. Reworked probe to make use of refcounts, set mode using std fbops, and set up sysfs and pre-allocated urbs. Signed-off-by: Bernie Thompson <bernie@plugable.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 2010-03-03Staging: udlfb: Add functions to expose sysfs metrics and controlsBernie Thompson Add sysfs controls for edid and performance metrics There are 8 new files exposed in /sys/class/graphics/fb* edid - returns 128 byte edid blog, suitable for parsing with parse-edid metrics_bytes_identical metrics_bytes_rendered metrics_bytes_sent metrics_cpu_kcycles_used metrics_misc and metrics_reset, which resets all perf metrics to zero The 6 perf metrics are of type atomic_t. So these metrics return precise results for short benchmarks, but any test approx a minute or longer runtime may roll over. Signed-off-by: Bernie Thompson <bernie@plugable.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 2010-03-03Staging: udlfb: clean up function namingBernie Thompson Move to more consistent naming scheme All udlfb functions start with udlfb_ All functions for udlfb's fbdev interface start with udlfb_ops_ All functinos for udlfb's usb interface start with udlfb_usb_ Signed-off-by: Bernie Thompson <bernie@plugable.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 2010-03-03Staging: udlfb: pre-allocated urb list helpersBernie Thompson Add functions to pre-allocate and free usb bulk urbs for core render path. Udlfb currently allocates a single urb, guarded by a mutex, that is a key bottleneck. Because udlfb sends so much data, preallocation is most efficient. Functions will be used by new rendering functions in later patches. Signed-off-by: Bernie Thompson <bernie@plugable.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 2010-03-03Staging: udlfb: reorganize function orderBernie Thompson Reorganize the location of a few things to be closer to related code Signed-off-by: Bernie Thompson <bernie@plugable.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 2010-03-03Staging: udlfb: checkpatch cleanupBernie Thompson Eliminate checkpatch.pl warnings and errors so later patches in series are clean Signed-off-by: Bernie Thompson <bernie@plugable.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 2010-03-03Staging: udlfb: add dynamic modeset supportBernie Thompson Add dynamic modeset support udlfb uses EDID to find the monitor’s preferred mode udlfb no longer has fixed mode tables – it’s able to set any mode dynamically, from the standard VESA timing characteristics of the monitor. Draws from probe and setmode code of both displaylink-mod 0.3 branch of Roberto De Ioris, and Jaya Kumar's displaylinkfb. Lays foundation for defio support and making backbuffer optional. With additional changes to minimize diffs and clean for checkpatch.pl style. Does not yet include new ioctls or refcount/mutex code from displaylink-mod. Tested to work with existing xf-video-displaylink X server unmodified. Signed-off-by: Bernie Thompson <bernie@plugable.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 2009-07-28staging: udlfb: Add vmalloc.h includeAmit Kucheria Required for vmalloc_32 and vfree declarations on non-x86 platforms. Signed-off-by: Amit Kucheria <amit.kucheria@canonical.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 2009-06-19Staging: udlfb: update to version 0.2.3Roberto De Ioris This updates the udlfb to the 0.2.3 version. From: Roberto De Ioris <roberto@unbit.it> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 2009-06-19Staging: udlfb: fix some sparse warnings.Greg Kroah-Hartman There are others remaining due to the __iomem namespace of the framebuffer data pointer. Cc: Roberto De Ioris <roberto@unbit.it> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 2009-06-19Staging: udlfb: clean up checkpatch warnings in udlfb.cGreg Kroah-Hartman This cleans up a bunch of checkpatch.pl warnings in the udlfb.c file. Cc: Roberto De Ioris <roberto@unbit.it> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 2009-06-19Staging: add udlfb driverRoberto De Ioris This adds the udlfb driver, a framebuffer driver for DisplayLink devices. From: Roberto De Ioris <roberto@unbit.it> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>