/* * netsniff-ng - the packet sniffing beast * Copyright 2009, 2010 Daniel Borkmann. * Copyright 2010 Marek Polacek. * Subject to the GPL, version 2. */ #include #include "iosched.h" #include "die.h" #define IOPRIO_CLASS_SHIFT 13 enum { ioprio_class_none, ioprio_class_rt, ioprio_class_be, ioprio_class_idle, }; enum { ioprio_who_process = 1, ioprio_who_pgrp, ioprio_who_user, }; static const char *const to_prio[] = { "none", "realtime", "best-effort", "idle", }; static inline int ioprio_set(int which, int who, int ioprio) { return syscall(SYS_ioprio_set, which, who, ioprio); } static inline int ioprio_get(int which, int who) { return syscall(SYS_ioprio_get, which, who); } static void ioprio_setpid(pid_t pid, int ioprio, int ioclass) { int ret = ioprio_set(ioprio_who_process, pid, ioprio | ioclass << IOPRIO_CLASS_SHIFT); if (ret < 0) panic("Failed to set io prio for pid: %s\n", strerror(errno)); } void ioprio_print(void) { int ioprio = ioprio_get(ioprio_who_process, getpid()); if (ioprio < 0) panic("Failed to fetch io prio for pid!\n"); else { int ioclass = ioprio >> IOPRIO_CLASS_SHIFT; if (ioclass != ioprio_class_idle) { ioprio &= 0xff; printf("%s: prio %d\n", to_prio[ioclass], ioprio); } else printf("%s\n", to_prio[ioclass]); } } void set_ioprio_rt(void) { ioprio_setpid(getpid(), 4, ioprio_class_rt); } void set_ioprio_be(void) { ioprio_setpid(getpid(), 4, ioprio_class_be); } lumbingsTobias Klauser
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authorHans de Goede <hdegoede@redhat.com>2016-12-02 15:29:04 +0100
committerJani Nikula <jani.nikula@intel.com>2016-12-20 16:27:46 +0200
commitbb98e72adaf9d19719aba35f802d4836f5d5176c (patch)
treee85639ffdd4bf704258622a4dd09bd9591896705
parent35f6c2336b1a5007ec837623f771d2d56dfba5c2 (diff)
drm/i915/dsi: Do not clear DPOUNIT_CLOCK_GATE_DISABLE from vlv_init_display_clock_gating
On my Cherrytrail CUBE iwork8 Air tablet PIPE-A would get stuck on loading i915 at boot 1 out of every 3 boots, resulting in a non functional LCD. Once the i915 driver has successfully loaded, the panel can be disabled / enabled without hitting this issue. The getting stuck is caused by vlv_init_display_clock_gating() clearing the DPOUNIT_CLOCK_GATE_DISABLE bit in DSPCLK_GATE_D when called from chv_pipe_power_well_ops.enable() on driver load, while a pipe is enabled driving the DSI LCD by the BIOS. Clearing this bit while DSI is in use is a known issue and intel_dsi_pre_enable() / intel_dsi_post_disable() already set / clear it as appropriate. This commit modifies vlv_init_display_clock_gating() to leave the DPOUNIT_CLOCK_GATE_DISABLE bit alone fixing the pipe getting stuck. Changes in v2: -Replace PIPE-A with "a pipe" or "the pipe" in the commit msg and comment Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97330 Cc: stable@vger.kernel.org Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20161202142904.25613-1-hdegoede@redhat.com Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> (cherry picked from commit 721d484563e1a51ada760089c490cbc47e909756) Signed-off-by: Jani Nikula <jani.nikula@intel.com>
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