On 12/17, Daniel Vetter wrote: > On Wed, Sep 05, 2018 at 05:38:27PM -0300, Rodrigo Siqueira wrote: > > This commit adds a new option for forcing the use of a specific driver > > indicated via an environment variable. > > > > Changes since V1: > > Petri: > > - Use an environment variable instead of command line > > - Refactor the loop in __search_and_open to accept forced module > > - Don't try to load kernel modules > > > > Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@xxxxxxxxx> > > Note: You can't drop the s-o-b line if your patch contains work by other > people, like from Petri here. Proper way to resend a patch by someone else > is to just add a subject prefix of "PATCH RESEND" and otherwise keep > everything unchanged (including author and everything). > > https://patchwork.freedesktop.org/patch/245532/ Hi, Thanks for your feedback. Next time I will take care for not make this mistake again. Best Regards Rodrigo Siqueira > Cheers, Daniel > > > --- > > lib/drmtest.c | 44 ++++++++++++++++++++++++++++++++++++++++++-- > > lib/drmtest.h | 2 ++ > > lib/igt_core.c | 5 +++++ > > 3 files changed, 49 insertions(+), 2 deletions(-) > > > > diff --git a/lib/drmtest.c b/lib/drmtest.c > > index bfa2e0f0..6e35d1be 100644 > > --- a/lib/drmtest.c > > +++ b/lib/drmtest.c > > @@ -123,6 +123,36 @@ static bool has_known_intel_chipset(int fd) > > return true; > > } > > > > +static char _forced_driver[5] = ""; > > + > > +/** > > + * __set_forced_driver: > > + * @name: name of driver to forcibly use > > + * > > + * Set the name of a driver to use when calling #drm_open_driver with > > + * the #DRIVER_ANY flag. > > + */ > > +void __set_forced_driver(const char *name) > > +{ > > + if (!strcmp(name, "")) { > > + igt_warn("IGT_FORCE_DRIVER flag specified without a value," > > + "ignoring force option\n"); > > + return; > > + } > > + > > + igt_info("Attempt to force module %s\n", name); > > + > > + strncpy(_forced_driver, name, 4); > > +} > > + > > +static const char *forced_driver(void) > > +{ > > + if (_forced_driver[0]) > > + return _forced_driver; > > + > > + return NULL; > > +} > > + > > #define LOCAL_I915_EXEC_VEBOX (4 << 0) > > /** > > * gem_quiescent_gpu: > > @@ -250,8 +280,18 @@ static int __search_and_open(const char *base, int offset, unsigned int chipset) > > > > sprintf(name, "%s%u", base, i + offset); > > fd = open_device(name, chipset); > > - if (fd != -1) > > - return fd; > > + if (fd == -1) > > + continue; > > + > > + // Force module > > + if (chipset == DRIVER_ANY && forced_driver()) { > > + if (__is_device(fd, forced_driver())) > > + return fd; > > + close(fd); > > + continue; > > + } > > + > > + return fd; > > } > > > > return -1; > > diff --git a/lib/drmtest.h b/lib/drmtest.h > > index 949865ee..62f53ec3 100644 > > --- a/lib/drmtest.h > > +++ b/lib/drmtest.h > > @@ -51,6 +51,8 @@ > > */ > > #define DRIVER_ANY ~(DRIVER_VGEM) > > > > +void __set_forced_driver(const char *name); > > + > > /** > > * ARRAY_SIZE: > > * @arr: static array > > diff --git a/lib/igt_core.c b/lib/igt_core.c > > index 23bb858f..8e65b5e3 100644 > > --- a/lib/igt_core.c > > +++ b/lib/igt_core.c > > @@ -647,6 +647,11 @@ static void common_init_env(void) > > igt_frame_dump_path = getenv("IGT_FRAME_DUMP_PATH"); > > > > stderr_needs_sentinel = getenv("IGT_SENTINEL_ON_STDERR") != NULL; > > + > > + env = getenv("IGT_FORCE_DRIVER"); > > + if (env) { > > + __set_forced_driver(env); > > + } > > } > > > > static int common_init(int *argc, char **argv, > > -- > > 2.18.0 > > > > > > -- > > Rodrigo Siqueira > > http://siqueira.tech > > Graduate Student > > Department of Computer Science > > University of São Paulo > > _______________________________________________ > > igt-dev mailing list > > igt-dev@xxxxxxxxxxxxxxxxxxxxx > > https://lists.freedesktop.org/mailman/listinfo/igt-dev > > -- > Daniel Vetter > Software Engineer, Intel Corporation > http://blog.ffwll.ch
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