| Message ID | 1490861362-4991-2-git-send-email-abdiel.janulgue@linux.intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 30.03.2017 11:09, Abdiel Janulgue wrote: > Sanity check the edid block generation capabilities. > > Cc: Petri Latvala <petri.latvala@intel.com> Ping! > Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com> > --- > lib/tests/Makefile.sources | 1 + > lib/tests/igt_hdmi_inject.c | 96 +++++++++++++++++++++++++++++++++++++++++++++ > 2 files changed, 97 insertions(+) > create mode 100644 lib/tests/igt_hdmi_inject.c > > diff --git a/lib/tests/Makefile.sources b/lib/tests/Makefile.sources > index 3fcfe14..4cfc0a5 100644 > --- a/lib/tests/Makefile.sources > +++ b/lib/tests/Makefile.sources > @@ -13,6 +13,7 @@ check_prog_list = \ > igt_subtest_group \ > igt_assert \ > igt_exit_handler \ > + igt_hdmi_inject \ > $(NULL) > > TESTS = \ > diff --git a/lib/tests/igt_hdmi_inject.c b/lib/tests/igt_hdmi_inject.c > new file mode 100644 > index 0000000..9b6780a > --- /dev/null > +++ b/lib/tests/igt_hdmi_inject.c > @@ -0,0 +1,96 @@ > +/* > + * Copyright © 2017 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, sublicense, > + * 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 "igt.h" > + > +static const unsigned char edid_header[] = { > + 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 > +}; > + > +/** > + * Sanity check the header of the base EDID block. > + * > + * Return: 8 if the header is perfect, down to 0 if it's totally wrong. > + */ > +static int edid_header_is_valid(const unsigned char *raw_edid) > +{ > + int i, score = 0; > + > + for (i = 0; i < sizeof(edid_header); i++) > + if (raw_edid[i] == edid_header[i]) > + score++; > + > + return score; > +} > + > +/** > + * Sanity check the checksum of the EDID block. > + * > + * Return: 0 if the block is perfect. > + * See byte 127 of spec > + * https://en.wikipedia.org/wiki/Extended_Display_Identification_Data#EDID_1.3_data_format > + */ > +static int edid_block_checksum(const unsigned char *raw_edid) > +{ > + int i; > + unsigned char csum = 0; > + for (i = 0; i < EDID_LENGTH; i++) { > + csum += raw_edid[i]; > + } > + > + return csum; > +} > + > +typedef void (*hdmi_inject_func)(const unsigned char *edid, size_t length, > + unsigned char *new_edid_ptr[], size_t *new_length); > + > +igt_simple_main > +{ > + const struct { > + const char *desc; > + hdmi_inject_func inject; > + } funcs[] = { > + { "3D", kmstest_edid_add_3d }, > + { "4k", kmstest_edid_add_4k }, > + { "audio", kmstest_edid_add_audio }, > + { NULL, NULL }, > + }, *f; > + > + for (f = funcs; f->inject; f++) { > + unsigned char *edid; > + size_t length; > + > + f->inject(igt_kms_get_base_edid(), EDID_LENGTH, &edid, > + &length); > + > + igt_assert_f(edid_header_is_valid(edid) == 8, > + "invalid header on HDMI %s", f->desc); > + /* check base edid block */ > + igt_assert_f(edid_block_checksum(edid) == 0, > + "checksum failed on HDMI %s", f->desc); > + /* check extension block */ > + igt_assert_f(edid_block_checksum(edid + EDID_LENGTH) == 0, > + "CEA block checksum failed on HDMI %s", f->desc); > + } > +} >
diff --git a/lib/tests/Makefile.sources b/lib/tests/Makefile.sources index 3fcfe14..4cfc0a5 100644 --- a/lib/tests/Makefile.sources +++ b/lib/tests/Makefile.sources @@ -13,6 +13,7 @@ check_prog_list = \ igt_subtest_group \ igt_assert \ igt_exit_handler \ + igt_hdmi_inject \ $(NULL) TESTS = \ diff --git a/lib/tests/igt_hdmi_inject.c b/lib/tests/igt_hdmi_inject.c new file mode 100644 index 0000000..9b6780a --- /dev/null +++ b/lib/tests/igt_hdmi_inject.c @@ -0,0 +1,96 @@ +/* + * Copyright © 2017 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, sublicense, + * 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 "igt.h" + +static const unsigned char edid_header[] = { + 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 +}; + +/** + * Sanity check the header of the base EDID block. + * + * Return: 8 if the header is perfect, down to 0 if it's totally wrong. + */ +static int edid_header_is_valid(const unsigned char *raw_edid) +{ + int i, score = 0; + + for (i = 0; i < sizeof(edid_header); i++) + if (raw_edid[i] == edid_header[i]) + score++; + + return score; +} + +/** + * Sanity check the checksum of the EDID block. + * + * Return: 0 if the block is perfect. + * See byte 127 of spec + * https://en.wikipedia.org/wiki/Extended_Display_Identification_Data#EDID_1.3_data_format + */ +static int edid_block_checksum(const unsigned char *raw_edid) +{ + int i; + unsigned char csum = 0; + for (i = 0; i < EDID_LENGTH; i++) { + csum += raw_edid[i]; + } + + return csum; +} + +typedef void (*hdmi_inject_func)(const unsigned char *edid, size_t length, + unsigned char *new_edid_ptr[], size_t *new_length); + +igt_simple_main +{ + const struct { + const char *desc; + hdmi_inject_func inject; + } funcs[] = { + { "3D", kmstest_edid_add_3d }, + { "4k", kmstest_edid_add_4k }, + { "audio", kmstest_edid_add_audio }, + { NULL, NULL }, + }, *f; + + for (f = funcs; f->inject; f++) { + unsigned char *edid; + size_t length; + + f->inject(igt_kms_get_base_edid(), EDID_LENGTH, &edid, + &length); + + igt_assert_f(edid_header_is_valid(edid) == 8, + "invalid header on HDMI %s", f->desc); + /* check base edid block */ + igt_assert_f(edid_block_checksum(edid) == 0, + "checksum failed on HDMI %s", f->desc); + /* check extension block */ + igt_assert_f(edid_block_checksum(edid + EDID_LENGTH) == 0, + "CEA block checksum failed on HDMI %s", f->desc); + } +}
Sanity check the edid block generation capabilities. Cc: Petri Latvala <petri.latvala@intel.com> Signed-off-by: Abdiel Janulgue <abdiel.janulgue@linux.intel.com> --- lib/tests/Makefile.sources | 1 + lib/tests/igt_hdmi_inject.c | 96 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 97 insertions(+) create mode 100644 lib/tests/igt_hdmi_inject.c