dri-devel October 2019

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1833 discussions

linux-5.4-rc2/drivers/video/fbdev/amifb.c:1875: bad expression ?
by David Binderman 07 Oct '19

07 Oct '19

Hello there, linux-5.4-rc2/drivers/video/fbdev/amifb.c:1875:41: error: Expression '(*(lspr+delta)<<16)|(*lspr++)' depends on order of evaluation of side effects [unknownEvaluationOrder] Source code is datawords = (*(lspr + delta) << 16) | (*lspr++); Maybe better code: datawords = (*(lspr + delta) << 16) | (*lspr); ++lspr; Regards David Binderman

1 0

[PATCH] drm/amdkfd: Fix a && vs || typo
by Dan Carpenter 07 Oct '19

07 Oct '19

In the current code if "device_info" is ever NULL then the kernel will Oops so probably || was intended instead of &&. Fixes: e392c887df97 ("drm/amdkfd: Use array to probe kfd2kgd_calls") Signed-off-by: Dan Carpenter <dan.carpenter(a)oracle.com> --- drivers/gpu/drm/amd/amdkfd/kfd_device.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c index 0db273587af4..070c9b5593c9 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c @@ -498,7 +498,7 @@ struct kfd_dev *kgd2kfd_probe(struct kgd_dev *kgd, device_info = kfd_supported_devices[asic_type][vf]; f2g = kfd2kgd_funcs[asic_type]; - if (!device_info && !f2g) { + if (!device_info || !f2g) { dev_err(kfd_device, "%s %s not supported in kfd\n", amdgpu_asic_name[asic_type], vf ? "VF" : ""); return NULL; -- 2.20.1

2 1

[PATCH] drm/amd/powerplay: Fix error handling in smu_init_fb_allocations()
by Dan Carpenter 07 Oct '19

07 Oct '19

The error handling is off by one. We should not free the first "tables[i].bo" without decrementing "i" because that might result in a double free. The second problem is that when an error occurs, then the zeroth element "tables[0].bo" isn't freed. I had make "i" signed int for the error handling to work, so I just updated "ret" as well as a clean up. Fixes: f96357a991b9 ("drm/amd/powerplay: implement smu_init(fini)_fb_allocations function") Signed-off-by: Dan Carpenter <dan.carpenter(a)oracle.com> --- drivers/gpu/drm/amd/powerplay/amdgpu_smu.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c index f1fbbc8b77ee..c9266ea70331 100644 --- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c +++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c @@ -896,8 +896,7 @@ static int smu_init_fb_allocations(struct smu_context *smu) struct amdgpu_device *adev = smu->adev; struct smu_table_context *smu_table = &smu->smu_table; struct smu_table *tables = smu_table->tables; - uint32_t i = 0; - int32_t ret = 0; + int ret, i; for (i = 0; i < SMU_TABLE_COUNT; i++) { if (tables[i].size == 0) @@ -915,7 +914,7 @@ static int smu_init_fb_allocations(struct smu_context *smu) return 0; failed: - for (; i > 0; i--) { + while (--i >= 0) { if (tables[i].size == 0) continue; amdgpu_bo_free_kernel(&tables[i].bo, -- 2.20.1

3 2

[PATCH] drm/amd/powerplay: unlock on error in smu_resume()
by Dan Carpenter 07 Oct '19

07 Oct '19

This function needs to drop the mutex before returning. Fixes: f7e3a5776fa6 ("drm/amd/powerplay: check SMU engine readiness before proceeding on S3 resume") Signed-off-by: Dan Carpenter <dan.carpenter(a)oracle.com> --- drivers/gpu/drm/amd/powerplay/amdgpu_smu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c index 6a64f765fcd4..f1fbbc8b77ee 100644 --- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c +++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c @@ -1384,7 +1384,7 @@ static int smu_resume(void *handle) ret = smu_start_smc_engine(smu); if (ret) { pr_err("SMU is not ready yet!\n"); - return ret; + goto failed; } ret = smu_smc_table_hw_init(smu, false); -- 2.20.1

3 2

[PATCH 0/5] drm/amd/display: some fixes for gcc warning
by zhengbin 07 Oct '19

07 Oct '19

zhengbin (5): drm/amd/display: Make function wait_for_alt_mode static drm/amd/display: Remove set but not used variable 'source_bpp' drm/amd/display: Remove set but not used variables 'h_ratio_chroma','v_ratio_chroma' drm/amd/display: Remove set but not used variable 'pixel_width' drm/amd/display: Remove set but not used variables 'pp_smu','old_pipe' drivers/gpu/drm/amd/display/dc/core/dc_link.c | 2 +- drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c | 12 ------------ drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dpp.c | 7 ------- drivers/gpu/drm/amd/display/dc/dcn20/dcn20_dwb_scl.c | 4 ---- drivers/gpu/drm/amd/display/dc/dsc/rc_calc.c | 3 --- 5 files changed, 1 insertion(+), 27 deletions(-) -- 2.7.4

3 7

[PATCH -next] drm/amdgpu: remove duplicated include from mmhub_v1_0.c
by YueHaibing 07 Oct '19

07 Oct '19

Remove duplicated include. Signed-off-by: YueHaibing <yuehaibing(a)huawei.com> --- drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c index 4c7e8c64a94e..6965e1e6fa9e 100644 --- a/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c +++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v1_0.c @@ -31,7 +31,6 @@ #include "vega10_enum.h" #include "soc15_common.h" -#include "amdgpu_ras.h" #define mmDAGB0_CNTL_MISC2_RV 0x008f #define mmDAGB0_CNTL_MISC2_RV_BASE_IDX 0

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[PATCH -next] drm/amd/display: remove set but not used variable 'core_freesync'
by YueHaibing 07 Oct '19

07 Oct '19

Fixes gcc '-Wunused-but-set-variable' warning: rivers/gpu/drm/amd/amdgpu/../display/modules/freesync/freesync.c: In function mod_freesync_get_settings: drivers/gpu/drm/amd/amdgpu/../display/modules/freesync/freesync.c:984:24: warning: variable core_freesync set but not used [-Wunused-but-set-variable] It is not used since commit 98e6436d3af5 ("drm/amd/display: Refactor FreeSync module") Reported-by: Hulk Robot <hulkci(a)huawei.com> Signed-off-by: YueHaibing <yuehaibing(a)huawei.com> --- drivers/gpu/drm/amd/display/modules/freesync/freesync.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c index 9ce56a8..237dda7 100644 --- a/drivers/gpu/drm/amd/display/modules/freesync/freesync.c +++ b/drivers/gpu/drm/amd/display/modules/freesync/freesync.c @@ -981,13 +981,9 @@ void mod_freesync_get_settings(struct mod_freesync *mod_freesync, unsigned int *inserted_frames, unsigned int *inserted_duration_in_us) { - struct core_freesync *core_freesync = NULL; - if (mod_freesync == NULL) return; - core_freesync = MOD_FREESYNC_TO_CORE(mod_freesync); - if (vrr->supported) { *v_total_min = vrr->adjust.v_total_min; *v_total_max = vrr->adjust.v_total_max; -- 2.7.4

3 2

[PATCH] drm/amd/display: Fix typo in some comments
by Christophe JAILLET 07 Oct '19

07 Oct '19

p and g are switched in 'amdpgu_dm' Signed-off-by: Christophe JAILLET <christophe.jaillet(a)wanadoo.fr> --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 92932d521d7f..b9c2e1a930ab 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -1043,7 +1043,7 @@ static void s3_handle_mst(struct drm_device *dev, bool suspend) /** * dm_hw_init() - Initialize DC device - * @handle: The base driver device containing the amdpgu_dm device. + * @handle: The base driver device containing the amdgpu_dm device. * * Initialize the &struct amdgpu_display_manager device. This involves calling * the initializers of each DM component, then populating the struct with them. @@ -1073,7 +1073,7 @@ static int dm_hw_init(void *handle) /** * dm_hw_fini() - Teardown DC device - * @handle: The base driver device containing the amdpgu_dm device. + * @handle: The base driver device containing the amdgpu_dm device. * * Teardown components within &struct amdgpu_display_manager that require * cleanup. This involves cleaning up the DRM device, DC, and any modules that -- 2.20.1

3 2

[PATCH 0/3] drm/sun4i: dsi: misc timing fixes
by Icenowy Zheng 07 Oct '19

07 Oct '19

This patchset fixes some portion of timing calculation in sun6i_mipi_dsi driver according to the BSP driver. Two of the patches are reverting, one is fixing some misread of the BSP source code, another is fixing a wrong refactor that actually breaks the formula. The other non-reverting patch is fixing a porch error which is usually seen in the original driver commit. Most of porch errors are then fixed, but this one gets ignored. By applying these patches, several DSI panels are tested to be driven properly by the timing provided by the vendor, including the LCD panel of PinePhone "Don't Be Evil" DevKit, the final PinePhone panel and the panel on PineTab. Without these patches they need dirty timing hacks to work. Icenowy Zheng (3): Revert "drm/sun4i: dsi: Change the start delay calculation" drm/sun4i: dsi: fix DRQ calculation Revert "drm/sun4i: dsi: Rework a bit the hblk calculation" drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 16 +++++----------- 1 file changed, 5 insertions(+), 11 deletions(-) -- 2.21.0

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[PATCH v18 00/19] kunit: introduce KUnit, the Linux kernel unit testing framework
by Brendan Higgins 07 Oct '19

07 Oct '19

## TL;DR This revision addresses comments from Linus[1] and Randy[2], by moving top level `kunit/` directory to `lib/kunit/` and likewise moves top level Kconfig entry under lib/Kconfig.debug, so the KUnit submenu now shows up under the "Kernel Hacking" menu. As a consequence of this, I rewrote patch 06/18 (kbuild: enable building KUnit) - now 06/19 (lib: enable building KUnit in lib/), and now needs to be re-acked/reviewed. ## Background This patch set proposes KUnit, a lightweight unit testing and mocking framework for the Linux kernel. Unlike Autotest and kselftest, KUnit is a true unit testing framework; it does not require installing the kernel on a test machine or in a VM (however, KUnit still allows you to run tests on test machines or in VMs if you want[3]) and does not require tests to be written in userspace running on a host kernel. Additionally, KUnit is fast: From invocation to completion KUnit can run several dozen tests in about a second. Currently, the entire KUnit test suite for KUnit runs in under a second from the initial invocation (build time excluded). KUnit is heavily inspired by JUnit, Python's unittest.mock, and Googletest/Googlemock for C++. KUnit provides facilities for defining unit test cases, grouping related test cases into test suites, providing common infrastructure for running tests, mocking, spying, and much more. ### What's so special about unit testing? A unit test is supposed to test a single unit of code in isolation, hence the name. There should be no dependencies outside the control of the test; this means no external dependencies, which makes tests orders of magnitudes faster. Likewise, since there are no external dependencies, there are no hoops to jump through to run the tests. Additionally, this makes unit tests deterministic: a failing unit test always indicates a problem. Finally, because unit tests necessarily have finer granularity, they are able to test all code paths easily solving the classic problem of difficulty in exercising error handling code. ### Is KUnit trying to replace other testing frameworks for the kernel? No. Most existing tests for the Linux kernel are end-to-end tests, which have their place. A well tested system has lots of unit tests, a reasonable number of integration tests, and some end-to-end tests. KUnit is just trying to address the unit test space which is currently not being addressed. ### More information on KUnit There is a bunch of documentation near the end of this patch set that describes how to use KUnit and best practices for writing unit tests. For convenience I am hosting the compiled docs here[4]. Additionally for convenience, I have applied these patches to a branch[5]. The repo may be cloned with: git clone https://kunit.googlesource.com/linux This patchset is on the kunit/initial/v5.3/v18 branch. ## History since v15 ### v18 - Addrssed comments on 07/19 (kunit: test: add initial tests) from Randy Dunlap by removing redundant dependencies from Kconfig entries. ### v17 - Addressed comments on 06/19 (lib: enable building KUnit in lib/) from Stephen Boyd by moving KUnit submenu ahead of Runtime Testing submenu. ### v16 - Addressed comments from Linus Torvalds by moving all kunit/ paths to lib/kunit/. - Addressed comments by Randy Dunlap by moving KUnit Kconfig under lib/Kconfig.debug so the KUnit submenu shows up under the "Kernel Hacking" menu. [1] https://www.lkml.org/lkml/2019/9/20/696 [2] https://www.lkml.org/lkml/2019/9/20/738 [3] https://google.github.io/kunit-docs/third_party/kernel/docs/usage.html#kuni… [4] https://google.github.io/kunit-docs/third_party/kernel/docs/ [5] https://kunit.googlesource.com/linux/+/kunit/initial/v5.3/v18 --- Avinash Kondareddy (1): kunit: test: add tests for KUnit managed resources Brendan Higgins (16): kunit: test: add KUnit test runner core kunit: test: add test resource management API kunit: test: add string_stream a std::stream like string builder kunit: test: add assertion printing library kunit: test: add the concept of expectations lib: enable building KUnit in lib/ kunit: test: add initial tests objtool: add kunit_try_catch_throw to the noreturn list kunit: test: add support for test abort kunit: test: add tests for kunit test abort kunit: test: add the concept of assertions kunit: defconfig: add defconfigs for building KUnit tests Documentation: kunit: add documentation for KUnit MAINTAINERS: add entry for KUnit the unit testing framework MAINTAINERS: add proc sysctl KUnit test to PROC SYSCTL section kunit: fix failure to build without printk Felix Guo (1): kunit: tool: add Python wrappers for running KUnit tests Iurii Zaikin (1): kernel/sysctl-test: Add null pointer test for sysctl.c:proc_dointvec() Documentation/dev-tools/index.rst | 1 + Documentation/dev-tools/kunit/api/index.rst | 16 + Documentation/dev-tools/kunit/api/test.rst | 11 + Documentation/dev-tools/kunit/faq.rst | 62 + Documentation/dev-tools/kunit/index.rst | 79 + Documentation/dev-tools/kunit/start.rst | 180 ++ Documentation/dev-tools/kunit/usage.rst | 576 +++++++ MAINTAINERS | 13 + arch/um/configs/kunit_defconfig | 3 + include/kunit/assert.h | 356 ++++ include/kunit/string-stream.h | 51 + include/kunit/test.h | 1490 +++++++++++++++++ include/kunit/try-catch.h | 75 + kernel/Makefile | 2 + kernel/sysctl-test.c | 392 +++++ lib/Kconfig.debug | 13 + lib/Makefile | 2 + lib/kunit/Kconfig | 36 + lib/kunit/Makefile | 9 + lib/kunit/assert.c | 141 ++ lib/kunit/example-test.c | 88 + lib/kunit/string-stream-test.c | 52 + lib/kunit/string-stream.c | 217 +++ lib/kunit/test-test.c | 331 ++++ lib/kunit/test.c | 478 ++++++ lib/kunit/try-catch.c | 118 ++ tools/objtool/check.c | 1 + tools/testing/kunit/.gitignore | 3 + tools/testing/kunit/configs/all_tests.config | 3 + tools/testing/kunit/kunit.py | 136 ++ tools/testing/kunit/kunit_config.py | 66 + tools/testing/kunit/kunit_kernel.py | 149 ++ tools/testing/kunit/kunit_parser.py | 310 ++++ tools/testing/kunit/kunit_tool_test.py | 206 +++ .../test_is_test_passed-all_passed.log | 32 + .../test_data/test_is_test_passed-crash.log | 69 + .../test_data/test_is_test_passed-failure.log | 36 + .../test_is_test_passed-no_tests_run.log | 75 + .../test_output_isolated_correctly.log | 106 ++ .../test_data/test_read_from_file.kconfig | 17 + 40 files changed, 6001 insertions(+) create mode 100644 Documentation/dev-tools/kunit/api/index.rst create mode 100644 Documentation/dev-tools/kunit/api/test.rst create mode 100644 Documentation/dev-tools/kunit/faq.rst create mode 100644 Documentation/dev-tools/kunit/index.rst create mode 100644 Documentation/dev-tools/kunit/start.rst create mode 100644 Documentation/dev-tools/kunit/usage.rst create mode 100644 arch/um/configs/kunit_defconfig create mode 100644 include/kunit/assert.h create mode 100644 include/kunit/string-stream.h create mode 100644 include/kunit/test.h create mode 100644 include/kunit/try-catch.h create mode 100644 kernel/sysctl-test.c create mode 100644 lib/kunit/Kconfig create mode 100644 lib/kunit/Makefile create mode 100644 lib/kunit/assert.c create mode 100644 lib/kunit/example-test.c create mode 100644 lib/kunit/string-stream-test.c create mode 100644 lib/kunit/string-stream.c create mode 100644 lib/kunit/test-test.c create mode 100644 lib/kunit/test.c create mode 100644 lib/kunit/try-catch.c create mode 100644 tools/testing/kunit/.gitignore create mode 100644 tools/testing/kunit/configs/all_tests.config create mode 100755 tools/testing/kunit/kunit.py create mode 100644 tools/testing/kunit/kunit_config.py create mode 100644 tools/testing/kunit/kunit_kernel.py create mode 100644 tools/testing/kunit/kunit_parser.py create mode 100755 tools/testing/kunit/kunit_tool_test.py create mode 100644 tools/testing/kunit/test_data/test_is_test_passed-all_passed.log create mode 100644 tools/testing/kunit/test_data/test_is_test_passed-crash.log create mode 100644 tools/testing/kunit/test_data/test_is_test_passed-failure.log create mode 100644 tools/testing/kunit/test_data/test_is_test_passed-no_tests_run.log create mode 100644 tools/testing/kunit/test_data/test_output_isolated_correctly.log create mode 100644 tools/testing/kunit/test_data/test_read_from_file.kconfig -- 2.23.0.351.gc4317032e6-goog

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dri-devel October 2019