Re: [PATCH V2 1/2] drm/vkms: Add support for virtual hardware mode

kernel test robot
2021-03-04T00:07:14Z

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Hi Sumera,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.12-rc1 next-20210303]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/0day-ci/linux/commits/Sumera-Priyadarsini/Add-virtual-hardware-module/20210303-205440
base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git f69d02e37a85645aa90d18cacfff36dba370f797
config: powerpc64-randconfig-p002-20210303 (attached as .config)
compiler: powerpc64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/67e97bc2a047c91e1de3544be8668ff9a1e2775b
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Sumera-Priyadarsini/Add-virtual-hardware-module/20210303-205440
git checkout 67e97bc2a047c91e1de3544be8668ff9a1e2775b
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc64

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

drivers/gpu/drm/vkms/vkms_composer.c: In function 'vkms_composer_worker':
>> drivers/gpu/drm/vkms/vkms_composer.c:226:20: warning: variable 'wb_pending' set but not used [-Wunused-but-set-variable]
226 | bool crc_pending, wb_pending;
| ^~~~~~~~~~

vim +/wb_pending +226 drivers/gpu/drm/vkms/vkms_composer.c

67e97bc2a047c9 drivers/gpu/drm/vkms/vkms_composer.c Sumera Priyadarsini 2021-03-03 209
0ca33adb91c0a9 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-09-04 210 /**
a4e7e98e90ebd9 drivers/gpu/drm/vkms/vkms_composer.c Rodrigo Siqueira 2019-06-25 211 * vkms_composer_worker - ordered work_struct to compute CRC
0ca33adb91c0a9 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-09-04 212 *
0ca33adb91c0a9 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-09-04 213 * @work: work_struct
0ca33adb91c0a9 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-09-04 214 *
a4e7e98e90ebd9 drivers/gpu/drm/vkms/vkms_composer.c Rodrigo Siqueira 2019-06-25 215 * Work handler for composing and computing CRCs. work_struct scheduled in
0ca33adb91c0a9 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-09-04 216 * an ordered workqueue that's periodically scheduled to run by
0ca33adb91c0a9 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-09-04 217 * _vblank_handle() and flushed at vkms_atomic_crtc_destroy_state().
0ca33adb91c0a9 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-09-04 218 */
a4e7e98e90ebd9 drivers/gpu/drm/vkms/vkms_composer.c Rodrigo Siqueira 2019-06-25 219 void vkms_composer_worker(struct work_struct *work)
6c234fe37c5762 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-08-02 220 {
6c234fe37c5762 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-08-02 221 struct vkms_crtc_state *crtc_state = container_of(work,
6c234fe37c5762 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-08-02 222 struct vkms_crtc_state,
a4e7e98e90ebd9 drivers/gpu/drm/vkms/vkms_composer.c Rodrigo Siqueira 2019-06-25 223 composer_work);
6c234fe37c5762 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-08-02 224 struct drm_crtc *crtc = crtc_state->base.crtc;
6c234fe37c5762 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-08-02 225 struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
dbd9d80c1b2e03 drivers/gpu/drm/vkms/vkms_composer.c Rodrigo Siqueira 2020-08-30 @226 bool crc_pending, wb_pending;
0ca33adb91c0a9 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-09-04 227 u64 frame_start, frame_end;
67e97bc2a047c9 drivers/gpu/drm/vkms/vkms_composer.c Sumera Priyadarsini 2021-03-03 228 u32 crc32 = 0;
953025763d1421 drivers/gpu/drm/vkms/vkms_composer.c Rodrigo Siqueira 2020-08-30 229 int ret;
0ca33adb91c0a9 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-09-04 230
a4e7e98e90ebd9 drivers/gpu/drm/vkms/vkms_composer.c Rodrigo Siqueira 2019-06-25 231 spin_lock_irq(&out->composer_lock);
0ca33adb91c0a9 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-09-04 232 frame_start = crtc_state->frame_start;
0ca33adb91c0a9 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-09-04 233 frame_end = crtc_state->frame_end;
18d0952a838ba5 drivers/gpu/drm/vkms/vkms_crc.c Daniel Vetter 2019-06-07 234 crc_pending = crtc_state->crc_pending;
dbd9d80c1b2e03 drivers/gpu/drm/vkms/vkms_composer.c Rodrigo Siqueira 2020-08-30 235 wb_pending = crtc_state->wb_pending;
18d0952a838ba5 drivers/gpu/drm/vkms/vkms_crc.c Daniel Vetter 2019-06-07 236 crtc_state->frame_start = 0;
18d0952a838ba5 drivers/gpu/drm/vkms/vkms_crc.c Daniel Vetter 2019-06-07 237 crtc_state->frame_end = 0;
18d0952a838ba5 drivers/gpu/drm/vkms/vkms_crc.c Daniel Vetter 2019-06-07 238 crtc_state->crc_pending = false;
a4e7e98e90ebd9 drivers/gpu/drm/vkms/vkms_composer.c Rodrigo Siqueira 2019-06-25 239 spin_unlock_irq(&out->composer_lock);
0ca33adb91c0a9 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-09-04 240
18d0952a838ba5 drivers/gpu/drm/vkms/vkms_crc.c Daniel Vetter 2019-06-07 241 /*
18d0952a838ba5 drivers/gpu/drm/vkms/vkms_crc.c Daniel Vetter 2019-06-07 242 * We raced with the vblank hrtimer and previous work already computed
18d0952a838ba5 drivers/gpu/drm/vkms/vkms_crc.c Daniel Vetter 2019-06-07 243 * the crc, nothing to do.
18d0952a838ba5 drivers/gpu/drm/vkms/vkms_crc.c Daniel Vetter 2019-06-07 244 */
18d0952a838ba5 drivers/gpu/drm/vkms/vkms_crc.c Daniel Vetter 2019-06-07 245 if (!crc_pending)
18d0952a838ba5 drivers/gpu/drm/vkms/vkms_crc.c Daniel Vetter 2019-06-07 246 return;
6c234fe37c5762 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-08-02 247
67e97bc2a047c9 drivers/gpu/drm/vkms/vkms_composer.c Sumera Priyadarsini 2021-03-03 248 ret = vkms_composer_common(crtc_state, out, crtc_state->wb_pending, &crc32);
67e97bc2a047c9 drivers/gpu/drm/vkms/vkms_composer.c Sumera Priyadarsini 2021-03-03 249 if (ret == -EINVAL)
953025763d1421 drivers/gpu/drm/vkms/vkms_composer.c Rodrigo Siqueira 2020-08-30 250 return;
18d0952a838ba5 drivers/gpu/drm/vkms/vkms_crc.c Daniel Vetter 2019-06-07 251 /*
18d0952a838ba5 drivers/gpu/drm/vkms/vkms_crc.c Daniel Vetter 2019-06-07 252 * The worker can fall behind the vblank hrtimer, make sure we catch up.
0ca33adb91c0a9 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-09-04 253 */
0ca33adb91c0a9 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-09-04 254 while (frame_start <= frame_end)
0ca33adb91c0a9 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-09-04 255 drm_crtc_add_crc_entry(crtc, true, frame_start++, &crc32);
6c234fe37c5762 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-08-02 256 }
6c234fe37c5762 drivers/gpu/drm/vkms/vkms_crc.c Haneen Mohammed 2018-08-02 257

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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