Re: [PATCH] drm/panel: Replace deprecated DCS display-on calls
From: kernel test robot
Date: Sat Nov 07 2026 - 16:44:33 EST
Hi amit,
kernel test robot noticed the following build warnings:
[auto build test WARNING on v7.4-rc1]
[also build test WARNING on linus/master next-20261105]
[cannot apply to drm-misc/drm-misc-next]
[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#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/amit/drm-panel-Replace-deprecated-DCS-display-on-calls/20261104-093813
base: v7.4-rc1
patch link: https://lore.kernel.org/r/20261104073813.42429-1-amittibi123%40gmail.com
patch subject: [PATCH] drm/panel: Replace deprecated DCS display-on calls
config: loongarch-allmodconfig (https://download.01.org/0day-ci/archive/20261108/202611080509.DZUY4PHf-lkp@xxxxxxxxx/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
rustc: rustc 1.96.0 (ac68faa20 2026-05-25)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261108/202611080509.DZUY4PHf-lkp@xxxxxxxxx/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202611080509.DZUY4PHf-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
>> drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c:356:10: warning: variable 'ret' is uninitialized when used here [-Wuninitialized]
356 | return ret;
| ^~~
drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c:350:9: note: initialize the variable 'ret' to silence this warning
350 | int ret;
| ^
| = 0
1 warning generated.
vim +/ret +356 drivers/gpu/drm/panel/panel-feixin-k101-im2ba02.c
fac47b1ebeda3b5 Icenowy Zheng 2020-01-16 342
fac47b1ebeda3b5 Icenowy Zheng 2020-01-16 343 static int k101_im2ba02_enable(struct drm_panel *panel)
fac47b1ebeda3b5 Icenowy Zheng 2020-01-16 344 {
fac47b1ebeda3b5 Icenowy Zheng 2020-01-16 345 struct k101_im2ba02 *ctx = panel_to_k101_im2ba02(panel);
fac47b1ebeda3b5 Icenowy Zheng 2020-01-16 346 const struct k101_im2ba02_init_cmd *cmd = &timed_cmds[1];
7bb5e5e01ffc36b amit 2026-11-04 347 struct mipi_dsi_multi_context dsi_ctx = {
7bb5e5e01ffc36b amit 2026-11-04 348 .dsi = ctx->dsi,
7bb5e5e01ffc36b amit 2026-11-04 349 };
fac47b1ebeda3b5 Icenowy Zheng 2020-01-16 350 int ret;
fac47b1ebeda3b5 Icenowy Zheng 2020-01-16 351
fac47b1ebeda3b5 Icenowy Zheng 2020-01-16 352 msleep(150);
fac47b1ebeda3b5 Icenowy Zheng 2020-01-16 353
7bb5e5e01ffc36b amit 2026-11-04 354 mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
7bb5e5e01ffc36b amit 2026-11-04 355 if (dsi_ctx.accum_err)
fac47b1ebeda3b5 Icenowy Zheng 2020-01-16 @356 return ret;
fac47b1ebeda3b5 Icenowy Zheng 2020-01-16 357
fac47b1ebeda3b5 Icenowy Zheng 2020-01-16 358 msleep(50);
fac47b1ebeda3b5 Icenowy Zheng 2020-01-16 359
fac47b1ebeda3b5 Icenowy Zheng 2020-01-16 360 return mipi_dsi_dcs_write_buffer(ctx->dsi, cmd->data, K101_IM2BA02_INIT_CMD_LEN);
fac47b1ebeda3b5 Icenowy Zheng 2020-01-16 361 }
fac47b1ebeda3b5 Icenowy Zheng 2020-01-16 362
--
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