Linux kernel documentation tree maintained by Jonathan Corbet http://mirrors.hust.edu.cn/git/lwn.git/atom?h=docs-fixes 2026-01-13T08:52:44+00:00 2026-01-13T08:52:44+00:00 Tuo Li islituo@gmail.com 2025-12-18T12:09:55+00:00 urn:sha1:95eed73b871111123a8b1d31cb1fce7e902e49ea In jdi_panel_dsi_remove(), jdi is explicitly checked, indicating that it may be NULL: if (!jdi) mipi_dsi_detach(dsi); However, when jdi is NULL, the function does not return and continues by calling jdi_panel_disable(): err = jdi_panel_disable(&jdi->base); Inside jdi_panel_disable(), jdi is dereferenced unconditionally, which can lead to a NULL-pointer dereference: struct jdi_panel *jdi = to_panel_jdi(panel); backlight_disable(jdi->backlight); To prevent such a potential NULL-pointer dereference, return early from jdi_panel_dsi_remove() when jdi is NULL. Signed-off-by: Tuo Li <islituo@gmail.com> Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> Link: https://patch.msgid.link/20251218120955.11185-1-islituo@gmail.com 2025-08-21T14:44:05+00:00 Dan Carpenter dan.carpenter@linaro.org 2025-08-21T12:30:54+00:00 urn:sha1:61ce50fd8196c8782b9620bb60d33649ec429f64 If the mipi_dsi_dual() macro fails, the error code is stored in dsi_ctx.accum_err. Propagate that error back to the caller instead of returning success as the current code does. Fixes: a6adf47d30cc ("drm/panel: jdi-lpm102a188a: Fix bug and clean up driver") Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org> Reviewed-by: Douglas Anderson <dianders@chromium.org> Signed-off-by: Douglas Anderson <dianders@chromium.org> Link: https://lore.kernel.org/r/aKcRfq8xBrFmhqmO@stanley.mountain 2025-07-29T15:28:41+00:00 Brigham Campbell me@brighamcampbell.com 2025-07-22T01:53:09+00:00 urn:sha1:a6adf47d30cccaf3c1936ac9de94948c140e17dd Fix bug in unprepare() which causes the function's return value to be that of the last mipi "enter sleep mode" command. Update driver to use the "multi" variant of MIPI functions in order to facilitate improved error handling and remove the panel's dependency on deprecated MIPI functions. Use the new mipi_dsi_dual macro to reduce code duplication. Reviewed-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Diogo Ivo <diogo.ivo@tecnico.ulisboa.pt> Tested-by: Diogo Ivo <diogo.ivo@tecnico.ulisboa.pt> Signed-off-by: Brigham Campbell <me@brighamcampbell.com> Signed-off-by: Douglas Anderson <dianders@chromium.org> Link: https://lore.kernel.org/r/20250722015313.561966-3-me@brighamcampbell.com 2025-07-16T14:58:13+00:00 Anusha Srivatsa asrivats@redhat.com 2025-07-11T04:31:21+00:00 urn:sha1:d29ab79c6f59a626028dac3c5177648e4417bd3f Move to using the new API devm_drm_panel_alloc() to allocate the panel. In the call to the new API, avoid using explicit type and use __typeof() for more type safety. Signed-off-by: Anusha Srivatsa <asrivats@redhat.com> Link: https://lore.kernel.org/r/20250710-b4-driver-convert-last-part-july-v1-10-de73ba81b2f5@redhat.com Signed-off-by: Maxime Ripard <mripard@kernel.org> 2023-08-16T16:54:42+00:00 Diogo Ivo diogo.ivo@tecnico.ulisboa.pt 2023-08-07T13:33:02+00:00 urn:sha1:25205087df1ffe06ccea9302944ed1f77dc68c6f The JDI LPM102A188A is a 2560x1800 IPS panel found in the Google Pixel C. This driver is based on the downstream GPLv2 driver released by Google written by Sean Paul [1], which was then adapted to the newer kernel APIs. [1]: https://android.googlesource.com/kernel/tegra/+/refs/heads/android-tegra-dragon-3.18-oreo/drivers/gpu/drm/panel/panel-jdi-lpm102a188a.c Signed-off-by: Diogo Ivo <diogo.ivo@tecnico.ulisboa.pt> Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org> Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20230807133307.27456-3-diogo.ivo@tecnico.ulisboa.pt