kernel/linux.git/drivers/gpu/drm/tegra/dsi.c, branch v5.10.263

drm/tegra: dsi: fix device leak on probe

2026-04-18T08:30:50+00:00

[ Upstream commit bfef062695570842cf96358f2f46f4c6642c6689 ] Make sure to drop the reference taken when looking up the companion (ganged) device and its driver data during probe(). Note that holding a reference to a device does not prevent its driver data from going away so there is no point in keeping the reference. Fixes: e94236cde4d5 ("drm/tegra: dsi: Add ganged mode support") Fixes: 221e3638feb8 ("drm/tegra: Fix reference leak in tegra_dsi_ganged_probe") Cc: stable@vger.kernel.org # 3.19: 221e3638feb8 Cc: Thierry Reding Signed-off-by: Johan Hovold Signed-off-by: Thierry Reding Link: https://patch.msgid.link/20251121164201.13188-1-johan@kernel.org Signed-off-by: Sasha Levin

drm/tegra: dsi: Fix missing pm_runtime_disable() in the error handling path of tegra_dsi_probe()

2024-03-26T22:21:54+00:00

[ Upstream commit 5286a9fc280c45b6b307ee1b07f7a997e042252c ] If an error occurs after calling pm_runtime_enable(), pm_runtime_disable() should be called as already done in the remove function. Fixes: ef8187d75265 ("drm/tegra: dsi: Implement runtime PM") Signed-off-by: Christophe JAILLET Signed-off-by: Thierry Reding Link: https://patchwork.freedesktop.org/patch/msgid/ee4a15c9cd4b574a55cd67c30d2411239ba2cee9.1693667005.git.christophe.jaillet@wanadoo.fr Signed-off-by: Sasha Levin

drm/tegra: dsi: Fix some error handling paths in tegra_dsi_probe()

2024-03-26T22:21:54+00:00

[ Upstream commit 830c1ded356369cd1303e8bb87ce3fea6e744de8 ] If an error occurs after calling tegra_output_probe(), tegra_output_remove() should be called as already done in the remove function. Fixes: dec727399a4b ("drm/tegra: Add DSI support") Signed-off-by: Christophe JAILLET Signed-off-by: Thierry Reding Link: https://patchwork.freedesktop.org/patch/msgid/16820073278d031f6c474a08d5f22a255158585e.1693667005.git.christophe.jaillet@wanadoo.fr Signed-off-by: Sasha Levin

drm/tegra: dsi: Make use of the helper function dev_err_probe()

2024-03-26T22:21:54+00:00

[ Upstream commit fc75e4fcbd1e4252a0481ebb23cd4516c127a8e2 ] When possible use dev_err_probe help to properly deal with the PROBE_DEFER error, the benefit is that DEFER issue will be logged in the devices_deferred debugfs file. And using dev_err_probe() can reduce code size, the error value gets printed. Signed-off-by: Cai Huoqing Signed-off-by: Thierry Reding Stable-dep-of: 830c1ded3563 ("drm/tegra: dsi: Fix some error handling paths in tegra_dsi_probe()") Signed-off-by: Sasha Levin

drm/tegra: dsi: Add missing check for of_find_device_by_node

2024-03-26T22:21:54+00:00

[ Upstream commit afe6fcb9775882230cd29b529203eabd5d2a638d ] Add check for the return value of of_find_device_by_node() and return the error if it fails in order to avoid NULL pointer dereference. Fixes: e94236cde4d5 ("drm/tegra: dsi: Add ganged mode support") Signed-off-by: Chen Ni Signed-off-by: Thierry Reding Link: https://patchwork.freedesktop.org/patch/msgid/20231024080738.825553-1-nichen@iscas.ac.cn Signed-off-by: Sasha Levin

drm/tegra: Fix reference leak in tegra_dsi_ganged_probe

2022-04-08T12:40:18+00:00

[ Upstream commit 221e3638feb8bc42143833c9a704fa89b6c366bb ] The reference taken by 'of_find_device_by_node()' must be released when not needed anymore. Add put_device() call to fix this. Fixes: e94236cde4d5 ("drm/tegra: dsi: Add ganged mode support") Signed-off-by: Miaoqian Lin Signed-off-by: Thierry Reding Signed-off-by: Sasha Levin

drm/tegra: Fix reference leak when pm_runtime_get_sync() fails

2021-03-04T10:37:42+00:00

[ Upstream commit dcdfe2712b68f1e9dbf4f1a96ad59b80e5cc0ef7 ] The PM reference count is not expected to be incremented on return in these Tegra functions. However, pm_runtime_get_sync() will increment the PM reference count even on failure. Forgetting to put the reference again will result in a leak. Replace it with pm_runtime_resume_and_get() to keep the usage counter balanced. Fixes: fd67e9c6ed5a ("drm/tegra: Do not implement runtime PM") Reported-by: Hulk Robot Signed-off-by: Qinglang Miao Signed-off-by: Thierry Reding Signed-off-by: Sasha Levin

Merge tag 'drm-next-2020-10-15' of git://anongit.freedesktop.org/drm/drm

2020-10-15T17:46:16+00:00

Pull drm updates from Dave Airlie: "Not a major amount of change, the i915 trees got split into display and gt trees to better facilitate higher level review, and there's a major refactoring of i915 GEM locking to use more core kernel concepts (like ww-mutexes). msm gets per-process pagetables, older AMD SI cards get DC support, nouveau got a bump in displayport support with common code extraction from i915. Outside of drm this contains a couple of patches for hexint moduleparams which you've acked, and a virtio common code tree that you should also get via it's regular path. New driver: - Cadence MHDP8546 DisplayPort bridge driver core: - cross-driver scatterlist cleanups - devm_drm conversions - remove drm_dev_init - devm_drm_dev_alloc conversion ttm: - lots of refactoring and cleanups bridges: - chained bridge support in more drivers panel: - misc new panels scheduler: - cleanup priority levels displayport: - refactor i915 code into helpers for nouveau i915: - split into display and GT trees - WW locking refactoring in GEM - execbuf2 extension mechanism - syncobj timeline support - GEN 12 HOBL display powersaving - Rocket Lake display additions - Disable FBC on Tigerlake - Tigerlake Type-C + DP improvements - Hotplug interrupt refactoring amdgpu: - Sienna Cichlid updates - Navy Flounder updates - DCE6 (SI) support for DC - Plane rotation enabled - TMZ state info ioctl - PCIe DPC recovery support - DC interrupt handling refactor - OLED panel fixes amdkfd: - add SMI events for thermal throttling - SMI interface events ioctl update - process eviction counters radeon: - move to dma_ for allocations - expose sclk via sysfs msm: - DSI support for sm8150/sm8250 - per-process GPU pagetable support - Displayport support mediatek: - move HDMI phy driver to PHY - convert mtk-dpi to bridge API - disable mt2701 tmds tegra: - bridge support exynos: - misc cleanups vc4: - dual display cleanups ast: - cleanups gma500: - conversion to GPIOd API hisilicon: - misc reworks ingenic: - clock handling and format improvements mcde: - DSI support mgag200: - desktop g200 support mxsfb: - i.MX7 + i.MX8M - alpha plane support panfrost: - devfreq support - amlogic SoC support ps8640: - EDID from eDP retrieval tidss: - AM65xx YUV workaround virtio: - virtio-gpu exported resources rcar-du: - R8A7742, R8A774E1 and R8A77961 support - YUV planar format fixes - non-visible plane handling - VSP device reference count fix - Kconfig fix to avoid displaying disabled options in .config" * tag 'drm-next-2020-10-15' of git://anongit.freedesktop.org/drm/drm: (1494 commits) drm/ingenic: Fix bad revert drm/amdgpu: Fix invalid number of character '{' in amdgpu_acpi_init drm/amdgpu: Remove warning for virtual_display drm/amdgpu: kfd_initialized can be static drm/amd/pm: setup APU dpm clock table in SMU HW initialization drm/amdgpu: prevent spurious warning drm/amdgpu/swsmu: fix ARC build errors drm/amd/display: Fix OPTC_DATA_FORMAT programming drm/amd/display: Don't allow pstate if no support in blank drm/panfrost: increase readl_relaxed_poll_timeout values MAINTAINERS: Update entry for st7703 driver after the rename Revert "gpu/drm: ingenic: Add option to mmap GEM buffers cached" drm/amd/display: HDMI remote sink need mode validation for Linux drm/amd/display: Change to correct unit on audio rate drm/amd/display: Avoid set zero in the requested clk drm/amdgpu: align frag_end to covered address space drm/amdgpu: fix NULL pointer dereference for Renoir drm/vmwgfx: fix regression in thp code due to ttm init refactor. drm/amdgpu/swsmu: add interrupt work handler for smu11 parts drm/amdgpu/swsmu: add interrupt work function ...

media: gpu: host1x: mipi: Keep MIPI clock enabled and mutex locked till calibration done

2020-08-28T13:12:38+00:00

With the split of MIPI calibration into tegra_mipi_calibrate() and tegra_mipi_wait(), MIPI clock is not kept enabled and mutex is not locked till the calibration is done. So, this patch keeps MIPI clock enabled and mutex locked after triggering start of calibration till its done. To let calibration process go through its finite sequence codes before calibration logic waiting for pads idle state added wait time of 75usec to make sure it sees idle state to apply the results. This patch renames tegra_mipi_calibrate() as tegra_mipi_start_calibration() and tegra_mipi_wait() as tegra_mipi_finish_calibration() to be inline with their usage. Reviewed-by: Dmitry Osipenko Signed-off-by: Sowjanya Komatineni Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

Merge drm/drm-next into drm-misc-next

2020-08-12T18:42:08+00:00

Backmerging drm-next into drm-misc-next for nouveau and panel updates. Resolves a conflict between ttm and nouveau, where struct ttm_mem_res got renamed to struct ttm_resource. Signed-off-by: Thomas Zimmermann