kernel/linux.git/drivers/gpu/drm/panel, branch v6.13.6

drm: panel: jd9365da-h3: fix reset signal polarity

2025-02-27T12:34:18+00:00

commit a8972d5a49b408248294b5ecbdd0a085e4726349 upstream. In jadard_prepare() a reset pulse is generated with the following statements (delays ommited for clarity): gpiod_set_value(jadard->reset, 1); --> Deassert reset gpiod_set_value(jadard->reset, 0); --> Assert reset for 10ms gpiod_set_value(jadard->reset, 1); --> Deassert reset However, specifying second argument of "0" to gpiod_set_value() means to deassert the GPIO, and "1" means to assert it. If the reset signal is defined as GPIO_ACTIVE_LOW in the DTS, the above statements will incorrectly generate the reset pulse (inverted) and leave it asserted (LOW) at the end of jadard_prepare(). Fix reset behavior by inverting gpiod_set_value() second argument in jadard_prepare(). Also modify second argument to devm_gpiod_get() in jadard_dsi_probe() to assert the reset when probing. Do not modify it in jadard_unprepare() as it is already properly asserted with "1", which seems to be the intended behavior. Fixes: 6b818c533dd8 ("drm: panel: Add Jadard JD9365DA-H3 DSI panel") Cc: stable@vger.kernel.org Signed-off-by: Hugo Villeneuve Reviewed-by: Neil Armstrong Reviewed-by: Linus Walleij Link: https://lore.kernel.org/r/20240927135306.857617-1-hugo@hugovil.com Signed-off-by: Neil Armstrong Link: https://patchwork.freedesktop.org/patch/msgid/20240927135306.857617-1-hugo@hugovil.com Signed-off-by: Greg Kroah-Hartman

Merge tag 'drm-misc-fixes-2024-12-19' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-fixes

2024-12-19T21:13:45+00:00

drm-misc-fixes for v6.13-rc4: - udma-buf fixes related to sealing. - dma-buf build warning fix when debugfs is not enabled. - Assorted drm/panel fixes. - Correct error return in drm_dp_tunnel_mgr_create. - Fix even more divide by zero in drm_mode_vrefresh. - Fix FBDEV dependencies in Kconfig. - Documentation fix for drm_sched_fini. - IVPU NULL pointer, memory leak and WARN fix. Signed-off-by: Dave Airlie From: Maarten Lankhorst Link: https://patchwork.freedesktop.org/patch/msgid/d0763051-87b7-483e-89e0-a9f993383450@linux.intel.com

drm/panel: synaptics-r63353: Fix regulator unbalance

2024-12-13T09:52:07+00:00

The shutdown function can be called when the display is already unprepared. For example during reboot this trigger a kernel backlog. Calling the drm_panel_unprepare, allow us to avoid to trigger the kernel warning. Fixes: 2e87bad7cd33 ("drm/panel: Add Synaptics R63353 panel driver") Tested-by: Dario Binacchi Signed-off-by: Michael Trimarchi Signed-off-by: Dario Binacchi Reviewed-by: Neil Armstrong Reviewed-by: Jessica Zhang Link: https://lore.kernel.org/r/20241205163002.1804784-1-dario.binacchi@amarulasolutions.com Signed-off-by: Neil Armstrong Link: https://patchwork.freedesktop.org/patch/msgid/20241205163002.1804784-1-dario.binacchi@amarulasolutions.com

drm/panel: st7701: Add prepare_prev_first flag to drm_panel

2024-12-13T09:51:56+00:00

The DSI host must be enabled for the panel to be initialized in prepare(). Set the prepare_prev_first flag to guarantee this. This fixes the panel operation on NXP i.MX8MP SoC / Samsung DSIM DSI host. Fixes: 849b2e3ff969 ("drm/panel: Add Sitronix ST7701 panel driver") Signed-off-by: Marek Vasut Reviewed-by: Jessica Zhang Link: https://lore.kernel.org/r/20241124224812.150263-1-marex@denx.de Signed-off-by: Neil Armstrong Link: https://patchwork.freedesktop.org/patch/msgid/20241124224812.150263-1-marex@denx.de

drm/panel: novatek-nt35950: fix return value check in nt35950_probe()

2024-12-13T09:51:39+00:00

mipi_dsi_device_register_full() never returns NULL pointer, it will return ERR_PTR() when it fails, so replace the check with IS_ERR(). Fixes: 623a3531e9cf ("drm/panel: Add driver for Novatek NT35950 DSI DriverIC panels") Signed-off-by: Yang Yingliang Reviewed-by: Neil Armstrong Link: https://lore.kernel.org/r/20241029123957.1588-1-yangyingliang@huaweicloud.com Signed-off-by: Neil Armstrong Link: https://patchwork.freedesktop.org/patch/msgid/20241029123957.1588-1-yangyingliang@huaweicloud.com

drm/panel: himax-hx83102: Add a check to prevent NULL pointer dereference

2024-12-13T09:51:24+00:00

drm_mode_duplicate() could return NULL due to lack of memory, which will then call NULL pointer dereference. Add a check to prevent it. Fixes: 0ef94554dc40 ("drm/panel: himax-hx83102: Break out as separate driver") Signed-off-by: Zhang Zekun Reviewed-by: Neil Armstrong Link: https://lore.kernel.org/r/20241025073408.27481-3-zhangzekun11@huawei.com Signed-off-by: Neil Armstrong Link: https://patchwork.freedesktop.org/patch/msgid/20241025073408.27481-3-zhangzekun11@huawei.com

Get rid of 'remove_new' relic from platform driver struct

2024-12-01T23:12:43+00:00

The continual trickle of small conversion patches is grating on me, and is really not helping. Just get rid of the 'remove_new' member function, which is just an alias for the plain 'remove', and had a comment to that effect: /* * .remove_new() is a relic from a prototype conversion of .remove(). * New drivers are supposed to implement .remove(). Once all drivers are * converted to not use .remove_new any more, it will be dropped. */ This was just a tree-wide 'sed' script that replaced '.remove_new' with '.remove', with some care taken to turn a subsequent tab into two tabs to make things line up. I did do some minimal manual whitespace adjustment for places that used spaces to line things up. Then I just removed the old (sic) .remove_new member function, and this is the end result. No more unnecessary conversion noise. Signed-off-by: Linus Torvalds

Backmerge v6.12-rc6 of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into drm-next

2024-11-04T04:25:33+00:00

Backmerge Linus tree for some drm-fixes needed for msm and xe merges. Signed-off-by: Dave Airlie

drm/panel: leadtek-ltk050h3146w: transition to mipi_dsi wrapped functions

2024-10-31T09:36:55+00:00

Changes the leadtek-ltk050h3146w panel to use multi style functions for improved error handling. Signed-off-by: Tejas Vipin Reviewed-by: Douglas Anderson Reviewed-by: Neil Armstrong Link: https://lore.kernel.org/r/20241026035928.183454-1-tejasvipin76@gmail.com Signed-off-by: Neil Armstrong Link: https://patchwork.freedesktop.org/patch/msgid/20241026035928.183454-1-tejasvipin76@gmail.com

drm/panel: samsung-s6e88a0-ams427ap24: Add flip option

2024-10-31T09:36:36+00:00

The way of implementing a flip option follows the existing panel-samsung-s6e8aa0.c [1][2][3]. The value to flip the screen is taken from a downstream kernel file of a similar but older panel [4]. The mipi clock [5] for the new panel samsung-s6e88a0-ams427ap24 matches 461 MHz and a hardware read-out of the 0xcb values corresponds to revision R01 of that older panel [6]. Although for samsung-s6e88a0-ams427ap24 that's in non-flipped state while in this older driver it seems to be the other way around. Further up there is a hint [7] basically saying for revision R01 to change the first word of the 0xcb command from 0x06 to 0x0e, which is actually setting BIT(3) of that word. This causes a horizontal flip. [1] https://github.com/torvalds/linux/blob/v6.11/drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c#L103 [2] https://github.com/torvalds/linux/blob/v6.11/drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c#L207-L211 [3] https://github.com/torvalds/linux/blob/v6.11/drivers/gpu/drm/panel/panel-samsung-s6e8aa0.c#L954-L974 [4] https://github.com/LineageOS/android_kernel_samsung_msm8930-common/blob/lineage-15.1/drivers/video/msm/mipi_samsung_oled_video_qhd_pt-8930.c [5] https://github.com/LineageOS/android_kernel_samsung_msm8930-common/blob/lineage-15.1/drivers/video/msm/mipi_samsung_oled_video_qhd_pt-8930.c#L2027-L2028 [6] https://github.com/LineageOS/android_kernel_samsung_msm8930-common/blob/lineage-15.1/drivers/video/msm/mipi_samsung_oled_video_qhd_pt-8930.c#L137-L151 [7] https://github.com/LineageOS/android_kernel_samsung_msm8930-common/blob/lineage-15.1/drivers/video/msm/mipi_samsung_oled_video_qhd_pt-8930.c#L66-L74 Signed-off-by: Jakob Hauser Reviewed-by: Neil Armstrong Reviewed-by: Linus Walleij Link: https://lore.kernel.org/r/1491f275e9956b2da1f1e2580abd54f4e459c7d2.1730070570.git.jahau@rocketmail.com Signed-off-by: Neil Armstrong Link: https://patchwork.freedesktop.org/patch/msgid/1491f275e9956b2da1f1e2580abd54f4e459c7d2.1730070570.git.jahau@rocketmail.com