kernel/linux.git/drivers/video/fbdev/omap, branch v6.6.132

fbdev: omap: use threaded IRQ for LCD DMA

2025-02-21T12:57:09+00:00

[ Upstream commit e4b6b665df815b4841e71b72f06446884e8aad40 ] When using touchscreen and framebuffer, Nokia 770 crashes easily with: BUG: scheduling while atomic: irq/144-ads7846/82/0x00010000 Modules linked in: usb_f_ecm g_ether usb_f_rndis u_ether libcomposite configfs omap_udc ohci_omap ohci_hcd CPU: 0 UID: 0 PID: 82 Comm: irq/144-ads7846 Not tainted 6.12.7-770 #2 Hardware name: Nokia 770 Call trace: unwind_backtrace from show_stack+0x10/0x14 show_stack from dump_stack_lvl+0x54/0x5c dump_stack_lvl from __schedule_bug+0x50/0x70 __schedule_bug from __schedule+0x4d4/0x5bc __schedule from schedule+0x34/0xa0 schedule from schedule_preempt_disabled+0xc/0x10 schedule_preempt_disabled from __mutex_lock.constprop.0+0x218/0x3b4 __mutex_lock.constprop.0 from clk_prepare_lock+0x38/0xe4 clk_prepare_lock from clk_set_rate+0x18/0x154 clk_set_rate from sossi_read_data+0x4c/0x168 sossi_read_data from hwa742_read_reg+0x5c/0x8c hwa742_read_reg from send_frame_handler+0xfc/0x300 send_frame_handler from process_pending_requests+0x74/0xd0 process_pending_requests from lcd_dma_irq_handler+0x50/0x74 lcd_dma_irq_handler from __handle_irq_event_percpu+0x44/0x130 __handle_irq_event_percpu from handle_irq_event+0x28/0x68 handle_irq_event from handle_level_irq+0x9c/0x170 handle_level_irq from generic_handle_domain_irq+0x2c/0x3c generic_handle_domain_irq from omap1_handle_irq+0x40/0x8c omap1_handle_irq from generic_handle_arch_irq+0x28/0x3c generic_handle_arch_irq from call_with_stack+0x1c/0x24 call_with_stack from __irq_svc+0x94/0xa8 Exception stack(0xc5255da0 to 0xc5255de8) 5da0: 00000001 c22fc620 00000000 00000000 c08384a8 c106fc00 00000000 c240c248 5dc0: c113a600 c3f6ec30 00000001 00000000 c22fc620 c5255df0 c22fc620 c0279a94 5de0: 60000013 ffffffff __irq_svc from clk_prepare_lock+0x4c/0xe4 clk_prepare_lock from clk_get_rate+0x10/0x74 clk_get_rate from uwire_setup_transfer+0x40/0x180 uwire_setup_transfer from spi_bitbang_transfer_one+0x2c/0x9c spi_bitbang_transfer_one from spi_transfer_one_message+0x2d0/0x664 spi_transfer_one_message from __spi_pump_transfer_message+0x29c/0x498 __spi_pump_transfer_message from __spi_sync+0x1f8/0x2e8 __spi_sync from spi_sync+0x24/0x40 spi_sync from ads7846_halfd_read_state+0x5c/0x1c0 ads7846_halfd_read_state from ads7846_irq+0x58/0x348 ads7846_irq from irq_thread_fn+0x1c/0x78 irq_thread_fn from irq_thread+0x120/0x228 irq_thread from kthread+0xc8/0xe8 kthread from ret_from_fork+0x14/0x28 As a quick fix, switch to a threaded IRQ which provides a stable system. Signed-off-by: Aaro Koskinen Reviewed-by: Linus Walleij Signed-off-by: Helge Deller Signed-off-by: Sasha Levin

fbdev: omapfb: fix some error codes

2023-10-16T21:04:26+00:00

Return negative -ENXIO instead of positive ENXIO. Signed-off-by: Dan Carpenter Signed-off-by: Helge Deller

fbdev/omapfb: Use fbdev I/O helpers

2023-08-04T13:54:37+00:00

Set struct fb_ops and with FB_DEFAULT_IOMEM_OPS, fbdev's initializer for I/O memory. Sets the callbacks to the cfb_ and fb_io_ functions. Select the correct modules with Kconfig's FB_IOMEM_HELPERS token. The macro and token set the currently selected values, so there is no functional change. v3: * use _IOMEM_ in commit message v2: * updated to use _IOMEM_ tokens Signed-off-by: Thomas Zimmermann Reviewed-by: Sam Ravnborg Acked-by: Helge Deller Link: https://patchwork.freedesktop.org/patch/msgid/20230803184034.6456-30-tzimmermann@suse.de

fbdev: Remove FBINFO_FLAG_DEFAULT from framebuffer_alloc()'ed structs

2023-07-24T14:50:39+00:00

The flag FBINFO_FLAG_DEFAULT is 0 and has no effect, as struct fbinfo.flags has been allocated to zero by framebuffer_alloc(). So do not set it. Flags should signal differences from the default values. After cleaning up all occurrences of FBINFO_DEFAULT, the token will be removed. v4: * clarify commit message (Geert, Dan) v2: * fix commit message (Miguel) Signed-off-by: Thomas Zimmermann Acked-by: Sam Ravnborg Cc: Jaya Kumar Cc: Helge Deller Cc: Peter Jones Cc: Sascha Hauer Cc: Pengutronix Kernel Team Cc: Shawn Guo Cc: Fabio Estevam Cc: NXP Linux Team Cc: Maik Broemme Cc: Jingoo Han Cc: Sudip Mukherjee Cc: Teddy Wang Cc: Michal Januszewski Link: https://patchwork.freedesktop.org/patch/msgid/20230715185343.7193-15-tzimmermann@suse.de

Merge tag 'fbdev-for-6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev

2023-06-29T17:20:38+00:00

Pull fbdev updates from Helge Deller: "Some fbdev fixes & cleanups. Includes is a fix for a potential out-of-bound memory access in fast_imageblit() and the switch of the VIA fbdev driver to use GPIO descriptors. Summary: - fix potential OOB read in fast_imageblit() - fbdev/media: Use GPIO descriptors for VIA GPIO - broadsheetfb & metronomefb: Add MODULE_FIRMWARE macro - omapfb: error handling fix in mipid_spi_probe() - sh_mobile_lcdcfb, sh7760fb: Typo and warning fixes - hitfb: code cleanups" * tag 'fbdev-for-6.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev: fbdev: fix potential OOB read in fast_imageblit() MAINTAINERS: adjust entry in VIA UNICHROME(PRO)/CHROME9 FRAMEBUFFER DRIVER fbdev: sh7760fb: Fix -Wimplicit-fallthrough warnings fbdev: sh_mobile_lcdcfb: Fix ARGB32 overlay format typo fbdev: hitfb: Use NULL for pointers fbdev: hitfb: Fix integer-to-pointer cast fbdev/media: Use GPIO descriptors for VIA GPIO video/hdmi: Reorder fields in 'struct hdmi_avi_infoframe' fbdev: broadsheetfb: Add MODULE_FIRMWARE macro fbdev: metronomefb: Add MODULE_FIRMWARE macro fbdev: hitfb: Declare hitfb_blank() as static fbdev: omapfb: lcd_mipid: Fix an error handling path in mipid_spi_probe()

fbdev: omapfb: lcd_mipid: Fix an error handling path in mipid_spi_probe()

2023-06-05T09:34:36+00:00

If 'mipid_detect()' fails, we must free 'md' to avoid a memory leak. Fixes: 66d2f99d0bb5 ("omapfb: add support for MIPI-DCS compatible LCDs") Signed-off-by: Christophe JAILLET Signed-off-by: Helge Deller

Input: ads7846 - Convert to use software nodes

2023-05-24T13:01:30+00:00

The Nokia 770 is using GPIOs from the global numberspace on the CBUS node to pass down to the LCD controller. This regresses when we let the OMAP GPIO driver use dynamic GPIO base. The Nokia 770 now has dynamic allocation of IRQ numbers, so this needs to be fixed for it to work. As this is the only user of LCD MIPID we can easily augment the driver to use a GPIO descriptor instead and resolve the issue. The platform data .shutdown() callback wasn't even used in the code, but we encode a shutdown asserting RESET in the remove() callback for completeness sake. The CBUS also has the ADS7846 touchscreen attached. Populate the devices on the Nokia 770 CBUS I2C using software nodes instead of platform data quirks. This includes the LCD and the ADS7846 touchscreen so the conversion just brings the LCD along with it as software nodes is an all-or-nothing design pattern. The ADS7846 has some limited support for using GPIO descriptors, let's convert it over completely to using device properties and then fix all remaining boardfile users to provide all platform data using software nodes. Dump the of includes and of_match_ptr() in the ADS7846 driver as part of the job. Since we have to move ADS7846 over to obtaining the GPIOs it is using exclusively from descriptors, we provide descriptor tables for the two remaining in-kernel boardfiles using ADS7846: - PXA Spitz - MIPS Alchemy DB1000 development board It was too hard for me to include software node conversion of these two remaining users at this time: the spitz is using a hscync callback in the platform data that would require further GPIO descriptor conversion of the Spitz, and moving the hsync callback down into the driver: it will just become too big of a job, but it can be done separately. The MIPS Alchemy DB1000 is simply something I cannot test, so take the easier approach of just providing some GPIO descriptors in this case as I don't want the patch to grow too intrusive. As we see that several device trees have incorrect polarity flags and just expect to bypass the gpiolib polarity handling, fix up all device trees too, in a separate patch. Suggested-by: Dmitry Torokhov Fixes: 92bf78b33b0b ("gpio: omap: use dynamic allocation of base") Acked-by: Dmitry Torokhov Reviewed-by: Dmitry Torokhov Signed-off-by: Linus Walleij

fbdev: omapfb: Convert to platform remove callback returning void

2023-04-24T09:48:31+00:00

The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is (mostly) ignored and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new() which already returns void. Trivially convert this driver from always returning zero in the remove callback to the void returning variant. Signed-off-by: Uwe Kleine-König Signed-off-by: Helge Deller

fbdev: omapfb: remove omap1 osk driver

2023-03-14T17:49:47+00:00

Commit 21a3e6eed423 ("ARM: omap1: remove osk-mistral add-on board support") removed the platform_device definition for the "lcd_osk" device, so this driver is now unused and can be removed as well. Signed-off-by: Arnd Bergmann Signed-off-by: Helge Deller

fbdev: omapfb: cleanup inconsistent indentation

2023-03-14T17:49:39+00:00

This cleans up the indentation according to the Linux kernel coding style, and should fix the warning created by the kernel test robot. Fixes: 8b08cf2b64f5 ("OMAP: add TI OMAP framebuffer driver") Reported-by: kernel test robot Signed-off-by: Lucy Mielke Signed-off-by: Helge Deller