- 06 May, 2019 2 commits
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Kefeng Wang authored
Using dev_get_drvdata directly. Signed-off-by:
Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Wan ZongShun <mcuos.com@gmail.com> Cc: Kukjin Kim <kgene@kernel.org> Cc: Krzysztof Kozlowski <krzk@kernel.org> Cc: Michal Januszewski <spock@gentoo.org> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by:
Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
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Andreas Schwab authored
When the logo is currently drawn on a virtual console, and the console loglevel is reduced to quiet, logo_shown must be left alone, so that it the scrolling region on that virtual console is properly reset. Fixes: 10993504 ("fbcon: Silence fbcon logo on 'quiet' boots") Signed-off-by:
Andreas Schwab <schwab@linux-m68k.org> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Yisheng Xie <ysxie@foxmail.com> Cc: Kees Cook <keescook@chromium.org> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Marko Myllynen <myllynen@redhat.com> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Thierry Reding <treding@nvidia.com> Signed-off-by:
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- 11 Apr, 2019 5 commits
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YueHaibing authored
Fixes gcc '-Wunused-but-set-variable' warning: drivers/video/fbdev/atmel_lcdfb.c: In function 'atmel_lcdfb_remove': drivers/video/fbdev/atmel_lcdfb.c:1255:28: warning: variable 'pdata' set but not used [-Wunused-but-set-variable] It's not used since commit 42110e91 ("video: atmel_lcdfb: introduce atmel_lcdfb_power_control") Signed-off-by:
YueHaibing <yuehaibing@huawei.com> Acked-by:
Nicolas Ferre <nicolas.ferre@microchip.com> Cc: Alexandre Belloni <alexandre.belloni@bootlin.com> Cc: Ludovic Desroches <ludovic.desroches@microchip.com> Signed-off-by:
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YueHaibing authored
Fixes gcc '-Wunused-but-set-variable' warning: drivers/video/fbdev/mxsfb.c: In function 'mxsfb_restore_mode': drivers/video/fbdev/mxsfb.c:633:11: warning: variable 'line_count' set but not used [-Wunused-but-set-variable] It's never used since introduction in commit f0a523b5 ("video: Add i.MX23/28 framebuffer driver") and can be removed. Signed-off-by:
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YueHaibing authored
Fixes gcc '-Wunused-but-set-variable' warning: drivers/video/fbdev/pvr2fb.c: In function 'pvr2fb_init': drivers/video/fbdev/pvr2fb.c:1074:6: warning: variable 'size' set but not used [-Wunused-but-set-variable] It's not used since commit 9cd1c674 ("pvr2fb: Fix oops when pseudo_palette is written") Signed-off-by:
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Jiufei Xue authored
Syzkaller hit 'WARNING in __alloc_pages_nodemask' bug. WARNING: CPU: 1 PID: 1473 at mm/page_alloc.c:4377 __alloc_pages_nodemask+0x4da/0x2130 Kernel panic - not syncing: panic_on_warn set ... Call Trace: alloc_pages_current+0xb1/0x1e0 kmalloc_order+0x1f/0x60 kmalloc_order_trace+0x1d/0x120 fb_alloc_cmap_gfp+0x85/0x2b0 fb_set_user_cmap+0xff/0x370 do_fb_ioctl+0x949/0xa20 fb_ioctl+0xdd/0x120 do_vfs_ioctl+0x186/0x1070 ksys_ioctl+0x89/0xa0 __x64_sys_ioctl+0x74/0xb0 do_syscall_64+0xc8/0x550 entry_SYSCALL_64_after_hwframe+0x49/0xbe This is a warning about order >= MAX_ORDER and the order is from userspace ioctl. Add flag __NOWARN to silence this warning. Signed-off-by:
Jiufei Xue <jiufei.xue@linux.alibaba.com> Signed-off-by:
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Linus Walleij authored
These board families are now handled in the DRM subsystem where we can have reusable panel drivers and some other stuff. The PL111 there is now the driver used in the defconfig for Versatile and Nomadik so no need to keep this code around. There are a few minor machines in arch/arm/ such as mach-netx still using the old driver, so we need to keep the core fbdev driver around for some time. Signed-off-by:
Linus Walleij <linus.walleij@linaro.org> Cc: Russell King <linux@armlinux.org.uk> Signed-off-by:
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- 02 Apr, 2019 1 commit
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Yifeng Li authored
A fallthrough in switch/case was introduced in f627caf5 ("fbdev: sm712fb: fix crashes and garbled display during DPMS modesetting"), due to my copy-paste error, which would cause the memory clock frequency for SM720 to be programmed to SM712. Since it only reprograms the clock to a different frequency, it's only a benign issue without visible side-effect, so it also evaded Sudip Mukherjee's code review and regression tests. scripts/checkpatch.pl also failed to discover the issue, possibly due to nested switch statements. This issue was found by Stephen Rothwell by building linux-next with -Wimplicit-fallthrough. Reported-by:
Stephen Rothwell <sfr@canb.auug.org.au> Fixes: f627caf5 ("fbdev: sm712fb: fix crashes and garbled display during DPMS modesetting") Signed-off-by:
Yifeng Li <tomli@tomli.me> Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com> Cc: "Gustavo A. R. Silva" <gustavo@embeddedor.com> Cc: Kees Cook <keescook@chromium.org> Signed-off-by:
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- 01 Apr, 2019 31 commits
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Shile Zhang authored
To fix following divide-by-zero error found by Syzkaller: divide error: 0000 [#1] SMP PTI CPU: 7 PID: 8447 Comm: test Kdump: loaded Not tainted 4.19.24-8.al7.x86_64 #1 Hardware name: Alibaba Cloud Alibaba Cloud ECS, BIOS rel-1.12.0-0-ga698c8995f-prebuilt.qemu.org 04/01/2014 RIP: 0010:fb_var_to_videomode+0xae/0xc0 Code: 04 44 03 46 78 03 4e 7c 44 03 46 68 03 4e 70 89 ce d1 ee 69 c0 e8 03 00 00 f6 c2 01 0f 45 ce 83 e2 02 8d 34 09 0f 45 ce 31 d2 <41> f7 f0 31 d2 f7 f1 89 47 08 f3 c3 66 0f 1f 44 00 00 0f 1f 44 00 RSP: 0018:ffffb7e189347bf0 EFLAGS: 00010246 RAX: 00000000e1692410 RBX: ffffb7e189347d60 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffb7e189347c10 RBP: ffff99972a091c00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000100 R13: 0000000000010000 R14: 00007ffd66baf6d0 R15: 0000000000000000 FS: 00007f2054d11740(0000) GS:ffff99972fbc0000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f205481fd20 CR3: 00000004288a0001 CR4: 00000000001606a0 Call Trace: fb_set_var+0x257/0x390 ? lookup_fast+0xbb/0x2b0 ? fb_open+0xc0/0x140 ? chrdev_open+0xa6/0x1a0 do_fb_ioctl+0x445/0x5a0 do_vfs_ioctl+0x92/0x5f0 ? __alloc_fd+0x3d/0x160 ksys_ioctl+0x60/0x90 __x64_sys_ioctl+0x16/0x20 do_syscall_64+0x5b/0x190 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f20548258d7 Code: 44 00 00 48 8b 05 b9 15 2d 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 89 15 2d 00 f7 d8 64 89 01 48 It can be triggered easily with following test code: #include <linux/fb.h> #include <fcntl.h> #include <sys/ioctl.h> int main(void) { struct fb_var_screeninfo var = {.activate = 0x100, .pixclock = 60}; int fd = open("/dev/fb0", O_RDWR); if (fd < 0) return 1; if (ioctl(fd, FBIOPUT_VSCREENINFO, &var)) return 1; return 0; } Signed-off-by:Shile Zhang <shile.zhang@linux.alibaba.com> Cc: Fredrik Noring <noring@nocrew.org> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by:
Mukesh Ojha <mojha@codeaurora.org> Signed-off-by:
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Yifeng Li authored
Loongson MIPS netbooks use 1024x600 LCD panels, which is the original target platform of this driver, but nearly all old x86 laptops have 1024x768. Lighting 768 panels using 600's timings would partially garble the display. Since it's not possible to distinguish them reliably, we change the default to 768, but keep 600 as-is on MIPS. Further, earlier laptops, such as IBM Thinkpad 240X, has a 800x600 LCD panel, this driver would probably garbled those display. As we don't have one for testing, the original behavior of the driver is kept as-is, but the problem has been documented is the comments. Signed-off-by:
Sudip Mukherjee <sudipm.mukherjee@gmail.com> Cc: Teddy Wang <teddy.wang@siliconmotion.com> Cc: <stable@vger.kernel.org> # v4.4+ Signed-off-by:
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Yifeng Li authored
In order to support the 1024x600 panel on Yeeloong Loongson MIPS laptop, the original 1024x768-16 table was modified to 1024x600-16, without leaving the original. It causes problem on x86 laptop as the 1024x768-16 support was still claimed but not working. Fix it by introducing the 1024x768-16 mode. Signed-off-by:
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Yifeng Li authored
On a Thinkpad s30 (Pentium III / i440MX, Lynx3DM), blanking the display or starting the X server will crash and freeze the system, or garble the display. Experiments showed this problem can mostly be solved by adjusting the order of register writes. Also, sm712fb failed to consider the difference of clock frequency when unblanking the display, and programs the clock for SM712 to SM720. Fix them by adjusting the order of register writes, and adding an additional check for SM720 for programming the clock frequency. Signed-off-by:
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Yifeng Li authored
On a Thinkpad s30 (Pentium III / i440MX, Lynx3DM), running fbtest or X will crash the machine instantly, because the VRAM/framebuffer is not mapped correctly. On SM712, the framebuffer starts at the beginning of address space, but SM720's framebuffer starts at the 1 MiB offset from the beginning. However, sm712fb fails to take this into account, as a result, writing to the framebuffer will destroy all the registers and kill the system immediately. Another problem is the driver assumes 8 MiB of VRAM for SM720, but some SM720 system, such as this IBM Thinkpad, only has 4 MiB of VRAM. Fix this problem by removing the hardcoded VRAM size, adding a function to query the amount of VRAM from register MCR76 on SM720, and adding proper framebuffer offset. Please note that the memory map may have additional problems on Big-Endian system, which is not available for testing by myself. But I highly suspect that the original code is also broken on Big-Endian machines for SM720, so at least we are not making the problem worse. More, the driver also assumed SM710/SM712 has 4 MiB of VRAM, but it has a 2 MiB version as well, and used in earlier laptops, such as IBM Thinkpad 240X, the driver would probably crash on them. I've never seen one of those machines and cannot fix it, but I have documented these problems in the comments. Signed-off-by:
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Yifeng Li authored
When the machine is booted in VGA mode, loading sm712fb would cause a glitch of random pixels shown on the screen. To prevent it from happening, we first clear the entire framebuffer, and we also need to stop calling smtcfb_setmode() during initialization, the fbdev layer will call it for us later when it's ready. Signed-off-by:
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Yifeng Li authored
On a Thinkpad s30 (Pentium III / i440MX, Lynx3DM), the amount of Video RAM is not detected correctly by the xf86-video-siliconmotion driver. This is because sm712fb overwrites the GPR71 Scratch Pad Register, which is set by BIOS on x86 and used to indicate amount of VRAM. Other Scratch Pad Registers, including GPR70/74/75, don't have the same side-effect, but overwriting to them is still questionable, as they are not related to modesetting. Stop writing to SR70/71/74/75 (a.k.a GPR70/71/74/75). Signed-off-by:
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Yifeng Li authored
On a Thinkpad s30 (Pentium III / i440MX, Lynx3DM), rebooting with sm712fb framebuffer driver would cause the role of brightness up/down button to swap. Experiments showed the FPR30 register caused this behavior. Moreover, even if this register don't have side-effect on other systems, over- writing it is also highly questionable, since it was originally configurated by the motherboard manufacturer by hardwiring pull-down resistors to indicate the type of LCD panel. We should not mess with it. Stop writing to the SR30 (a.k.a FPR30) register. Signed-off-by:
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Yifeng Li authored
On a Thinkpad s30 (Pentium III / i440MX, Lynx3DM), rebooting with sm712fb framebuffer driver would cause a white screen of death on the next POST, presumably the proper timings for the LCD panel was not reprogrammed properly by the BIOS. Experiments showed a few CRTC Scratch Registers, including CRT3D, CRT3E and CRT3F may be used internally by BIOS as some flags. CRT3B is a hardware testing register, we shouldn't mess with it. CRT3C has blanking signal and line compare control, which is not needed for this driver. Stop writing to CR3B-CR3F (a.k.a CRT3B-CRT3F) registers. Even if these registers don't have side-effect on other systems, writing to them is also highly questionable. Signed-off-by:
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Kangjie Lu authored
In case ioremap fails, the fix releases resources and returns -ENOMEM to avoid NULL pointer dereferences. Signed-off-by:
Kangjie Lu <kjlu@umn.edu> Cc: Aditya Pakki <pakki001@umn.edu> Cc: Finn Thain <fthain@telegraphics.com.au> Cc: Rob Herring <robh@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> [b.zolnierkie: minor patch summary fixup] Signed-off-by:
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Kangjie Lu authored
When ioremap fails, hga_vram should not be dereferenced. The fix check the failure to avoid NULL pointer dereference. Signed-off-by:
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Gerd Hoffmann authored
Simply add all pci memory bars to struct apertures_struct in remove_conflicting_pci_framebuffers(), without depending on the res_id parameter. The plan is to drop the res_id parameter later on. For now keep the parameter, use it for sanity-checking and warn on inconsistencies. Signed-off-by:
Gerd Hoffmann <kraxel@redhat.com> Reviewed-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by:
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Enrico Weigelt, metux IT consult authored
Formatting of Kconfig files doesn't look so pretty, so let the Great White Handkerchief come around and clean it up. Signed-off-by:
Enrico Weigelt, metux IT consult <info@metux.net> [b.zolnierkie: add missing patch description] Signed-off-by:
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Aditya Pakki authored
Memory allocated, using kmalloc, for new_compat may fail. This patch checks for such an error and prevents potential NULL pointer dereference. Signed-off-by:
Aditya Pakki <pakki001@umn.edu> Cc: Kangjie Lu <kjlu@umn.edu> Signed-off-by:
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Gustavo A. R. Silva authored
In preparation to enabling -Wimplicit-fallthrough, mark switch cases where we are expecting to fall through. This patch fixes the following warning: drivers/video/fbdev/xen-fbfront.c: In function ‘xenfb_backend_changed’: drivers/video/fbdev/xen-fbfront.c:678:6: warning: this statement may fall through [-Wimplicit-fallthrough=] if (dev->state == XenbusStateClosed) ^ drivers/video/fbdev/xen-fbfront.c:681:2: note: here case XenbusStateClosing: ^~~~ Warning level 3 was used: -Wimplicit-fallthrough=3 Notice that, in this particular case, the code comment is modified in accordance with what GCC is expecting to find. This patch is part of the ongoing efforts to enable -Wimplicit-fallthrough. Signed-off-by:Gustavo A. R. Silva <gustavo@embeddedor.com> Cc: Kees Cook <keescook@chromium.org> Signed-off-by:
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Mikulas Patocka authored
Rendering calls may be done simultaneously from the workqueue, dlfb_ops_write, dlfb_ops_ioctl, dlfb_ops_set_par and dlfb_dpy_deferred_io. The code is robust enough so that it won't crash on concurrent rendering. However, concurrent rendering may cause display corruption if the same pixel is simultaneously being rendered. In order to avoid this corruption, this patch adds a mutex around the rendering calls. Signed-off-by:
Mikulas Patocka <mpatocka@redhat.com> Cc: Bernie Thompson <bernie@plugable.com> Cc: Ladislav Michl <ladis@linux-mips.org> Cc: <stable@vger.kernel.org> [b.zolnierkie: replace "dlfb:" with "uldfb:" in the patch summary] Signed-off-by:
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Mikulas Patocka authored
If a framebuffer device is used as a console, the rendering calls (copyarea, fillrect, imageblit) may be done with the console spinlock held. On udlfb, these function call dlfb_handle_damage that takes a blocking semaphore before acquiring an URB. In order to fix the bug, this patch changes the calls copyarea, fillrect and imageblit to offload USB work to a workqueue. A side effect of this patch is 3x improvement in console scrolling speed because the device doesn't have to be updated after each copyarea call. Signed-off-by:
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Mikulas Patocka authored
Remove the unused parameter "data" and unused variable "ret". Signed-off-by:
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Alexandre Belloni authored
Make the driver OF only as since AVR32 has been removed from the kernel, there are only OF enabled platform using it. Signed-off-by:
Alexandre Belloni <alexandre.belloni@bootlin.com> Acked-by:
Sam Ravnborg <sam@ravnborg.org> Signed-off-by:
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Julia Lawall authored
Add an of_node_put when a tested device node is not available. The semantic patch that fixes this problem is as follows (http://coccinelle.lip6.fr): // <smpl> @@ identifier f; local idexpression e; expression x; @@ e = f(...); ... when != of_node_put(e) when != x = e when != e = x when any if (<+...of_device_is_available(e)...+>) { ... when != of_node_put(e) ( return e; | + of_node_put(e); return ...; ) } // </smpl> Fixes: f76ee892 ("omapfb: copy omapdss & displays for omapfb") Signed-off-by:
Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by:
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Finn Thain authored
Don't skip the framebuffer CLUT pointer register initialization when the first dafb_setpalette() invocation has regno equal to zero. Suggested-by:
Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by:
Finn Thain <fthain@telegraphics.com.au> Signed-off-by:
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Finn Thain authored
The 'inverse' parameter has no effect otherwise. Remove set-but-unused variable. Signed-off-by:
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Geert Uytterhoeven authored
Now the driver has been converted to a platform driver, the legacy printk() calls without any log level can be replaced by proper dev_*() calls. Signed-off-by:
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Geert Uytterhoeven authored
On Falcon, Atari frame buffer initialization relies on preprogrammed register values. These register values are changed to blank the console. Hence when using kexec to boot into a new kernel while the console is blanked, the new kernel cannot determine the current video configuration, and the Atari frame buffer driver fails to initialize: atafb: phys_screen_base 6ce000 screen_len 4096 Fix this by doing a straight-forward conversion of the driver to a platform device driver, and adding a shutdown handler that unblanks the display. Signed-off-by: -
Geert Uytterhoeven authored
CONFIG_FB_ATARI is bool, hence the Atari frame buffer driver cannot be built as a module. In addition, the module support code refers to a function atafb_deinit(), which never existed. Replace module_init() by device_initcall(). Signed-off-by:
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Geert Uytterhoeven authored
Printing (hashed) virtual addresses is useless. Signed-off-by:
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Finn Thain authored
The value of info->var.bits_per_pixel get checked in macfb_setcolreg(). Remove additional checks as they are redundant. macfb_defined.activate gets initialized to FB_ACTIVATE_NOW by the struct initializer. Remove redundant assignments. macfb_defined.bits_per_pixel, .width and .height all get assigned unconditionally. Remove redundant initializers. Signed-off-by:
Stan Johnson <userm57@yahoo.com> Reviewed-by:
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Colin Ian King authored
The indentation in the if statement is not indented correctly, fix this with extra level of indentation. Signed-off-by:
Colin Ian King <colin.king@canonical.com> Cc: Antonino Daplas <adaplas@gmail.com> Signed-off-by:
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Colin Ian King authored
There are a couple of statements that are indented too deeply, fix this by removing tabs. Also add a space after a comma to clean up a cppcheck warning. Signed-off-by:
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Melchior Franz authored
The FB_PRE_INIT_FB option keeps the kernel from reinitializing the display and prevents flickering during the transition from a bootloader splash screen to the kernel logo screen. Make this option available for the mxsfb driver. Signed-off-by:
Melchior Franz <melchior.franz@ginzinger.com> Signed-off-by:
Martin Kepplinger <martin.kepplinger@ginzinger.com> Signed-off-by:
Manfred Schlaegl <manfred.schlaegl@ginzinger.com> Cc: Shawn Guo <shawnguo@kernel.org> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Pengutronix Kernel Team <kernel@pengutronix.de> Cc: Fabio Estevam <festevam@gmail.com> Signed-off-by:
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Bartlomiej Zolnierkiewicz authored
Merge tag 'v5.1-rc3' of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into fbdev-for-next Linux 5.1-rc3 Sync with upstream (which now contains fbdev-v5.1 changes) to prepare a base for fbdev-v5.2 changes.
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- 31 Mar, 2019 1 commit
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Linus Torvalds authored
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