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* mx3fb: fix NULL pointer dereference in screen blanking.Wolfram Stering2011-10-031-0/+13
| | | | | | | | | | | | | | When blanking an already blanked framebuffer, a kernel NULL pointer dereference occurred, because mx3fb driver handles all kinds of screen blanking (normal, vsync suspend, powerdown) in the same way. Certain programs (Xorg X11 server) first do a normal blank, followed by a powerdown blank, which triggered the bug. Add an additional safeguard and make sdc_disable_channel() safe against multiple calls independent of other logic. Signed-off-by: Michael Thalmeier <michael.thalmeier@hale.at> Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
* mx3fb: use display information in info not in var for panningLaurent Pinchart2011-08-191-3/+3
| | | | | | | | | We must not use any information in the passed var besides xoffset, yoffset and vmode as otherwise applications might abuse it. Also use the aligned fix.line_length and not the (possible) unaligned xres_virtual. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Tested-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
* console: rename acquire/release_console_sem() to console_lock/unlock()Torben Hohn2011-01-261-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | The -rt patches change the console_semaphore to console_mutex. As a result, a quite large chunk of the patches changes all acquire/release_console_sem() to acquire/release_console_mutex() This commit makes things use more neutral function names which dont make implications about the underlying lock. The only real change is the return value of console_trylock which is inverted from try_acquire_console_sem() This patch also paves the way to switching console_sem from a semaphore to a mutex. [akpm@linux-foundation.org: coding-style fixes] [akpm@linux-foundation.org: make console_trylock return 1 on success, per Geert] Signed-off-by: Torben Hohn <torbenh@gmx.de> Cc: Thomas Gleixner <tglx@tglx.de> Cc: Greg KH <gregkh@suse.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'master' of ↵Paul Mundt2010-12-221-0/+4
|\ | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
| * ARM mx3fb: check for DMA engine typeSascha Hauer2010-11-151-0/+4
| | | | | | | | | | | | | | | | | | | | We have two dma engines in MX3 systems: The IPU and the SDMA engine. We have to check if we got a channel from the correct engine before proceeding with a channel. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Reviewed-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
* | video: mx3fb: Use vsprintf extension %pR for struct resourceJoe Perches2010-12-141-2/+1
|/ | | | | Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* DMAENGINE: extend the control command to include an argLinus Walleij2010-05-181-1/+1
| | | | | | | | | | | This adds an argument to the DMAengine control function, so that we can later provide control commands that need some external data passed in through an argument akin to the ioctl() operation prototype. [dan.j.williams@intel.com: fix up some missed conversions] Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* DMAENGINE: generic slave control v2Linus Walleij2010-03-271-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | Convert the device_terminate_all() operation on the DMA engine to a generic device_control() operation which can now optionally support also pausing and resuming DMA on a certain channel. Implemented for the COH 901 318 DMAC as an example. [dan.j.williams@intel.com: update for timberdale] Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: Maciej Sosnowski <maciej.sosnowski@intel.com> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Li Yang <leoli@freescale.com> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Cc: Magnus Damm <damm@opensource.se> Cc: Liam Girdwood <lrg@slimlogic.co.uk> Cc: Joe Perches <joe@perches.com> Cc: Roland Dreier <rdreier@cisco.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* mx3fb: some debug and initialisation fixesAlberto Panizzo2010-02-031-4/+8
| | | | | | | | | | | | | | | | Fix the kernel oops when dev_dbg is called with mx3_fbi->txd == NULL Fix the late initialisation of mx3fb->backlight_level. If not, in the chain of function started by init_fb_chan(), in __blank() call sdc_set_brightness(mx3fb, mx3fb->backlight_level) that will shut down the CONTRAST PWM output. Signed-off-by: Alberto Panizzo <maramaopercheseimorto@gmail.com> Acked-by: Guennadi Liakhovetski <g.liakhovetski <at> gmx.de> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* i.MX31: fix framebuffer locking regressionsGuennadi Liakhovetski2009-08-071-30/+56
| | | | | | | | | | | | Recent framebuffer locking patches first made affected systems unbootable, then the dead-lock has been fixed but as of 2.6.31-rc4 the framebuffer on mx3 machines doesn't work. Fix this. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mx3fb: fix regression with uninitalized fb_info->mm_lock mutexKrzysztof Helt2009-07-101-5/+0
| | | | | | | | | | | | Remove call to the mx3fb_set_par() and the mx3fb_blank() before the register_framebuffer(). This fixes a problem with uninitialized the fb_info->mm_lock mutex introduced by the commit 537a1bf059f " fbdev: add mutex for fb_mmap locking" Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fbdev: add mutex for fb_mmap lockingKrzysztof Helt2009-07-011-6/+11
| | | | | | | | | | | | | | | | | | | | | Add a mutex to avoid a circular locking problem between the mm layer semaphore and fbdev ioctl mutex through the fb_mmap() call. Also, add mutex to all places where smem_start and smem_len fields change so the mutex inside the fb_mmap() is actually used. Changing of these fields before calling the framebuffer_register() are not mutexed. This is 2.6.31 material. It removes one lockdep (fb_mmap() and register_framebuffer()) but there is still another one (fb_release() and register_framebuffer()). It also cleans up handling of the smem_start and smem_len fields used by mutexed section of the fb_mmap(). Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mx3fb: Issue prettier log messageSascha Hauer2009-05-171-1/+1
| | | | | | | | Without this patch we end up with a log message like "mx3_sdc_fb mx3_sdc_fb: mx3fb: fb registered". That's two fb too much for my taste. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* FB: fix unsafe use of disable_irq() in mx3fb.cGuennadi Liakhovetski2009-05-131-1/+1
| | | | | | | | | mx3fb.c calls disable_irq() from a DMA callback, i.e., in an IRQ-handler context, which has always been unsafe, and became deadly after the merge of threaded interrupt handler support. Use disable_irq_nosync() instead. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* mx3fb: Fix compilation with CONFIG_PMSascha Hauer2009-05-051-7/+7
| | | | Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* fbdev: i.MX31: fix panning, error handling, clean upGuennadi Liakhovetski2009-04-071-25/+31
| | | | | | | | | | | | | | | 1. check for errors returned from clk_get() 2. fix "Unbalanced enable for IRQ 160" 3. fix transmit descriptor handling in panning 4. clean frame buffer on blank - useful for OLED displays 5. formatting clean up Signed-off-by: Guennadi Liakhovetski <lg@denx.de> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Krzysztof Helt <krzysztof.h1@poczta.fm> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'imx-fb-fix' of ↵Russell King2009-03-161-1150/+1150
|\ | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx into devel Conflicts: drivers/video/mx3fb.c
| * i.MX31: framebuffer driverGuennadi Liakhovetski2009-02-261-0/+1555
| | | | | | | | | | | | | | | | | | This is a framebuffer driver for i.MX31 SoCs. It only supports synchronous displays, vertical panning supported, no overlay support. Signed-off-by: Guennadi Liakhovetski <lg@denx.de> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
| * Revert "i.MX31: framebuffer driver"Dan Williams2009-02-261-1555/+0
| | | | | | | | | | | | | | | | | | This reverts commit 86528da229a448577a8401a17c295883640d336c. This version of the patch was tab-to-space corrupted before application. Signed-off-by: Dan Williams <dan.j.williams@intel.com>
* | MX31 clkdev supportSascha Hauer2009-03-131-1/+1
|/ | | | | | | This patch adds clkdev support for i.MX31. This is done in a similar way done previously for i.MX27 Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
* i.MX31: framebuffer driverGuennadi Liakhovetski2009-01-211-0/+1555
This is a framebuffer driver for i.MX31 SoCs. It only supports synchronous displays, vertical panning supported, no overlay support. Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Guennadi Liakhovetski <lg@denx.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
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