Fix the incorrect indentation in functions fb_try_mode() and fb_find_mode().
Signed-off-by: Timur Tabi <timur@freescale.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
The array size of fifo_size array in the global dispc struct is currently
hardcoded to 3. Replace this with the MAX_DSS_OVERLAYS macro in dss_features.h,
use dss_features function to get the number of overlays instead of the
ARRAY_SIZE macro in dispc_read_plane_fifo_sizes().
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Iterate over overlay id's to shorten _dispc_set_color_conv_coef()
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Iterate over manager and overlay id's to shorten dispc_save_context() and
dispc_restore_context().
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Iterate over manager and overlay id's to shorten dispc_dump_regs().
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Prepare dispc_dump_regs() to iterate over manager and overlay id's. Doing this
requires modifications of the macro "DUMPREG" which currently needs us to specify
the manager/overlay name to get the correct result. For example, in order to
print the register DISPC_TIMING_H(OMAP_DSS_CHANNEL_LCD), we can't iterate over
a varaible i and get the desired result through DUMPREG(DISPC_TIMING_H(i)).
Split the registers into 3 sections, the first with no arguments(common
registers), the second with one argument(manager/overlay id), and the third with
two arguments(overlay id and coefficient index), redefine DUMPREG macros for
each of these.
Signed-off-by: Archit Taneja <archit@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Make the debug message useful by printing the name of the device
that no associated driver could be found for.
Signed-off-by: Andy Doan <andy.doan@linaro.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
There's no guarantee that the error handler worker thread
will run while the dispc clocks are on. Explicitly enable/disable
them.
Signed-off-by: Dima Zavin <dima@android.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
If a manager is moved while attached to an enabled display, the DSS
system will be left in an inconsistent state. This will eventually cause
a kernel oops when the enabled display is disabled.
Fix this by not allowing the user to move a manager away from an enabled
display.
Signed-off-by: Daniel Morsing <daniel.morsing@gmail.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
None of the DSS interface drivers check if an overlay manager is
connected to the display when the display is being enabled. This leads
to null pointer crash if the display has no manager.
This patch checks for the manager and returns an error if it is null.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Fix two problems in PicoDLP driver's error handling on
picodlp_panel_power_on:
- If omapdss_dpi_display_enable() failed, the its error value was not
returned
- If picodlp_i2c_init() failed, dssdev->state was erroneously set to
OMAP_DSS_DISPLAY_ACTIVE
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
PicoDLP is a micro projector from TI.
DLP used in OMAP4 is dpp2600 (DLP Pico Projector) The DLP requires
commands to be sent over i2c for configurations. To know more about
dpp2600 commands please visit:
https://focus.ti.com/myti/docs/extranet.tsp?sectionId=403
The picodlp module consists of a dss driver and an i2c_client.
To know more please visit:
http://www.omappedia.org/wiki/PicoDLP_projector_guide
Based on original design from Mythri P K <mythripk@ti.com>
Signed-off-by: Mayuresh Janorkar <mayur@ti.com>
Signed-off-by: Mythri P K <mythripk@ti.com>
[tomi.valkeinen@ti.com: squashed commits]
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
The vga_lock lock can be taken in atomic context and therefore
cannot be preempted on -rt - annotate it.
In mainline this change documents the low level nature of
the lock - otherwise there's no functional difference. Lockdep
and Sparse checking will work as usual.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Since backlight_types[] isn't modified, let's declare it const. That
was probably the intention of the author of commit bb7ca747f8
("backlight: add backlight type"), via which the "const char const *"
construct was introduced. The duplicate const was detected by sparse.
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
The function duplicates code found in sh_mobile_check_var(). Remove
sh_mobile_lcdc_set_bpp() and call sh_mobile_check_var() instead.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Move channel initialization to sh_mobile_lcdc_channel_init() and call
the function from sh_mobile_lcdc_probe(). This makes the code more
readable and prepares it for fix/var initialization rework.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Instead of updating the fixed screen information line length manually
after calling fb_set_var() in sh_mobile_fb_reconfig(), update the field
in the .fb_set_par() operation handler.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
We must not use any information in the passed var besides xoffset,
yoffset and vmode as otherwise applications might abuse it.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Instead of failing when the requested fb_var_screeninfo parameters are
not supported, adjust the parameters according to the hardware
capabilities.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
When ICBs are unregistered and later reused they need to be reset to
avoid data corruption. Set the WBF, WF and RF bits to make sure ICBs get
reset properly.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Following on Herton's patch "fb: avoid possible deadlock caused by
fb_set_suspend" which moves lock_fb_info() out of fb_set_suspend()
to its callers, correct sh-mobile's locking around call to
fb_set_suspend() and the same sort of deaklocks with console_lock()
due to order of taking the lock.
console_lock() must be taken while fb_info is already locked and fb_info
must be locked while calling fb_set_suspend().
Signed-off-by: Bruno Prémont <bonbons@linux-vserver.org>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: stable@kernel.org
A lock ordering issue can cause deadlocks: in framebuffer/console code,
all needed struct fb_info locks are taken before acquire_console_sem(),
in places which need to take console semaphore.
But fb_set_suspend is always called with console semaphore held, and
inside it we call lock_fb_info which gets the fb_info lock, inverse
locking order of what the rest of the code does. This causes a real
deadlock issue, when we write to state fb sysfs attribute (which calls
fb_set_suspend) while a framebuffer is being unregistered by
remove_conflicting_framebuffers, as can be shown by following show
blocked state trace on a test program which loads i915 and runs another
forked processes writing to state attribute:
Test process with semaphore held and trying to get fb_info lock:
..
fb-test2 D 0000000000000000 0 237 228 0x00000000
ffff8800774f3d68 0000000000000082 00000000000135c0 00000000000135c0
ffff880000000000 ffff8800774f3fd8 ffff8800774f3fd8 ffff880076ee4530
00000000000135c0 ffff8800774f3fd8 ffff8800774f2000 00000000000135c0
Call Trace:
[<ffffffff8141287a>] __mutex_lock_slowpath+0x11a/0x1e0
[<ffffffff814142f2>] ? _raw_spin_lock_irq+0x22/0x40
[<ffffffff814123d3>] mutex_lock+0x23/0x50
[<ffffffff8125dfc5>] lock_fb_info+0x25/0x60
[<ffffffff8125e3f0>] fb_set_suspend+0x20/0x80
[<ffffffff81263e2f>] store_fbstate+0x4f/0x70
[<ffffffff812e7f70>] dev_attr_store+0x20/0x30
[<ffffffff811c46b4>] sysfs_write_file+0xd4/0x160
[<ffffffff81155a26>] vfs_write+0xc6/0x190
[<ffffffff81155d51>] sys_write+0x51/0x90
[<ffffffff8100c012>] system_call_fastpath+0x16/0x1b
..
modprobe process stalled because has the fb_info lock (got inside
unregister_framebuffer) but waiting for the semaphore held by the
test process which is waiting to get the fb_info lock:
..
modprobe D 0000000000000000 0 230 218 0x00000000
ffff880077a4d618 0000000000000082 0000000000000001 0000000000000001
ffff880000000000 ffff880077a4dfd8 ffff880077a4dfd8 ffff8800775a2e20
00000000000135c0 ffff880077a4dfd8 ffff880077a4c000 00000000000135c0
Call Trace:
[<ffffffff81411fe5>] schedule_timeout+0x215/0x310
[<ffffffff81058051>] ? get_parent_ip+0x11/0x50
[<ffffffff814130dd>] __down+0x6d/0xb0
[<ffffffff81089f71>] down+0x41/0x50
[<ffffffff810629ac>] acquire_console_sem+0x2c/0x50
[<ffffffff812ca53d>] unbind_con_driver+0xad/0x2d0
[<ffffffff8126f5f7>] fbcon_event_notify+0x457/0x890
[<ffffffff814144ff>] ? _raw_spin_unlock_irqrestore+0x1f/0x50
[<ffffffff81058051>] ? get_parent_ip+0x11/0x50
[<ffffffff8141836d>] notifier_call_chain+0x4d/0x70
[<ffffffff8108a3b8>] __blocking_notifier_call_chain+0x58/0x80
[<ffffffff8108a3f6>] blocking_notifier_call_chain+0x16/0x20
[<ffffffff8125dabb>] fb_notifier_call_chain+0x1b/0x20
[<ffffffff8125e6ac>] unregister_framebuffer+0x7c/0x130
[<ffffffff8125e8b3>] remove_conflicting_framebuffers+0x153/0x180
[<ffffffff8125eef3>] register_framebuffer+0x93/0x2c0
[<ffffffffa0331112>] drm_fb_helper_single_fb_probe+0x252/0x2f0 [drm_kms_helper]
[<ffffffffa03314a3>] drm_fb_helper_initial_config+0x2f3/0x6d0 [drm_kms_helper]
[<ffffffffa03318dd>] ? drm_fb_helper_single_add_all_connectors+0x5d/0x1c0 [drm_kms_helper]
[<ffffffffa037b588>] intel_fbdev_init+0xa8/0x160 [i915]
[<ffffffffa0343d74>] i915_driver_load+0x854/0x12b0 [i915]
[<ffffffffa02f0e7e>] drm_get_pci_dev+0x19e/0x360 [drm]
[<ffffffff8141821d>] ? sub_preempt_count+0x9d/0xd0
[<ffffffffa0386f91>] i915_pci_probe+0x15/0x17 [i915]
[<ffffffff8124481f>] local_pci_probe+0x5f/0xd0
[<ffffffff81244f89>] pci_device_probe+0x119/0x120
[<ffffffff812eccaa>] ? driver_sysfs_add+0x7a/0xb0
[<ffffffff812ed003>] driver_probe_device+0xa3/0x290
[<ffffffff812ed1f0>] ? __driver_attach+0x0/0xb0
[<ffffffff812ed29b>] __driver_attach+0xab/0xb0
[<ffffffff812ed1f0>] ? __driver_attach+0x0/0xb0
[<ffffffff812ebd3e>] bus_for_each_dev+0x5e/0x90
[<ffffffff812ecc2e>] driver_attach+0x1e/0x20
[<ffffffff812ec6f2>] bus_add_driver+0xe2/0x320
[<ffffffffa03aa000>] ? i915_init+0x0/0x96 [i915]
[<ffffffff812ed536>] driver_register+0x76/0x140
[<ffffffffa03aa000>] ? i915_init+0x0/0x96 [i915]
[<ffffffff81245216>] __pci_register_driver+0x56/0xd0
[<ffffffffa02f1264>] drm_pci_init+0xe4/0xf0 [drm]
[<ffffffffa03aa000>] ? i915_init+0x0/0x96 [i915]
[<ffffffffa02e84a8>] drm_init+0x58/0x70 [drm]
[<ffffffffa03aa094>] i915_init+0x94/0x96 [i915]
[<ffffffff81002194>] do_one_initcall+0x44/0x190
[<ffffffff810a066b>] sys_init_module+0xcb/0x210
[<ffffffff8100c012>] system_call_fastpath+0x16/0x1b
..
fb-test2 which reproduces above is available on kernel.org bug #26232.
To solve this issue, avoid calling lock_fb_info inside fb_set_suspend,
and move it out to where needed (callers of fb_set_suspend must call
lock_fb_info before if needed). So far, the only place which needs to
call lock_fb_info is store_fbstate, all other places which calls
fb_set_suspend are suspend/resume hooks that should not need the lock as
they should be run only when processes are already frozen in
suspend/resume.
References: https://bugzilla.kernel.org/show_bug.cgi?id=26232
Signed-off-by: Herton Ronaldo Krzesinski <herton@mandriva.com.br>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: stable@kernel.org
Increase delay when polling for tx status. This fixes
the unreliable video decoder i2c register access.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
The standard timings parses uses 1:1 dimensions when the ratio in the
EDID data is 0. However, for EDID 1.3 and later the dimensions are 16:10
when the ratio is 0.
Pass the version and revision numbers to get_std_timing() which can then
make the right decision about dimensions.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Include linux/module.h to fix below build error:
from drivers/video/mxsfb.c:42:
arch/arm/mach-mxs/include/mach/memory.h:22:1: warning: this is the location of the previous definition
drivers/video/mxsfb.c:574: error: 'THIS_MODULE' undeclared here (not in a function)
drivers/video/mxsfb.c:893: warning: data definition has no type or storage class
drivers/video/mxsfb.c:893: warning: type defaults to 'int' in declaration of 'MODULE_DEVICE_TABLE'
drivers/video/mxsfb.c:893: warning: parameter names (without types) in function declaration
drivers/video/mxsfb.c:917: error: expected declaration specifiers or '...' before string constant
drivers/video/mxsfb.c:917: warning: data definition has no type or storage class
drivers/video/mxsfb.c:917: warning: type defaults to 'int' in declaration of 'MODULE_DESCRIPTION'
drivers/video/mxsfb.c:917: warning: function declaration isn't a prototype
drivers/video/mxsfb.c:918: error: expected declaration specifiers or '...' before string constant
drivers/video/mxsfb.c:918: warning: data definition has no type or storage class
drivers/video/mxsfb.c:918: warning: type defaults to 'int' in declaration of 'MODULE_AUTHOR'
drivers/video/mxsfb.c:918: warning: function declaration isn't a prototype
drivers/video/mxsfb.c:919: error: expected declaration specifiers or '...' before string constant
drivers/video/mxsfb.c:919: warning: data definition has no type or storage class
drivers/video/mxsfb.c:919: warning: type defaults to 'int' in declaration of 'MODULE_LICENSE'
drivers/video/mxsfb.c:919: warning: function declaration isn't a prototype
make[2]: *** [drivers/video/mxsfb.o] Error 1
make[1]: *** [drivers/video] Error 2
make: *** [drivers] Error 2
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
ep93xx_bl.c uses interfaces from linux/module.h, so it should include
that file. This patch fixes build errors:
CC [M] drivers/video/backlight/ep93xx_bl.o
drivers/video/backlight/ep93xx_bl.c:138: error: 'THIS_MODULE' undeclared here (not in a function)
drivers/video/backlight/ep93xx_bl.c:158: error: expected declaration specifiers or '...' before string constant
drivers/video/backlight/ep93xx_bl.c:158: warning: data definition has no type or storage class
...
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Ryan Mallon <rmallon@gmail.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This patch adds struct s3c_fb_driverdata s3c_fb_data_exynos4 for EXYNOS4
and adds lcd clock gating support.
FIMD driver needs two clocks for FIMD IP and LCD pixel clock. Previously,
both clocks are provided by using bus clock such as HCLK. However, EXYNOS4
can not select HCLK for LCD pixel clock because the EXYNOS4 FIMD IP does not
have the CLKSEL bit of VIDCON0. So, FIMD driver should provide the lcd clock
using SCLK_FIMD as LCD pixel clock for EXYNOS4.
The driver selects enabling lcd clock according to has_clksel which means
the CLKSEL bit of VIDCON0. If there is has_clksel, the driver will not
enable the lcd clock using SCLK_FIMD because bus clock using HCLK is used
a LCD pixel clock.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Enables page fault based detection of mmap writes to the framebuffer,
which allows standard fbdev apps (like the generic fbdev xorg driver)
to work on DisplayLink devices.
Not all bugs are shaken out of the fb_defio path of udlfb, but it's
tantalizingly close, so this seems a good time to enable by default.
Alternatively, option can be disabled when running with an xorg driver
that can more directly communicate damaged regions of the framebuffer
via IOCTL. This is a simpler, higher perf option, when available.
Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
By default, udlfb allocates a 2nd buffer to shadow what's across
the bus on the USB device. It can operate without this shadow,
but then it cannot tell which pixels have changed, and must send all.
Saves host memory, but worsens the USB 2.0 bus bottleneck.
This option allows users in very low memory situations (e.g.
bifferboard) to optionally turn off this shadow framebuffer.
Signed-off-by: Stuart Hopkins <stuart@linux-depot.com>
Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Add __user casting, a missing copy_from_user, and proper boolean
Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
For at least one DisplayLink device, the vendor-specific information can
be found in the config descriptor instead of as a separate, device-level
descriptor. This patch searches the current interface (of the current
config descriptor) for the DL vendor-specific descriptor.
Signed-off-by: Andrew Kephart <akephart@akephart.org>
Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Fixes earlier problems where monitor would not return from blank
Test with any DisplayLink-based USB 2.0 graphics adapter
sudo nano /sys/class/graphics/fb?/blank
and write out single digit FB_BLANK_* code from include/linux/fb.h
Supports on (0), blank (1), suspend (2,3), powerdown (4)
Signed-off-by: Bernie Thompson <bernie@plugable.com>
Signed-off-by: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
We must not use any information in the passed var besides xoffset,
yoffset and vmode as otherwise applications might abuse it.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
We must not use any information in the passed var besides xoffset,
yoffset and vmode as otherwise applications might abuse it.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
We must not use any information in the passed var besides xoffset,
yoffset and vmode as otherwise applications might abuse it.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
We must not use any information in the passed var besides xoffset,
yoffset and vmode as otherwise applications might abuse it.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
We must not use any information in the passed var besides xoffset,
yoffset and vmode as otherwise applications might abuse it.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
We must not use any information in the passed var besides xoffset,
yoffset and vmode as otherwise applications might abuse it.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
