Dispc driver presumes that the callers handle locking for all normal
functions. However, omapdrm doesn't handle this, and presumes that all
overlay manager registers are private to that overlay manager, and thus
presumes that configurations for overlay managers can be written via
different threads freely.
For many registers the above is true. The exceptions are DISPC_CONTROL
and DISPC_CONFIG registers, which contain bits for both LCD and TV
overlay managers.
Fixing this properly in omapdrm means a big omapdrm rewrite. So, for
now, add locking to dispc for the problematic registers.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reported-by: Somnath Mukherjee <somnath@ti.com>
omapdrm doesn't always configure the overlays correctly, causing the
overlay setup functions to be called with zero timings. This leads to
division by zero error.
This happens, for example, when a HDMI cable is not connected, but a
user tries to setup a plane with scaling.
Fixing omapdrm is a big job, so for now let's check for the bad timings
in DISPC and return an error.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
The common 'struct videomode' does not have a flag to select when the
sync signals should be driven.
The default behavior of DISPC HW is to drive the sync signal on the
opposite pixel clock edge from data signal, which is also what the
videomode_to_omap_video_timings() uses.
However, it looks like what panels usually expect is that the data and
sync signals are driven on the same edge, so let's change
videomode_to_omap_video_timings() to set the sync_pclk_edge accordingly.
Note that this only affect panels drivers that use
videomode_to_omap_video_timings(), probably when getting the video
timings directly from DT data. The drivers can still configure the
sync_pclk_edge independently if they so wish.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
When configuring the lcd timings, instead of writing enum values
directly to the HW, use switch-case to get the value to be programmed.
This is safer and also allows us to change the enum values.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
DISPC can drive data lines either on rising or falling pixel clock edge,
which can be configured by the user.
Sync lines can also be driven on rising or falling pixel clock edge, but
additionally the HW can be configured to drive the sync lines on
opposite clock edge from the data lines.
This opposite edge setting does not make any sense, as the same effect
can be achieved by just setting the sync lines to be driven on the other
edge compared to the data lines. It feels like some kind of backward
compatibility option, even if all DSS versions seem to have the same
implementation.
To simplify the code and configuration of the signals, and to make the
dispc timings more compatible with what is used on other platforms,
let's just remove the whole opposite-edge support.
The drivers that used OMAPDSS_DRIVE_SIG_OPPOSITE_EDGES setting are
changed so that they use the opposite setting from the data edge.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
TFP410 requires that DE is active high and the data and syncs are driven
on rising pixel clock edge. However, at the moment the driver doesn't
request such syncs, and the end result is that the sync settings depend
on default values, which are not right in all cases.
Set the sync values explicitly.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
The DISPC driver checks that the buffer address is not 0. However, when
using TILER, the address space is TILER specific and 0 is a valid
address.
Fix the check to allow address of 0 for TILER.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reported-by: srinivas pulukuru <srinivas.pulukuru@ti.com>
It has been observed that the current SDA-HOLD time is too short for
some board/cable/monitor combinations. Increase the SDA-HOLD time to
1000ns.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
AM43xx supports pixel clock divider of 1, just like all OMAP3+ SoCs. Fix
the minimum divider value.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This allows those get_user_pages calls to pass FAULT_FLAG_ALLOW_RETRY to
the page fault in order to release the mmap_sem during the I/O.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andres Lagar-Cavilla <andreslc@google.com>
Cc: Peter Feiner <pfeiner@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
the check of the return code is missing, user space does not get notified
about the error condition:
omapdss OVERLAY error: overlay 2 horizontally not inside the display area (403 + 800 >= 800)
omapdss APPLY error: failed to apply settings: illegal configuration.
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Add support for DRA7xx DPI output.
DRA7xx has three DPI outputs, each of which gets its input from a DISPC
channel. However, DRA72x has only one video PLL, and DRA74x has two
video PLLs. In both cases the video PLLs need to be shared between
multiple outputs. The driver doesn't handle this at the moment.
Also, DRA7xx requires configuring CONTROL module bits to route the clock
from the PLL to the used DISPC channel.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Add support for DRA7xx to the HDMI driver.
The HDMI block on DRA7xx is the same as on OMAP5, except we need to
enable and disable the HDMI PLL via the CONTROL module.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
On DRA7xx, DISPC needs to write output signal polarities not only to a
DISPC register, like for all earlier DSS versions, but to control
module's CTRL_CORE_SMA_SW_1 register.
This patch adds support to write the polarities to control module.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Add DRA7xx support to DISPC driver. The DISPC block is the same as on
OMAP5, except the PLL's used for clocking are "videoX", not "dsiX".
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
DRA7xx SoCs have one (DRA72x) or two (DRA74x) video PLLs. They are
basically the same as DSI PLLs on OMAPs, but without the rest of the DSI
hardware. The video PLLs also require some configuration via the CONTROL
module.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Add functions which configure the control module register
CTRL_CORE_DSS_PLL_CONTROL found in DRA7xx SoCs. This register configures
whether the PLL registers are accessed internally by DSS, or externally
using OCP2SCP interface. They also configure muxes which route the PLL
output to a particular LCD overlay manager within DSS.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
A race issue has been observed with the encoder-tpd12s015 driver, which
leads to errors when trying to read EDID. This has only now been
observed, as OMAP4 and OMAP5 boards used SoC's GPIOs for LS_OE GPIO. On
dra7-evm boards, the LS_OE is behind a i2c controlled GPIO expander,
which increases the time to set the LS_OE.
This patch simplifies the handling of the LS_OE gpio in the driver by
removing the interrupt handling totally. The only time we actually need
to enable LS_OE is when we are reading the EDID, and thus we can just
set and clear the LS_OE gpio inside the read_edid() function.
This also has the additional benefit of very slightly decreasing the
power consumption.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
The OMAP5 HW supports directing DIGIT channel to DPI output, but the
driver doesn't support that. However, we have marked that configuration
as possible in the dss features, so in certain cases the driver tries to
use that configuration, leading to broken display.
Fix the problem by allowing DIGIT channel to go only to HDMI output.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
In some cases we need global identifiers for the DSS PLLs, for example
when configuring clock muxing on DRA7. For this purpose let's add a
'enum dss_pll_id'.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
The sys_copyarea() function performs the same operation as
cfb_copyarea() but using normal memory access instead of I/O
accessors. Since the introduction of sys_copyarea(), there
have been two fixes to cfb_copyarea():
- 00a9d699 ("framebuffer: fix cfb_copyarea")
- 5b789da8 ("framebuffer: fix screen corruption when copying")
This patch incorporates the fixes into sys_copyarea() as well.
Signed-off-by: Mans Rullgard <mans@mansr.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
The frame buffer core can be a module, which means any fb drivers
should be able to build as modules too. This turns mmpfb into
a tristate option to allow that and fix a possible randconfig
build error.
drivers/built-in.o: In function `modes_setup':
:(.text+0x11b34): undefined reference to `fb_videomode_to_modelist'
:(.text+0x11b5c): undefined reference to `fb_videomode_to_var'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Device driver should not directly select subsystems. In this case
we get build warnings like
warning: (ARCH_REQUIRE_GPIOLIB && PINCTRL_AT91 && PINCTRL_NOMADIK && MFD_TC6393XB && FB_VIA) selects GPIOLIB which has unmet direct dependencies (ARCH_WANT_OPTIONAL_GPIOLIB || ARCH_REQUIRE_GPIOLIB)
which we can avoid using the normal 'depends on' statement.
Also, this patch makes it possible for DRM drivers to have a dependency
on GPIOLIB without getting circular Kconfig dependencies.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
this patch fixes ssd1307fb_ssd1306_init() function to return
proper error codes in case of failures.
Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
CVT v1.1 spec says: "the vertical front porch shall in all cases be
fixed to 3 lines". The code in fbcvt.c instead sets the _back_ porch to
3 (plus margin).
After swapping cvt.v_front_porch and cvt.v_back_porch the resulting
timings were in line with CVT timings in VESA DMT spec.
The bug seems to be more than 9 years old, but I presume it has not been
noticed as usually the video timings come from the EDID or from the
timing tables in fbdev, and probably swapped values for vfp and vbp work
fine for most of the displays.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: David Ung <davidu@nvidia.com>
Cc: Antonino A. Daplas <adaplas@gmail.com>
var->yoffset is of the type __u32, hence the comparison will always
be false.
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Use NULL instead of 0 for the last entry of dmt_modes struct.
Supresses "sparse: Using plain integer as NULL pointer" warning.
Signed-off-by: David Ung <davidu@nvidia.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
IRQ_TYPE_PRIO is no longer used by the Atari platform interrupt code
since commit 734085651c ("[PATCH] m68k: convert atari irq code")
in v2.6.18-rc1, so drop it.
Note that its value has been reused for a different purpose
(IRQ_TYPE_EDGE_FALLING) since commit 6a6de9ef58 ("[PATCH] genirq:
core") in v2.6.18-rc1.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
fbmon may generate mode timings that are out of spec of the monitor.
eg DELL U2410 has a max clock 170mhz but advertises a resolutions of
1920x1200@60 in its Standard Timings using 2byte code of D1 00.
When this is looked up in the DMT table it gives it a 193mhz clock.
Although the DELL monitor supports 1920x1200@60, it can only run with
reduced timings at 154mhz or DMT id 0x44 which has no STD 2byte code.
This patch checks to see if the mode can be supported by the monitor
by comparing against monspecs.dclkmax.
Signed-off-by: David Ung <davidu@nvidia.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Add the VESA Display Monitor Timing (DMT) table.
During parsing of Standard Timings, it compare the 2 byte STD code
with DMT to see what the VESA mode should be. If there is no entry
in the vesa_modes table or no match found, it fallsback to the
GTF timings.
Signed-off-by: David Ung <davidu@nvidia.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
this patch sets the default height if its not found in DT.
Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
this patch drops the unused function ssd1307fb_write_data().
Signed-off-by: Lad, Prabhakar <prabhakar.csengg@gmail.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
commit 765d5b9c2b ("fbdev: fbcon: select
VT_HW_CONSOLE_BINDING") made FRAMEBUFFER_CONSOLE always select
VT_HW_CONSOLE_BINDING, but forgot to remove
select VT_HW_CONSOLE_BINDING if FRAMEBUFFER_CONSOLE
from the individual drivers' sections that already did this before.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
static code analysis from cppcheck reports:
[drivers/video/fbdev/broadsheetfb.c:673]:
(error) Memory leak: sector_buffer
sector_buffer is not being kfree'd on each call to
broadsheet_spiflash_rewrite_sector(), so free it.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
continue is not needed at the end of a for loop, also removed the
braces which were no longer required.
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
vga_in8() was storing the return value in tmp, but that return value
was never used again. so it should be safe to remove those variables.
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
the check for info is not required as we are checking it immediately
after gxfb_init_fbinfo() and lxfb_init_fbinfo() and returnig -ENOMEM
if it is NULL.
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Assigning ddata->invert_polarity to itself is not very useful; the
context suggests that the right-hand side should have been
pdata->invert_polarity.
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
of_platform_device_create is only defined when CONFIG_OF_ADDRESS is set,
which is normally always the case when CONFIG_OF is defined, except on Sparc,
so explicitly check for CONFIG_OF_ADDRESS rather then for CONFIG_OF.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
When allocate framebuffer memory using dma_alloc_coherent(),
we'd better use dma_addr_t instead of phys_addr_t. Because the
address we got in fact is DMA or bus address for the platform.
This patch also fixes below build warning:
drivers/video/fbdev/ocfb.c:335:2:
warning: passing argument 3 of ‘dma_alloc_attrs’
from incompatible pointer type [enabled by default]
Signed-off-by: Qiang Chen <qiang2.chen@sonymobile.com>
Acked-by: Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
opa362 is amplifier for video and can be connected to the tvout pads
of the OMAP3. It has one gpio control for enable/disable of the output
(high impedance).
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Signed-off-by: Marek Belisko <marek@goldelico.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
the check for info is not required as we are checking it immediately
after gx1fb_init_fbinfo() and returnig -ENOMEM if it is NULL.
Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
We can mark the DMI system id table as __initconst by using a helper
variable that'll tell us if we need to unregister the reboot notifier in
atyfb_exit() instead of matching the DMI system id again.
This frees up ~680 bytes of runtime memory, the DMI table occupies.
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
