Commit Graph

10 Commits

Author SHA1 Message Date
Laurent Pinchart 2427bb241b fbdev: sh_mobile_lcdc: Restart LCDC in runtime PM resume handler
Instead of restoring registers blindly, restart the LCDC by going
through the startup sequence when resuming from runtime PM suspend. All
registers are now correctly initialized in the right order.

As a side effect, this also gets rid fo a possible panning restore issue
caused by always saving the frame buffer base address registers from set
A instead of the currently active set.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2011-08-19 08:22:41 +02:00
Laurent Pinchart 9a217e3444 fbdev: sh_mobile_lcdc: Split LCDC start code from sh_mobile_lcdc_start
Splitting the LCDC start code from clock, MERAM and panel management
will make the code usable by runtime PM.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2011-08-19 08:22:40 +02:00
Damian 7caa4342ca sh_mobile_meram: MERAM framework for LCDC
Based on the patch by Takanari Hayama <taki@igel.co.jp>

Adds support framework necessary to use Media RAM (MERAM)
caching functionality with the LCDC.  The MERAM is accessed
through up to 4 Interconnect Buffers (ICBs).

ICB numbers and MERAM address ranges to use are specified in
by filling in the .meram_cfg member of the LCDC platform data

Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-05-23 16:06:24 +09:00
Paul Mundt 1fcf0069f4 Merge branch 'common/fbdev' of master.kernel.org:/pub/scm/linux/kernel/git/lethal/sh-2.6 2011-03-29 16:06:21 +09:00
Alexandre Courbot 8857b9aa7e fbdev: sh_mobile_lcdcfb: add blanking support
Add a blanking callback to the LCDC driver in order to support both
FBIOBLANK and TIOCLINUX blanking ioctls. LCDC clocks are also released
if the requested blanking level is superior to FB_BLANK_NORMAL, to allow
runtime PM to disable the clocks if possible.

Signed-off-by: Alexandre Courbot <gnurou@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-03-29 16:04:39 +09:00
Damian Hobson-Garcia 53b5031430 fbdev: sh_mobile_lcdc: Add YUV framebuffer support
Supports YCbCr420sp, YCbCr422sp, and YCbCr44sp, formats
(bpp = 12, 16, and 24) respectively.

When double-buffering both Y planes appear before the C planes (Y-Y-C-C),
as opposed to  Y-C-Y-C.

Set .nonstd in struct sh_mobile_lcdc_chan_cfg to enable YUV mode, and use
.bpp to distiguish between the 3 modes.
The value of .nonstd is copied to bits 16-31 of LDDFR in the LCDC and
should be set accordingly.
.nonstd must be set to 0 for RGB mode.

Due to the encoding of YUV data, the framebuffer will clear to green
instead of black.

In YUV 420 mode, panning is only possible in 2 line increments.
Additionally in YUV 420 mode the vertical resolution of the framebuffer
must be an even number.

Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-03-16 17:27:10 +09:00
Alexandre Courbot 3b0fd9d755 fbdev: sh_mobile_lcdcfb: add backlight support
Support for backlight devices controlled through board-specific
routines. Backlights can be defined per-channel and follow fbdev
directives to switch off as the LCD blanks or is turned on/off.

Signed-off-by: Alexandre Courbot <gnurou@gmail.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2011-03-10 20:20:57 +09:00
Guennadi Liakhovetski dd210503b7 fbdev: sh_mobile_lcdc: reconfigure the framebuffer, when free
Currently the sh_mobile_lcdc driver only reconfigures the hardware interface,
when a new monitor is plugged in. This patch adds support for dynamic
framebuffer reconfiguration, when no user is holding the framebuffer device
node open.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-09-16 16:36:17 +09:00
Guennadi Liakhovetski 1c120deb60 fbdev: sh_mobile_lcdcfb: separate display variable data from framebuffer data
This is a preparation for a patch, that shall allow displaying of a smaller
framebuffer on a bigger display and of a part of a bigger framebuffer on a
smaller display.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-09-14 17:23:26 +09:00
Guennadi Liakhovetski 6de9edd5bd fbdev: sh_mobile_hdmi: implement locking
The SH-Mobile HDMI driver runs in several contexts: ISR, delayed work-queue,
task context, when called from the sh_mobile_lcdc framebuffer driver. This
creates ample race possibilities. Even though most these races are purely
theoretical, it is better to close them. To trace fb_info validity we install a
notification callback in the HDMI driver, and the only way for it to get to
driver internal data is by using struct sh_mobile_lcdc_chan, therefore it had
to be extracted into a separate common header.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2010-09-14 17:23:21 +09:00