diff options
author | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-01-21 06:04:45 -0500 |
---|---|---|
committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2011-01-24 14:05:19 -0500 |
commit | 82e6923e1862428b755ec306b3dbccf926849314 (patch) | |
tree | e0be095c30c7cbfeff2a2096cf53e9c2f92fed13 /Documentation/arm/Sharp-LH/LCDPanels | |
parent | 1bae4ce27c9c90344f23c65ea6966c50ffeae2f5 (diff) |
ARM: lh7a40x: remove unmaintained platform support
lh7a40x has only been receiving updates for updates to generic code.
The last involvement from the maintainer according to the git logs was
in 2006. As such, it is a maintainence burden with no benefit.
This gets rid of two defconfigs.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'Documentation/arm/Sharp-LH/LCDPanels')
-rw-r--r-- | Documentation/arm/Sharp-LH/LCDPanels | 59 |
1 files changed, 0 insertions, 59 deletions
diff --git a/Documentation/arm/Sharp-LH/LCDPanels b/Documentation/arm/Sharp-LH/LCDPanels deleted file mode 100644 index fb1b21c2f2f4..000000000000 --- a/Documentation/arm/Sharp-LH/LCDPanels +++ /dev/null | |||
@@ -1,59 +0,0 @@ | |||
1 | README on the LCD Panels | ||
2 | ======================== | ||
3 | |||
4 | Configuration options for several LCD panels, available from Logic PD, | ||
5 | are included in the kernel source. This README will help you | ||
6 | understand the configuration data and give you some guidance for | ||
7 | adding support for other panels if you wish. | ||
8 | |||
9 | |||
10 | lcd-panels.h | ||
11 | ------------ | ||
12 | |||
13 | There is no way, at present, to detect which panel is attached to the | ||
14 | system at runtime. Thus the kernel configuration is static. The file | ||
15 | arch/arm/mach-ld7a40x/lcd-panels.h (or similar) defines all of the | ||
16 | panel specific parameters. | ||
17 | |||
18 | It should be possible for this data to be shared among several device | ||
19 | families. The current layout may be insufficiently general, but it is | ||
20 | amenable to improvement. | ||
21 | |||
22 | |||
23 | PIXEL_CLOCK | ||
24 | ----------- | ||
25 | |||
26 | The panel data sheets will give a range of acceptable pixel clocks. | ||
27 | The fundamental LCDCLK input frequency is divided down by a PCD | ||
28 | constant in field '.tim2'. It may happen that it is impossible to set | ||
29 | the pixel clock within this range. A clock which is too slow will | ||
30 | tend to flicker. For the highest quality image, set the clock as high | ||
31 | as possible. | ||
32 | |||
33 | |||
34 | MARGINS | ||
35 | ------- | ||
36 | |||
37 | These values may be difficult to glean from the panel data sheet. In | ||
38 | the case of the Sharp panels, the upper margin is explicitly called | ||
39 | out as a specific number of lines from the top of the frame. The | ||
40 | other values may not matter as much as the panels tend to | ||
41 | automatically center the image. | ||
42 | |||
43 | |||
44 | Sync Sense | ||
45 | ---------- | ||
46 | |||
47 | The sense of the hsync and vsync pulses may be called out in the data | ||
48 | sheet. On one panel, the sense of these pulses determine the height | ||
49 | of the visible region on the panel. Most of the Sharp panels use | ||
50 | negative sense sync pulses set by the TIM2_IHS and TIM2_IVS bits in | ||
51 | '.tim2'. | ||
52 | |||
53 | |||
54 | Pel Layout | ||
55 | ---------- | ||
56 | |||
57 | The Sharp color TFT panels are all configured for 16 bit direct color | ||
58 | modes. The amba-lcd driver sets the pel mode to 565 for 5 bits of | ||
59 | each red and blue and 6 bits of green. | ||