threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
40 lines
1.3 KiB
Plaintext
40 lines
1.3 KiB
Plaintext
[This file is cloned from VesaFB/matroxfb]
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What is sa1100fb?
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=================
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This is a driver for a graphic framebuffer for the SA-1100 LCD
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controller.
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Configuration
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==============
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For most common passive displays, giving the option
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video=sa1100fb:bpp:<value>,lccr0:<value>,lccr1:<value>,lccr2:<value>,lccr3:<value>
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on the kernel command line should be enough to configure the
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controller. The bits per pixel (bpp) value should be 4, 8, 12, or
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16. LCCR values are display-specific and should be computed as
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documented in the SA-1100 Developer's Manual, Section 11.7. Dual-panel
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displays are supported as long as the SDS bit is set in LCCR0; GPIO<9:2>
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are used for the lower panel.
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For active displays or displays requiring additional configuration
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(controlling backlights, powering on the LCD, etc.), the command line
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options may not be enough to configure the display. Adding sections to
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sa1100fb_init_fbinfo(), sa1100fb_activate_var(),
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sa1100fb_disable_lcd_controller(), and sa1100fb_enable_lcd_controller()
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will probably be necessary.
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Accepted options:
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bpp:<value> Configure for <value> bits per pixel
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lccr0:<value> Configure LCD control register 0 (11.7.3)
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lccr1:<value> Configure LCD control register 1 (11.7.4)
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lccr2:<value> Configure LCD control register 2 (11.7.5)
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lccr3:<value> Configure LCD control register 3 (11.7.6)
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--
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Mark Huang <mhuang@livetoy.com>
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