mirror of https://gitee.com/openkylin/linux.git
2e7a66a8b5
The following happens when connection a DVI output driven from the SiI9022 using a DVI-to-VGA adapter plug: i2c i2c-0: sendbytes: NAK bailout. i2c i2c-0: sendbytes: NAK bailout. Then no picture. Apparently the I2C engine inside the SiI9022 is not smart enough to try to fall back to DDC I2C. Or the vendor have not integrated the electronics properly. I don't know which one it is. After this, the I2C bus seems stalled and the first attempt to read the status register fails, and the code returns with negative return value, and the display fails to initialized. Instead, retry status readout five times and continue even if this fails. Tested on the ARM Versatile Express with a DVI-to-VGA connector, it now gives picture. Introduce a helper struct device *dev variable to make the code more readable. Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Liviu Dudau <Liviu.Dudau@arm.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20180305101702.13441-1-linus.walleij@linaro.org |
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| .. | ||
| adv7511 | ||
| analogix | ||
| synopsys | ||
| Kconfig | ||
| Makefile | ||
| analogix-anx78xx.c | ||
| analogix-anx78xx.h | ||
| dumb-vga-dac.c | ||
| lvds-encoder.c | ||
| megachips-stdpxxxx-ge-b850v3-fw.c | ||
| nxp-ptn3460.c | ||
| panel.c | ||
| parade-ps8622.c | ||
| sii902x.c | ||
| sii9234.c | ||
| sil-sii8620.c | ||
| sil-sii8620.h | ||
| tc358767.c | ||
| ti-tfp410.c | ||