From: Benson Leung <bleung@xxxxxxxxxxxx> The atmel_mxt_ts bootloader mode can support 400khz operation successfully. Enable it for bootloader at address 0x25 on the VGADDC adapter. BUG=chrome-os-partner:9994 TEST=place valid atmel mxt firmware at /lib/firmware/maxtouch.fw time echo 1 > update_fw Check that firmware update succeeds, and that the time is less than 9s. time echo 1 > update_fw real 0m8.450s user 0m0.001s sys 0m0.100s Change-Id: I52373189e051c265ce32a99cee8b139f51721b28 Signed-off-by: Benson Leung <bleung@xxxxxxxxxxxx> Reviewed-on: https://gerrit.chromium.org/gerrit/23760 Reviewed-by: Daniel Kurtz <djkurtz@xxxxxxxxxxxx> --- drivers/gpu/drm/i915/intel_i2c.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c index 6d9364c..a18837f 100644 --- a/drivers/gpu/drm/i915/intel_i2c.c +++ b/drivers/gpu/drm/i915/intel_i2c.c @@ -346,10 +346,12 @@ gmbus_xfer(struct i2c_adapter *adapter, /* Hack to use 400kHz only for touch i2c devices on ddc ports */ gmbus0 = bus->reg0; if (((gmbus0 & GMBUS_PORT_MASK) == GMBUS_PORT_VGADDC && - (msgs[0].addr == 0x4b || msgs[0].addr == 0x67)) || + (msgs[0].addr == 0x4b || msgs[0].addr == 0x67 || + msgs[0].addr == 0x25)) || ((gmbus0 & GMBUS_PORT_MASK) == GMBUS_PORT_PANEL && - (msgs[0].addr == 0x4a || msgs[0].addr == 0x26))) + (msgs[0].addr == 0x4a || msgs[0].addr == 0x26))) { gmbus0 = (gmbus0 & ~GMBUS_RATE_MASK) | GMBUS_RATE_400KHZ; + } I915_WRITE(GMBUS0 + reg_offset, gmbus0); for (i = 0; i < num; i++) { -- 1.8.3.2 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
