From: Benson Leung <bleung@xxxxxxxxxxxx> Allow 400khz mode on port2, VGADDC address 0x67 for cyapa i2c touchpads. This will improve firmware update speed. BUG=chrome-os-partner:9798 TEST=time echo 1 > /sys/bus/i2c/devices/2-0067/update_fw Check that the update firmware succeeds, and the time taken was: real 0m13.823s user 0m0.000s sys 0m0.121s Change-Id: I38afaef60f1421003a1e54f4108f465ba4ce7899 Signed-off-by: Benson Leung <bleung@xxxxxxxxxxxx> Reviewed-on: https://gerrit.chromium.org/gerrit/22990 Reviewed-by: Yufeng Shen <miletus@xxxxxxxxxxxx> --- drivers/gpu/drm/i915/intel_i2c.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_i2c.c b/drivers/gpu/drm/i915/intel_i2c.c index 364204f..6d9364c 100644 --- a/drivers/gpu/drm/i915/intel_i2c.c +++ b/drivers/gpu/drm/i915/intel_i2c.c @@ -343,10 +343,10 @@ gmbus_xfer(struct i2c_adapter *adapter, reg_offset = dev_priv->gpio_mmio_base; - /* Hack to use 400kHz only for atmel_mxt i2c devices on ddc ports */ + /* 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 == 0x4b || msgs[0].addr == 0x67)) || ((gmbus0 & GMBUS_PORT_MASK) == GMBUS_PORT_PANEL && (msgs[0].addr == 0x4a || msgs[0].addr == 0x26))) gmbus0 = (gmbus0 & ~GMBUS_RATE_MASK) | GMBUS_RATE_400KHZ; -- 1.8.3.2 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
