The VBT DSI MIPI sequences of the panel on the Microsoft Surface 3 contain a couple of I2c writes to what seems to be a non existing TI LP855x backlight controller, leading to the following errors:
i915 0000:00:02.0: [drm] mipi_exec_i2c bus 5 client-addr 0x2c reg 0x01 data 01 i2c_designware 808622C1:04: controller timed out i915 0000:00:02.0: [drm] *ERROR* Failed to xfer payload of size (1) to reg (1) i915 0000:00:02.0: [drm] mipi_exec_i2c bus 5 client-addr 0x2c reg 0x16 data 07 i2c_designware 808622C1:04: controller timed out i915 0000:00:02.0: [drm] *ERROR* Failed to xfer payload of size (1) to reg (22)
Besides these errors this also causes the screen turning on to be delayed by 2 seconds. At a DMI based quirk to ignore VBT DSI MIPI I2C writes on the Microsoft Surface 3.
Signed-off-by: Hans de Goede hdegoede@redhat.com --- drivers/gpu/drm/i915/display/vlv_dsi.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/vlv_dsi.c b/drivers/gpu/drm/i915/display/vlv_dsi.c index 0ddc0c8cd4f7..9ba45a928719 100644 --- a/drivers/gpu/drm/i915/display/vlv_dsi.c +++ b/drivers/gpu/drm/i915/display/vlv_dsi.c @@ -1873,6 +1873,16 @@ static void vlv_dsi_lenovo_yoga_tab2_size_fixup(struct intel_dsi *intel_dsi, } }
+/* + * The VBT DSI MIPI sequences on the MS Surface 3 contain I2C writes to + * a non existing TI LP855x backlight controller which time out. + */ +static void vlv_dsi_ms_surface3_disable_mipi_i2c(struct intel_dsi *intel_dsi, + struct drm_display_mode *fixed_mode) +{ + intel_dsi->i2c_bus_num = INTEL_DSI_I2C_BUS_INVALID; +} + static const struct dmi_system_id vlv_dsi_dmi_quirk_table[] = { { /* Asus Transformer Pad TF103C */ @@ -1896,6 +1906,14 @@ static const struct dmi_system_id vlv_dsi_dmi_quirk_table[] = { }, .driver_data = (void *)vlv_dsi_lenovo_yoga_tab2_size_fixup, }, + { + /* Microsoft Surface 3 */ + .matches = { + DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Microsoft Corporation"), + DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "Surface 3"), + }, + .driver_data = (void *)vlv_dsi_ms_surface3_disable_mipi_i2c, + }, { } };