@@ -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,
+ },
{ }
};
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(+)