On Sun, 19 Jan 2020, Jani Nikula <jani.nikula@xxxxxxxxx> wrote:
> On Fri, 17 Jan 2020, Vivek Kasireddy <vivek.kasireddy@xxxxxxxxx> wrote:
>> Remove the i2c_bus_num >= 0 check from the adapter lookup function
>> as this would prevent ACPI bus number override. This check was mainly
>> there to return early if the bus number has already been found but we
>> anyway return in the next line if the slave address does not match.
>
> Hans, could I trouble you to check this on your collection of BYT DSI
> devices please?
I went ahead and pushed the patch. Thanks.
BR,
Jani.
>
> BR,
> Jani.
>
>
>>
>> Fixes: 8cbf89db2941 ("drm/i915/dsi: Parse the I2C element from the VBT MIPI sequence block (v3)")
>> Cc: Hans de Goede <hdegoede@xxxxxxxxxx>
>> Cc: Nabendu Maiti <nabendu.bikash.maiti@xxxxxxxxx>
>> Cc: Matt Roper <matthew.d.roper@xxxxxxxxx>
>> Cc: Bob Paauwe <bob.j.paauwe@xxxxxxxxx>
>> Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
>> Signed-off-by: Vivek Kasireddy <vivek.kasireddy@xxxxxxxxx>
>> ---
>> drivers/gpu/drm/i915/display/intel_dsi_vbt.c | 3 +--
>> 1 file changed, 1 insertion(+), 2 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
>> index 6ec35d975bd7..04f953ba8f00 100644
>> --- a/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
>> +++ b/drivers/gpu/drm/i915/display/intel_dsi_vbt.c
>> @@ -394,8 +394,7 @@ static int i2c_adapter_lookup(struct acpi_resource *ares, void *data)
>> acpi_handle adapter_handle;
>> acpi_status status;
>>
>> - if (intel_dsi->i2c_bus_num >= 0 ||
>> - !i2c_acpi_get_i2c_resource(ares, &sb))
>> + if (!i2c_acpi_get_i2c_resource(ares, &sb))
>> return 1;
>>
>> if (lookup->slave_addr != sb->slave_address)
--
Jani Nikula, Intel Open Source Graphics Center
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