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Subject: media: atomisp: add Microsoft Surface 3 ACPI vars Author: Tsuchiya Yuto <[email protected]> Date: Mon Oct 18 01:19:55 2021 +0900 Microsoft Surface 3 does not describe CsiPort/CsiLanes in DSDT [1] or EFI, or at least not desctibed in the forms the current atomisp driver expects. This results in the default values (port: 0 lanes: 1) to be used, which does not work. So, define them ourselves in the driver. The user-facing camera is AR0330 (2-lane) and the world-facing camera is OV8835 (4-lane). According to the portconfigs definition in atomisp_csi_lane_config() [atomisp_v4l2.c]: } portconfigs[] = { /* Tangier/Merrifield available lane configurations */ { 0x00, { 4, 1, 0 } }, /* 00000 */ { 0x01, { 3, 1, 0 } }, /* 00001 */ { 0x02, { 2, 1, 0 } }, /* 00010 */ { 0x03, { 1, 1, 0 } }, /* 00011 */ { 0x04, { 2, 1, 2 } }, /* 00100 */ { 0x08, { 3, 1, 1 } }, /* 01000 */ { 0x09, { 2, 1, 1 } }, /* 01001 */ { 0x0a, { 1, 1, 1 } }, /* 01010 */ /* Anniedale/Moorefield only configurations */ { 0x10, { 4, 2, 0 } }, /* 10000 */ { 0x11, { 3, 2, 0 } }, /* 10001 */ { 0x12, { 2, 2, 0 } }, /* 10010 */ { 0x13, { 1, 2, 0 } }, /* 10011 */ { 0x14, { 2, 2, 2 } }, /* 10100 */ { 0x18, { 3, 2, 1 } }, /* 11000 */ { 0x19, { 2, 2, 1 } }, /* 11001 */ { 0x1a, { 1, 2, 1 } }, /* 11010 */ }; 4-lane camera is always connected to the PRIMARY (port1) port [2]. In this case, 2-lane camera can be connected to the only SECONDARY (port0) port. So, add these data accordingly as the gmin_cfg_var ACPI variables for Surface 3. [1] https://github.com/linux-surface/acpidumps/blob/7da48a392b4085c2021952290def1fc28505a643/surface_3/dsdt.dsl#L5879-L6278 [2] Yes, the PRIMARY port is port1 according to atomisp_camera_port [atomisp.h]: enum atomisp_camera_port { ATOMISP_CAMERA_PORT_SECONDARY, ATOMISP_CAMERA_PORT_PRIMARY, ATOMISP_CAMERA_PORT_TERTIARY, ATOMISP_CAMERA_NR_PORTS }; Signed-off-by: Tsuchiya Yuto <[email protected]> Signed-off-by: Mauro Carvalho Chehab <[email protected]> .../staging/media/atomisp/pci/atomisp_gmin_platform.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) --- diff --git a/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c b/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c index d8c9e31314b2..948eb6f809f5 100644 --- a/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c +++ b/drivers/staging/media/atomisp/pci/atomisp_gmin_platform.c @@ -321,6 +321,18 @@ static struct gmin_cfg_var i8880_vars[] = { {}, }; +/* + * Surface 3 does not describe CsiPort/CsiLanes in both DSDT and EFI. + */ +static struct gmin_cfg_var surface3_vars[] = { + {"APTA0330:00_CsiPort", "0"}, + {"APTA0330:00_CsiLanes", "2"}, + + {"OVTI8835:00_CsiPort", "1"}, + {"OVTI8835:00_CsiLanes", "4"}, + {}, +}; + static const struct dmi_system_id gmin_vars[] = { { .ident = "BYT-T FFD8", @@ -358,6 +370,13 @@ static const struct dmi_system_id gmin_vars[] = { }, .driver_data = i8880_vars, }, + { + .ident = "Surface 3", + .matches = { + DMI_MATCH(DMI_BOARD_NAME, "Surface 3"), + }, + .driver_data = surface3_vars, + }, {} }; _______________________________________________ linuxtv-commits mailing list [email protected] https://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
