Hi Thomas,
I've tested this series on my Dell T310, and it works well, when I
plug/unplug the VGA screen, it's reflected in /sys/class/drm/.../status
I've also tested it remotely on a Dell R640, which doesn't have a VGA
monitor connected.
After the patch, on the iDrac console, I only get a green screen saying:
"Out of Range
Reason: Video Capture Failure
Detected Resolution: 0x768
Detected Color Depth-1bpp"
and the file:
/sys/class/drm/card0-VGA-1/modes
is empty
Before the patch, the driver reports VGA as connected, and modes
contains 1024x768 and others.
I think we may need to add a virtual connector for BMC, like I've done
for AST ?
So that when no VGA monitor is available, you can still choose an
appropriate resolution.
Best regards,
--
Jocelyn
On 03/04/2024 11:24, Thomas Zimmermann wrote:
Detect the connector status by polling the DDC. Update the status at
runtime. Clean up a the driver's DDC code in the process.
Patches 1 and 2 fix long-standing problems in the DDC code.
Patches 3 to 9 refactor the DDC code. The code then keeps its data
structures internal, acquires locks automatically and it much more
readable overall.
With patches 10 and 11, mgag200 makes use of existing helpers for
reading and probing the DDC. It then correctly updates the status
and EDID at runtime.
Tested on various Matrox hardware.
Thomas Zimmermann (11):
drm/mgag200: Set DDC timeout in milliseconds
drm/mgag200: Bind I2C lifetime to DRM device
drm/mgag200: Store pointer to struct mga_device in struct mga_i2c_chan
drm/mgag200: Allocate instance of struct mga_i2c_chan dynamically
drm/mgag200: Inline mgag200_i2c_init()
drm/mgag200: Replace struct mga_i2c_chan with struct mgag200_ddc
drm/mgag200: Rename mgag200_i2c.c to mgag200_ddc.c
drm/mgag200: Rename struct i2c_algo_bit_data callbacks
drm/mgag200: Acquire I/O-register lock in DDC code
drm/mgag200: Use drm_connector_helper_get_modes()
drm/mgag200: Set .detect_ctx() and enable connector polling
drivers/gpu/drm/mgag200/Makefile | 2 +-
drivers/gpu/drm/mgag200/mgag200_ddc.c | 179 ++++++++++++++++++++++
drivers/gpu/drm/mgag200/mgag200_ddc.h | 11 ++
drivers/gpu/drm/mgag200/mgag200_drv.h | 19 +--
drivers/gpu/drm/mgag200/mgag200_g200.c | 15 +-
drivers/gpu/drm/mgag200/mgag200_g200eh.c | 15 +-
drivers/gpu/drm/mgag200/mgag200_g200eh3.c | 15 +-
drivers/gpu/drm/mgag200/mgag200_g200er.c | 15 +-
drivers/gpu/drm/mgag200/mgag200_g200ev.c | 15 +-
drivers/gpu/drm/mgag200/mgag200_g200ew3.c | 15 +-
drivers/gpu/drm/mgag200/mgag200_g200se.c | 15 +-
drivers/gpu/drm/mgag200/mgag200_g200wb.c | 15 +-
drivers/gpu/drm/mgag200/mgag200_i2c.c | 129 ----------------
drivers/gpu/drm/mgag200/mgag200_mode.c | 27 +---
14 files changed, 274 insertions(+), 213 deletions(-)
create mode 100644 drivers/gpu/drm/mgag200/mgag200_ddc.c
create mode 100644 drivers/gpu/drm/mgag200/mgag200_ddc.h
delete mode 100644 drivers/gpu/drm/mgag200/mgag200_i2c.c
