kernel/linux.git/drivers/gpu/drm/omapdrm, branch v4.16.11

BackMerge tag 'v4.15-rc8' into drm-next

2018-01-17T23:32:15+00:00

Linux 4.15-rc8 Daniel requested this for so the intel CI won't fall over on drm-next so often.

omapdrm/dss/hdmi4_cec: fix interrupt handling

2018-01-02T12:20:10+00:00

The omap4 CEC hardware cannot tell a Nack from a Low Drive from an Arbitration Lost error, so just report a Nack, which is almost certainly the reason for the error anyway. This also simplifies the implementation. The only three interrupts that need to be enabled are: Transmit Buffer Full/Empty Change event: triggered when the transmit finished successfully and cleared the buffer. Receiver FIFO Not Empty event: triggered when a message was received. Frame Retransmit Count Exceeded event: triggered when a transmit failed repeatedly, usually due to the message being Nacked. Other reasons are possible (Low Drive, Arbitration Lost) but there is no way to know. If this happens the TX buffer needs to be cleared manually. While testing various error conditions I noticed that the hardware can receive messages up to 18 bytes in total, which exceeds the legal maximum of 16. This could cause a buffer overflow, so we check for this and constrain the size to 16 bytes. The old incorrect interrupt handler could cause the CEC framework to enter into a bad state because it mis-detected the "Start Bit Irregularity event" as an ARB_LOST transmit error when it actually is a receive error which should be ignored. Signed-off-by: Hans Verkuil Reported-by: Henrik Austad Tested-by: Henrik Austad Tested-by: Hans Verkuil Signed-off-by: Tomi Valkeinen

drm: omapdrm: Simplify platform registration

2017-12-19T09:21:32+00:00

Currently, calls into each file are used to register the various platform drivers. Change this to a table of pointers to platform_driver structs to allow using platform_register_drivers. Signed-off-by: Andrew F. Davis

drm: omapdrm: Remove filename from header and fix copyright tag

2017-12-19T09:21:32+00:00

Having the filename in the header serves little purpose and is often wrong after renames as it is here in several places, just drop it from all omapdrm files. While we are here unify the copyright tags to the TI recommended style. Signed-off-by: Andrew F. Davis

drm/omap: DMM: Check for DMM readiness after successful transaction commit

2017-12-19T08:32:00+00:00

Check the status of the DMM engine after it is reported that the transaction was completed as in rare cases the engine might not reached a working state. The wait_status() will print information in case the DMM is not reached the expected state and the dmm_txn_commit() will return with an error code to make sure that we are not continuing with a broken setup. Signed-off-by: Peter Ujfalusi Signed-off-by: Tomi Valkeinen

drm/omap: DMM: Print information if we received an error interrupt

2017-12-19T08:32:00+00:00

To help diagnose DMM errors, print out information if any of the error bits are set in the interrupt status register. Signed-off-by: Peter Ujfalusi Signed-off-by: Tomi Valkeinen

drm/omap: DMM: In case of error/timeout in wait_status() print the reason

2017-12-19T08:32:00+00:00

If the wait_status() fails either because of an error reported in the STATUS register or because of a timeout waiting for the wait_mask, print information which might help diagnose the reason. Signed-off-by: Peter Ujfalusi Signed-off-by: Tomi Valkeinen

drm/omap: DMM: Fix DMM_IRQSTAT_ERR_MASK definition

2017-12-19T08:32:00+00:00

The error bit definitions are typoed in DMM_IRQSTAT_ERR_MASK which went unnoticed since the DMM_IRQSTAT_ERR_MASK was not used. Change the bit definitions to the correct ones. Signed-off-by: Peter Ujfalusi Signed-off-by: Tomi Valkeinen

drm: omapdrm: Deconstruct the omap_drv.h header.

2017-12-19T08:32:00+00:00

The number of function declarations in the omap_drv.h degrades readability. To fix it, create new header files for each part of the driver and move the related functions. Signed-off-by: Laurent Pinchart Reviewed-by: Sebastian Reichel Signed-off-by: Tomi Valkeinen

drm: omapdrm: venc: Return error code on OF parsing failure

2017-12-19T08:32:00+00:00

The venc_probe_of() function has an error cleanup path that returns success instead of an error code. Fix it. Signed-off-by: Laurent Pinchart Reviewed-by: Sebastian Reichel Signed-off-by: Tomi Valkeinen