kernel/drivers/gpu/drm/i2c, branch linux-4.1.y

drm/bridge: adv7511: Re-write the i2c address before EDID probing

2017-10-04T01:36:47Z

[ Upstream commit 3587c856675c45809010c2cee5b21096f6e8e938 ] I've found that by just turning the chip on and off via the POWER_DOWN register, I end up getting i2c_transfer errors on HiKey. Investigating further, it turns out that some of the register state in hardware is getting lost, as the device registers are reset when the chip is powered down. Thus this patch simply re-writes the i2c address to the ADV7511_REG_EDID_I2C_ADDR register to ensure its properly set before we try to read the EDID data. Cc: David Airlie Cc: Archit Taneja Cc: Wolfram Sang Cc: Lars-Peter Clausen Cc: Laurent Pinchart Cc: dri-devel@lists.freedesktop.org Reviewed-by: Laurent Pinchart Tested-by: Laurent Pinchart Signed-off-by: John Stultz Signed-off-by: Archit Taneja Link: http://patchwork.freedesktop.org/patch/msgid/1484614372-15342-7-git-send-email-john.stultz@linaro.org Signed-off-by: Sasha Levin

drm: adv7511: really enable interrupts for EDID detection

2017-10-04T01:36:46Z

[ Upstream commit d0be8584b01160eb6f49e77f8e9c1da286bb4ffb ] The interrupts for EDID_READY or DDC_ERROR were never enabled in this driver, so reading EDID always timed out when chip was powered down and interrupts were used. Fix this and also remove clearing the interrupt flags, they are cleared in POWER_DOWN mode anyhow (unlike the interrupt enable flags) according to docs and my tests. Signed-off-by: Wolfram Sang Tested-by: Archit Taneja Signed-off-by: Sasha Levin

drm: adv7511: Refactor power management

2015-03-19T10:28:55Z

Remove the internal dependency on DPMS mode for power management by using a by a powered state boolean instead, and use the new power off handler at probe time. This ensure that the regmap cache is properly marked as dirty when the device is probed, and the registers properly synced during the first power up. As a side effect this removes the initialization of current_edid_segment at probe time, as the field will be initialized when the device is powered on, at the latest right before reading EDID data. Signed-off-by: Laurent Pinchart Tested-by: Christian Kohn Tested-by: Lars-Peter Clausen Acked-by: Lars-Peter Clausen

drm: adv7511: Fix nested sleep when reading EDID

2015-03-19T10:28:55Z

The EDID read code waits for the read completion interrupt to occur using wait_event_interruptible(). The condition passed to the macro reads I2C registers. This results in sleeping with the task state set to TASK_INTERRUPTIBLE, triggering a WARN_ON() introduced in commit 8eb23b9f35aae ("sched: Debug nested sleeps"). Fix this by reworking the EDID read code. Instead of checking whether the read is complete through I2C reads, handle the interrupt registers in the interrupt handler and update a new edid_read flag accordingly. As a side effect both the IRQ and polling code paths now process the interrupt sources through the same code path, simplifying the code. Cc: stable@vger.kernel.org Signed-off-by: Laurent Pinchart

drm: adv7511: Fix DDC error interrupt handling

2015-03-19T10:28:55Z

The DDC error interrupt bit is located in REG_INT1, not REG_INT0. Update both the interrupt wait code and the interrupt sources reset code accordingly. Cc: stable@vger.kernel.org Signed-off-by: Laurent Pinchart

drm: Fix trivial typos in comments

2015-03-10T08:59:34Z

Change 'pixes' to 'pixels' Change 'enabel' to 'enable' Change 'enabeling' to 'enabling' Signed-off-by: Yannick Guerrini Signed-off-by: Daniel Vetter

Merge branch 'drm-tda998x-devel' of git://ftp.arm.linux.org.uk/~rmk/linux-arm into drm-next

2015-03-04T23:37:19Z

A number of TDA998x updates for the next merge window. Patches included in this set are: * adding support for finding the attached CRTCs from DT * a fix function name mis-spelling in a dev_err() * simplify the EDID reading by using the drm_do_get_edid() function instead of coding this ourselves. * 'drm-tda998x-devel' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: drm/i2c: tda998x: use drm_do_get_edid() drm/i2c: tda998x: fix misspelling of current function in string drm/i2c: tda998x: add OF support for finding attached CRTCs

Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into drm-next

2015-01-29T01:45:31Z

This backmerges drm-fixes into drm-next mainly for the amdkfd stuff, I'm not 100% confident, but it builds and the amdkfd folks can fix anything up. Signed-off-by: Dave Airlie Conflicts: drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h

Merge branch 'drm-tda998x-fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm into drm-fixes

2015-01-26T23:12:53Z

3 fixes for the tda998x. * 'drm-tda998x-fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm: drm/i2c: tda998x: set the CEC I2C address based on the slave I2C address drm: tda998x: Fix EDID read timeout on HDMI connect drm: tda998x: Protect the page register

drm/i2c: tda998x: use drm_do_get_edid()

2015-01-21T14:21:47Z

Replace the internal EDID read implementation by a call to the new EDID read core function. Signed-off-by: Laurent Pinchart Reviewed-by: Rob Clark Tested-by: Jean-Francois Moine Signed-off-by: Russell King