linux/drivers/gpu/host1x, branch v4.1

gpu: host1x: Export host1x_syncpt_read()

2015-04-02T16:46:20Z

This function is used to read the current value of the syncpt and is useful in situations where drivers don't schedule work and wait for the syncpoint to increment. One particular use-case is using the syncpoint as a VBLANK counter. Signed-off-by: Thierry Reding

gpu: host1x: Provide a proper struct bus_type

2015-01-27T09:09:14Z

Previously the struct bus_type exported by the host1x infrastructure was only a very basic skeleton. Turn that implementation into a more full- fledged bus to support proper probe ordering and power management. Note that the bus infrastructure needs to be available before any of the drivers can be registered. This is automatically ensured if all drivers are built as loadable modules (via symbol dependencies). If all drivers are built-in there are no such guarantees and the link order determines the initcall ordering. Adjust drivers/gpu/Makefile to make sure that the host1x bus infrastructure is initialized prior to any of its users (only drm/tegra currently). v2: Fix building host1x and tegra-drm as modules Reported-by: Dave Airlie Reviewed-by: Sean Paul Reviewed-by: Mark Zhang Signed-off-by: Thierry Reding

gpu: host1x: Factor out __host1x_device_del()

2015-01-23T11:07:01Z

This function is needed in several places, so factor it out. Signed-off-by: Thierry Reding

gpu: host1x: Call host1x_device_add() under lock

2015-01-23T11:07:01Z

Instead of locking within host1x_device_add(), call it under the lock to make the locking more consistent. Signed-off-by: Thierry Reding

gpu: host1x: Call ->remove() only when a device is bound

2015-01-23T11:07:00Z

When a driver's ->probe() function fails, the host1x bus must not call its ->remove() function because the driver will already have cleaned up in the error handling path in ->probe(). Signed-off-by: Thierry Reding

gpu: host1x: mipi: Set MIPI_CAL_BIAS_PAD_CFG1 register

2014-11-13T15:11:57Z

During calibration, sets the "internal reference level for drive pull- down" to the value specified in the Tegra TRM. Signed-off-by: Sean Paul Signed-off-by: Thierry Reding

gpu: host1x: mipi: Calibrate clock lanes

2014-11-13T15:11:54Z

Include the clock lanes when calibrating the MIPI PHY on Tegra124 compatible devices. Signed-off-by: Sean Paul [treding@nvidia.com: bikeshedding] Signed-off-by: Thierry Reding

gpu: host1x: mipi: Preserve the contents of MIPI_CAL_CTRL

2014-11-13T15:11:51Z

By paving the CTRL reg value, the current code changes MIPI_CAL_PRESCALE ("Auto-cal calibration step prescale") from 1us to 0.1us (val=0). In the description for PHY's noise filter (MIPI_CAL_NOISE_FLT), the TRM states that if the value of the prescale is 0 (or 0.1us), the filter should be set between 2-5. However, the current code sets it to 0. For now, let's keep the prescale and filter values as-is, which is most likely the power-on-reset values of 0x2 and 0xa, respectively. Signed-off-by: Sean Paul Signed-off-by: Thierry Reding

gpu: host1x: mipi: Registers are 32 bits wide

2014-11-13T15:11:48Z

On 64-bit platforms an unsigned long would be 64 bit and cause unnecessary casting when being passed to writel() or returned from readl(). Make register values 32 bits wide to avoid that. Signed-off-by: Thierry Reding

gpu: host1x: Make gather offsets unsigned

2014-11-13T15:11:44Z

Use the u32 type for the offset in the host1x_job_gather structure for consistentcy with other structures. Negative offsets don't make sense in this context. Signed-off-by: Thierry Reding