kernel.git/drivers/gpu/drm/tegra/dc.c, branch linux-3.14.y

drm/tegra: Obtain head number from DT

2014-01-23T14:51:32Z

The head number of a given display controller is fixed in hardware and required to program outputs appropriately. Relying on the driver probe order to determine this number will not work, since that could yield a situation where the second head was probed first and would be assigned head number 0 instead of 1. By explicitly specifying the head number in the device tree, it is no longer necessary to rely on these assumptions. As a fallback, if the property isn't available, derive the head number from the display controller node's position in the device tree. That's somewhat more reliable than the previous default but not a proper solution. Tested-by: Stephen Warren Signed-off-by: Thierry Reding

drm/tegra: Relocate some output-specific code

2013-12-20T14:56:07Z

Some of the code in the CRTC's mode setting code is specific to the RGB output or needs to be called slightly differently depending on the type of output. Push that code down into the output drivers. Signed-off-by: Thierry Reding

drm/tegra: Add Tegra124 DC support

2013-12-20T14:56:06Z

Tegra124 and later support interlacing, but the driver doesn't support it yet. Make sure interlacing stays disabled on hardware that supports it. Signed-off-by: Thierry Reding

drm/tegra: use reset framework

2013-12-11T23:43:04Z

Tegra's clock driver now provides an implementation of the common reset API (include/linux/reset.h). Use this instead of the old Tegra- specific API; that will soon be removed. Signed-off-by: Stephen Warren Acked-By: Terje Bergstrom

drm/tegra: Support bottom-up buffer objects

2013-10-31T08:55:46Z

The gr3d engine renders images bottom-up. Allow buffers that are used for 3D content to be marked as such and implement support in the display controller to present them properly. Signed-off-by: Thierry Reding Signed-off-by: Thierry Reding

drm/tegra: Add support for tiled buffer objects

2013-10-31T08:55:46Z

The gr2d and gr3d engines work more efficiently on buffers with a tiled memory layout. Allow created buffers to be marked as tiled so that the display controller can scan them out properly. Signed-off-by: Thierry Reding Signed-off-by: Thierry Reding

drm/tegra: Allocate resources at probe time

2013-10-31T08:55:41Z

Since the .init() and .exit() functions are executed whenever the DRM driver is loaded or unloaded, care must be taken not to use them for resource allocation. Otherwise deferred probing cannot be used, since the .init() and .exit() are not run at probe time. Similarly the code that frees resources must be run at .remove() time. If it is run from the .exit() function, it can release resources multiple times. To handle this more consistently, rename the tegra_output_parse_dt() function to tegra_output_probe() and introduce tegra_output_remove() which can be used to free output-related resources. Signed-off-by: Thierry Reding

drm/tegra: Properly cleanup and zero out resources

2013-10-31T08:55:40Z

When the DRM driver is unloaded, all the associated resources must be cleaned up and zeroed out. This is necessary because of the architecture of the Tegra DRM driver, where not all subdrivers are unloaded along with the DRM driver. Therefore device-managed managed won't be freed and memory cannot be assumed to have been cleared (because it hasn't been reallocated using kzalloc()) by the time the DRM driver is reloaded. It is therefore necessary to zero out the structures to prevent strange errors (such as slab corruptions) from occurring. Signed-off-by: Thierry Reding

drm/tegra: Move driver to DRM tree

2013-10-31T08:55:40Z

In order to make subsystem-wide changes easier, move the Tegra DRM driver back into the DRM tree. Signed-off-by: Thierry Reding

drm/tegra: Move drm to live under host1x

2013-04-22T10:39:11Z

Make drm part of host1x driver. Signed-off-by: Arto Merilainen Signed-off-by: Terje Bergstrom Reviewed-by: Thierry Reding Tested-by: Thierry Reding Tested-by: Erik Faye-Lund Signed-off-by: Thierry Reding