kernel.git/drivers/gpu/drm/tegra/dc.c, branch linux-4.19.y

drm/tegra: Add missing clk_disable_unprepare() in tegra_dc_probe()

2023-01-18T10:30:13Z

[ Upstream commit 7ad4384d53c67672a8720cdc2ef638d7d1710ab8 ] Add the missing clk_disable_unprepare() before return from tegra_dc_probe() in the error handling path. Fixes: f68ba6912bd2 ("drm/tegra: dc: Link DC1 to DC0 on Tegra20") Signed-off-by: Zhang Zekun Signed-off-by: Thierry Reding Signed-off-by: Sasha Levin

drm/tegra: dc: Don't set PLL clock to 0Hz

2021-04-16T09:49:30Z

[ Upstream commit f8fb97c915954fc6de6513cdf277103b5c6df7b3 ] RGB output doesn't allow to change parent clock rate of the display and PCLK rate is set to 0Hz in this case. The tegra_dc_commit_state() shall not set the display clock to 0Hz since this change propagates to the parent clock. The DISP clock is defined as a NODIV clock by the tegra-clk driver and all NODIV clocks use the CLK_SET_RATE_PARENT flag. This bug stayed unnoticed because by default PLLP is used as the parent clock for the display controller and PLLP silently skips the erroneous 0Hz rate changes because it always has active child clocks that don't permit rate changes. The PLLP isn't acceptable for some devices that we want to upstream (like Samsung Galaxy Tab and ASUS TF700T) due to a display panel clock rate requirements that can't be fulfilled by using PLLP and then the bug pops up in this case since parent clock is set to 0Hz, killing the display output. Don't touch DC clock if pclk=0 in order to fix the problem. Signed-off-by: Dmitry Osipenko Signed-off-by: Thierry Reding Signed-off-by: Sasha Levin

driver core: Rename flag AUTOREMOVE to AUTOREMOVE_CONSUMER

2018-07-09T10:14:31Z

Now that we want to add another flag to autoremove the device link on supplier unbind, it's fair to rename the existing flag from DL_FLAG_AUTOREMOVE to DL_FLAG_AUTOREMOVE_CONSUMER so that we can add similar flag for supplier later. And, while we are touching device.h, fix a doc build warning. Signed-off-by: Vivek Gautam Reviewed-by: Ulf Hansson Signed-off-by: Rafael J. Wysocki

drm/tegra: dc: Support rotation property

2018-05-18T19:56:21Z

Currently only the DRM_MODE_REFLECT_Y rotation is supported. The driver already supports reflection on the Y axis via a custom flag which is not very useful because it requires custom userspace. Add the standard rotation property that supports 0 degree rotation and Y axis reflection for primary and overlay planes to provide a better interface than the custom flag. v2: keep custom flag for ABI compatibility (Dmitry) Reviewed-by: Dmitry Osipenko Tested-by: Dmitry Osipenko Signed-off-by: Thierry Reding

drm/tegra: dc: Rename supports_blending to has_legacy_blending

2018-05-17T12:08:44Z

Older Tegra chips do support blending as well. Rename the SoC info entry .supports_blending to .has_legacy_blending to eliminate the confusion. Signed-off-by: Dmitry Osipenko Signed-off-by: Thierry Reding

drm/tegra: plane: Implement zpos plane property for older Tegras

2018-05-17T12:08:44Z

Older Tegra's do not support plane's Z position handling in hardware, but the hardware provides knobs to implement it in software. Signed-off-by: Dmitry Osipenko Signed-off-by: Thierry Reding

drm/tegra: dc: Enable plane scaling filters

2018-05-17T12:08:44Z

Currently resized plane produces a "pixelated" image which doesn't look nice, especially in a case of a video overlay. Enable scaling filters that significantly improve image quality of a scaled overlay. Signed-off-by: Dmitry Osipenko Signed-off-by: Thierry Reding

drm/tegra: Refactor IOMMU attach/detach

2018-05-17T12:08:40Z

Attaching to and detaching from an IOMMU uses the same code sequence in every driver, so factor it out into separate helpers. Reviewed-by: Dmitry Osipenko Signed-off-by: Thierry Reding

drm/tegra: dc: Free syncpoint on errors

2018-05-04T15:07:06Z

If an error happens during display controller initialization, the host1x syncpoint previously requested would be leaked. Properly clean up the syncpoint along with the other resources. Reviewed-by: Dmitry Osipenko Signed-off-by: Thierry Reding

drm/tegra: dc: Balance IOMMU group refcounting

2018-05-04T12:19:14Z

Remove unneeded iommu_group_get() and add missing iommu_group_put(), correcting IOMMU group refcount. This is a minor correction / cleanup that doesn't really fix anything because Tegra's IOMMU driver are built-in and hence groups refcounting can't hold IOMMU driver from unloading. Signed-off-by: Dmitry Osipenko Signed-off-by: Thierry Reding