path: root/drivers/gpu/ipu-v3/ipu-pre.c
AgeCommit message (Collapse)AuthorFilesLines
2019-06-05treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288Thomas Gleixner1-9/+1
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms and conditions of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 263 file(s). Signed-off-by: Thomas Gleixner <> Reviewed-by: Allison Randal <> Reviewed-by: Alexios Zavras <> Cc: Link: Signed-off-by: Greg Kroah-Hartman <>
2019-02-22gpu: ipu-v3: pre: add double buffer status readbackLucas Stach1-0/+6
This allows the upper layers to check if a double buffer update has been applied by the PRE or is still pending. Signed-off-by: Lucas Stach <> [ inverted logic: done -> pending] Signed-off-by: Philipp Zabel <>
2019-01-23gpu: ipu-v3: pre: don't trigger update if buffer address doesn't changeLucas Stach1-0/+6
On a NOP double buffer update where current buffer address is the same as the next buffer address, the SDW_UPDATE bit clears too late. As we are now using this bit to determine when it is safe to signal flip completion to userspace this will delay completion of atomic commits where one plane doesn't change the buffer by a whole frame period. Fix this by remembering the last buffer address and just skip the double buffer update if it would not change the buffer address. Signed-off-by: Lucas Stach <> [ initialize last_bufaddr in ipu_pre_configure] Signed-off-by: Philipp Zabel <>
2018-07-09driver core: Rename flag AUTOREMOVE to AUTOREMOVE_CONSUMERVivek Gautam1-1/+2
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 <>
2018-02-19gpu: ipu-v3: pre: fix device node leak in ipu_pre_lookup_by_phandleTobias Jordan1-0/+3
Before returning, call of_node_put() for the device node returned by of_parse_phandle(). Fixes: d2a34232580a ("gpu: ipu-v3: add driver for Prefetch Resolve Engine") Signed-off-by: Tobias Jordan <> Signed-off-by: Philipp Zabel <>
2017-12-19gpu: ipu-v3: pre: add tiled prefetch supportLucas Stach1-3/+26
This configures the TPR unit, using the DRM format modifier. For now only the single buffer modifiers are supported, as split buffer needs more configuration for the required cropping. Signed-off-by: Lucas Stach <> [ rebased after ERR009624 workaround] Signed-off-by: Philipp Zabel <>
2017-10-11gpu: ipu-v3: pre: implement workaround for ERR009624Lucas Stach1-0/+29
The PRE has a bug where a software write to the CTRL register can block the setting of the ENABLE bit by the hardware in auto repeat mode. When this happens the PRE will fail to handle new jobs. To work around this software must not write to CTRL register when the PRE store engine is inside the unsafe window, where a hardware update to the ENABLE bit may happen. Signed-off-by: Lucas Stach <> [ rebased before PRE tiled prefetch support] Signed-off-by: Philipp Zabel <>
2017-06-06gpu: ipu-v3: pre: only use internal clock gatingLucas Stach1-8/+5
By setting the SFTRST bit, the PRE will be held in the lowest power state with clocks to the internal blocks gated. When external clock gating is used (from the external clock controller, or by setting the CLKGATE bit) the PRE will sporadically fail to start. Signed-off-by: Lucas Stach <> Fixes: d2a34232580a ("gpu: ipu-v3: add driver for Prefetch Resolve Engine") Signed-off-by: Philipp Zabel <>
2017-03-15gpu: ipu-v3: add driver for Prefetch Resolve EngineLucas Stach1-0/+289
This adds support for the i.MX6 QuadPlus PRE units. Currently only linear prefetch into SRAM is supported, other modes of operation like the tiled-to-linear conversion will be added later. Signed-off-by: Lucas Stach <> Signed-off-by: Philipp Zabel <>