kernel/drivers/gpu/ipu-v3/ipu-pre.c, branch linux-4.16.y

gpu: ipu-v3: pre: fix device node leak in ipu_pre_lookup_by_phandle

2018-02-19T14:12:59Z

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

gpu: ipu-v3: pre: add tiled prefetch support

2017-12-19T11:49:11Z

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 [p.zabel@pengutronix.de: rebased after ERR009624 workaround] Signed-off-by: Philipp Zabel

gpu: ipu-v3: pre: implement workaround for ERR009624

2017-10-11T10:04:24Z

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 [p.zabel@pengutronix.de: rebased before PRE tiled prefetch support] Signed-off-by: Philipp Zabel

gpu: ipu-v3: pre: only use internal clock gating

2017-06-06T08:21:10Z

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

gpu: ipu-v3: add driver for Prefetch Resolve Engine

2017-03-15T14:42:35Z

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