From: Lima Project Developers dri-devel@lists.freedesktop.org
Signed-off-by: Qiang Yu yuq825@gmail.com Signed-off-by: Heiko Stuebner heiko@sntech.de --- drivers/gpu/drm/lima/lima_pmu.c | 85 +++++++++++++++++++++++++++++++++ drivers/gpu/drm/lima/lima_pmu.h | 30 ++++++++++++ 2 files changed, 115 insertions(+) create mode 100644 drivers/gpu/drm/lima/lima_pmu.c create mode 100644 drivers/gpu/drm/lima/lima_pmu.h
diff --git a/drivers/gpu/drm/lima/lima_pmu.c b/drivers/gpu/drm/lima/lima_pmu.c new file mode 100644 index 000000000000..255a64e9f265 --- /dev/null +++ b/drivers/gpu/drm/lima/lima_pmu.c @@ -0,0 +1,85 @@ +/* + * Copyright (C) 2017-2018 Lima Project + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ + +#include <linux/of.h> +#include <linux/io.h> +#include <linux/device.h> + +#include "lima_device.h" +#include "lima_pmu.h" +#include "lima_regs.h" + +#define pmu_write(reg, data) writel(data, ip->iomem + LIMA_PMU_##reg) +#define pmu_read(reg) readl(ip->iomem + LIMA_PMU_##reg) + +static int lima_pmu_wait_cmd(struct lima_ip *ip) +{ + struct lima_device *dev = ip->dev; + u32 stat, timeout; + + for (timeout = 1000000; timeout > 0; timeout--) { + stat = pmu_read(INT_RAWSTAT); + if (stat & LIMA_PMU_INT_CMD_MASK) + break; + } + + if (!timeout) { + dev_err(dev->dev, "timeout wait pmd cmd\n"); + return -ETIMEDOUT; + } + + pmu_write(INT_CLEAR, LIMA_PMU_INT_CMD_MASK); + return 0; +} + +int lima_pmu_init(struct lima_ip *ip) +{ + int err; + u32 stat; + struct lima_device *dev = ip->dev; + struct device_node *np = dev->dev->of_node; + + /* If this value is too low, when in high GPU clk freq, + * GPU will be in unstable state. */ + if (of_property_read_u32(np, "switch-delay", &ip->data.switch_delay)) + ip->data.switch_delay = 0xff; + + pmu_write(INT_MASK, 0); + pmu_write(SW_DELAY, ip->data.switch_delay); + + /* status reg 1=off 0=on */ + stat = pmu_read(STATUS); + + /* power up all ip */ + if (stat) { + pmu_write(POWER_UP, stat); + err = lima_pmu_wait_cmd(ip); + if (err) + return err; + } + return 0; +} + +void lima_pmu_fini(struct lima_ip *ip) +{ + +} diff --git a/drivers/gpu/drm/lima/lima_pmu.h b/drivers/gpu/drm/lima/lima_pmu.h new file mode 100644 index 000000000000..fb68a7059a37 --- /dev/null +++ b/drivers/gpu/drm/lima/lima_pmu.h @@ -0,0 +1,30 @@ +/* + * Copyright (C) 2017-2018 Lima Project + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ +#ifndef __LIMA_PMU_H__ +#define __LIMA_PMU_H__ + +struct lima_ip; + +int lima_pmu_init(struct lima_ip *ip); +void lima_pmu_fini(struct lima_ip *ip); + +#endif