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8253aa4700
We need at least 3 clocks in order to power up and access DSP core registers found on i.MX8QM, i.MX8QXP and i.MX8MP platforms. Add code to request these clocks and enable them at probe. Next patches will add PM support which will only activate clocks when DSP is used. DSP clocks are already documented in Documentation/devicetree/bindings/dsp/fsl,dsp.yaml We choose to add: * imx8_parse_clocks * imx8_enable_clocks * imx8_disable_clocks wrappers because in the future DSP will need to take care about the clocks of other related Audio IPs (e.g SAI, ESAI). Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com> Reviewed-by: Paul Olaru <paul.olaru@oss.nxp.com> Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Link: https://lore.kernel.org/r/20211119094319.81674-2-daniel.baluta@oss.nxp.com Signed-off-by: Mark Brown <broonie@kernel.org>
102 lines
2.8 KiB
C
102 lines
2.8 KiB
C
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
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//
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// Copyright 2020 NXP
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//
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// Common helpers for the audio DSP on i.MX8
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#include <linux/module.h>
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#include <sound/sof/xtensa.h>
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#include "../ops.h"
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#include "imx-common.h"
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/**
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* imx8_get_registers() - This function is called in case of DSP oops
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* in order to gather information about the registers, filename and
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* linenumber and stack.
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* @sdev: SOF device
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* @xoops: Stores information about registers.
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* @panic_info: Stores information about filename and line number.
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* @stack: Stores the stack dump.
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* @stack_words: Size of the stack dump.
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*/
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void imx8_get_registers(struct snd_sof_dev *sdev,
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struct sof_ipc_dsp_oops_xtensa *xoops,
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struct sof_ipc_panic_info *panic_info,
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u32 *stack, size_t stack_words)
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{
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u32 offset = sdev->dsp_oops_offset;
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/* first read registers */
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sof_mailbox_read(sdev, offset, xoops, sizeof(*xoops));
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/* then get panic info */
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if (xoops->arch_hdr.totalsize > EXCEPT_MAX_HDR_SIZE) {
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dev_err(sdev->dev, "invalid header size 0x%x. FW oops is bogus\n",
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xoops->arch_hdr.totalsize);
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return;
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}
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offset += xoops->arch_hdr.totalsize;
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sof_mailbox_read(sdev, offset, panic_info, sizeof(*panic_info));
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/* then get the stack */
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offset += sizeof(*panic_info);
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sof_mailbox_read(sdev, offset, stack, stack_words * sizeof(u32));
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}
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/**
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* imx8_dump() - This function is called when a panic message is
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* received from the firmware.
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* @sdev: SOF device
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* @flags: parameter not used but required by ops prototype
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*/
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void imx8_dump(struct snd_sof_dev *sdev, u32 flags)
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{
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struct sof_ipc_dsp_oops_xtensa xoops;
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struct sof_ipc_panic_info panic_info;
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u32 stack[IMX8_STACK_DUMP_SIZE];
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u32 status;
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/* Get information about the panic status from the debug box area.
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* Compute the trace point based on the status.
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*/
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sof_mailbox_read(sdev, sdev->debug_box.offset + 0x4, &status, 4);
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/* Get information about the registers, the filename and line
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* number and the stack.
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*/
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imx8_get_registers(sdev, &xoops, &panic_info, stack,
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IMX8_STACK_DUMP_SIZE);
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/* Print the information to the console */
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snd_sof_get_status(sdev, status, status, &xoops, &panic_info, stack,
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IMX8_STACK_DUMP_SIZE);
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}
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EXPORT_SYMBOL(imx8_dump);
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int imx8_parse_clocks(struct snd_sof_dev *sdev, struct imx_clocks *clks)
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{
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int ret;
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ret = devm_clk_bulk_get(sdev->dev, clks->num_dsp_clks, clks->dsp_clks);
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if (ret)
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dev_err(sdev->dev, "Failed to request DSP clocks\n");
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return ret;
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}
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EXPORT_SYMBOL(imx8_parse_clocks);
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int imx8_enable_clocks(struct snd_sof_dev *sdev, struct imx_clocks *clks)
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{
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return clk_bulk_prepare_enable(clks->num_dsp_clks, clks->dsp_clks);
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}
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EXPORT_SYMBOL(imx8_enable_clocks);
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void imx8_disable_clocks(struct snd_sof_dev *sdev, struct imx_clocks *clks)
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{
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clk_bulk_disable_unprepare(clks->num_dsp_clks, clks->dsp_clks);
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}
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EXPORT_SYMBOL(imx8_disable_clocks);
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MODULE_LICENSE("Dual BSD/GPL");
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