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soundwire: cadence: reorder MCP_CONFIG settings

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Follow hardware programming flows and add placeholder comment for
multi-master mode.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200317163329.25501-12-pierre-louis.bossart@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Pierre-Louis Bossart 2020-03-17 11:33:23 -05:00 committed by Vinod Koul
parent 1dd6a17f35
commit b62e76cf39
1 changed files with 12 additions and 10 deletions
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22
drivers/soundwire/cadence_master.c
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@ -1097,20 +1097,22 @@ int sdw_cdns_init(struct sdw_cdns *cdns)
/* Configure mcp config */
val = cdns_readl(cdns, CDNS_MCP_CONFIG);
/* Set Max cmd retry to 15 */
val |= CDNS_MCP_CONFIG_MCMD_RETRY;
/* Set frame delay between PREQ and ping frame to 15 frames */
val |= 0xF << SDW_REG_SHIFT(CDNS_MCP_CONFIG_MPREQ_DELAY);
/* Disable auto bus release */
val &= ~CDNS_MCP_CONFIG_BUS_REL;
/* Set cmd mode for Tx and Rx cmds */
val &= ~CDNS_MCP_CONFIG_CMD;
/* Disable sniffer mode */
val &= ~CDNS_MCP_CONFIG_SNIFFER;
/* Set cmd mode for Tx and Rx cmds */
val &= ~CDNS_MCP_CONFIG_CMD;
/* Disable auto bus release */
val &= ~CDNS_MCP_CONFIG_BUS_REL;
/* Multi-master support to be added here */
/* Set frame delay between PREQ and ping frame to 15 frames */
val |= 0xF << SDW_REG_SHIFT(CDNS_MCP_CONFIG_MPREQ_DELAY);
/* Set Max cmd retry to 15 */
val |= CDNS_MCP_CONFIG_MCMD_RETRY;
cdns_writel(cdns, CDNS_MCP_CONFIG, val);