linux-kernel - [RFC PATCH 24/40] soundwire: cadence_master: use BIOS defaults for frame shape

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Message-Id: <20190725234032.21152-25-pierre-louis.bossart@linux.intel.com>
Date:   Thu, 25 Jul 2019 18:40:16 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     alsa-devel@...a-project.org
Cc:     linux-kernel@...r.kernel.org, tiwai@...e.de, broonie@...nel.org,
        vkoul@...nel.org, gregkh@...uxfoundation.org, jank@...ence.com,
        srinivas.kandagatla@...aro.org, slawomir.blauciak@...el.com,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Sanyog Kale <sanyog.r.kale@...el.com>
Subject: [RFC PATCH 24/40] soundwire: cadence_master: use BIOS defaults for frame shape

Remove hard-coding and use BIOS values. If they are wrong use default
48x2 frame shape.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
---
 drivers/soundwire/cadence_master.c | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c
index 442f78c00f09..d84344e29f71 100644
--- a/drivers/soundwire/cadence_master.c
+++ b/drivers/soundwire/cadence_master.c
@@ -175,7 +175,6 @@
 /* Driver defaults */
 
 #define CDNS_DEFAULT_CLK_DIVIDER		0
-#define CDNS_DEFAULT_FRAME_SHAPE		0x30
 #define CDNS_DEFAULT_SSP_INTERVAL		0x18
 #define CDNS_TX_TIMEOUT				2000
 
@@ -954,6 +953,20 @@ int sdw_cdns_pdi_init(struct sdw_cdns *cdns,
 }
 EXPORT_SYMBOL(sdw_cdns_pdi_init);
 
+static u32 cdns_set_default_frame_shape(int n_rows, int n_cols)
+{
+	u32 val;
+	int c;
+	int r;
+
+	r = sdw_find_row_index(n_rows);
+	c = sdw_find_col_index(n_cols);
+
+	val = (r << 3) | c;
+
+	return val;
+}
+
 /**
  * sdw_cdns_init() - Cadence initialization
  * @cdns: Cadence instance
@@ -977,7 +990,9 @@ int sdw_cdns_init(struct sdw_cdns *cdns)
 	cdns_writel(cdns, CDNS_MCP_CLK_CTRL0, val);
 
 	/* Set the default frame shape */
-	cdns_writel(cdns, CDNS_MCP_FRAME_SHAPE_INIT, CDNS_DEFAULT_FRAME_SHAPE);
+	val = cdns_set_default_frame_shape(prop->default_row,
+					   prop->default_col);
+	cdns_writel(cdns, CDNS_MCP_FRAME_SHAPE_INIT, val);
 
 	/* Set SSP interval to default value */
 	cdns_writel(cdns, CDNS_MCP_SSP_CTRL0, CDNS_DEFAULT_SSP_INTERVAL);
-- 
2.20.1