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i3c: mipi-i3c-hci: Correct RESP_DATA_LENGTH to bits 15:0

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The I3C HCI Response Descriptor defines DATA_LENGTH in Bits[15:0],
with Bits[23:16] reserved in all published HCI specification versions:
v1.0 (Table 91) and v1.1/v1.2 (Section 8.5). However,
RESP_DATA_LENGTH extracts Bits[21:0], incorrectly including six
reserved bits.

Update the mask to match the defined field width.

No functional change is expected because compliant controllers return
zero in reserved fields.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260920151248.46936-13-adrian.hunter@intel.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Adrian Hunter 2026-09-20 18:12:42 +03:00 committed by Alexandre Belloni
parent 9796ccba12
commit de243c3dd2
1 changed files with 1 additions and 1 deletions
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2
drivers/i3c/master/mipi-i3c-hci/cmd.h
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@ -24,7 +24,7 @@
*/
#define RESP_STATUS(resp) FIELD_GET(GENMASK(31, 28), resp)
#define RESP_TID(resp) FIELD_GET(GENMASK(27, 24), resp)
#define RESP_DATA_LENGTH(resp) FIELD_GET(GENMASK(21, 0), resp)
#define RESP_DATA_LENGTH(resp) FIELD_GET(GENMASK(15, 0), resp)
#define RESP_ERR_FIELD GENMASK(31, 28)