Dear Nini,
Unfortunately I forgot to add a 'Fixes' tag to the patch, if I had, then it would have happened automatically.
Please remind me of this once kernel 6.9-rc1 is released since that will contain the fix. Then I can post the same patch to the stable mailinglist for inclusion in older kernels.
It has to wait until 6.9-rc1 is release though, patches need to be in mainline first before they can be backported.
Regards,
Hans
On 21/02/2024 07:30, Nini Song (宋宛妮) wrote:
Dear Hans,
Thank your reply. Could you also help to marge solution into v5.15? Our customer used v5.15 for MP production, which requires this solution.
BR, Nini Song On Mon, 2024-02-05 at 13:00 +0100, Hans Verkuil wrote:
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On 25/01/2024 14:28, nini.song@mediatek.com wrote:
From: "nini.song" nini.song@mediatek.com
The valid_la is used to check the length requirements, including special cases of Timer Status. If the length is shorter than 5, that means no Duration Available is returned, the message will be forced to be invalid.
However, the description of Duration Available in the spec is that this parameter may be returned when these cases, or that it can be optionally return when these cases. The key words in the spec description are flexible choices.
Good catch, the spec indeed says 'may', so dropping the check in this patch is the correct thing to do.
It's merged in our staging tree and it will appear in v6.9.
Regards,
Hans
Remove the special length check of Timer Status to fit the spec which is not compulsory about that.
Signed-off-by: Nini Song nini.song@mediatek.com
drivers/media/cec/core/cec-adap.c | 14 -------------- 1 file changed, 14 deletions(-)
diff --git a/drivers/media/cec/core/cec-adap.c b/drivers/media/cec/core/cec-adap.c index 5741adf09a2e..559a172ebc6c 100644 --- a/drivers/media/cec/core/cec-adap.c +++ b/drivers/media/cec/core/cec-adap.c @@ -1151,20 +1151,6 @@ void cec_received_msg_ts(struct cec_adapter *adap, if (valid_la && min_len) { /* These messages have special length requirements */ switch (cmd) { -case CEC_MSG_TIMER_STATUS: -if (msg->msg[2] & 0x10) { -switch (msg->msg[2] & 0xf) { -case CEC_OP_PROG_INFO_NOT_ENOUGH_SPACE: -case CEC_OP_PROG_INFO_MIGHT_NOT_BE_ENOUGH_SPACE: -if (msg->len < 5) -valid_la = false; -break; -} -} else if ((msg->msg[2] & 0xf) == CEC_OP_PROG_ERROR_DUPLICATE) { -if (msg->len < 5) -valid_la = false; -} -break; case CEC_MSG_RECORD_ON: switch (msg->msg[2]) { case CEC_OP_RECORD_SRC_OWN: