Patch "drm/xe/oa: Allow oa_exponent value of 0" has been added to the 6.13-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    drm/xe/oa: Allow oa_exponent value of 0

to the 6.13-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-xe-oa-allow-oa_exponent-value-of-0.patch
and it can be found in the queue-6.13 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 26071e9a2703203d9d6d40b3e5eb6a49c6387b56
Author: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@xxxxxxxxx>
Date:   Fri Feb 21 13:33:52 2025 -0800

    drm/xe/oa: Allow oa_exponent value of 0
    
    [ Upstream commit 5bd566703e16b17d17f4fb648440d54f8967462c ]
    
    OA exponent value of 0 is a valid value for periodic reports. Allow user
    to pass 0 for the OA sampling interval since it gets converted to 2 gt
    clock ticks.
    
    v2: Update the check in xe_oa_stream_init as well (Ashutosh)
    v3: Fix mi-rpc failure by setting default exponent to -1 (CI)
    v4: Add the Fixes tag
    
    Fixes: b6fd51c62119 ("drm/xe/oa/uapi: Define and parse OA stream properties")
    Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@xxxxxxxxx>
    Reviewed-by: Ashutosh Dixit <ashutosh.dixit@xxxxxxxxx>
    Link: https://patchwork.freedesktop.org/patch/msgid/20250221213352.1712932-1-umesh.nerlige.ramappa@xxxxxxxxx
    (cherry picked from commit 30341f0b8ea71725cc4ab2c43e3a3b749892fc92)
    Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/xe/xe_oa.c b/drivers/gpu/drm/xe/xe_oa.c
index 913f6ba606370..5c50ca8cd8e78 100644
--- a/drivers/gpu/drm/xe/xe_oa.c
+++ b/drivers/gpu/drm/xe/xe_oa.c
@@ -1766,7 +1766,7 @@ static int xe_oa_stream_init(struct xe_oa_stream *stream,
 	stream->oa_buffer.format = &stream->oa->oa_formats[param->oa_format];
 
 	stream->sample = param->sample;
-	stream->periodic = param->period_exponent > 0;
+	stream->periodic = param->period_exponent >= 0;
 	stream->period_exponent = param->period_exponent;
 	stream->no_preempt = param->no_preempt;
 	stream->wait_num_reports = param->wait_num_reports;
@@ -2058,6 +2058,7 @@ int xe_oa_stream_open_ioctl(struct drm_device *dev, u64 data, struct drm_file *f
 	}
 
 	param.xef = xef;
+	param.period_exponent = -1;
 	ret = xe_oa_user_extensions(oa, XE_OA_USER_EXTN_FROM_OPEN, data, 0, &param);
 	if (ret)
 		return ret;
@@ -2112,7 +2113,7 @@ int xe_oa_stream_open_ioctl(struct drm_device *dev, u64 data, struct drm_file *f
 		goto err_exec_q;
 	}
 
-	if (param.period_exponent > 0) {
+	if (param.period_exponent >= 0) {
 		u64 oa_period, oa_freq_hz;
 
 		/* Requesting samples from OAG buffer is a privileged operation */