Patch "drm/panfrost: fix power transition timeout warnings" has been added to the 6.8-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

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

    drm/panfrost: fix power transition timeout warnings

to the 6.8-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-panfrost-fix-power-transition-timeout-warnings.patch
and it can be found in the queue-6.8 subdirectory.

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



commit 1fa9139963ed223e0e14b6e09acf39ef663cd4c1
Author: Christian Hewitt <christianshewitt@xxxxxxxxx>
Date:   Fri Mar 22 16:45:25 2024 +0000

    drm/panfrost: fix power transition timeout warnings
    
    [ Upstream commit 2bd02f5a0bac4bb13e0da18652dc75ba0e4958ec ]
    
    Increase the timeout value to prevent system logs on Amlogic boards flooding
    with power transition warnings:
    
    [   13.047638] panfrost ffe40000.gpu: shader power transition timeout
    [   13.048674] panfrost ffe40000.gpu: l2 power transition timeout
    [   13.937324] panfrost ffe40000.gpu: shader power transition timeout
    [   13.938351] panfrost ffe40000.gpu: l2 power transition timeout
    ...
    [39829.506904] panfrost ffe40000.gpu: shader power transition timeout
    [39829.507938] panfrost ffe40000.gpu: l2 power transition timeout
    [39949.508369] panfrost ffe40000.gpu: shader power transition timeout
    [39949.509405] panfrost ffe40000.gpu: l2 power transition timeout
    
    The 2000 value has been found through trial and error testing with devices
    using G52 and G31 GPUs.
    
    Fixes: 22aa1a209018 ("drm/panfrost: Really power off GPU cores in panfrost_gpu_power_off()")
    Signed-off-by: Christian Hewitt <christianshewitt@xxxxxxxxx>
    Reviewed-by: Steven Price <steven.price@xxxxxxx>
    Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
    Signed-off-by: Steven Price <steven.price@xxxxxxx>
    Link: https://patchwork.freedesktop.org/patch/msgid/20240322164525.2617508-1-christianshewitt@xxxxxxxxx
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/panfrost/panfrost_gpu.c b/drivers/gpu/drm/panfrost/panfrost_gpu.c
index 9063ce2546422..fd8e44992184f 100644
--- a/drivers/gpu/drm/panfrost/panfrost_gpu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_gpu.c
@@ -441,19 +441,19 @@ void panfrost_gpu_power_off(struct panfrost_device *pfdev)
 
 	gpu_write(pfdev, SHADER_PWROFF_LO, pfdev->features.shader_present);
 	ret = readl_relaxed_poll_timeout(pfdev->iomem + SHADER_PWRTRANS_LO,
-					 val, !val, 1, 1000);
+					 val, !val, 1, 2000);
 	if (ret)
 		dev_err(pfdev->dev, "shader power transition timeout");
 
 	gpu_write(pfdev, TILER_PWROFF_LO, pfdev->features.tiler_present);
 	ret = readl_relaxed_poll_timeout(pfdev->iomem + TILER_PWRTRANS_LO,
-					 val, !val, 1, 1000);
+					 val, !val, 1, 2000);
 	if (ret)
 		dev_err(pfdev->dev, "tiler power transition timeout");
 
 	gpu_write(pfdev, L2_PWROFF_LO, pfdev->features.l2_present);
 	ret = readl_poll_timeout(pfdev->iomem + L2_PWRTRANS_LO,
-				 val, !val, 0, 1000);
+				 val, !val, 0, 2000);
 	if (ret)
 		dev_err(pfdev->dev, "l2 power transition timeout");
 }