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54 lines
2.0 KiB
Diff
54 lines
2.0 KiB
Diff
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From 7105a86760bd9e4d107075cefc75016b693a5542 Mon Sep 17 00:00:00 2001
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From: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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Date: Wed, 19 Apr 2023 08:11:45 +0200
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Subject: [PATCH 16/42] Revert "thermal/drivers/mediatek: Add delay after
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thermal banks initialization"
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Some more testing revealed that this commit introduces a regression on some
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MT8173 Chromebooks and at least on one MT6795 Sony Xperia M5 smartphone due
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to the delay being apparently variable and machine specific.
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Another solution would be to delay for a bit more (~70ms) but this is not
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feasible for two reasons: first of all, we're adding an even bigger delay
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in a probe function; second, some machines need less, some may need even
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more, making the msleep at probe solution highly suboptimal.
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This reverts commit 10debf8c2da8011c8009dd4b3f6d0ab85891c81b.
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Fixes: 10debf8c2da8 ("thermal/drivers/mediatek: Add delay after thermal banks initialization")
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Reported-by: "kernelci.org bot" <bot@kernelci.org>
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Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
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Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
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Link: https://lore.kernel.org/r/20230419061146.22246-2-angelogioacchino.delregno@collabora.com
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---
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drivers/thermal/mediatek/auxadc_thermal.c | 11 ++++++++---
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1 file changed, 8 insertions(+), 3 deletions(-)
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--- a/drivers/thermal/mediatek/auxadc_thermal.c
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+++ b/drivers/thermal/mediatek/auxadc_thermal.c
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@@ -816,6 +816,14 @@ static int mtk_thermal_bank_temperature(
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mt, conf->bank_data[bank->id].sensors[i], raw);
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+ /*
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+ * The first read of a sensor often contains very high bogus
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+ * temperature value. Filter these out so that the system does
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+ * not immediately shut down.
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+ */
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+ if (temp > 200000)
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+ temp = 0;
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+
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if (temp > max)
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max = temp;
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}
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@@ -1273,9 +1281,6 @@ static int mtk_thermal_probe(struct plat
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platform_set_drvdata(pdev, mt);
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- /* Delay for thermal banks to be ready */
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- msleep(30);
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-
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tzdev = devm_thermal_of_zone_register(&pdev->dev, 0, mt,
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&mtk_thermal_ops);
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if (IS_ERR(tzdev)) {
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