linux-kernel - [PATCH 4/4] Revert "drm/vc4: hdmi: Enforce the minimum rate at runtime

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Message-Id: <20230126-rpi-display-fw-clk-cleanup-v1-4-d646ff6fb842@cerno.tech>
Date:   Thu, 26 Jan 2023 18:05:49 +0100
From:   Maxime Ripard <maxime@...no.tech>
To:     Emma Anholt <emma@...olt.net>, Maxime Ripard <mripard@...nel.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>
Cc:     Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Maxime Ripard <maxime@...no.tech>
Subject: [PATCH 4/4] Revert "drm/vc4: hdmi: Enforce the minimum rate at
 runtime_resume"

This reverts commit ae71ab585c819f83aec84f91eb01157a90552ef2.

Commit ae71ab585c81 ("drm/vc4: hdmi: Enforce the minimum rate at
runtime_resume") was introduced to work around an issue partly due to
the clk-bcm2835 driver on the RaspberryPi0-3.

Since we're not using that driver for our HDMI clocks, we can now revert
it.

Signed-off-by: Maxime Ripard <maxime@...no.tech>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index e82fe17c9532..18d84aab54bb 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -3350,15 +3350,6 @@ static int vc4_hdmi_runtime_resume(struct device *dev)
 	unsigned long rate;
 	int ret;
 
-	/*
-	 * The HSM clock is in the HDMI power domain, so we need to set
-	 * its frequency while the power domain is active so that it
-	 * keeps its rate.
-	 */
-	ret = clk_set_min_rate(vc4_hdmi->hsm_clock, HSM_MIN_CLOCK_FREQ);
-	if (ret)
-		return ret;
-
 	ret = clk_prepare_enable(vc4_hdmi->hsm_clock);
 	if (ret)
 		return ret;

-- 
2.39.1