linux-kernel - [PATCH 2/9] drm/meson: vclk: drop hdmi system clock setup

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Message-ID: <20240730125023.710237-3-jbrunet@baylibre.com>
Date: Tue, 30 Jul 2024 14:50:12 +0200
From: Jerome Brunet <jbrunet@...libre.com>
To: Neil Armstrong <neil.armstrong@...aro.org>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Daniel Vetter <daniel@...ll.ch>
Cc: Jerome Brunet <jbrunet@...libre.com>,
	Kevin Hilman <khilman@...libre.com>,
	Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
	dri-devel@...ts.freedesktop.org,
	linux-amlogic@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 2/9] drm/meson: vclk: drop hdmi system clock setup

Poking the HHI syscon is a way to setup clocks behind CCF's back.
Also, 2 drm code paths, the encoder and the hdmi-phy, are racing to do the
same setup of the HDMI system clock.

This clock is used is used by the HDMI phy and should not be set by the
encoder, so drop those HHI pokes from vclk.

Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
---
 drivers/gpu/drm/meson/meson_vclk.c | 8 --------
 1 file changed, 8 deletions(-)

diff --git a/drivers/gpu/drm/meson/meson_vclk.c b/drivers/gpu/drm/meson/meson_vclk.c
index 2a942dc6a6dc..bf5cc5d92346 100644
--- a/drivers/gpu/drm/meson/meson_vclk.c
+++ b/drivers/gpu/drm/meson/meson_vclk.c
@@ -813,14 +813,6 @@ static void meson_vclk_set(struct meson_drm *priv, unsigned int pll_base_freq,
 {
 	unsigned int m = 0, frac = 0;
 
-	/* Set HDMI-TX sys clock */
-	regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL,
-			   CTS_HDMI_SYS_SEL_MASK, 0);
-	regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL,
-			   CTS_HDMI_SYS_DIV_MASK, 0);
-	regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL,
-			   CTS_HDMI_SYS_EN, CTS_HDMI_SYS_EN);
-
 	/* Set HDMI PLL rate */
 	if (!od1 && !od2 && !od3) {
 		meson_hdmi_pll_generic_set(priv, pll_base_freq);
-- 
2.43.0