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

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Message-ID: <20240730125023.710237-10-jbrunet@baylibre.com>
Date: Tue, 30 Jul 2024 14:50:19 +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 LATER 9/9] drm/meson: dw-hdmi: drop hdmi system clock setup

Poking the HHI syscon is a way to setup clocks behind CCF's back.
Drop these poke and let CCF handle this using DT assigned-clocks.

HHI is a collection of Amlogic devices, such as clocks, reset,
power domains and phys.

This is another step to get rid of HHI access in Amlogic display drivers
and possibly stop using the component API.

Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
---

 This change depends on:
 * 0602ba0dcd0e ("arm64: dts: amlogic: gx: correct hdmi clocks")
 * 1443b6ea806d ("arm64: dts: amlogic: setup hdmi system clock")

Time is needed for these changes to sink in u-boot and distros,
making this change safe to apply.

 drivers/gpu/drm/meson/meson_dw_hdmi.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
index 6c18d97b8b16..b54c1e3093e9 100644
--- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
@@ -111,7 +111,6 @@
 #define HDMITX_TOP_G12A_OFFSET	0x8000
 
 /* HHI Registers */
-#define HHI_HDMI_CLK_CNTL	0x1cc /* 0x73 */
 #define HHI_HDMI_PHY_CNTL0	0x3a0 /* 0xe8 */
 #define HHI_HDMI_PHY_CNTL1	0x3a4 /* 0xe9 */
 #define  PHY_CNTL1_INIT		0x03900000
@@ -419,9 +418,6 @@ static void meson_dw_hdmi_init(struct meson_dw_hdmi *meson_dw_hdmi)
 {
 	struct meson_drm *priv = meson_dw_hdmi->priv;
 
-	/* Enable clocks */
-	regmap_update_bits(priv->hhi, HHI_HDMI_CLK_CNTL, 0xffff, 0x100);
-
 	/* Bring out of reset */
 	regmap_write(meson_dw_hdmi->top, HDMITX_TOP_SW_RESET, 0);
 	msleep(20);
-- 
2.43.0