[PATCH 10/11] drm: meson: add CVBS support for S4

From: Ao Xu via B4 Relay <devnull+ao.xu.amlogic.com@kernel.org>
To: Neil Armstrong <neil.armstrong@linaro.org>,
	 Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
	 Maxime Ripard <mripard@kernel.org>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	 David Airlie <airlied@gmail.com>,
	Simona Vetter <simona@ffwll.ch>,  Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzk+dt@kernel.org>,
	 Conor Dooley <conor+dt@kernel.org>,
	Kevin Hilman <khilman@baylibre.com>,
	 Jerome Brunet <jbrunet@baylibre.com>,
	 Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc: dri-devel@lists.freedesktop.org,
	linux-amlogic@lists.infradead.org,  devicetree@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	 linux-kernel@vger.kernel.org, Ao Xu <ao.xu@amlogic.com>
Subject: [PATCH 10/11] drm: meson: add CVBS support for S4
Date: Fri, 10 Jan 2025 13:40:00 +0800	[thread overview]
Message-ID: <20250110-drm-s4-v1-10-cbc2d5edaae8@amlogic.com> (raw)
In-Reply-To: <20250110-drm-s4-v1-0-cbc2d5edaae8@amlogic.com>

From: Ao Xu <ao.xu@amlogic.com>

Add support for Composite Video Baseband Signal (CVBS)
in the Meson encoder driver for the Amlogic S4 SoC.

Signed-off-by: Ao Xu <ao.xu@amlogic.com>
---
 drivers/gpu/drm/meson/meson_encoder_cvbs.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/meson/meson_encoder_cvbs.c b/drivers/gpu/drm/meson/meson_encoder_cvbs.c
index d1191de855d910f9845bf2d5aef336e391982ba2..45ed800173c1754b23fdc8b53e9487530bcae5a3 100644
--- a/drivers/gpu/drm/meson/meson_encoder_cvbs.c
+++ b/drivers/gpu/drm/meson/meson_encoder_cvbs.c
@@ -30,6 +30,10 @@
 #define HHI_VDAC_CNTL1		0x2F8 /* 0xbe offset in data sheet */
 #define HHI_VDAC_CNTL1_G12A	0x2F0 /* 0xbe offset in data sheet */
 
+/* ANA VDAC Registers */
+#define ANACTRL_VDAC_CTRL0	0x2c0 /* 0xb0 offset in data sheet */
+#define ANACTRL_VDAC_CTRL1	0x2c4 /* 0xb1 offset in data sheet */
+
 struct meson_encoder_cvbs {
 	struct drm_encoder	encoder;
 	struct drm_bridge	bridge;
@@ -187,6 +191,9 @@ static void meson_encoder_cvbs_atomic_enable(struct drm_bridge *bridge,
 	} else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) {
 		regmap_write(priv->hhi, HHI_VDAC_CNTL0_G12A, 0x906001);
 		regmap_write(priv->hhi, HHI_VDAC_CNTL1_G12A, 0);
+	} else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_S4)) {
+		regmap_write(priv->hhi, ANACTRL_VDAC_CTRL0, 0x406802);
+		regmap_write(priv->hhi, ANACTRL_VDAC_CTRL1, 0xc4);
 	}
 }
 
@@ -201,6 +208,9 @@ static void meson_encoder_cvbs_atomic_disable(struct drm_bridge *bridge,
 	if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) {
 		regmap_write(priv->hhi, HHI_VDAC_CNTL0_G12A, 0);
 		regmap_write(priv->hhi, HHI_VDAC_CNTL1_G12A, 0);
+	} else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_S4)) {
+		regmap_write(priv->hhi, ANACTRL_VDAC_CTRL0, 0);
+		regmap_write(priv->hhi, ANACTRL_VDAC_CTRL1, 0);
 	} else {
 		regmap_write(priv->hhi, HHI_VDAC_CNTL0, 0);
 		regmap_write(priv->hhi, HHI_VDAC_CNTL1, 8);

-- 
2.43.0



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