Linux clock framework development
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From: Liu Ying <victor.liu@nxp.com>
To: imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-clk@vger.kernel.org, dri-devel@lists.freedesktop.org
Cc: shawnguo@kernel.org, s.hauer@pengutronix.de,
	kernel@pengutronix.de, festevam@gmail.com, robh@kernel.org,
	krzk+dt@kernel.org, conor+dt@kernel.org, catalin.marinas@arm.com,
	will@kernel.org, abelvesa@kernel.org, peng.fan@nxp.com,
	mturquette@baylibre.com, sboyd@kernel.org,
	andrzej.hajda@intel.com, neil.armstrong@linaro.org,
	rfoss@kernel.org, Laurent.pinchart@ideasonboard.com,
	jonas@kwiboo.se, jernej.skrabec@gmail.com,
	maarten.lankhorst@linux.intel.com, mripard@kernel.org,
	tzimmermann@suse.de, airlied@gmail.com, simona@ffwll.ch,
	quic_bjorande@quicinc.com, geert+renesas@glider.be,
	dmitry.baryshkov@linaro.org, arnd@arndb.de,
	nfraprado@collabora.com, marex@denx.de
Subject: [PATCH v7 1/7] arm64: dts: imx8mp-skov-revb-mi1010ait-1cp1: Set "media_disp2_pix" clock rate to 70MHz
Date: Thu, 14 Nov 2024 14:57:53 +0800	[thread overview]
Message-ID: <20241114065759.3341908-2-victor.liu@nxp.com> (raw)
In-Reply-To: <20241114065759.3341908-1-victor.liu@nxp.com>

The LVDS panel "multi-inno,mi1010ait-1cp" used on this platform has
a typical pixel clock rate of 70MHz.  Set "media_disp2_pix" clock rate
to that rate, instead of the original 68.9MHz.  The LVDS serial clock
is controlled by "media_ldb" clock.  It should run at 490MHz(7-fold the
pixel clock rate due to single LVDS link).  Set "video_pll1" clock rate
and "media_ldb" to 490MHz to achieve that.

This should be able to suppress this LDB driver warning:
[   17.206644] fsl-ldb 32ec0000.blk-ctrl:bridge@5c: Configured LDB clock (70000000 Hz) does not match requested LVDS clock: 490000000 Hz

This also makes the display mode used by the panel pass mode validation
against pixel clock rate and "media_ldb" clock rate in a certain display
driver.

Signed-off-by: Liu Ying <victor.liu@nxp.com>
---
v7:
* No change.

v6:
* No change.

v5:
* No change.

v4:
* No change.

v3:
* New patch.

 .../dts/freescale/imx8mp-skov-revb-mi1010ait-1cp1.dts     | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8mp-skov-revb-mi1010ait-1cp1.dts b/arch/arm64/boot/dts/freescale/imx8mp-skov-revb-mi1010ait-1cp1.dts
index 30962922b361..2c75da5f064f 100644
--- a/arch/arm64/boot/dts/freescale/imx8mp-skov-revb-mi1010ait-1cp1.dts
+++ b/arch/arm64/boot/dts/freescale/imx8mp-skov-revb-mi1010ait-1cp1.dts
@@ -52,7 +52,7 @@ &lcdif2 {
 
 &lvds_bridge {
 	/* IMX8MP_CLK_MEDIA_LDB = IMX8MP_CLK_MEDIA_DISP2_PIX * 7 */
-	assigned-clock-rates = <482300000>;
+	assigned-clock-rates = <490000000>;
 	status = "okay";
 
 	ports {
@@ -70,10 +70,10 @@ &media_blk_ctrl {
 	 */
 	assigned-clock-rates = <500000000>, <200000000>, <0>,
 		/* IMX8MP_CLK_MEDIA_DISP2_PIX = pixelclk of lvds panel */
-		<68900000>,
+		<70000000>,
 		<500000000>,
-		/* IMX8MP_VIDEO_PLL1 = IMX8MP_CLK_MEDIA_LDB * 2 */
-		<964600000>;
+		/* IMX8MP_VIDEO_PLL1 = IMX8MP_CLK_MEDIA_LDB */
+		<490000000>;
 };
 
 &pwm4 {
-- 
2.34.1


  reply	other threads:[~2024-11-14  6:57 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-11-14  6:57 [PATCH v7 0/7] Add ITE IT6263 LVDS to HDMI converter support Liu Ying
2024-11-14  6:57 ` Liu Ying [this message]
2024-11-14  6:57 ` [PATCH v7 2/7] Revert "clk: imx: clk-imx8mp: Allow media_disp pixel clock reconfigure parent rate" Liu Ying
2024-11-15 10:19   ` Peng Fan
2024-11-15 12:31   ` Marek Vasut
2024-11-18  3:54     ` Ying Liu
2024-11-19  1:13       ` Marek Vasut
2024-11-19  8:18         ` Ying Liu
2024-11-19 21:42           ` Marek Vasut
2024-11-20  6:38             ` Ying Liu
2024-11-21  2:45               ` Marek Vasut
2024-11-22  3:39                 ` Ying Liu
2024-11-23 19:47                   ` Adam Ford
2024-11-23 20:11                   ` Marek Vasut
2024-11-14  6:57 ` [PATCH v7 3/7] drm/bridge: fsl-ldb: Get the next non-panel bridge Liu Ying
2024-11-14  6:57 ` [PATCH v7 4/7] drm/bridge: fsl-ldb: Use clk_round_rate() to validate "ldb" clock rate Liu Ying
2024-11-14  6:57 ` [PATCH v7 5/7] drm/bridge: fsl-ldb: Use clk_round_rate() to validate "pix" " Liu Ying
2024-11-14  6:57 ` [PATCH v7 6/7] arm64: dts: imx8mp-evk: Add NXP LVDS to HDMI adapter cards Liu Ying
2024-11-14  6:57 ` [PATCH v7 7/7] arm64: defconfig: Enable ITE IT6263 driver Liu Ying
2024-12-17 14:07 ` [PATCH v7 0/7] Add ITE IT6263 LVDS to HDMI converter support Maxime Ripard
2024-12-18  6:02   ` Liu Ying
2025-01-28  9:21     ` Maxime Ripard
2025-02-07  7:44       ` Liu Ying

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