From: bgolaszewski@baylibre.com (Bartosz Golaszewski)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 2/2] ARM: dts: da850: specify the maximum pixel clock rate for tilcdc
Date: Tue, 6 Dec 2016 14:13:46 +0100 [thread overview]
Message-ID: <1481030026-7329-3-git-send-email-bgolaszewski@baylibre.com> (raw)
In-Reply-To: <1481030026-7329-1-git-send-email-bgolaszewski@baylibre.com>
At maximum CPU frequency of 300 MHz the maximum pixel clock frequency
is 37.5 MHz[1]. We must filter out any mode for which the calculated
pixel clock rate would exceed this value.
Specify the max-pixelclock property for the display node for
da850-lcdk.
[1] http://processors.wiki.ti.com/index.php/OMAP-L1x/C674x/AM1x_LCD_Controller_(LCDC)_Throughput_and_Optimization_Techniques
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
arch/arm/boot/dts/da850.dtsi | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
index ffc6e1a..da86d80 100644
--- a/arch/arm/boot/dts/da850.dtsi
+++ b/arch/arm/boot/dts/da850.dtsi
@@ -452,6 +452,7 @@
compatible = "ti,da850-tilcdc";
reg = <0x213000 0x1000>;
interrupts = <52>;
+ max-pixelclock = <37500>;
status = "disabled";
};
};
--
2.9.3
WARNING: multiple messages have this Message-ID (diff)
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
To: Kevin Hilman <khilman@baylibre.com>,
Michael Turquette <mturquette@baylibre.com>,
Sekhar Nori <nsekhar@ti.com>, Rob Herring <robh+dt@kernel.org>,
Frank Rowand <frowand.list@gmail.com>,
Mark Rutland <mark.rutland@arm.com>,
Peter Ujfalusi <peter.ujfalusi@ti.com>,
Russell King <linux@armlinux.org.uk>
Cc: linux-devicetree <devicetree@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
linux-drm <dri-devel@lists.freedesktop.org>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>,
Tomi Valkeinen <tomi.valkeinen@ti.com>,
Jyri Sarha <jsarha@ti.com>,
arm-soc <linux-arm-kernel@lists.infradead.org>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Subject: [PATCH v4 2/2] ARM: dts: da850: specify the maximum pixel clock rate for tilcdc
Date: Tue, 6 Dec 2016 14:13:46 +0100 [thread overview]
Message-ID: <1481030026-7329-3-git-send-email-bgolaszewski@baylibre.com> (raw)
In-Reply-To: <1481030026-7329-1-git-send-email-bgolaszewski@baylibre.com>
At maximum CPU frequency of 300 MHz the maximum pixel clock frequency
is 37.5 MHz[1]. We must filter out any mode for which the calculated
pixel clock rate would exceed this value.
Specify the max-pixelclock property for the display node for
da850-lcdk.
[1] http://processors.wiki.ti.com/index.php/OMAP-L1x/C674x/AM1x_LCD_Controller_(LCDC)_Throughput_and_Optimization_Techniques
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
arch/arm/boot/dts/da850.dtsi | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
index ffc6e1a..da86d80 100644
--- a/arch/arm/boot/dts/da850.dtsi
+++ b/arch/arm/boot/dts/da850.dtsi
@@ -452,6 +452,7 @@
compatible = "ti,da850-tilcdc";
reg = <0x213000 0x1000>;
interrupts = <52>;
+ max-pixelclock = <37500>;
status = "disabled";
};
};
--
2.9.3
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
WARNING: multiple messages have this Message-ID (diff)
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
To: Kevin Hilman <khilman@baylibre.com>,
Michael Turquette <mturquette@baylibre.com>,
Sekhar Nori <nsekhar@ti.com>, Rob Herring <robh+dt@kernel.org>,
Frank Rowand <frowand.list@gmail.com>,
Mark Rutland <mark.rutland@arm.com>,
Peter Ujfalusi <peter.ujfalusi@ti.com>,
Russell King <linux@armlinux.org.uk>
Cc: LKML <linux-kernel@vger.kernel.org>,
arm-soc <linux-arm-kernel@lists.infradead.org>,
linux-drm <dri-devel@lists.freedesktop.org>,
linux-devicetree <devicetree@vger.kernel.org>,
Jyri Sarha <jsarha@ti.com>,
Tomi Valkeinen <tomi.valkeinen@ti.com>,
David Airlie <airlied@linux.ie>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: [PATCH v4 2/2] ARM: dts: da850: specify the maximum pixel clock rate for tilcdc
Date: Tue, 6 Dec 2016 14:13:46 +0100 [thread overview]
Message-ID: <1481030026-7329-3-git-send-email-bgolaszewski@baylibre.com> (raw)
In-Reply-To: <1481030026-7329-1-git-send-email-bgolaszewski@baylibre.com>
At maximum CPU frequency of 300 MHz the maximum pixel clock frequency
is 37.5 MHz[1]. We must filter out any mode for which the calculated
pixel clock rate would exceed this value.
Specify the max-pixelclock property for the display node for
da850-lcdk.
[1] http://processors.wiki.ti.com/index.php/OMAP-L1x/C674x/AM1x_LCD_Controller_(LCDC)_Throughput_and_Optimization_Techniques
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
arch/arm/boot/dts/da850.dtsi | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
index ffc6e1a..da86d80 100644
--- a/arch/arm/boot/dts/da850.dtsi
+++ b/arch/arm/boot/dts/da850.dtsi
@@ -452,6 +452,7 @@
compatible = "ti,da850-tilcdc";
reg = <0x213000 0x1000>;
interrupts = <52>;
+ max-pixelclock = <37500>;
status = "disabled";
};
};
--
2.9.3
next prev parent reply other threads:[~2016-12-06 13:13 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-06 13:13 [PATCH v4 0/2] ARM: dts: da850: tilcdc related DT changes Bartosz Golaszewski
2016-12-06 13:13 ` Bartosz Golaszewski
2016-12-06 13:13 ` Bartosz Golaszewski
2016-12-06 13:13 ` [PATCH v4 1/2] ARM: dts: da850-lcdk: add the dumb-vga-dac node Bartosz Golaszewski
2016-12-06 13:13 ` Bartosz Golaszewski
2016-12-06 13:42 ` Laurent Pinchart
2016-12-06 13:42 ` Laurent Pinchart
2016-12-06 13:42 ` Laurent Pinchart
2016-12-06 13:13 ` Bartosz Golaszewski [this message]
2016-12-06 13:13 ` [PATCH v4 2/2] ARM: dts: da850: specify the maximum pixel clock rate for tilcdc Bartosz Golaszewski
2016-12-06 13:13 ` Bartosz Golaszewski
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