| Message ID | 1481623759-12786-6-git-send-email-bgolaszewski@baylibre.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tuesday 13 December 2016 03:39 PM, Bartosz Golaszewski wrote: > 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 This wiki page is not really a TI datasheet and can change without notice. I changed this to refer to http://www.ti.com/lit/ds/symlink/am1808.pdf (SPRS653E, revised March 2014), table 6-110. Applied to v4.11/dt Thanks, Sekhar
diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi index 6b0ef3d..58b1566 100644 --- a/arch/arm/boot/dts/da850.dtsi +++ b/arch/arm/boot/dts/da850.dtsi @@ -462,6 +462,7 @@ compatible = "ti,da850-tilcdc"; reg = <0x213000 0x1000>; interrupts = <52>; + max-pixelclock = <37500>; status = "disabled"; }; };
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(+)