On Mon, Oct 26, 2026 at 01:43:28PM +0100, Francesco Dolcini wrote: > On Mon, Oct 26, 2026 at 09:25:20AM -0300, Leonardo Costa wrote: > > Hi Frank, > > > > On Tue, Oct 20, 2026 at 11:01:30AM -0500, Frank Li wrote: > > > On Tue, Oct 20, 2026 at 07:33:10AM -0300, Leonardo Costa wrote: > > > > On Mon, Oct 19, 2026 at 02:37:41PM -0500, Frank Li wrote: > > > > > On Mon, Oct 19, 2026 at 07:17:16AM -0300, Leonardo Costa wrote: > > > > > > From: Leonardo Costa <[email protected]> > > > > > > > > > > > > Add a device tree overlay for the VGA output available on the Apalis > > > > > > Evaluation Board, which is driven from a parallel RGB interface > > > > > > passing > > > > > > through a non-programmable video DAC to a VGA connector, without > > > > > > VESA > > > > > > DDC I2C signals. > > > > > > > > > > > > The non-programmable video DAC consists of a simple resistor ladder > > > > > > that > > > > > > converts the digital 16-bit RGB signal to VGA. The VGA output is > > > > > > gated by > > > > > > an active-low data-enable signal. > > > > > > > > > > > > The overlay is also combined with the various Apalis Evaluation > > > > > > Board > > > > > > device trees to provide ready-to-use DTBs. > > > > > > > > > > > > Signed-off-by: Leonardo Costa <[email protected]> > > > > > > --- > > > > > > arch/arm/boot/dts/nxp/imx/Makefile | 21 ++++++ > > > > > > .../boot/dts/nxp/imx/imx6q-apalis-eval-vga.dtso | 80 > > > > > > ++++++++++++++++++++++ > > > > > > > > > > what's difference with > > > > > > > > > > https://lore.kernel.org/imx/[email protected]/T/#u > > > > > > > > > > Is it possible share one dtso also? > > > > > > > > > > Frank > > > > > > > > Hi Frank, > > > > > > > > The Apalis iMX6 one needs to set up the connection between the IPU the > > > > LCD interface (endpoints ipu2_di0_disp0 and vga_display_in), and the > > > > Colibri iMX6 one uses a DVI connector instead of a VGA one. Most of all, > > > > the bridge on the Colibri iMX6 doesn't have any control signals, while > > > > this one on the Apalis iMX6 has an active-low data-enable signal > > > > > > This make sense to use difference dtso to cover it. Is it use name > > > imx6q-ipu-di0-vga.dtso, because this dtso have not boards specific part, > > > which can reuse for other similar hardware? Or we can rename it when reuse > > > happen. > > > > I think the overlay should be kept as imx6q-apalis-eval-vga.dtso. As it > > currently is, it's easy to identify the hardware it may be used with. If > > another board is added which uses the same interface in this same way, > > we can evaluate if it's adequate to change names for reusability.
Okay, we can rename at that time. Frank > > 2 more cents. There is no such other board in the toradex portfolio and > it's very unlikely we are going to build any new board with an old VGA > interface. > > Francesco > > >
