Hello,
I would like to connect 2 PREs to one IPU (as shown in the diagram below). I am using fb0 and fb1 (overlay). As I understand, the both framebuffers can be connected to separate PRE. Could you please guide me how to add a proper entry in devicetree?
When I write:
&mxcfb1 { /* fb0 and fb1 */
prefetch;
};
only the fb0 is using PRE.
Regards!
Hi jotes,
Kernel config:
CONFIG_MXC_IPU_V3_PRE=y
CONFIG_MXC_IPU_V3_PRG=y
DTS File:
memory: memory {
reg = <0x10000000 0xefffffff>;
};
&mxcfb1 {
prefetch;
};
&pre1 {
status = "okay";
};
&pre2 {
status = "okay";
};
&prg1 {
memory-region = <&memory>;
status = "okay";
};
&prg2 {
memory-region = <&memory>;
status = "okay";
};
There is one PRG per IPU and each PRG can handshake between 1 to 3 PRE and one IPU. Please see the image below:
PRE-0 is dedicated to IPU-1, PRE-3 is dedicated to IPU-2, PRE-1 and PRE-2 can be configured to be used together with either IPU-1 or IPU-2.
Regards
