Enable SDKonfig options for RGB displays using bounce buffer

[pauleilio]

Board

ESP32-S3R8 SoC custom board

Device Description

Custom board with RGB display using PSRAM frame buffer

Hardware Configuration

RGB display, touch controller, RTC clock, I2C gpio expander

Version

latest development Release Candidate (RC-X)

IDE Name

Arduino IDE

Operating System

Windows 11

Flash frequency

80Mhz

PSRAM enabled

yes

Upload speed

921600

Description

During WiFi and BT operations a frame shift relating to bounce buffer out of sync occurs. This effect can be minimized by enabling this options

CONFIG_SPIRAM_FETCH_INSTRUCTIONS=y
CONFIG_SPIRAM_RODATA=y
CONFIG_LCD_RGB_RESTART_IN_VSYNC=y

We know we can pre-compile a library with a custom configuration but if it does not harm any other aspect of the board and have no detremental impact in general ESP-S3 use could they be enabled by default. The result in doing this on an RGB display is just a slight flash rather than a permanent shift of frame.

Sketch

N/A various tasks replicate the issue

Debug Message

N/A

Other Steps to Reproduce

The enabling of these options is a well known ESP-IDF solution for RGB displays using bounce buffers

I have checked existing issues, online documentation and the Troubleshooting Guide

• I confirm I have checked existing issues, online documentation and Troubleshooting guide.

[Jason2866]

CONFIG_LCD_RGB_RESTART_IN_VSYNC=y has negative side effects.
See https://espressif-docs.readthedocs-hosted.com/projects/esp-faq/en/latest/software-framework/peripherals/lcd.html#why-do-i-get-drift-overall-drift-of-the-display-when-driving-an-rgb-lcd-screen

[lbernstone]

These are simply not defaults that most people would want. See the idf_component example to build your own libraries.

[Jason2866]

I had this options enabled and had crashes with S3 QIO Flash and QIO PSRAM

CONFIG_SPIRAM_FETCH_INSTRUCTIONS=y
CONFIG_SPIRAM_RODATA=y

the seems to be faulty with some hardware configs and not useable for a general config.

[VojtechBartoska]

Hello, closing this as wontfix. Thanks for understanding.