Zephyr: improve render performance when using the NXP ELCDIF driver #7175
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
When this driver is using the DMA API, we cannot do partial updates. Previously, this code would then perform a full-screen DMA transfer for each region the renderer changes. Now we make modifications to the pixel data of the dirty regions, if required, and then do one fill-scren DMA transfer of the final render buffer.
tronical
approved these changes
Dec 19, 2024
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
When this driver is using the DMA API, we cannot do partial updates. Previously, this code would perform a full-screen DMA transfer for each region the renderer changes. Now we make modifications to the pixel data of the dirty regions, if required, and then do one full-screen DMA transfer of the final render buffer.
This means the time spent writing the pixel buffer to the display peaks at 38ms, rather than up-to-hundreds of ms before.