feature: lvgl performance tuning #39
Conversation
|
@pdgendt would you be willing to take a look at this, or are you aware of anyone else who could? |
|
@carlescufi it looks like you have merge/approval rights. Do you know who else could review this PR? Maybe @jfischer-no? |
I am collaborator for LVGL, @carlescufi could you assign a role that would allow me to add reviews in this project? |
zephyr/Kconfig.memory
Outdated
| Force full refresh of display on update. Useful for displays where | ||
| framebuffer is stored in RAM |
There was a problem hiding this comment.
This is meaningless. I do not know of any display controller where it is not stored in RAM. I guess what you mean is that it is performance gain to write complete area at once since display controller RAM is connected to CPU or is part of SoC's RAM.
There was a problem hiding this comment.
Fair point, this could be more clear. I updated the description to be the following:
Force full refresh of display on update. When combined with
LV_Z_VDB_SIZE, this setting can improve performance for display
controllers that require a framebuffer to be present in system memory,
since the controller can render the LVGL framebuffer directly
Enable setting full_refresh bit for LVGL displays, which forces LVGL to refresh the entire framebuffer on each call to display_write. This is useful for display hardware that can directly render a framebuffer to the display, as the LVGL buffer can now be passed directly to the display hardware without expensive memory copies into an intermediate buffer. Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
Allow setting LVGL rendering buffer alignment. This is useful if the rendering buffers will be passed directly as the framebuffer to display hardware, which may have more restrictive alignment requirements. Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
Some applications may want to locate LVGL rendering buffers in a custom memory location, such as tightly coupled or external memory. To facilitate this, add a Kconfig CONFIG_LV_Z_VBD_CUSTOM_SECTION, which when set will locate the LVGL rendering buffers in a section labelled as ".lvgl_buf". This section can then be located in a custom memory region by the application. Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
danieldegrasse
force-pushed
the
feature/lvgl_performance_tuning
branch
from
c89a6c0
to
c41dbc7
Compare
|
@pdgendt I am not sure if you are now authorized to merged, but it does look like your review counts towards the criteria for merging. |
Description of the feature or fix
This PR introduces several performance tuning settings for the Zephyr LVGL port:
full_refreshbit, which configures LVGL to only calldisplay_writewith a buffer equivalent in size to the display. This improves performance for display controllers that render from a framebuffer in memory significantly, since they no longer have to copy the framebuffer passed intodisplay_writeinto a driver allocated framebuffer