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drivers: display: st7796s: respect rgb_is_inverted in 8080 8 bit mode 

Update ST7796s display driver to respect the setting of rgb_is_inverted
in 8080 8 bit mode, as it was previously not applied for this mode.

Also, simplify the logic check for 16 bit mode- the new check is
functionally equivalent, but no longer inverts both boolean values.

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
This commit is contained in:
Daniel DeGrasse 2024-08-26 15:48:00 +00:00 committed by Fabio Baltieri
parent 3604aba75b
commit 04726a22cb
1 changed files with 9 additions and 2 deletions
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11
drivers/display/display_st7796s.c
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@ -118,7 +118,13 @@ static int st7796s_get_pixelfmt(const struct device *dev)
* and vice versa.
*/
if (config->dbi_config.mode == MIPI_DBI_MODE_8080_BUS_8_BIT) {
if (config->madctl & ST7796S_MADCTL_BGR) {
/*
* Similar to the handling for other interface modes,
* invert the reported pixel format if "rgb_is_inverted"
* is enabled
*/
if (((bool)(config->madctl & ST7796S_MADCTL_BGR)) !=
config->rgb_is_inverted) {
return PIXEL_FORMAT_RGB_565;
} else {
return PIXEL_FORMAT_BGR_565;
@ -133,7 +139,8 @@ static int st7796s_get_pixelfmt(const struct device *dev)
* if rgb_is_inverted is enabled.
* It is a workaround for supporting buggy modules that display RGB as BGR.
*/
if (!(config->madctl & ST7796S_MADCTL_BGR) != !config->rgb_is_inverted) {
if (((bool)(config->madctl & ST7796S_MADCTL_BGR)) !=
config->rgb_is_inverted) {
return PIXEL_FORMAT_BGR_565;
} else {
return PIXEL_FORMAT_RGB_565;