drivers: mipi_dbi: stm32: move barriers outside of the loop (84349e85) · Commits · Wenxi XU / zephyr

drivers/mipi_dbi/mipi_dbi_stm32_fmc.c

+9 −6

Original line number	Diff line number	Diff line
		@@ -93,9 +93,11 @@ int mipi_dbi_stm32_fmc_command_write(const struct device *dev,

		for (i = 0U; i < len; i++) {
		sys_write16((uint16_t)data_buf[i], config->data_addr);
		if (IS_ENABLED(CONFIG_MIPI_DBI_STM32_FMC_MEM_BARRIER)) {
		barrier_dsync_fence_full();
		}

		if (IS_ENABLED(CONFIG_MIPI_DBI_STM32_FMC_MEM_BARRIER) && (len != 0U)) {
		/* barrier is only needed if the loop wrote data */
		barrier_dsync_fence_full();
		}

		return 0;
		@@ -118,10 +120,11 @@ static int mipi_dbi_stm32_fmc_write_display(const struct device *dev,

		for (i = 0U; i < desc->buf_size; i += 2) {
		sys_write16(sys_get_le16(&framebuf[i]), config->data_addr);
		}

		if (IS_ENABLED(CONFIG_MIPI_DBI_STM32_FMC_MEM_BARRIER)) {
		barrier_dsync_fence_full();
		}
		}

		return 0;
		}