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ddr: imx: Save the FW loading if it hasn't changed

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Function ddr_load_train_firmware() is called 4 times in a loop by
ddr_cfg_phy(). The first 3 calls are all '1D' type and just loading the
same FWs.  Let's add a type check and save 2 of them.  This helps to
reduce DDRPHY training time from 269 ms down to 212 ms, and thus speed
up boot time ~ 50 ms.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Fabio Estevam <festevam@denx.de>
This commit is contained in:
Shawn Guo 2023-01-02 20:20:34 +08:00 • committed by Fabio Estevam
parent be4a5f7c35
commit b614ddb5d3
1 changed files with 7 additions and 0 deletions
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7
drivers/ddr/imx/phy/helper.c
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@ -49,6 +49,13 @@ void ddr_load_train_firmware(enum fw_type type)
unsigned long imem_start = (unsigned long)_end + fw_offset;
unsigned long dmem_start;
unsigned long imem_len = IMEM_LEN, dmem_len = DMEM_LEN;
static enum fw_type last_type = -1;
/* If FW doesn't change, we can save the loading. */
if (last_type == type)
return;
last_type = type;
#ifdef CONFIG_SPL_OF_CONTROL
if (gd->fdt_blob && !fdt_check_header(gd->fdt_blob)) {