diff options
| author | Shawn Guo <shawn.guo@linaro.org> | 2023-01-02 20:20:34 +0800 |
|---|---|---|
| committer | Fabio Estevam <festevam@gmail.com> | 2023-12-13 08:44:59 -0300 |
| commit | b614ddb5d33556cfeefa874811484b98e05bc461 (patch) | |
| tree | 1eb3b8f75280e3c66f8d2b2d3bc2d4316dc8171e /drivers | |
| parent | be4a5f7c35685d228b3abc398a8d86c434274de5 (diff) | |
| download | u-boot-b614ddb5d33556cfeefa874811484b98e05bc461.zip u-boot-b614ddb5d33556cfeefa874811484b98e05bc461.tar.gz u-boot-b614ddb5d33556cfeefa874811484b98e05bc461.tar.bz2 | |
ddr: imx: Save the FW loading if it hasn't changed
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/ddr/imx/phy/helper.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/ddr/imx/phy/helper.c b/drivers/ddr/imx/phy/helper.c index 855a874..b9b2403 100644 --- a/drivers/ddr/imx/phy/helper.c +++ b/drivers/ddr/imx/phy/helper.c @@ -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)) { |