On 2024-04-10 16:30, Jonas Karlman wrote:
The commit 2cc6cde647e2 ("mmc: rockchip_sdhci: Limit number of blocks read in a single command") introduced a limit of number of blocks to read to fix a Data End Bit Error on RK3568 and RK3588. This had a side affect of significant slowing down reading FIT from eMMC.
After the commit 6de9d7b2f13c ("rockchip: rk35xx: Enable eMMC HS200 mode by default") the limit of number of blocks to read workaround is no longer necessary and at HS200+ a Data End Bit Error is no longer happening using PIO mode.
Change this limitation to allow reading more than 4 blocks with a single CMD18 command in PIO mode at HS200+ speed, keep using the 4 blocks limitation when loadig FIT from eMMC at lower speed than HS200.
Fixes: 2cc6cde647e2 ("mmc: rockchip_sdhci: Limit number of blocks read in a single command") Signed-off-by: Jonas Karlman jonas@kwiboo.se
Looking good to me. Thanks for peforming this dynamically, based on the actual MMC interface speed/mode.
Reviewed-by: Dragan Simic dsimic@manjaro.org
v2: Move cfg->b_max configuration to set_ios_post() ops
This significantly speed up FIT loading from eMMC on RK3588 boards with a mmc-hs200 prop in the sdhci node, and boards without a mmc-hs200 prop continue to work.
drivers/mmc/rockchip_sdhci.c | 26 ++++++++++++++++---------- 1 file changed, 16 insertions(+), 10 deletions(-)
diff --git a/drivers/mmc/rockchip_sdhci.c b/drivers/mmc/rockchip_sdhci.c index 706fb1235796..c889c7bc9855 100644 --- a/drivers/mmc/rockchip_sdhci.c +++ b/drivers/mmc/rockchip_sdhci.c @@ -391,6 +391,8 @@ static int rk3568_sdhci_config_dll(struct sdhci_host *host, u32 clock, bool enab static int rk3568_sdhci_set_ios_post(struct sdhci_host *host) { struct mmc *mmc = host->mmc;
struct rockchip_sdhc_plat *plat = dev_get_plat(mmc->dev);
struct mmc_config *cfg = &plat->cfg; u32 reg;
reg = sdhci_readw(host, SDHCI_HOST_CONTROL2);
@@ -437,6 +439,20 @@ static int rk3568_sdhci_set_ios_post(struct sdhci_host *host)
sdhci_writew(host, reg, DWCMSHC_EMMC_EMMC_CTRL);
- /*
* Reading more than 4 blocks with a single CMD18 command in PIO mode* triggers Data End Bit Error using a slower mode than HS200. Limitto
* reading max 4 blocks in one command when using PIO mode.*/- if (!(host->flags & USE_DMA)) {
if (mmc->selected_mode == MMC_HS_200 ||mmc->selected_mode == MMC_HS_400 ||mmc->selected_mode == MMC_HS_400_ES)cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;elsecfg->b_max = 4;- }
- return 0;
}
@@ -598,16 +614,6 @@ static int rockchip_sdhci_probe(struct udevice *dev) dev_read_bool(dev, "u-boot,spl-fifo-mode")) host->flags &= ~USE_DMA;
- /*
* Reading more than 4 blocks with a single CMD18 command in PIO mode* triggers Data End Bit Error on RK3568 and RK3588. Limit to reading* max 4 blocks in one command when using PIO mode.*/- if (!(host->flags & USE_DMA) &&
(device_is_compatible(dev, "rockchip,rk3568-dwcmshc") ||device_is_compatible(dev, "rockchip,rk3588-dwcmshc")))cfg->b_max = 4;- return sdhci_probe(dev);
}