diff --git a/target/linux/rockchip/patches-6.1/038-01-v6.3-mmc-sdhci-of-dwcmshc-Update-DLL-and-pre-change-delay-for.patch b/target/linux/rockchip/patches-6.1/038-01-v6.3-mmc-sdhci-of-dwcmshc-Update-DLL-and-pre-change-delay-for.patch new file mode 100644 index 0000000000..2bb542be36 --- /dev/null +++ b/target/linux/rockchip/patches-6.1/038-01-v6.3-mmc-sdhci-of-dwcmshc-Update-DLL-and-pre-change-delay-for.patch @@ -0,0 +1,60 @@ +From b75a52b0dda353aeefb4830a320589a363f49579 Mon Sep 17 00:00:00 2001 +From: Shawn Lin +Date: Thu, 2 Feb 2023 08:35:16 +0800 +Subject: [PATCH] mmc: sdhci-of-dwcmshc: Update DLL and pre-change delay for + rockchip platform + +For Rockchip platform, DLL bypass bit and start bit need to be set if +DLL is not locked. And adjust pre-change delay to 0x3 for better signal +test result. + +Signed-off-by: Shawn Lin +Link: https://lore.kernel.org/r/1675298118-64243-2-git-send-email-shawn.lin@rock-chips.com +Signed-off-by: Ulf Hansson +--- + drivers/mmc/host/sdhci-of-dwcmshc.c | 13 +++++++++---- + 1 file changed, 9 insertions(+), 4 deletions(-) + +--- a/drivers/mmc/host/sdhci-of-dwcmshc.c ++++ b/drivers/mmc/host/sdhci-of-dwcmshc.c +@@ -48,6 +48,7 @@ + #define DWCMSHC_EMMC_DLL_RXCLK_SRCSEL 29 + #define DWCMSHC_EMMC_DLL_START_POINT 16 + #define DWCMSHC_EMMC_DLL_INC 8 ++#define DWCMSHC_EMMC_DLL_BYPASS BIT(24) + #define DWCMSHC_EMMC_DLL_DLYENA BIT(27) + #define DLL_TXCLK_TAPNUM_DEFAULT 0x10 + #define DLL_TXCLK_TAPNUM_90_DEGREES 0xA +@@ -60,6 +61,7 @@ + #define DLL_RXCLK_NO_INVERTER 1 + #define DLL_RXCLK_INVERTER 0 + #define DLL_CMDOUT_TAPNUM_90_DEGREES 0x8 ++#define DLL_RXCLK_ORI_GATE BIT(31) + #define DLL_CMDOUT_TAPNUM_FROM_SW BIT(24) + #define DLL_CMDOUT_SRC_CLK_NEG BIT(28) + #define DLL_CMDOUT_EN_SRC_CLK_NEG BIT(29) +@@ -234,9 +236,12 @@ static void dwcmshc_rk3568_set_clock(str + sdhci_writel(host, extra, reg); + + if (clock <= 52000000) { +- /* Disable DLL and reset both of sample and drive clock */ +- sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_CTRL); +- sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_RXCLK); ++ /* ++ * Disable DLL and reset both of sample and drive clock. ++ * The bypass bit and start bit need to be set if DLL is not locked. ++ */ ++ sdhci_writel(host, DWCMSHC_EMMC_DLL_BYPASS | DWCMSHC_EMMC_DLL_START, DWCMSHC_EMMC_DLL_CTRL); ++ sdhci_writel(host, DLL_RXCLK_ORI_GATE, DWCMSHC_EMMC_DLL_RXCLK); + sdhci_writel(host, 0, DWCMSHC_EMMC_DLL_TXCLK); + sdhci_writel(host, 0, DECMSHC_EMMC_DLL_CMDOUT); + /* +@@ -279,7 +284,7 @@ static void dwcmshc_rk3568_set_clock(str + } + + extra = 0x1 << 16 | /* tune clock stop en */ +- 0x2 << 17 | /* pre-change delay */ ++ 0x3 << 17 | /* pre-change delay */ + 0x3 << 19; /* post-change delay */ + sdhci_writel(host, extra, dwc_priv->vendor_specific_area1 + DWCMSHC_EMMC_ATCTRL); + diff --git a/target/linux/rockchip/patches-6.1/038-02-v6.4-mmc-sdhci-of-dwcmshc-properly-determine-max-clock-on.patch b/target/linux/rockchip/patches-6.1/038-02-v6.4-mmc-sdhci-of-dwcmshc-properly-determine-max-clock-on.patch new file mode 100644 index 0000000000..9d9c1b5c1c --- /dev/null +++ b/target/linux/rockchip/patches-6.1/038-02-v6.4-mmc-sdhci-of-dwcmshc-properly-determine-max-clock-on.patch @@ -0,0 +1,52 @@ +From 49502408007b77ff290ce62e6218cefaeedcb31a Mon Sep 17 00:00:00 2001 +From: Vasily Khoruzhick +Date: Thu, 9 Mar 2023 17:03:49 -0800 +Subject: [PATCH] mmc: sdhci-of-dwcmshc: properly determine max clock on + Rockchip + +Currently .get_max_clock returns the current clock rate for cclk_emmc +on rk35xx, thus max clock gets set to whatever bootloader set it to. + +In case of u-boot, it is intentionally reset to 50 MHz if it boots +from eMMC, see mmc_deinit() in u-boot sources. As a result, HS200 and +HS400 modes are never selected by Linux, because dwcmshc_rk35xx_postinit +clears appropriate caps if host->mmc->f_max is < 52MHz + +cclk_emmc is not a fixed clock on rk35xx, so using +sdhci_pltfm_clk_get_max_clock is not appropriate here. + +Implement rk35xx_get_max_clock that returns actual max clock for cclk_emmc. + +Signed-off-by: Vasily Khoruzhick +Acked-by: Adrian Hunter +Link: https://lore.kernel.org/r/20230310010349.509132-1-anarsoul@gmail.com +Signed-off-by: Ulf Hansson +--- + drivers/mmc/host/sdhci-of-dwcmshc.c | 9 ++++++++- + 1 file changed, 8 insertions(+), 1 deletion(-) + +--- a/drivers/mmc/host/sdhci-of-dwcmshc.c ++++ b/drivers/mmc/host/sdhci-of-dwcmshc.c +@@ -126,6 +126,13 @@ static unsigned int dwcmshc_get_max_cloc + return pltfm_host->clock; + } + ++static unsigned int rk35xx_get_max_clock(struct sdhci_host *host) ++{ ++ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); ++ ++ return clk_round_rate(pltfm_host->clk, ULONG_MAX); ++} ++ + static void dwcmshc_check_auto_cmd23(struct mmc_host *mmc, + struct mmc_request *mrq) + { +@@ -343,7 +350,7 @@ static const struct sdhci_ops sdhci_dwcm + .set_clock = dwcmshc_rk3568_set_clock, + .set_bus_width = sdhci_set_bus_width, + .set_uhs_signaling = dwcmshc_set_uhs_signaling, +- .get_max_clock = sdhci_pltfm_clk_get_max_clock, ++ .get_max_clock = rk35xx_get_max_clock, + .reset = rk35xx_sdhci_reset, + .adma_write_desc = dwcmshc_adma_write_desc, + };