ulfh/next boot bisection: v5.1-rc1-22-gb3725d97ba75 on rk3399-gru-kevin

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ulfh/next boot bisection: v5.1-rc1-22-gb3725d97ba75 on rk3399-gru-kevin

Summary:
  Start:      b3725d97ba75 Merge branch 'fixes' into next
  Details:    https://kernelci.org/boot/id/5c8fa85d59b5148afcfe6052
  Plain log:  https://storage.kernelci.org//ulfh/next/v5.1-rc1-22-gb3725d97ba75/arm64/defconfig/gcc-7/lab-collabora/boot-rk3399-gru-kevin.txt
  HTML log:   https://storage.kernelci.org//ulfh/next/v5.1-rc1-22-gb3725d97ba75/arm64/defconfig/gcc-7/lab-collabora/boot-rk3399-gru-kevin.html
  Result:     d6a6d722481f mmc: dw_mmc-rockchip: Enable hardware unbusy interrupt support

Checks:
  revert:     PASS
  verify:     PASS

Parameters:
  Tree:       ulfh
  URL:        https://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc.git
  Branch:     next
  Target:     rk3399-gru-kevin
  CPU arch:   arm64
  Lab:        lab-collabora
  Compiler:   gcc-7
  Config:     defconfig
  Test suite: boot

Breaking commit found:

-------------------------------------------------------------------------------
commit d6a6d722481f357eafe7b798fe6fdadd2f5ac6bd
Author: Shawn Lin <shawn.lin@rock-chips.com>
Date:   Tue Mar 12 15:35:09 2019 +0800

    mmc: dw_mmc-rockchip: Enable hardware unbusy interrupt support
    
    The new register for controlling hardware unbusy interrupt
    is in 0x120. It looks like:
    
    |------------------------------------------------------------|
    |Bit    |  Attribute |  Reset Value  | Description           |
    |------------------------------------------------------------|
    |31:25  |    RO      |      0x0      |  reserved             |
    |------------------------------------------------------------|
    |24     |    RO      |      0x0      |  rdyint_cnt_finish    |
    |       |            |               |When high, it indicates|
    |       |            |               |that the rdyint counter|
    |       |            |               |is finished.           |
    |------------------------------------------------------------|
    |23:16  |    RO      |      0x0      |  rdyint_cnt_status    |
    |       |            |               |Couner status, reflect |
    |       |            |               |internal counter value.|
    |------------------------------------------------------------|
    |15:9   |    RO      |      0x0      |  reserved             |
    |------------------------------------------------------------|
    |8      |    RW      |      0x0      |  rdyint_gen_working   |
    |       |            |               |When set, IP starts to |
    |       |            |               |count and generate one |
    |       |            |               |rdyint trigger. After  |
    |       |            |               |the rdyint trigger is  |
    |       |            |               |generated, it will be  |
    |       |            |               |cleaned automatically. |
    |       |            |               |Software should set it |
    |       |            |               |again next time.       |
    |------------------------------------------------------------|
    |7:0    |    RW      |      0xff     |   rdyint_gen_maxval   |
    |       |            |               |Max counter value for  |
    |       |            |               |the IP to count when   |
    |       |            |               |rdyint_gen_working is  |
    |       |            |               |set. This counter is   |
    |       |            |               |based on biu_clk.      |
    |------------------------------------------------------------|
    
    Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
    Tested-by: Ziyuan Xu <xzy.xu@rock-chips.com>
    Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/dw_mmc-rockchip.c b/drivers/mmc/host/dw_mmc-rockchip.c
index 8c86a800a8fd..85b1e42782a0 100644
--- a/drivers/mmc/host/dw_mmc-rockchip.c
+++ b/drivers/mmc/host/dw_mmc-rockchip.c
@@ -20,6 +20,9 @@
 #include "dw_mmc-pltfm.h"
 
 #define RK3288_CLKGEN_DIV       2
+#define RKMMC_RDYINT_GEN	0x120
+#define RKMMC_RDYINT_GEN_WORKING BIT(8)
+#define RKMMC_RDYINT_GEN_MAXVAL GENMASK(7, 0)
 
 struct dw_mci_rockchip_priv_data {
 	struct clk		*drv_clk;
@@ -28,6 +31,23 @@ struct dw_mci_rockchip_priv_data {
 	int			num_phases;
 };
 
+static int dw_mci_rockchip_prepare_hw_unbusy(struct dw_mci *host,
+					     bool enable)
+{
+	u32 reg = readl(host->regs + RKMMC_RDYINT_GEN);
+
+	if (enable)
+		/* Self-clean when generating unbusy int */
+		reg |= RKMMC_RDYINT_GEN_WORKING;
+	else
+		/* Otherwise do it manually to avoid racing condition */
+		reg &= ~RKMMC_RDYINT_GEN_WORKING;
+
+	writel(reg, host->regs + RKMMC_RDYINT_GEN);
+
+	return 0;
+}
+
 static void dw_mci_rk3288_set_ios(struct dw_mci *host, struct mmc_ios *ios)
 {
 	struct dw_mci_rockchip_priv_data *priv = host->priv;
@@ -301,6 +321,15 @@ static int dw_mci_rockchip_init(struct dw_mci *host)
 				    "rockchip,rk3288-dw-mshc"))
 		host->bus_hz /= RK3288_CLKGEN_DIV;
 
+	/* Some Rockchip SoCs use hw unbusy int */
+	if (of_device_is_compatible(host->dev->of_node,
+				    "rockchip,rk1808-dw-mshc")) {
+		host->hw_unbusy_int = 16;
+		writel(~(RKMMC_RDYINT_GEN_WORKING |
+			 RKMMC_RDYINT_GEN_MAXVAL),
+		       host->regs + RKMMC_RDYINT_GEN);
+	}
+
 	return 0;
 }
 
@@ -322,6 +351,7 @@ static const struct dw_mci_drv_data rk3288_drv_data = {
 	.set_ios		= dw_mci_rk3288_set_ios,
 	.execute_tuning		= dw_mci_rk3288_execute_tuning,
 	.parse_dt		= dw_mci_rk3288_parse_dt,
+	.prepare_hw_unbusy      = dw_mci_rockchip_prepare_hw_unbusy,
 	.init			= dw_mci_rockchip_init,
 };
-------------------------------------------------------------------------------


Git bisection log:

-------------------------------------------------------------------------------
git bisect start
# good: [4d3d534e9fd596e6f70ee19c75f0cd9aa5be2588] Merge branch 'fixes' into next
git bisect good 4d3d534e9fd596e6f70ee19c75f0cd9aa5be2588
# bad: [b3725d97ba75b0cf6d0eb1e3836915ad234f6f3d] Merge branch 'fixes' into next
git bisect bad b3725d97ba75b0cf6d0eb1e3836915ad234f6f3d
# good: [e266ca36da7de45b64b05698e98e04b578a88888] Merge tag 'staging-5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
git bisect good e266ca36da7de45b64b05698e98e04b578a88888
# good: [36011ddc78395b59a8a418c37f20bcc18828f1ef] Merge tag 'gfs2-5.1.fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2
git bisect good 36011ddc78395b59a8a418c37f20bcc18828f1ef
# good: [6bc3fe8e7e172d5584e529a04cf9eec946428768] tools: mark 'test_vmalloc.sh' executable
git bisect good 6bc3fe8e7e172d5584e529a04cf9eec946428768
# good: [dc2535be1fd547fbd56aff091370280007b0a1af] Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
git bisect good dc2535be1fd547fbd56aff091370280007b0a1af
# good: [e8a71a38668919c53e6ca9dd1bfa977e5690523f] Merge tag 'ntb-5.1' of git://github.com/jonmason/ntb
git bisect good e8a71a38668919c53e6ca9dd1bfa977e5690523f
# good: [636deed6c0bc137a7c4f4a97ae1fcf0ad75323da] Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
git bisect good 636deed6c0bc137a7c4f4a97ae1fcf0ad75323da
# good: [477558d7e8d82b59a650e193a5651cf25b794dbc] Merge tag 'scsi-misc' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
git bisect good 477558d7e8d82b59a650e193a5651cf25b794dbc
# good: [80b98e92ebcb4433b86fd32b5d82ec6b0d75cf59] Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
git bisect good 80b98e92ebcb4433b86fd32b5d82ec6b0d75cf59
# good: [9e98c678c2d6ae3a17cb2de55d17f69dddaa231b] Linux 5.1-rc1
git bisect good 9e98c678c2d6ae3a17cb2de55d17f69dddaa231b
# good: [311f059c6aaeb6f5c21459041523a07459d7369b] mmc: sdhci-of-esdhc: add erratum A-009204 support
git bisect good 311f059c6aaeb6f5c21459041523a07459d7369b
# good: [705a0f28811322cb8c578c35a9d07fae7c683845] mmc: dw_mmc: Add hardware unbusy interrupt support
git bisect good 705a0f28811322cb8c578c35a9d07fae7c683845
# bad: [60cbf5c5e71dab0586455ae846fb67353d2554bf] mmc: renesas_sdhi: update copyright information
git bisect bad 60cbf5c5e71dab0586455ae846fb67353d2554bf
# bad: [eeddc8e5fb23e85ea71e7f03d44b1a3845305213] mmc: mxs-mmc: Enable MMC_CAP_ERASE
git bisect bad eeddc8e5fb23e85ea71e7f03d44b1a3845305213
# bad: [d6a6d722481f357eafe7b798fe6fdadd2f5ac6bd] mmc: dw_mmc-rockchip: Enable hardware unbusy interrupt support
git bisect bad d6a6d722481f357eafe7b798fe6fdadd2f5ac6bd
# first bad commit: [d6a6d722481f357eafe7b798fe6fdadd2f5ac6bd] mmc: dw_mmc-rockchip: Enable hardware unbusy interrupt support
-------------------------------------------------------------------------------