Add patch to improve MMC/SD speed on Raspberry Pi (bcm283x)

1 files changed, 107 insertions, 0 deletions

diff --git a/bcm283x-mmc-imp-speed.patch b/bcm283x-mmc-imp-speed.patch
new file mode 100644
index 000000000..bad003a3c
--- /dev/null
+++ b/bcm283x-mmc-imp-speed.patch
@@ -0,0 +1,107 @@
+From patchwork Fri Dec 30 15:24:32 2016
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [1/2] mmc: sdhci-iproc: Apply caps from bcm2835-mmc driver
+From: Stefan Wahren <stefan.wahren@i2se.com>
+X-Patchwork-Id: 9492281
+Message-Id: <1483111474-29907-2-git-send-email-stefan.wahren@i2se.com>
+To: Eric Anholt <eric@anholt.net>, Gerd Hoffmann <kraxel@redhat.com>,
+ Adrian Hunter <adrian.hunter@intel.com>,
+ Ulf Hansson <ulf.hansson@linaro.org>
+Cc: Stefan Wahren <stefan.wahren@i2se.com>,
+ Scott Branden <sbranden@broadcom.com>, Jon Mason <jonmason@broadcom.com>, 
+ Ray Jui <rjui@broadcom.com>, linux-mmc@vger.kernel.org,
+ bcm-kernel-feedback-list@broadcom.com,
+ linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org
+Date: Fri, 30 Dec 2016 15:24:32 +0000
+
+Since the mmc module on bcm2835 neither provide a capabilities register nor 
+free documentation we must rely on the downstream implementation [1].
+
+So enable the following capabilities for bcm2835:
+
+MMC_CAP_MMC_HIGHSPEED
+MMC_CAP_SD_HIGHSPEED
+MMC_CAP_DRIVER_TYPE_A
+MMC_CAP_DRIVER_TYPE_C
+
+[1] - https://github.com/raspberrypi/linux/blob/rpi-4.4.y/drivers/mmc/host/bcm2835-mmc.c
+
+Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
+Reviewed-by: Eric Anholt <eric@anholt.net>
+Acked-by: Adrian Hunter <adrian.hunter@intel.com>
+---
+ drivers/mmc/host/sdhci-iproc.c |    9 ++++++---
+ 1 file changed, 6 insertions(+), 3 deletions(-)
+
+diff --git a/drivers/mmc/host/sdhci-iproc.c b/drivers/mmc/host/sdhci-iproc.c
+index d7046d6..30b3fdf 100644
+--- a/drivers/mmc/host/sdhci-iproc.c
++++ b/drivers/mmc/host/sdhci-iproc.c
+@@ -211,14 +211,17 @@ static void sdhci_iproc_writeb(struct sdhci_host *host, u8 val, int reg)
+ static const struct sdhci_pltfm_data sdhci_bcm2835_pltfm_data = {
+ 	.quirks = SDHCI_QUIRK_BROKEN_CARD_DETECTION |
+ 		  SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
+-		  SDHCI_QUIRK_MISSING_CAPS,
++		  SDHCI_QUIRK_MISSING_CAPS |
++		  SDHCI_QUIRK_NO_HISPD_BIT,
+ 	.ops = &sdhci_iproc_32only_ops,
+ };
+ 
+ static const struct sdhci_iproc_data bcm2835_data = {
+ 	.pdata = &sdhci_bcm2835_pltfm_data,
+-	.caps = SDHCI_CAN_VDD_330,
+-	.caps1 = 0x00000000,
++	.caps = SDHCI_CAN_VDD_330 |
++		SDHCI_CAN_DO_HISPD,
++	.caps1 = SDHCI_DRIVER_TYPE_A |
++		 SDHCI_DRIVER_TYPE_C,
+ 	.mmc_caps = 0x00000000,
+ };
+ 
+From patchwork Fri Dec 30 15:24:33 2016
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: [2/2] mmc: sdhci-iproc: Increase max_blk_size for bcm2835
+From: Stefan Wahren <stefan.wahren@i2se.com>
+X-Patchwork-Id: 9492273
+Message-Id: <1483111474-29907-3-git-send-email-stefan.wahren@i2se.com>
+To: Eric Anholt <eric@anholt.net>, Gerd Hoffmann <kraxel@redhat.com>,
+ Adrian Hunter <adrian.hunter@intel.com>,
+ Ulf Hansson <ulf.hansson@linaro.org>
+Cc: Stefan Wahren <stefan.wahren@i2se.com>,
+ Scott Branden <sbranden@broadcom.com>, Jon Mason <jonmason@broadcom.com>, 
+ Ray Jui <rjui@broadcom.com>, linux-mmc@vger.kernel.org,
+ bcm-kernel-feedback-list@broadcom.com,
+ linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org
+Date: Fri, 30 Dec 2016 15:24:33 +0000
+
+According to the BCM2835 datasheet the maximum block size for the
+eMMC module is restricted to the internal data FIFO which is 1024 byte.
+But this is still an improvement to the default of 512 byte.
+
+Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
+Reviewed-by: Eric Anholt <eric@anholt.net>
+Acked-by: Scott Branden <scott.branden@broadcom.com>
+Acked-by: Adrian Hunter <adrian.hunter@intel.com>
+---
+ drivers/mmc/host/sdhci-iproc.c |    4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/mmc/host/sdhci-iproc.c b/drivers/mmc/host/sdhci-iproc.c
+index 30b3fdf..3275d49 100644
+--- a/drivers/mmc/host/sdhci-iproc.c
++++ b/drivers/mmc/host/sdhci-iproc.c
+@@ -218,7 +218,9 @@ static void sdhci_iproc_writeb(struct sdhci_host *host, u8 val, int reg)
+ 
+ static const struct sdhci_iproc_data bcm2835_data = {
+ 	.pdata = &sdhci_bcm2835_pltfm_data,
+-	.caps = SDHCI_CAN_VDD_330 |
++	.caps = ((0x1 << SDHCI_MAX_BLOCK_SHIFT)
++			& SDHCI_MAX_BLOCK_MASK) |
++		SDHCI_CAN_VDD_330 |
+ 		SDHCI_CAN_DO_HISPD,
+ 	.caps1 = SDHCI_DRIVER_TYPE_A |
+ 		 SDHCI_DRIVER_TYPE_C,