Hi Lucas,
On 22/12/15 18:40, Lucas Stach wrote:
> Hi all,
>
> this series implements UHS-I signaling for the Tegra SDHCI host,
> which mainly means putting a proper tuning sequence in place.
>
> I've tested this on Jetson TK1 and got the following speed results,
> where mmcblk0 is the on-board eMMC and mmcblk1 is a micro SDXC card:
>
> Without series applied:
> hdparm -t /dev/mmcblk0
> Timing buffered disk reads: 110 MB in 3.05 seconds = 36.02 MB/sec
> hdparm -t /dev/mmcblk1
> Timing buffered disk reads: 56 MB in 3.01 seconds = 18.63 MB/sec
>
> With series applied:
> hdparm -t /dev/mmcblk0
> Timing buffered disk reads: 236 MB in 3.00 seconds = 78.58 MB/sec
> hdparm -t /dev/mmcblk1
> Timing buffered disk reads: 102 MB in 3.04 seconds = 33.51 MB/sec
>
> Tegra 30 does support UHS-I speeds too, but currently has problems
> when lowering the card voltage, which is needed in order to switch
> to UHS-I signaling. I have some more patches to fix this, but they
> need a bit more cleanup, with them applied the gains on Tegra30 are
> similar to the results above.
>
> For now the gains are limited to Tegra124+, with no regressions on
> Tegra30 and Tegra20.
>
> V2 fixes some minor style problems and is rebased on top of mmc/next.
> This means it enables the same tuning logic on Tegra210 also. I
> don't have a way to test this myself, so any testing on Tegra210 much
> appreciated.
I have recently noticed that on my tegra114-dalmore-a04, SD cards are no
longer recognised on boot. It appears that the problem started after
this series was merged.
On tegra114 I see:
[ 1.777006] mmc0: error -110 whilst initialising SD card
If I disable the UHS-I changes then it works again (see below). I am
guessing you don't have a tegra114 board to test on? I have not had time
to look into this further, but I am not sure if we should disable UHS-I
on tegra114 for now?
Cheers
Jon
diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
index 83c4bf7bc16c..bc7a0847e316 100644
--- a/drivers/mmc/host/sdhci-tegra.c
+++ b/drivers/mmc/host/sdhci-tegra.c
@@ -147,10 +147,16 @@ static void tegra_sdhci_reset(struct sdhci_host
*host, u8 mask)
/* Advertise UHS modes as supported by host */
if (soc_data->nvquirks & NVQUIRK_ENABLE_SDR50)
misc_ctrl |= SDHCI_MISC_CTRL_ENABLE_SDR50;
+ else
+ misc_ctrl &= ~SDHCI_MISC_CTRL_ENABLE_SDR50;
if (soc_data->nvquirks & NVQUIRK_ENABLE_DDR50)
misc_ctrl |= SDHCI_MISC_CTRL_ENABLE_DDR50;
+ else
+ misc_ctrl &= ~SDHCI_MISC_CTRL_ENABLE_DDR50;
if (soc_data->nvquirks & NVQUIRK_ENABLE_SDR104)
misc_ctrl |= SDHCI_MISC_CTRL_ENABLE_SDR104;
+ else
+ misc_ctrl &= ~SDHCI_MISC_CTRL_ENABLE_SDR104;
sdhci_writel(host, misc_ctrl, SDHCI_TEGRA_VENDOR_MISC_CTRL);
clk_ctrl = sdhci_readl(host, SDHCI_TEGRA_VENDOR_CLOCK_CTRL);
@@ -315,6 +321,32 @@ static const struct sdhci_ops tegra114_sdhci_ops = {
.write_w = tegra_sdhci_writew,
.write_l = tegra_sdhci_writel,
.set_clock = tegra_sdhci_set_clock,
+ .set_bus_width = sdhci_set_bus_width,
+ .reset = tegra_sdhci_reset,
+ .set_uhs_signaling = sdhci_set_uhs_signaling,
+ .get_max_clock = sdhci_pltfm_clk_get_max_clock,
+};
+
+static const struct sdhci_pltfm_data sdhci_tegra114_pdata = {
+ .quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
+ SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
+ SDHCI_QUIRK_SINGLE_POWER_WRITE |
+ SDHCI_QUIRK_NO_HISPD_BIT |
+ SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC |
+ SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
+ .ops = &tegra114_sdhci_ops,
+};
+
+static const struct sdhci_tegra_soc_data soc_data_tegra114 = {
+ .pdata = &sdhci_tegra114_pdata,
+};
+
+static const struct sdhci_ops tegra124_sdhci_ops = {
+ .get_ro = tegra_sdhci_get_ro,
+ .read_w = tegra_sdhci_readw,
+ .write_w = tegra_sdhci_writew,
+ .write_l = tegra_sdhci_writel,
+ .set_clock = tegra_sdhci_set_clock,
.set_bus_width = tegra_sdhci_set_bus_width,
.reset = tegra_sdhci_reset,
.platform_execute_tuning = tegra_sdhci_execute_tuning,
@@ -322,7 +354,7 @@ static const struct sdhci_ops tegra114_sdhci_ops = {
.get_max_clock = tegra_sdhci_get_max_clock,
};
-static const struct sdhci_pltfm_data sdhci_tegra114_pdata = {
+static const struct sdhci_pltfm_data sdhci_tegra124_pdata = {
.quirks = SDHCI_QUIRK_BROKEN_TIMEOUT_VAL |
SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
SDHCI_QUIRK_SINGLE_POWER_WRITE |
@@ -330,11 +362,11 @@ static const struct sdhci_pltfm_data
sdhci_tegra114_pdata = {
SDHCI_QUIRK_BROKEN_ADMA_ZEROLEN_DESC |
SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN,
.quirks2 = SDHCI_QUIRK2_PRESET_VALUE_BROKEN,
- .ops = &tegra114_sdhci_ops,
+ .ops = &tegra124_sdhci_ops,
--
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