linux-kernel - Re: [PATCH V9 00/23] Add support UHS-II for GL9755

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Date:   Mon, 31 Jul 2023 18:29:19 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Victor Shih <victorshihgli@...il.com>, ulf.hansson@...aro.org
Cc:     linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        benchuanggli@...il.com, HL.Liu@...esyslogic.com.tw,
        Greg.tu@...esyslogic.com.tw, takahiro.akashi@...aro.org,
        dlunev@...omium.org, Victor Shih <victor.shih@...esyslogic.com.tw>
Subject: Re: [PATCH V9 00/23] Add support UHS-II for GL9755

On 21/07/23 13:13, Victor Shih wrote:
> From: Victor Shih <victor.shih@...esyslogic.com.tw>
> 
> Summary
> =======
> These patches[1] support UHS-II and fix GL9755 UHS-II compatibility.
> 
> About UHS-II, roughly deal with the following three parts:
> 1) A UHS-II detection and initialization:
> - Host setup to support UHS-II (Section 3.13.1 Host Controller Setup
>   Sequence[2]).
> - Detect a UHS-II I/F (Section 3.13.2 Card Interface Detection Sequence
>   [2]).
> - In step(9) of Section 3.13.2 in [2], UHS-II initialization is include
>   Section 3.13.3 UHS-II Card Initialization and Section 3.13.4 UHS-II
>   Setting Register Setup Sequence.
> 
> 2) Send Legacy SD command through SD-TRAN
> - Encapsulated SD packets are defined in SD-TRAN in order to ensure Legacy
>   SD compatibility and preserve Legacy SD infrastructures (Section 7.1.1
>   Packet Types and Format Overview[3]).
> - Host issue a UHS-II CCMD packet or a UHS-II DCMD (Section 3.13.5 UHS-II
>   CCMD Packet issuing and Section 3.13.6 UHS-II DCMD Packet issuing[2]).
> 
> 3) UHS-II Interrupt
> - Except for UHS-II error interrupts, most interrupts share the original
>   interrupt registers.
> 
> Patch structure
> ===============
> patch#1-#6:  for core
> patch#7-#22: for sdhci
> patch#23:    for GL9755
> 
> Changes in v9 (July. 21, 2023)
> * rebased to the linux-kernel-v6.5.0-rc1 in Ulf Hansson next branch.
> * according to the comments provided by Adrian Hunter to modify the
>   patches base on the [V8 00/23] Add support UHS-II for GL9755.
> * Patch#2: move sd_uhs2_operation definition of PatchV8[05/23]
>            to PatchV9[02/23] for avoid compilation errors.
>            move uhs2_control definition of PatchV8[05/23]
>            to PatchV9[02/23] for avoid compilation errors.
>            move mmc_host flags definition of PatchV8[05/23]
>            to PatchV9[02/23] for avoid compilation errors.
>            move mmc_host flags MMC_UHS2_SUPPORT definition of
>            PatchV8[05/23] to PatchV9[02/23] for avoid compilation errors.
>            move mmc_host flags MMC_UHS2_SD_TRAN definition of
>            PatchV8[05/23] to PatchV9[02/23] for avoid compilation errors.
> * Patch#7: Modify the commit message.
> * Patch#8: Modify the commit message.
> * Patch#11: Modify annotations in sdhci_get_vdd_value().
> * Patch#14: Simplity the turning_on_clk in sdhci_set_ios().
> * Patch#18: Modify the annotations in __sdhci_uhs2_send_command().
> * Patch#19: Cancel export state of sdhci_set_mrq_done() function.
> * Patch#23: Rename gl9755_pre_detect_init() to sdhci_gli_pre_detect_init().
>             Rename gl9755_uhs2_reset_sd_tran() to
>             sdhci_gli_uhs2_reset_sd_tran().
> 
> Reference
> =========
> [1] https://gitlab.com/VictorShih/linux-uhs2.git
> [2] SD Host Controller Simplified Specification 4.20
> [3] UHS-II Simplified Addendum 1.02
> [4] https://patchwork.kernel.org/project/linux-mmc/cover/20230621100151.6329-1-victorshihgli@gmail.com/
> 
> ----------------- original cover letter from v8 -----------------
> Summary
> =======
> These patches[1] support UHS-II and fix GL9755 UHS-II compatibility.
> 
> About UHS-II, roughly deal with the following three parts:
> 1) A UHS-II detection and initialization:
> - Host setup to support UHS-II (Section 3.13.1 Host Controller Setup
>   Sequence[2]).
> - Detect a UHS-II I/F (Section 3.13.2 Card Interface Detection Sequence
>   [2]).
> - In step(9) of Section 3.13.2 in [2], UHS-II initialization is include
>   Section 3.13.3 UHS-II Card Initialization and Section 3.13.4 UHS-II
>   Setting Register Setup Sequence.
> 
> 2) Send Legacy SD command through SD-TRAN
> - Encapsulated SD packets are defined in SD-TRAN in order to ensure Legacy
>   SD compatibility and preserve Legacy SD infrastructures (Section 7.1.1
>   Packet Types and Format Overview[3]).
> - Host issue a UHS-II CCMD packet or a UHS-II DCMD (Section 3.13.5 UHS-II
>   CCMD Packet issuing and Section 3.13.6 UHS-II DCMD Packet issuing[2]).
> 
> 3) UHS-II Interrupt
> - Except for UHS-II error interrupts, most interrupts share the original
>   interrupt registers.
> 
> Patch structure
> ===============
> patch#1-#6:  for core
> patch#7-#22: for sdhci
> patch#23:    for GL9755
> 
> Changes in v8 (June. 21, 2023)
> * rebased to the linux-kernel-v6.4.0-rc6 in Ulf Hansson next branch.
> * fix most of checkpatch warnings/errors.
> * according to the comments provided by Adrian Hunter to modify the
>   patches base on the [V7 00/23] Add support UHS-II for GL9755.
> * Patch#6: Add MMC_UHS2_SUPPORT to be cleared in sd_uhs2_detect().
>            Modify return value in sd_uhs2_attach().
> * Patch#7: Use tabs instead of spaces.
> * Patch#8: Modify MODULE_LICENSE from "GPL v2" to "GPL".
> * Patch#10: Adjust the position of matching brackets.
> * Patch#11: Adjust the position of matching brackets.
>             Add the initial value of the pwr in sdhci_uhs2_set_power().
> * Patch#13: Initialization be combined with declaration and realigned
>             in sdhci_calc_timeout_uhs2().
>             Forward declare struct mmc_command in sdhci_uhs2.h.
> * Patch#14: Add the judgment formula for MMC_TIMING_SPEED_A_HD,
>             MMC_TIMING_SPEED_B and MMC_TIMING_SPEED_B_HD in
>             __sdhci_uhs2_set_ios().
>             Add the switch case for MMC_TIMING_SPEED_A_HD,
>             MMC_TIMING_SPEED_B and MMC_TIMING_SPEED_B_HD in
>             sdhci_get_preset_value().
>             mmc_opt_regulator_set_ocr() to instead of
>             mmc_regulator_set_ocr() in sdhci_uhs2_set_ios().
> * Patch#15: usleep_range() to instead of udelay() in
>             sdhci_uhs2_interface_detect().
>             read_poll_timeout() to instead of read_poll_timeout_atomic()
>             in sdhci_uhs2_interface_detect().
>             Modify return value in sdhci_uhs2_do_detect_init().
> * Patch#16: Remove unnecessary include file.
>             read_poll_timeout() to instead of read_poll_timeout_atomic()
>             in sdhci_uhs2_enable_clk().
>             Put the comment on the end and put the lines in descending
>             line length in sdhci_uhs2_enable_clk().
>             Modify return value in sdhci_uhs2_enable_clk().
> * Patch#17: Reorder the definitions and lose the parentheses in
>             sdhci_uhs2_set_config().
>             read_poll_timeout() to instead of read_poll_timeout_atomic()
>             in sdhci_uhs2_check_dormant().
> * Patch#18: Adjust the position of matching brackets in
>             sdhci_uhs2_send_command_retry().
>             Modify CameCase definition in __sdhci_uhs2_finish_command().
>             Modify error message in __sdhci_uhs2_finish_command().
>             sdhci_uhs2_send_command_retry() to instead of
>             sdhci_uhs2_send_command() in sdhci_uhs2_request().
>             Use sdhci_uhs2_mode() to simplify code in
>             sdhci_uhs2_request_atomic().
>             Add forward declaration for sdhci_send_command().
> * Patch#19: Forward declare struct mmc_request in sdhci_uhs2.h.
>             Remove forward declaration of sdhci_send_command().
>             Use mmc_dev() to simplify code in sdhci_request_done_dma().
> * Patch#20: Change return type to void for __sdhci_uhs2_add_host_v4().
>             Remove unused variables in __sdhci_uhs2_add_host_v4().
> * Patch#22: Add config select MMC_SDHCI_UHS2 in Kconfig.
> * Patch#23: Use sdhci_get_vdd_value() to simplify code in 
>             gl9755_set_power().
>             Use read_poll_timeout_atomic() to simplify code in
>             sdhci_wait_clock_stable().
>             Use read_poll_timeout_atomic() to simplify code in
>             sdhci_gl9755_reset().
> 
> Reference
> =========
> [1] https://gitlab.com/VictorShih/linux-uhs2.git
> [2] SD Host Controller Simplified Specification 4.20
> [3] UHS-II Simplified Addendum 1.02
> [4] https://patchwork.kernel.org/project/linux-mmc/cover/20230331105546.13607-1-victor.shih@genesyslogic.com.tw/
> 
> ----------------- original cover letter from v7 -----------------
> Summary
> =======
> These patches[1] support UHS-II and fix GL9755 UHS-II compatibility.
> 
> About UHS-II, roughly deal with the following three parts:
> 1) A UHS-II detection and initialization:
> - Host setup to support UHS-II (Section 3.13.1 Host Controller Setup Sequence
>   [2]).
> - Detect a UHS-II I/F (Section 3.13.2 Card Interface Detection Sequence[2]).
> - In step(9) of Section 3.13.2 in [2], UHS-II initialization is include Section
>   3.13.3 UHS-II Card Initialization and Section 3.13.4 UHS-II Setting Register
>   Setup Sequence.
> 
> 2) Send Legacy SD command through SD-TRAN
> - Encapsulated SD packets are defined in SD-TRAN in order to ensure Legacy SD
>   compatibility and preserve Legacy SD infrastructures (Section 7.1.1 Packet
>   Types and Format Overview[3]).
> - Host issue a UHS-II CCMD packet or a UHS-II DCMD (Section 3.13.5 UHS-II
>   CCMD Packet issuing and Section 3.13.6 UHS-II DCMD Packet issuing[2]).
> 
> 3) UHS-II Interrupt
> - Except for UHS-II error interrupts, most interrupts share the original
>   interrupt registers.
> 
> Patch structure
> ===============
> patch#1-#6:  for core
> patch#7-#22: for sdhci
> patch#23:    for GL9755

For patches 7 - 23:

Acked-by: Adrian Hunter <adrian.hunter@...el.com>