Driver perangkat linux timeout transaksi SPI

Saya terjebak selama 3 hari terakhir pada suatu titik.

Saya bekerja pada driver perangkat eink dengan chipset Qualcomm msm8960.

Scenario: Dalam file: kernel / arch / arm / mach-msm / devices-8960.c

Saya tidak dapat memverifikasi use of spidm_channels" and "spidm_crci"dan entri yang sesuai. (Msm8960 pro) (disalin dari beberapa kode referensi) Bagaimana cara memverifikasi jika nilai yang sesuai start and endsudah benar ?? Saya memiliki datasheet untuk msm tetapi tidak dapat menemukan referensi apa pun.

Saya telah menambahkan kode berikut untuk membuat sumber gsbi baru dalam file sebagai:

static struct resource resources_qup_spi_gsbi9[] = {
    {
            .name   = "spi_base",
            .start  = MSM_GSBI9_QUP_PHYS,
            .end    = MSM_GSBI9_QUP_PHYS + SZ_4K - 1,
            .flags  = IORESOURCE_MEM,
    },
    {
            .name   = "gsbi_base",
            .start  = MSM_GSBI9_PHYS,
            .end    = MSM_GSBI9_PHYS + 4 - 1,
            .flags  = IORESOURCE_MEM,
    },
    {
            .name   = "spi_irq_in",
            .start  = GSBI9_QUP_IRQ,
            .end    = GSBI9_QUP_IRQ,
            .flags  = IORESOURCE_IRQ,
    },
    {
             .name   = "spidm_channels",
            .start  = 3,
            .end    = 4,
            .flags  = IORESOURCE_DMA,
    },
    {
            .name   = "spidm_crci",
            .start  = 12,
            .end    = 13,
            .flags  = IORESOURCE_DMA,
    }, 
};

Alasan untuk memiliki keraguan ini adalah bahwa operasi DMA kami gagal dengan kesalahan: dari log:

<6>[    0.764932] wait_for_ready: I/F Ready.^M
<7>[    0.765176] s1d13522_ spi9.0: setup mode 0, 16 bits/w, 51200000 Hz max --> 0^M
<3>[    1.756630] spi_qsd spi_qsd.9: msm_spi_process_transfer: SPI transaction timeout^M

dan kemudian jika kita mencoba melakukan operasi DMA lain itu memberikan kesalahan berikut:

<3>[    6.773355] s1d13522if_cmd: wait_for_ready: I/F busy bit stuck^M
<7>[    6.775400] s1d13522_ spi9.0: setup mode 0, 16 bits/w, 51200000 Hz max --> 0^M
<4>[    6.775583] ------------[ cut here ]------------^M
<4>[    6.775614] WARNING: at /home/anshul_10605816/hip_mirror_2330_code/kernel        /lib/list_debug.c:32 __list_add+0x58/0x78()^M
<4>[    6.775644] list_add corruption. prev->next should be next (c0d5124c), but was 00100100. (prev=edf643b8).^M
<4>[    6.775675] Modules linked in:^M
<4>[    6.775766] [<c00149b8>] (unwind_backtrace+0x0/0x11c) from [<c007c818>] (warn_slowpath_common+0x4c/0x64)^M
<4>[    6.775827] [<c007c818>] (warn_slowpath_common+0x4c/0x64) from [<c007c8b0>] (warn_slowpath_fmt+0x2c/0x3c)^M
<4>[    6.775888] [<c007c8b0>] (warn_slowpath_fmt+0x2c/0x3c) from [<c02a9538>] (__list_add+0x58/0x78)^M
<4>[    6.775919] [<c02a9538>] (__list_add+0x58/0x78) from [<c001e3d4>] (start_ready_cmd+0x84/0x13c)^M
<4>[    6.775980] [<c001e3d4>] (start_ready_cmd+0x84/0x13c) from [<c001e704>] (msm_dmov_enqueue_cmd_ext_work+0x148/0x284)^M
<4>[    6.776041] [<c001e704>] (msm_dmov_enqueue_cmd_ext_work+0x148/0x284) from [<c0094e0c>] (process_one_work+0x27c/0x484)^M
<4>[    6.776072] [<c0094e0c>] (process_one_work+0x27c/0x484) from [<c0095224>] (worker_thread+0x210/0x3b0)^M
<4>[    6.776133] [<c0095224>] (worker_thread+0x210/0x3b0) from [<c00990c0>] (kthread+0x80/0x8c)^M
<4>[    6.776194] [<c00990c0>] (kthread+0x80/0x8c) from [<c000f108>] (kernel_thread_exit+0x0/0x8)^M
<4>[    6.776224] ---[ end trace da227214a82491b8 ]---^M
<3>[   11.766732] spi_qsd spi_qsd.9: msm_spi_process_transfer: SPI transaction timeout^M

Bantuan apa pun akan sangat dihargai.

Jika ada informasi kode lagi yang diperlukan, beri tahu saya.

spi driver linux Anshul
sumber

Driver perangkat linux timeout transaksi SPI

Jawaban: