From: Sean Anderson <seanga2@gmail.com> To: "Wladimir J. van der Laan" <laanwj@gmail.com>, Carlos Eduardo de Paula <me@carlosedp.com> Cc: Damien Le Moal <Damien.LeMoal@wdc.com>, Anup Patel <Anup.Patel@wdc.com>, Palmer Dabbelt <palmer@dabbelt.com>, "linux-riscv@lists.infradead.org" <linux-riscv@lists.infradead.org>, Paul Walmsley <paul.walmsley@sifive.com> Subject: Re: [PATCH 08/10] riscv: Add Kendryte K210 device tree Date: Wed, 19 Feb 2020 17:28:04 -0500 Message-ID: <cabd9527-3df3-4e5a-4669-5c14ed44e94d@gmail.com> (raw) In-Reply-To: <20200219090612.7onbaoygy6waumnw@aurora.visucore.com> On 2/19/20 4:06 AM, Wladimir J. van der Laan wrote: > On Tue, Feb 18, 2020 at 04:26:17PM -0300, Carlos Eduardo de Paula wrote: >> On Tue, Feb 18, 2020 at 2:48 PM Sean Anderson <seanga2@gmail.com> wrote: >>> >>> So the LCD connector is supposed to be for a ST7789V controller, but >>> there doesn't appear to be a driver in Linux for it. I don't have an >>> appropriate LCD screen, so I will not be able to write a driver. >>> >> >> Actually there is a driver and config DRM_PANEL_SITRONIX_ST7789V, in >> gpu/drm/panel/panel-sitronix-st7789v.c and also FB_TFT_ST7789V and >> CONFIG_FB_TFT_ST7789V with the driver a in >> staging/fbtft/fb_st7789v.c. Might be easier :) Ah, I didn't notice that, thanks. >> >> Weird that the Kendryte SDK refers to the LCD as NT35310 >> (https://github.com/kendryte/kendryte-standalone-demo/tree/develop/lcd). > > I remember checking the datasheet for both a while ago and NT35310 and ST7789V > seem to be more or less compatible, with only register differences > for more obscure functionality. > > The more involved part is likely to adapt the spi-dw driver, apart from making the > ctrlr0 shifts configurable, there's the "OCTAL" mode that is used and extra > register that isn't set in the Linux driver (spi_ctrlr0 / 0xf4) concerning > "instruction address translation mode" and other things that needs to > be set correctly for LCD transfers to work. > >>> There is no need for GPIOs. The datasheet shows SPI0 as hooked up to the >>> SD card, but the default pinconf doesn't have it hooked up. In addition, >>> the dedicated SPI0 data lines are already connected to the LCD. For > > Yes - apparently only if you set sysctl spi_dvp_data_enable to route the > SPI0_0-7 pins to to the LCD data pins (bypassing FPIOA). > > BTW speaking of which, does anyone know what's up with the K210's DMA > controller? It looks like it can only transfer 32-bit values from and to > peripherals? At least the kendryte-standalone-sdk goes to great lengths to > first allocate a 32-bit buffer then manually copy it to say, bytes or 16-bit > words. Seems quite a silly workaround with a lot of overhead. Do you have a link to that section? --Sean
next prev parent reply index Thread overview: 89+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-02-12 10:34 [PATCH 00/10] Kendryte k210 SoC boards support Damien Le Moal 2020-02-12 10:34 ` [PATCH 01/10] riscv: Fix gitignore Damien Le Moal 2020-02-20 0:15 ` Palmer Dabbelt 2020-02-12 10:34 ` [PATCH 02/10] riscv: Force flat memory model with no-mmu Damien Le Moal 2020-02-14 20:18 ` Sean Anderson 2020-02-15 2:15 ` Damien Le Moal 2020-02-15 2:26 ` Sean Anderson 2020-02-15 2:40 ` Damien Le Moal 2020-03-02 3:48 ` Anup Patel 2020-03-04 18:38 ` Palmer Dabbelt 2020-02-12 10:34 ` [PATCH 03/10] riscv: Unaligned load/store handling for M_MODE Damien Le Moal 2020-03-02 3:57 ` Anup Patel 2020-03-04 19:28 ` Palmer Dabbelt 2020-02-12 10:34 ` [PATCH 04/10] riscv: Add BUILTIN_DTB support Damien Le Moal 2020-03-02 3:58 ` Anup Patel 2020-03-04 19:28 ` Palmer Dabbelt 2020-03-05 4:58 ` Anup Patel 2020-03-05 5:14 ` Damien Le Moal 2020-03-05 5:37 ` Anup Patel 2020-03-05 6:13 ` Damien Le Moal 2020-03-08 6:10 ` Anup Patel 2020-03-05 8:18 ` Atish Patra 2020-03-07 0:02 ` Sean Anderson 2020-03-07 1:51 ` Atish Patra 2020-03-07 2:08 ` Sean Anderson 2020-03-06 23:56 ` Sean Anderson 2020-02-12 10:34 ` [PATCH 05/10] riscv: Add SOC early init support Damien Le Moal 2020-03-04 19:28 ` Palmer Dabbelt 2020-02-12 10:34 ` [PATCH 06/10] riscv: Add Kendryte K210 SoC support Damien Le Moal 2020-02-14 20:31 ` Sean Anderson 2020-03-04 19:38 ` Palmer Dabbelt 2020-02-12 10:34 ` [PATCH 07/10] riscv: Select required drivers for Kendryte SOC Damien Le Moal 2020-03-02 3:59 ` Anup Patel 2020-03-04 19:44 ` Palmer Dabbelt 2020-02-12 10:34 ` [PATCH 08/10] riscv: Add Kendryte K210 device tree Damien Le Moal 2020-02-14 20:51 ` Sean Anderson 2020-02-15 2:34 ` Damien Le Moal 2020-02-15 2:48 ` Sean Anderson 2020-02-15 3:00 ` Damien Le Moal 2020-02-18 14:12 ` Carlos Eduardo de Paula 2020-02-18 14:18 ` Sean Anderson 2020-02-18 14:30 ` Carlos Eduardo de Paula 2020-02-18 17:48 ` Sean Anderson 2020-02-18 19:26 ` Carlos Eduardo de Paula 2020-02-19 9:06 ` Wladimir J. van der Laan 2020-02-19 22:28 ` Sean Anderson [this message] 2020-02-20 10:48 ` Wladimir J. van der Laan 2020-02-22 19:07 ` Wladimir J. van der Laan 2020-04-01 17:55 ` Drew Fustini 2020-04-02 2:24 ` Damien Le Moal 2020-02-19 8:50 ` Wladimir J. van der Laan 2020-02-27 19:43 ` Sean Anderson 2020-03-02 4:06 ` Anup Patel 2020-03-02 4:15 ` Damien Le Moal 2020-03-02 4:22 ` Anup Patel 2020-03-02 4:51 ` Damien Le Moal 2020-03-02 5:05 ` Anup Patel 2020-03-02 5:08 ` Damien Le Moal 2020-03-07 0:18 ` Sean Anderson 2020-03-07 4:11 ` Anup Patel 2020-03-04 19:44 ` Palmer Dabbelt 2020-02-12 10:34 ` [PATCH 09/10] riscv: Kendryte K210 default config Damien Le Moal 2020-03-02 4:07 ` Anup Patel 2020-03-04 19:44 ` Palmer Dabbelt 2020-02-12 10:34 ` [PATCH 10/10] riscv: create a loader.bin for the kendryte kflash.py tool Damien Le Moal 2020-03-02 4:08 ` Anup Patel 2020-03-04 19:44 ` Palmer Dabbelt 2020-02-14 15:05 ` [PATCH 00/10] Kendryte k210 SoC boards support Carlos Eduardo de Paula 2020-02-15 2:02 ` Damien Le Moal 2020-02-17 13:28 ` Carlos Eduardo de Paula 2020-02-26 21:31 ` Carlos Eduardo de Paula 2020-02-27 2:18 ` Damien Le Moal 2020-02-28 20:32 ` Sean Anderson 2020-03-02 3:01 ` Damien Le Moal 2020-03-02 3:53 ` Sean Anderson 2020-03-02 4:11 ` Damien Le Moal 2020-03-02 4:18 ` Sean Anderson 2020-03-02 4:54 ` Damien Le Moal 2020-03-02 4:56 ` Sean Anderson 2020-03-02 5:03 ` Damien Le Moal 2020-03-02 4:17 ` Anup Patel 2020-03-02 4:21 ` Sean Anderson 2020-03-02 4:48 ` Damien Le Moal 2020-03-02 4:51 ` Damien Le Moal 2020-03-02 5:02 ` Sean Anderson 2020-03-02 5:11 ` Damien Le Moal 2020-03-02 5:25 ` Sean Anderson 2020-03-02 5:43 ` Damien Le Moal 2020-03-04 19:44 ` Palmer Dabbelt
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