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Message-ID: <CAHwB_NKuhPzH-0qPDgXnjr-giKmDu3kP9-nLpiS8+f7XrHZoFA@mail.gmail.com>
Date: Thu, 6 Jul 2023 17:13:12 +0800
From: cong yang <yangcong5@...qin.corp-partner.google.com>
To: Linus Walleij <linus.walleij@...aro.org>
Cc: Ruihai Zhou <zhouruihai@...qin.corp-partner.google.com>,
Stephen Boyd <swboyd@...omium.org>,
Douglas Anderson <dianders@...omium.org>,
Jitao Shi <jitao.shi@...iatek.com>,
Neil Armstrong <neil.armstrong@...aro.org>,
Sam Ravnborg <sam@...nborg.org>,
David Airlie <airlied@...il.com>,
Daniel Vetter <daniel@...ll.ch>,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
Hsin-Yi Wang <hsinyi@...gle.com>
Subject: Re: [PATCH v3 4/4] drm/panel: ili9882t: Break out function for
switching page
Hi,
On Mon, Jul 3, 2023 at 9:22 PM Linus Walleij <linus.walleij@...aro.org> wrote:
>
> The ILI9882t has similarities with other Ilitek panels, such
> as the characteristic internal page switching code that uses
> the model number (0x98, 0x82) as parameter.
>
> We can clearly abstract out the page switching sequence from
> the initialization code.
>
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
> ---
> drivers/gpu/drm/panel/panel-ilitek-ili9882t.c | 54 ++++++++++++++++++---------
> 1 file changed, 37 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c b/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c
> index 20f3cc37fa83..c1a0f10fbaf7 100644
> --- a/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c
> +++ b/drivers/gpu/drm/panel/panel-ilitek-ili9882t.c
> @@ -55,13 +55,33 @@ struct ili9882t {
> struct gpio_desc *enable_gpio;
> };
>
> +/* ILI9882-specific commands, add new commands as you decode them */
> +#define ILI9882T_DCS_SWITCH_PAGE 0xFF
> +
> +static int ili9882t_switch_page(struct mipi_dsi_device *dsi, u8 page)
> +{
> + u8 switch_cmd[] = {0x98, 0x82, 0x00};
> + int ret;
> +
> + switch_cmd[2] = page;
> +
> + ret = mipi_dsi_dcs_write(dsi, ILI9882T_DCS_SWITCH_PAGE, switch_cmd, 3);
> + if (ret) {
> + dev_err(&dsi->dev,
> + "error switching panel controller page (%d)\n", ret);
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> static int starry_ili9882t_init(struct mipi_dsi_device *dsi)
> {
> int ret;
>
> msleep(5);
>
> - mipi_dsi_dcs_write_seq(dsi, 0xFF, 0x98, 0x82, 0x01);
> + ili9882t_switch_page(dsi, 0x01);
> mipi_dsi_dcs_write_seq(dsi, 0x00, 0x42);
> mipi_dsi_dcs_write_seq(dsi, 0x01, 0x11);
> mipi_dsi_dcs_write_seq(dsi, 0x02, 0x00);
> @@ -192,7 +212,7 @@ static int starry_ili9882t_init(struct mipi_dsi_device *dsi)
> mipi_dsi_dcs_write_seq(dsi, 0x8B, 0x07);
> mipi_dsi_dcs_write_seq(dsi, 0x8C, 0x07);
>
> - mipi_dsi_dcs_write_seq(dsi, 0xFF, 0x98, 0x82, 0x02);
> + ili9882t_switch_page(dsi, 0x02);
> mipi_dsi_dcs_write_seq(dsi, 0x29, 0x3A);
> mipi_dsi_dcs_write_seq(dsi, 0x2A, 0x3B);
>
> @@ -211,12 +231,12 @@ static int starry_ili9882t_init(struct mipi_dsi_device *dsi)
> mipi_dsi_dcs_write_seq(dsi, 0x5E, 0x40);
> mipi_dsi_dcs_write_seq(dsi, 0x84, 0x00);
>
> - mipi_dsi_dcs_write_seq(dsi, 0xFF, 0x98, 0x82, 0x03);
> + ili9882t_switch_page(dsi, 0x03);
> mipi_dsi_dcs_write_seq(dsi, 0x20, 0x01);
> mipi_dsi_dcs_write_seq(dsi, 0x21, 0x3C);
> mipi_dsi_dcs_write_seq(dsi, 0x22, 0xFA);
>
> - mipi_dsi_dcs_write_seq(dsi, 0xFF, 0x98, 0x82, 0x0A);
> + ili9882t_switch_page(dsi, 0x0a);
> mipi_dsi_dcs_write_seq(dsi, 0xE0, 0x01);
> mipi_dsi_dcs_write_seq(dsi, 0xE2, 0x01);
> mipi_dsi_dcs_write_seq(dsi, 0xE5, 0x91);
> @@ -224,10 +244,10 @@ static int starry_ili9882t_init(struct mipi_dsi_device *dsi)
> mipi_dsi_dcs_write_seq(dsi, 0xE7, 0x00);
> mipi_dsi_dcs_write_seq(dsi, 0xE8, 0xFA);
>
> - mipi_dsi_dcs_write_seq(dsi, 0xFF, 0x98, 0x82, 0x12);
> + ili9882t_switch_page(dsi, 0x12);
> mipi_dsi_dcs_write_seq(dsi, 0x87, 0x2C);
>
> - mipi_dsi_dcs_write_seq(dsi, 0xFF, 0x98, 0x82, 0x05);
> + ili9882t_switch_page(dsi, 0x05);
> mipi_dsi_dcs_write_seq(dsi, 0x73, 0xE5);
> mipi_dsi_dcs_write_seq(dsi, 0x7F, 0x6B);
> mipi_dsi_dcs_write_seq(dsi, 0x6D, 0xA4);
> @@ -242,7 +262,7 @@ static int starry_ili9882t_init(struct mipi_dsi_device *dsi)
> mipi_dsi_dcs_write_seq(dsi, 0x1D, 0x90);
> mipi_dsi_dcs_write_seq(dsi, 0x86, 0x87);
>
> - mipi_dsi_dcs_write_seq(dsi, 0xFF, 0x98, 0x82, 0x06);
> + ili9882t_switch_page(dsi, 0x06);
> mipi_dsi_dcs_write_seq(dsi, 0xC0, 0x80);
> mipi_dsi_dcs_write_seq(dsi, 0xC1, 0x07);
> mipi_dsi_dcs_write_seq(dsi, 0xCA, 0x58);
> @@ -256,7 +276,7 @@ static int starry_ili9882t_init(struct mipi_dsi_device *dsi)
> mipi_dsi_dcs_write_seq(dsi, 0xD6, 0x55);
> mipi_dsi_dcs_write_seq(dsi, 0xDC, 0x38);
>
> - mipi_dsi_dcs_write_seq(dsi, 0xFF, 0x98, 0x82, 0x08);
> + ili9882t_switch_page(dsi, 0x08);
> mipi_dsi_dcs_write_seq(dsi, 0xE0, 0x00, 0x10, 0x2A, 0x4D, 0x61, 0x56, 0x6A, 0x6E, 0x79,
> 0x76, 0x8F, 0x95, 0x98, 0xAE, 0xAA, 0xB2, 0xBB, 0xCE, 0xC6, 0xBD,
> 0xD5, 0xE2, 0xE8);
> @@ -264,10 +284,10 @@ static int starry_ili9882t_init(struct mipi_dsi_device *dsi)
> 0x76, 0x8F, 0x95, 0x98, 0xAE, 0xAA, 0xB2, 0xBB, 0xCE, 0xC6, 0xBD,
> 0xD5, 0xE2, 0xE8);
>
> - mipi_dsi_dcs_write_seq(dsi, 0xFF, 0x98, 0x82, 0x04);
> + ili9882t_switch_page(dsi, 0x04);
> mipi_dsi_dcs_write_seq(dsi, 0xBA, 0x81);
>
> - mipi_dsi_dcs_write_seq(dsi, 0xFF, 0x98, 0x82, 0x0C);
> + ili9882t_switch_page(dsi, 0x0c);
> mipi_dsi_dcs_write_seq(dsi, 0x00, 0x02);
> mipi_dsi_dcs_write_seq(dsi, 0x01, 0x00);
> mipi_dsi_dcs_write_seq(dsi, 0x02, 0x03);
> @@ -333,10 +353,10 @@ static int starry_ili9882t_init(struct mipi_dsi_device *dsi)
> mipi_dsi_dcs_write_seq(dsi, 0x3E, 0x0A);
> mipi_dsi_dcs_write_seq(dsi, 0x3F, 0x1F);
>
> - mipi_dsi_dcs_write_seq(dsi, 0xFF, 0x98, 0x82, 0x04);
> + ili9882t_switch_page(dsi, 0x04);
> mipi_dsi_dcs_write_seq(dsi, 0xBA, 0x01);
>
> - mipi_dsi_dcs_write_seq(dsi, 0xFF, 0x98, 0x82, 0x0E);
> + ili9882t_switch_page(dsi, 0x0e);
> mipi_dsi_dcs_write_seq(dsi, 0x02, 0x0C);
> mipi_dsi_dcs_write_seq(dsi, 0x20, 0x10);
> mipi_dsi_dcs_write_seq(dsi, 0x25, 0x16);
> @@ -373,12 +393,12 @@ static int starry_ili9882t_init(struct mipi_dsi_device *dsi)
> mipi_dsi_dcs_write_seq(dsi, 0x07, 0x21);
> mipi_dsi_dcs_write_seq(dsi, 0x04, 0x10);
>
> - mipi_dsi_dcs_write_seq(dsi, 0xFF, 0x98, 0x82, 0x1E);
> + ili9882t_switch_page(dsi, 0x1e);
> mipi_dsi_dcs_write_seq(dsi, 0x60, 0x00);
> mipi_dsi_dcs_write_seq(dsi, 0x64, 0x00);
> mipi_dsi_dcs_write_seq(dsi, 0x6D, 0x00);
>
> - mipi_dsi_dcs_write_seq(dsi, 0xFF, 0x98, 0x82, 0x0B);
> + ili9882t_switch_page(dsi, 0x0b);
> mipi_dsi_dcs_write_seq(dsi, 0xA6, 0x44);
> mipi_dsi_dcs_write_seq(dsi, 0xA7, 0xB6);
> mipi_dsi_dcs_write_seq(dsi, 0xA8, 0x03);
> @@ -389,13 +409,13 @@ static int starry_ili9882t_init(struct mipi_dsi_device *dsi)
> mipi_dsi_dcs_write_seq(dsi, 0xBD, 0x92);
> mipi_dsi_dcs_write_seq(dsi, 0xBE, 0xA1);
>
> - mipi_dsi_dcs_write_seq(dsi, 0xFF, 0x98, 0x82, 0x05);
> + ili9882t_switch_page(dsi, 0x05);
> mipi_dsi_dcs_write_seq(dsi, 0x86, 0x87);
>
> - mipi_dsi_dcs_write_seq(dsi, 0xFF, 0x98, 0x82, 0x06);
> + ili9882t_switch_page(dsi, 0x06);
> mipi_dsi_dcs_write_seq(dsi, 0x92, 0x22);
>
> - mipi_dsi_dcs_write_seq(dsi, 0xFF, 0x98, 0x82, 0x00);
> + ili9882t_switch_page(dsi, 0x00);
>
> ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
> if (ret)
>
> --
> 2.34.1
>
Tested-by: Cong Yang <yangcong5@...qin.corp-partner.google.com>
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