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Message-ID: <CAOf5uwn6jv_J3BMDyqUzh=7wc8oSJrGC7nv8WtnOR91cdhJ2Vg@mail.gmail.com>
Date: Sat, 16 Oct 2021 10:14:21 +0200
From: Michael Nazzareno Trimarchi <michael@...rulasolutions.com>
To: Sam Ravnborg <sam@...nborg.org>
Cc: Thierry Reding <thierry.reding@...il.com>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
dri-devel <dri-devel@...ts.freedesktop.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] drm/panel: ilitek-ili9881d: add support for
Wanchanglong W552946ABA panel
Hi
On Fri, Oct 15, 2021 at 9:15 PM Sam Ravnborg <sam@...nborg.org> wrote:
>
> Hi Michael,
>
> > Add this panel's initialzation sequence and timing to ILI9881D driver.
> > Tested on px30-evb v11
> Patch looks good, but we need the vendor and the compatible documented.
>
> >
> > Signed-off-by: Michael Trimarchi <michael@...rulasolutions.com>
> > ---
> > drivers/gpu/drm/panel/panel-ilitek-ili9881c.c | 238 +++++++++++++++++-
> > 1 file changed, 237 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
> > index 0145129d7c66..cf53b43e0907 100644
> > --- a/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
> > +++ b/drivers/gpu/drm/panel/panel-ilitek-ili9881c.c
> > @@ -42,6 +42,7 @@ struct ili9881c_desc {
> > const struct ili9881c_instr *init;
> > const size_t init_length;
> > const struct drm_display_mode *mode;
> > + const unsigned long mode_flags;
> > };
> >
> > struct ili9881c {
> > @@ -453,6 +454,213 @@ static const struct ili9881c_instr k101_im2byl02_init[] = {
> > ILI9881C_COMMAND_INSTR(0xD3, 0x3F), /* VN0 */
> > };
> >
>
> If you by any chance could comment a little on what goes on that would
> be nice.
> > +static const struct ili9881c_instr w552946ab_init[] = {
> > + ILI9881C_SWITCH_PAGE_INSTR(3),
> > + ILI9881C_COMMAND_INSTR(0x01, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x02, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x03, 0x53),
> > + ILI9881C_COMMAND_INSTR(0x04, 0x53),
> > + ILI9881C_COMMAND_INSTR(0x05, 0x13),
> > + ILI9881C_COMMAND_INSTR(0x06, 0x04),
> > + ILI9881C_COMMAND_INSTR(0x07, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x08, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x09, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x0A, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x0B, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x0C, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x0D, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x0E, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x0F, 0x00),
> > +
> > + ILI9881C_COMMAND_INSTR(0x10, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x11, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x12, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x13, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x14, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x15, 0x08),
> > + ILI9881C_COMMAND_INSTR(0x16, 0x10),
> > + ILI9881C_COMMAND_INSTR(0x17, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x18, 0x08),
> > + ILI9881C_COMMAND_INSTR(0x19, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x1A, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x1B, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x1C, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x1D, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x1E, 0xC0),
> > + ILI9881C_COMMAND_INSTR(0x1F, 0x80),
> > +
> > + ILI9881C_COMMAND_INSTR(0x20, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x21, 0x09),
> > + ILI9881C_COMMAND_INSTR(0x22, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x23, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x24, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x25, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x26, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x27, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x28, 0x55),
> > + ILI9881C_COMMAND_INSTR(0x29, 0x03),
> > + ILI9881C_COMMAND_INSTR(0x2A, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x2B, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x2C, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x2D, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x2E, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x2F, 0x00),
> > +
> > + ILI9881C_COMMAND_INSTR(0x30, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x31, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x32, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x33, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x34, 0x04),
> > + ILI9881C_COMMAND_INSTR(0x35, 0x05),
> > + ILI9881C_COMMAND_INSTR(0x36, 0x05),
> > + ILI9881C_COMMAND_INSTR(0x37, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x38, 0x3C),
> > + ILI9881C_COMMAND_INSTR(0x39, 0x35),
> > + ILI9881C_COMMAND_INSTR(0x3A, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x3B, 0x40),
> > + ILI9881C_COMMAND_INSTR(0x3C, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x3D, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x3E, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x3F, 0x00),
> > +
> > + ILI9881C_COMMAND_INSTR(0x40, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x41, 0x88),
> > + ILI9881C_COMMAND_INSTR(0x42, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x43, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x44, 0x1F),
> > +
> > + ILI9881C_COMMAND_INSTR(0x50, 0x01),
> > + ILI9881C_COMMAND_INSTR(0x51, 0x23),
> > + ILI9881C_COMMAND_INSTR(0x52, 0x45),
> > + ILI9881C_COMMAND_INSTR(0x53, 0x67),
> > + ILI9881C_COMMAND_INSTR(0x54, 0x89),
> > + ILI9881C_COMMAND_INSTR(0x55, 0xaB),
> > + ILI9881C_COMMAND_INSTR(0x56, 0x01),
> > + ILI9881C_COMMAND_INSTR(0x57, 0x23),
> > + ILI9881C_COMMAND_INSTR(0x58, 0x45),
> > + ILI9881C_COMMAND_INSTR(0x59, 0x67),
> > + ILI9881C_COMMAND_INSTR(0x5A, 0x89),
> > + ILI9881C_COMMAND_INSTR(0x5B, 0xAB),
> > + ILI9881C_COMMAND_INSTR(0x5C, 0xCD),
> > + ILI9881C_COMMAND_INSTR(0x5D, 0xEF),
> > + ILI9881C_COMMAND_INSTR(0x5E, 0x03),
> > + ILI9881C_COMMAND_INSTR(0x5F, 0x14),
> > +
> > + ILI9881C_COMMAND_INSTR(0x60, 0x15),
> > + ILI9881C_COMMAND_INSTR(0x61, 0x0C),
> > + ILI9881C_COMMAND_INSTR(0x62, 0x0D),
> > + ILI9881C_COMMAND_INSTR(0x63, 0x0E),
> > + ILI9881C_COMMAND_INSTR(0x64, 0x0F),
> > + ILI9881C_COMMAND_INSTR(0x65, 0x10),
> > + ILI9881C_COMMAND_INSTR(0x66, 0x11),
> > + ILI9881C_COMMAND_INSTR(0x67, 0x08),
> > + ILI9881C_COMMAND_INSTR(0x68, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x69, 0x0A),
> > + ILI9881C_COMMAND_INSTR(0x6A, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x6B, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x6C, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x6D, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x6E, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x6F, 0x02),
> > +
> > + ILI9881C_COMMAND_INSTR(0x70, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x71, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x72, 0x06),
> > + ILI9881C_COMMAND_INSTR(0x73, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x74, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x75, 0x14),
> > + ILI9881C_COMMAND_INSTR(0x76, 0x15),
> > + ILI9881C_COMMAND_INSTR(0x77, 0x0F),
> > + ILI9881C_COMMAND_INSTR(0x78, 0x0E),
> > + ILI9881C_COMMAND_INSTR(0x79, 0x0D),
> > + ILI9881C_COMMAND_INSTR(0x7A, 0x0C),
> > + ILI9881C_COMMAND_INSTR(0x7B, 0x11),
> > + ILI9881C_COMMAND_INSTR(0x7C, 0x10),
> > + ILI9881C_COMMAND_INSTR(0x7D, 0x06),
> > + ILI9881C_COMMAND_INSTR(0x7E, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x7F, 0x0A),
> > +
> > + ILI9881C_COMMAND_INSTR(0x80, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x81, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x82, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x83, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x84, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x85, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x86, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x87, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x88, 0x08),
> > + ILI9881C_COMMAND_INSTR(0x89, 0x02),
> > + ILI9881C_COMMAND_INSTR(0x8A, 0x02),
> > +
> > + ILI9881C_SWITCH_PAGE_INSTR(4),
> > + ILI9881C_COMMAND_INSTR(0x00, 0x80),
> > + ILI9881C_COMMAND_INSTR(0x70, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x71, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x66, 0xFE),
> > + ILI9881C_COMMAND_INSTR(0x82, 0x15),
> > + ILI9881C_COMMAND_INSTR(0x84, 0x15),
> > + ILI9881C_COMMAND_INSTR(0x85, 0x15),
> > + ILI9881C_COMMAND_INSTR(0x3a, 0x24),
> > + ILI9881C_COMMAND_INSTR(0x32, 0xAC),
> > + ILI9881C_COMMAND_INSTR(0x8C, 0x80),
> > + ILI9881C_COMMAND_INSTR(0x3C, 0xF5),
> > + ILI9881C_COMMAND_INSTR(0x88, 0x33),
> > +
> > + ILI9881C_SWITCH_PAGE_INSTR(1),
> > + ILI9881C_COMMAND_INSTR(0x22, 0x0A),
> > + ILI9881C_COMMAND_INSTR(0x31, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x53, 0x78),
> > + ILI9881C_COMMAND_INSTR(0x50, 0x5B),
> > + ILI9881C_COMMAND_INSTR(0x51, 0x5B),
> > + ILI9881C_COMMAND_INSTR(0x60, 0x20),
> > + ILI9881C_COMMAND_INSTR(0x61, 0x00),
> > + ILI9881C_COMMAND_INSTR(0x62, 0x0D),
> > + ILI9881C_COMMAND_INSTR(0x63, 0x00),
> > +
> > + ILI9881C_COMMAND_INSTR(0xA0, 0x00),
> > + ILI9881C_COMMAND_INSTR(0xA1, 0x10),
> > + ILI9881C_COMMAND_INSTR(0xA2, 0x1C),
> > + ILI9881C_COMMAND_INSTR(0xA3, 0x13),
> > + ILI9881C_COMMAND_INSTR(0xA4, 0x15),
> > + ILI9881C_COMMAND_INSTR(0xA5, 0x26),
> > + ILI9881C_COMMAND_INSTR(0xA6, 0x1A),
> > + ILI9881C_COMMAND_INSTR(0xA7, 0x1D),
> > + ILI9881C_COMMAND_INSTR(0xA8, 0x67),
> > + ILI9881C_COMMAND_INSTR(0xA9, 0x1C),
> > + ILI9881C_COMMAND_INSTR(0xAA, 0x29),
> > + ILI9881C_COMMAND_INSTR(0xAB, 0x5B),
> > + ILI9881C_COMMAND_INSTR(0xAC, 0x26),
> > + ILI9881C_COMMAND_INSTR(0xAD, 0x28),
> > + ILI9881C_COMMAND_INSTR(0xAE, 0x5C),
> > + ILI9881C_COMMAND_INSTR(0xAF, 0x30),
> > + ILI9881C_COMMAND_INSTR(0xB0, 0x31),
> > + ILI9881C_COMMAND_INSTR(0xB1, 0x2E),
> > + ILI9881C_COMMAND_INSTR(0xB2, 0x32),
> > + ILI9881C_COMMAND_INSTR(0xB3, 0x00),
> > +
> > + ILI9881C_COMMAND_INSTR(0xC0, 0x00),
> > + ILI9881C_COMMAND_INSTR(0xC1, 0x10),
> > + ILI9881C_COMMAND_INSTR(0xC2, 0x1C),
> > + ILI9881C_COMMAND_INSTR(0xC3, 0x13),
> > + ILI9881C_COMMAND_INSTR(0xC4, 0x15),
> > + ILI9881C_COMMAND_INSTR(0xC5, 0x26),
> > + ILI9881C_COMMAND_INSTR(0xC6, 0x1A),
> > + ILI9881C_COMMAND_INSTR(0xC7, 0x1D),
> > + ILI9881C_COMMAND_INSTR(0xC8, 0x67),
> > + ILI9881C_COMMAND_INSTR(0xC9, 0x1C),
> > + ILI9881C_COMMAND_INSTR(0xCA, 0x29),
> > + ILI9881C_COMMAND_INSTR(0xCB, 0x5B),
> > + ILI9881C_COMMAND_INSTR(0xCC, 0x26),
> > + ILI9881C_COMMAND_INSTR(0xCD, 0x28),
> > + ILI9881C_COMMAND_INSTR(0xCE, 0x5C),
> > + ILI9881C_COMMAND_INSTR(0xCF, 0x30),
> > + ILI9881C_COMMAND_INSTR(0xD0, 0x31),
> > + ILI9881C_COMMAND_INSTR(0xD1, 0x2E),
> > + ILI9881C_COMMAND_INSTR(0xD2, 0x32),
> > + ILI9881C_COMMAND_INSTR(0xD3, 0x00),
> > + ILI9881C_SWITCH_PAGE_INSTR(0),
> > +};
> > +
> > static inline struct ili9881c *panel_to_ili9881c(struct drm_panel *panel)
> > {
> > return container_of(panel, struct ili9881c, panel);
> > @@ -603,6 +811,23 @@ static const struct drm_display_mode k101_im2byl02_default_mode = {
> > .height_mm = 217,
> > };
> >
> > +static const struct drm_display_mode w552946aba_default_mode = {
> > + .clock = 64000,
> > +
> > + .hdisplay = 720,
> > + .hsync_start = 720 + 40,
> > + .hsync_end = 720 + 40 + 10,
> > + .htotal = 720 + 40 + 10 + 40,
> > +
> > + .vdisplay = 1280,
> > + .vsync_start = 1280 + 22,
> > + .vsync_end = 1280 + 22 + 4,
> > + .vtotal = 1280 + 22 + 4 + 11,
> > +
> > + .width_mm = 68,
> > + .height_mm = 121,
> > +};
> > +
> > static int ili9881c_get_modes(struct drm_panel *panel,
> > struct drm_connector *connector)
> > {
> > @@ -670,7 +895,7 @@ static int ili9881c_dsi_probe(struct mipi_dsi_device *dsi)
> >
> > drm_panel_add(&ctx->panel);
> >
> > - dsi->mode_flags = MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
> > + dsi->mode_flags = ctx->desc->mode_flags;
> > dsi->format = MIPI_DSI_FMT_RGB888;
> > dsi->lanes = 4;
> >
> > @@ -691,17 +916,28 @@ static const struct ili9881c_desc lhr050h41_desc = {
> > .init = lhr050h41_init,
> > .init_length = ARRAY_SIZE(lhr050h41_init),
> > .mode = &lhr050h41_default_mode,
> > + .mode_flags = MIPI_DSI_MODE_VIDEO_SYNC_PULSE,
> > };
> >
> > static const struct ili9881c_desc k101_im2byl02_desc = {
> > .init = k101_im2byl02_init,
> > .init_length = ARRAY_SIZE(k101_im2byl02_init),
> > .mode = &k101_im2byl02_default_mode,
> > + .mode_flags = MIPI_DSI_MODE_VIDEO_SYNC_PULSE,
> > +};
> > +
> > +static const struct ili9881c_desc w552946aba_desc = {
> > + .init = w552946ab_init,
> > + .init_length = ARRAY_SIZE(w552946ab_init),
> > + .mode = &w552946aba_default_mode,
> > + .mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST |
> > + MIPI_DSI_MODE_LPM | MIPI_DSI_MODE_EOT_PACKET,
I need to adjust this flag. I will rebase on drm-fixes
> > };
> >
> > static const struct of_device_id ili9881c_of_match[] = {
> > { .compatible = "bananapi,lhr050h41", .data = &lhr050h41_desc },
> > { .compatible = "feixin,k101-im2byl02", .data = &k101_im2byl02_desc },
> > + { .compatible = "wanchanglong,w552946aba", .data = &w552946aba_desc },
>
> wanchanglong - must be included in Documentation/devicetree/bindings/vendor-prefixes.yaml
>
Ok
> w552946aba must be documented in a panel DT schema.
> I assume adding it to Documentation/devicetree/bindings/display/panel/ilitek,ili9881c.yaml
> will do the trick.
Ok
Michael
>
> Sam
--
Michael Nazzareno Trimarchi
Co-Founder & Chief Executive Officer
M. +39 347 913 2170
michael@...rulasolutions.com
__________________________________
Amarula Solutions BV
Joop Geesinkweg 125, 1114 AB, Amsterdam, NL
T. +31 (0)85 111 9172
info@...rulasolutions.com
www.amarulasolutions.com
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