From: Linus Walleij <linus.walleij@linaro.org>
To: Thierry Reding <thierry.reding@gmail.com>,
Sam Ravnborg <sam@ravnborg.org>,
dri-devel@lists.freedesktop.org
Cc: newbytee@protonmail.com, Stephan Gerhold <stephan@gerhold.net>
Subject: [PATCH] drm/panel-notatek-nt35510: Fix MTP read init
Date: Sun, 9 Aug 2020 00:43:22 +0200 [thread overview]
Message-ID: <20200808224322.1507713-1-linus.walleij@linaro.org> (raw)
In order to successfully read ID of the MTP panel the
panel MTP control page must be unlocked. Previously
this wasn't encountered because in the setup with this
panel the power wasn't ever really dropped. When power
gets dropped from the panel, MTP needs to be unlocked.
Cc: newbytee@protonmail.com
Cc: Stephan Gerhold <stephan@gerhold.net>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
---
drivers/gpu/drm/panel/panel-novatek-nt35510.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/drivers/gpu/drm/panel/panel-novatek-nt35510.c b/drivers/gpu/drm/panel/panel-novatek-nt35510.c
index 4a8fa908a2cf..d0cd2128df1d 100644
--- a/drivers/gpu/drm/panel/panel-novatek-nt35510.c
+++ b/drivers/gpu/drm/panel/panel-novatek-nt35510.c
@@ -376,6 +376,10 @@ struct nt35510 {
};
/* Manufacturer command has strictly this byte sequence */
+static const u8 nt35510_mauc_mtp_read_param[] = { 0xAA, 0x55, 0x25, 0x01 };
+static const u8 nt35510_mauc_mtp_read_setting[] = { 0x01, 0x02, 0x00, 0x20,
+ 0x33, 0x13, 0x00, 0x40,
+ 0x00, 0x00, 0x23, 0x02 };
static const u8 nt35510_mauc_select_page_0[] = { 0x55, 0xAA, 0x52, 0x08, 0x00 };
static const u8 nt35510_mauc_select_page_1[] = { 0x55, 0xAA, 0x52, 0x08, 0x01 };
static const u8 nt35510_vgh_on[] = { 0x01 };
@@ -698,6 +702,18 @@ static int nt35510_power_on(struct nt35510 *nt)
usleep_range(120000, 140000);
}
+ ret = nt35510_send_long(nt, dsi, MCS_CMD_MTP_READ_PARAM,
+ ARRAY_SIZE(nt35510_mauc_mtp_read_param),
+ nt35510_mauc_mtp_read_param);
+ if (ret)
+ return ret;
+
+ ret = nt35510_send_long(nt, dsi, MCS_CMD_MTP_READ_SETTING,
+ ARRAY_SIZE(nt35510_mauc_mtp_read_setting),
+ nt35510_mauc_mtp_read_setting);
+ if (ret)
+ return ret;
+
ret = nt35510_read_id(nt);
if (ret)
return ret;
--
2.26.2
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next reply other threads:[~2020-08-08 22:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-08 22:43 Linus Walleij [this message]
2020-08-10 13:04 ` [PATCH] drm/panel-notatek-nt35510: Fix MTP read init Daniel Vetter
2020-08-11 20:24 ` Linus Walleij
2020-08-11 20:58 ` Daniel Vetter
2020-08-12 9:12 ` Linus Walleij
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