50 lines
1.5 KiB
Diff
50 lines
1.5 KiB
Diff
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From d32a940f02b4be62206b40355170d844944fc8a0 Mon Sep 17 00:00:00 2001
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From: Ondrej Jirman <megous@megous.com>
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Date: Sun, 5 Jul 2020 15:55:46 +0200
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Subject: [PATCH 195/323] drm/panel: st7703: Improve power up sequence panel
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The datasheet specifies that there needs to be 120ms delay after
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the sleep out command, not after reset as the driver assumes.
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The delay between init commands and the sleep out is not necessary.
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Signed-off-by: Ondrej Jirman <megous@megous.com>
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---
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drivers/gpu/drm/panel/panel-sitronix-st7703.c | 7 ++-----
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1 file changed, 2 insertions(+), 5 deletions(-)
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diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7703.c b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
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index c22e7c49e..3af2a6c28 100644
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--- a/drivers/gpu/drm/panel/panel-sitronix-st7703.c
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+++ b/drivers/gpu/drm/panel/panel-sitronix-st7703.c
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@@ -290,7 +290,6 @@ static int xbd599_init_sequence(struct st7703 *ctx)
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dsi_dcs_write_seq(dsi, ST7703_CMD_SETBGP,
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0x07, /* VREF_SEL = 4.2V */
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0x07 /* NVREF_SEL = 4.2V */);
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- msleep(20);
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dsi_dcs_write_seq(dsi, ST7703_CMD_SETVCOM,
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0x2C, /* VCOMDC_F = -0.67V */
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@@ -367,16 +366,14 @@ static int st7703_enable(struct drm_panel *panel)
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return ret;
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}
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- msleep(20);
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-
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ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
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if (ret < 0) {
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dev_err(ctx->dev, "Failed to exit sleep mode: %d\n", ret);
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return ret;
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}
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- /* Panel is operational 120 msec after reset */
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- msleep(60);
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+ /* Dsiplay on can be issued 120 msec after sleep out */
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+ msleep(120);
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ret = mipi_dsi_dcs_set_display_on(dsi);
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if (ret)
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--
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2.34.0
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