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From: Tom Callaway <tcallawa@redhat.com>
To: "Noralf Trønnes" <noralf@tronnes.org>,
	"David Airlie" <airlied@linux.ie>,
	dri-devel@lists.freedesktop.org
Cc: Tom Callaway <tcallawa@redhat.com>
Subject: [PATCH] drm/tinydrm/mi0283qt: Always set rotation value
Date: Mon, 23 Apr 2018 12:16:39 -0400	[thread overview]
Message-ID: <20180423161639.14420-1-tcallawa@redhat.com> (raw)

The PiTFT (ili9340) has a hardware reset circuit that resets only
on power-on and not on each reboot through a gpio like the
rpi-display does. As a result, we need to always apply the
rotation value regardless of the display "on/off" state.
Moved the rotation setting code below out_enable:.

Signed-off-by: Tom Callaway <tcallawa@redhat.com>
---
 drivers/gpu/drm/tinydrm/mi0283qt.c | 41 +++++++++++++++++++++-----------------
 1 file changed, 23 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/tinydrm/mi0283qt.c b/drivers/gpu/drm/tinydrm/mi0283qt.c
index 4e6d2ee94e55..2bb9e3ce4823 100644
--- a/drivers/gpu/drm/tinydrm/mi0283qt.c
+++ b/drivers/gpu/drm/tinydrm/mi0283qt.c
@@ -84,24 +84,6 @@ static void mi0283qt_enable(struct drm_simple_display_pipe *pipe,
 	/* Memory Access Control */
 	mipi_dbi_command(mipi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
 
-	switch (mipi->rotation) {
-	default:
-		addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY |
-			    ILI9341_MADCTL_MX;
-		break;
-	case 90:
-		addr_mode = ILI9341_MADCTL_MY;
-		break;
-	case 180:
-		addr_mode = ILI9341_MADCTL_MV;
-		break;
-	case 270:
-		addr_mode = ILI9341_MADCTL_MX;
-		break;
-	}
-	addr_mode |= ILI9341_MADCTL_BGR;
-	mipi_dbi_command(mipi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
-
 	/* Frame Rate */
 	mipi_dbi_command(mipi, ILI9341_FRMCTR1, 0x00, 0x1b);
 
@@ -127,6 +109,29 @@ static void mi0283qt_enable(struct drm_simple_display_pipe *pipe,
 	msleep(100);
 
 out_enable:
+	/* The PiTFT (ili9340) has a hardware reset circuit that
+	 * resets only on power-on and not on each reboot through
+	 * a gpio like the rpi-display does.
+	 * As a result, we need to always apply the rotation value
+	 * regardless of the display "on/off" state.
+	 */
+	switch (mipi->rotation) {
+	default:
+		addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY |
+			    ILI9341_MADCTL_MX;
+		break;
+	case 90:
+		addr_mode = ILI9341_MADCTL_MY;
+		break;
+	case 180:
+		addr_mode = ILI9341_MADCTL_MV;
+		break;
+	case 270:
+		addr_mode = ILI9341_MADCTL_MX;
+		break;
+	}
+	addr_mode |= ILI9341_MADCTL_BGR;
+	mipi_dbi_command(mipi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
 	mipi_dbi_enable_flush(mipi, crtc_state, plane_state);
 }
 
-- 
2.14.3

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             reply	other threads:[~2018-04-23 16:16 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-23 16:16 Tom Callaway [this message]
2018-04-24 16:52 ` [PATCH] drm/tinydrm/mi0283qt: Always set rotation value Noralf Trønnes
2018-04-24 19:16   ` Daniel Vetter
2018-04-24 19:21     ` Noralf Trønnes
2018-04-30  9:09   ` Noralf Trønnes

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