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46 lines
1.4 KiB
Diff
46 lines
1.4 KiB
Diff
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From 368bba37e67b4589b9286b2f68e6487acd5c0f79 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Thu, 2 Dec 2021 18:28:29 +0000
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Subject: [PATCH] drm/vc4: dpi: Ensure a default format is selected
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In a couple of error/incomplete configuration cases, the
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DPI_FORMAT bits wouldn't get set.
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Adopt a default of RGB666 in all these cases.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/gpu/drm/vc4/vc4_dpi.c | 13 +++++++++----
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1 file changed, 9 insertions(+), 4 deletions(-)
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--- a/drivers/gpu/drm/vc4/vc4_dpi.c
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+++ b/drivers/gpu/drm/vc4/vc4_dpi.c
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@@ -173,6 +173,10 @@ static void vc4_dpi_encoder_enable(struc
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dpi_c |= VC4_SET_FIELD(DPI_ORDER_BGR,
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DPI_ORDER);
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break;
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+ default:
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+ DRM_ERROR("Unknown media bus format %d\n",
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+ bus_format);
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+ fallthrough;
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case MEDIA_BUS_FMT_RGB666_1X18:
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dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_1,
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DPI_FORMAT);
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@@ -187,11 +191,12 @@ static void vc4_dpi_encoder_enable(struc
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dpi_c |= VC4_SET_FIELD(DPI_FORMAT_16BIT_565_RGB_3,
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DPI_FORMAT);
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break;
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- default:
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- DRM_ERROR("Unknown media bus format %d\n",
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- bus_format);
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- break;
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}
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+ } else {
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+ /* Default to 18bit if no connector found. */
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+ dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_1,
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+ DPI_FORMAT);
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+
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}
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if (connector->display_info.bus_flags &
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