2022-05-16 21:40:32 +00:00
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From bbd8dd64c1083232f3da8e097207a5b539ab91c9 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Thu, 25 Nov 2021 14:45:33 +0000
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Subject: [PATCH] drm/vc4: Add support for composite syncs to vc4_dpi
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The hardware can combine H&V syncs onto the output enable line
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as composite syncs, so add the relevant configuration to do that.
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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 | 25 ++++++++++++++++---------
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1 file changed, 16 insertions(+), 9 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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@@ -131,7 +131,7 @@ static void vc4_dpi_encoder_enable(struc
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struct vc4_dpi *dpi = vc4_encoder->dpi;
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struct drm_connector_list_iter conn_iter;
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struct drm_connector *connector = NULL, *connector_scan;
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- u32 dpi_c = DPI_ENABLE | DPI_OUTPUT_ENABLE_MODE;
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+ u32 dpi_c = DPI_ENABLE;
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int ret;
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/* Look up the connector attached to DPI so we can get the
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2023-03-12 14:16:50 +00:00
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@@ -202,15 +202,22 @@ static void vc4_dpi_encoder_enable(struc
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2022-05-16 21:40:32 +00:00
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dpi_c |= VC4_SET_FIELD(DPI_FORMAT_18BIT_666_RGB_1, DPI_FORMAT);
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}
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- if (mode->flags & DRM_MODE_FLAG_NHSYNC)
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- dpi_c |= DPI_HSYNC_INVERT;
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- else if (!(mode->flags & DRM_MODE_FLAG_PHSYNC))
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- dpi_c |= DPI_HSYNC_DISABLE;
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-
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- if (mode->flags & DRM_MODE_FLAG_NVSYNC)
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- dpi_c |= DPI_VSYNC_INVERT;
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- else if (!(mode->flags & DRM_MODE_FLAG_PVSYNC))
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- dpi_c |= DPI_VSYNC_DISABLE;
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+ if (mode->flags & DRM_MODE_FLAG_CSYNC) {
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+ if (mode->flags & DRM_MODE_FLAG_NCSYNC)
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+ dpi_c |= DPI_OUTPUT_ENABLE_INVERT;
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+ } else {
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+ dpi_c |= DPI_OUTPUT_ENABLE_MODE;
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+
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+ if (mode->flags & DRM_MODE_FLAG_NHSYNC)
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+ dpi_c |= DPI_HSYNC_INVERT;
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+ else if (!(mode->flags & DRM_MODE_FLAG_PHSYNC))
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+ dpi_c |= DPI_HSYNC_DISABLE;
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+
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+ if (mode->flags & DRM_MODE_FLAG_NVSYNC)
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+ dpi_c |= DPI_VSYNC_INVERT;
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+ else if (!(mode->flags & DRM_MODE_FLAG_PVSYNC))
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+ dpi_c |= DPI_VSYNC_DISABLE;
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+ }
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DPI_WRITE(DPI_C, dpi_c);
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