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48 lines
1.8 KiB
Diff
48 lines
1.8 KiB
Diff
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From bc76ab2e772242d0d92d38b2a5648485ee1a1b44 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Michael=20B=C3=BCchler?= <michael.buechler@posteo.net>
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Date: Sun, 19 Nov 2023 01:22:20 +0100
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Subject: [PATCH] drm/vc4: Set TV margins on the composite connector state
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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The Raspberry Pi bootloader can pass a set of margin values to the
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kernel cmdline as part of the video= option. These should result in
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black borders on the output to compensate for TVs where the visible area
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on the screen is smaller than the full extents of the video image.
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With the VC4 driver this currently works on an HDMI connector, but not
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on a composite video connector.
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The TV margins from the kernel cmdline are available in the
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drm_cmdline_mode structure of the composite video connector. Apply them
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to the connector state in the connector reset function. This is how it
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is implemented for the VC4 HDMI connector.
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Signed-off-by: Michael Büchler <michael.buechler@posteo.net>
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---
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drivers/gpu/drm/vc4/vc4_vec.c | 5 +++++
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1 file changed, 5 insertions(+)
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--- a/drivers/gpu/drm/vc4/vc4_vec.c
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+++ b/drivers/gpu/drm/vc4/vc4_vec.c
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@@ -436,6 +436,9 @@ static void vc4_vec_connector_reset(stru
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/* preserve TV standard */
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if (connector->state)
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connector->state->tv.mode = vc4_vec_get_default_mode(connector);
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+
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+ /* apply TV margins from the cmdline_mode */
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+ drm_atomic_helper_connector_tv_reset(connector);
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}
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static int vc4_vec_connector_atomic_check(struct drm_connector *conn,
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@@ -483,6 +486,8 @@ static int vc4_vec_connector_init(struct
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drm_connector_helper_add(connector, &vc4_vec_connector_helper_funcs);
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+ drm_connector_attach_tv_margin_properties(connector);
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+
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drm_object_attach_property(&connector->base,
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dev->mode_config.tv_mode_property,
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vc4_vec_get_default_mode(connector));
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