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50 lines
2 KiB
Diff
50 lines
2 KiB
Diff
From 5e8442892eda8db362919cff27a61ccd5b41dea6 Mon Sep 17 00:00:00 2001
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From: Dom Cobley <popcornmix@gmail.com>
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Date: Wed, 21 Apr 2021 15:15:42 +0100
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Subject: [PATCH 494/552] vc4/drm: hdmi: Handle case when bvb clock is null
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Pi2/3 have no bvb clock but want the other clocks to remain enabled here
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See: https://github.com/raspberrypi/linux/issues/4299
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Signed-off-by: Dom Cobley <popcornmix@gmail.com>
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---
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drivers/gpu/drm/vc4/vc4_hdmi.c | 9 ++++++---
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1 file changed, 6 insertions(+), 3 deletions(-)
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diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
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index 5e45263339af..e45960423b9e 100644
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--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
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+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
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@@ -969,7 +969,8 @@ static void vc4_hdmi_encoder_post_crtc_powerdown(struct drm_encoder *encoder,
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vc4_hdmi->variant->phy_disable(vc4_hdmi);
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clk_disable_unprepare(vc4_hdmi->pixel_bvb_clock);
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- clk_request_done(vc4_hdmi->bvb_req);
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+ if (vc4_hdmi->bvb_req)
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+ clk_request_done(vc4_hdmi->bvb_req);
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clk_disable_unprepare(vc4_hdmi->hsm_clock);
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clk_request_done(vc4_hdmi->hsm_req);
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clk_disable_unprepare(vc4_hdmi->pixel_clock);
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@@ -1276,7 +1277,8 @@ static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder,
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else
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bvb_rate = 75000000;
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- vc4_hdmi->bvb_req = clk_request_start(vc4_hdmi->pixel_bvb_clock, bvb_rate);
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+ if (vc4_hdmi->pixel_bvb_clock)
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+ vc4_hdmi->bvb_req = clk_request_start(vc4_hdmi->pixel_bvb_clock, bvb_rate);
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if (IS_ERR(vc4_hdmi->bvb_req)) {
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DRM_ERROR("Failed to set pixel bvb clock rate: %ld\n", PTR_ERR(vc4_hdmi->bvb_req));
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clk_request_done(vc4_hdmi->hsm_req);
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@@ -1288,7 +1290,8 @@ static void vc4_hdmi_encoder_pre_crtc_configure(struct drm_encoder *encoder,
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ret = clk_prepare_enable(vc4_hdmi->pixel_bvb_clock);
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if (ret) {
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DRM_ERROR("Failed to turn on pixel bvb clock: %d\n", ret);
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- clk_request_done(vc4_hdmi->bvb_req);
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+ if (vc4_hdmi->bvb_req)
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+ clk_request_done(vc4_hdmi->bvb_req);
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clk_request_done(vc4_hdmi->hsm_req);
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clk_disable_unprepare(vc4_hdmi->hsm_clock);
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clk_disable_unprepare(vc4_hdmi->pixel_clock);
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--
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2.33.0
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