linux-kernel - [PATCH] drm/stm: ltdc: restore calls to clk

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Date:   Mon, 27 May 2019 13:58:30 +0200
From:   Benjamin Gaignard <benjamin.gaignard@...com>
To:     <yannick.fertre@...com>, <philippe.cornu@...com>,
        <airlied@...ux.ie>, <daniel@...ll.ch>, <alexandre.torgue@...com>
CC:     <dri-devel@...ts.freedesktop.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Benjamin Gaignard <benjamin.gaignard@...aro.org>
Subject: [PATCH] drm/stm: ltdc: restore calls to clk_{enable/disable}

From: Benjamin Gaignard <benjamin.gaignard@...aro.org>

Restore calls to clk_{enable/disable} deleted after applying the wrong
version of the patch

Fixes: fd6905fca4f0 ("drm/stm: ltdc: remove clk_round_rate comment")

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...aro.org>
---
 drivers/gpu/drm/stm/ltdc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
index ae2aaf2a62ee..ac29890edeb6 100644
--- a/drivers/gpu/drm/stm/ltdc.c
+++ b/drivers/gpu/drm/stm/ltdc.c
@@ -507,10 +507,12 @@ static bool ltdc_crtc_mode_fixup(struct drm_crtc *crtc,
 	struct ltdc_device *ldev = crtc_to_ltdc(crtc);
 	int rate = mode->clock * 1000;
 
+	clk_disable(ldev->pixel_clk);
 	if (clk_set_rate(ldev->pixel_clk, rate) < 0) {
 		DRM_ERROR("Cannot set rate (%dHz) for pixel clk\n", rate);
 		return false;
 	}
+	clk_enable(ldev->pixel_clk);
 
 	adjusted_mode->clock = clk_get_rate(ldev->pixel_clk) / 1000;
 
-- 
2.15.0