linux-kernel - [PATCH v2 06/10] drm/ingenic: Set DMA descriptor chain address in probe

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Message-Id: <20200629235210.441709-6-paul@crapouillou.net>
Date:   Tue, 30 Jun 2020 01:52:06 +0200
From:   Paul Cercueil <paul@...pouillou.net>
To:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>
Cc:     od@...c.me, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org, linux-mips@...r.kernel.org,
        linux-kernel@...r.kernel.org, Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH v2 06/10] drm/ingenic: Set DMA descriptor chain address in probe

The address of the DMA descriptor never changes. It can therefore be set
in the probe function.

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---

Notes:
    v2: No change

 drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
index 924c8daf071a..f7b0c5dc8cd8 100644
--- a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
+++ b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
@@ -358,8 +358,6 @@ static void ingenic_drm_crtc_atomic_flush(struct drm_crtc *crtc,
 		ingenic_drm_crtc_update_ctrl(priv, finfo);
 
 		clk_set_rate(priv->pix_clk, state->adjusted_mode.clock * 1000);
-
-		regmap_write(priv->map, JZ_REG_LCD_DA0, priv->dma_hwdesc->next);
 	}
 
 	if (event) {
@@ -757,6 +755,9 @@ static int ingenic_drm_probe(struct platform_device *pdev)
 		}
 	}
 
+	/* Set address of our DMA descriptor chain */
+	regmap_write(priv->map, JZ_REG_LCD_DA0, priv->dma_hwdesc_phys);
+
 	ret = drm_dev_register(drm, 0);
 	if (ret) {
 		dev_err(dev, "Failed to register DRM driver\n");
-- 
2.27.0