[PATCH v20 17/25] drm/mediatek: add display merge async reset control
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STALE1639d
SUPERSEDED: 2 (1M)
From: Nancy.Lin <hidden>
Date: 2022-05-04 09:18:05
Also in:
dri-devel, linux-mediatek, llvm
Subsystem:
drm drivers, drm drivers for mediatek, the rest · Maintainers:
David Airlie, Simona Vetter, Chun-Kuang Hu, Philipp Zabel, Linus Torvalds
Status: Superseded by v22 (posted 2022-05-26). [go to v22]
Revision v20 (17 revisions archived); 2 review trailers.
Revisions (17)
- v4
- v7 [diff against previous]
- v8 [diff against previous]
- v9 [diff against previous]
- v10 [diff against previous]
- v11 [diff against previous]
- v12 [diff against previous]
- v13 [diff against previous] re-posted go to this post
- v14 [diff against previous]
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- v16 [diff against previous]
- v17 [diff against previous]
- v18 [diff against previous]
- v19 [diff against previous]
- v20 current [diff against previous]
- v21 [diff against previous]
- v22 [diff against previous]
Add merge async reset control in mtk_merge_stop. Async hw doesn't do self reset on each sof signal(start of frame), so need to reset the async to clear the hw status for the next merge start. Signed-off-by: Nancy.Lin <redacted> Reviewed-by: CK Hu <redacted> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> --- drivers/gpu/drm/mediatek/mtk_disp_merge.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_merge.c b/drivers/gpu/drm/mediatek/mtk_disp_merge.c
index 2e13d2fb429e..6428b6203ffe 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_merge.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_merge.c@@ -8,6 +8,7 @@ #include <linux/of_device.h> #include <linux/of_irq.h> #include <linux/platform_device.h> +#include <linux/reset.h> #include <linux/soc/mediatek/mtk-cmdq.h> #include "mtk_drm_ddp_comp.h"
@@ -67,6 +68,7 @@ struct mtk_disp_merge { struct cmdq_client_reg cmdq_reg; bool fifo_en; bool mute_support; + struct reset_control *reset_ctl; }; void mtk_merge_start(struct device *dev)
@@ -101,6 +103,9 @@ void mtk_merge_stop_cmdq(struct device *dev, struct cmdq_pkt *cmdq_pkt) mtk_ddp_write(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs, DISP_REG_MERGE_CTRL); + + if (priv->async_clk) + reset_control_reset(priv->reset_ctl); } static void mtk_merge_fifo_setting(struct mtk_disp_merge *priv,
@@ -264,6 +269,12 @@ static int mtk_disp_merge_probe(struct platform_device *pdev) return PTR_ERR(priv->async_clk); } + if (priv->async_clk) { + priv->reset_ctl = devm_reset_control_get_optional_exclusive(dev, NULL); + if (IS_ERR(priv->reset_ctl)) + return PTR_ERR(priv->reset_ctl); + } + #if IS_REACHABLE(CONFIG_MTK_CMDQ) ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0); if (ret)
--
2.18.0
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