From bd58cbe5c5155279ccd85c29ddef53094cf6dc81 Mon Sep 17 00:00:00 2001 From: Dave Stevenson Date: Wed, 15 Dec 2021 17:44:49 +0000 Subject: [PATCH] drm/vc4: Remove splitting the bridge chain from the driver. Splitting the bridge chain fails for atomic bridges as the framework can't add the relevant state in drm_atomic_add_encoder_bridges. The chain was split because we needed to power up before calling pre_enable, but that is now done in mode_set, and will move into the framework. Signed-off-by: Dave Stevenson --- drivers/gpu/drm/vc4/vc4_dsi.c | 47 ----------------------------------- 1 file changed, 47 deletions(-) --- a/drivers/gpu/drm/vc4/vc4_dsi.c +++ b/drivers/gpu/drm/vc4/vc4_dsi.c @@ -557,7 +557,6 @@ struct vc4_dsi { struct platform_device *pdev; struct drm_bridge *out_bridge; - struct list_head bridge_chain; void __iomem *regs; @@ -794,23 +793,9 @@ static void vc4_dsi_encoder_disable(stru { struct vc4_dsi *dsi = to_vc4_dsi(encoder); struct device *dev = &dsi->pdev->dev; - struct drm_bridge *iter; - - list_for_each_entry_reverse(iter, &dsi->bridge_chain, chain_node) { - if (iter->funcs->disable) - iter->funcs->disable(iter); - - if (iter == dsi->out_bridge) - break; - } vc4_dsi_ulps(dsi, true); - list_for_each_entry_from(iter, &dsi->bridge_chain, chain_node) { - if (iter->funcs->post_disable) - iter->funcs->post_disable(iter); - } - clk_disable_unprepare(dsi->pll_phy_clock); clk_disable_unprepare(dsi->escape_clock); clk_disable_unprepare(dsi->pixel_clock); @@ -1112,12 +1097,6 @@ static void vc4_dsi_encoder_enable(struc struct vc4_dsi_encoder *vc4_encoder = to_vc4_dsi_encoder(encoder); struct vc4_dsi *dsi = vc4_encoder->dsi; bool debug_dump_regs = false; - struct drm_bridge *iter; - - list_for_each_entry_reverse(iter, &dsi->bridge_chain, chain_node) { - if (iter->funcs->pre_enable) - iter->funcs->pre_enable(iter); - } if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) { DSI_PORT_WRITE(DISP0_CTRL, @@ -1134,11 +1113,6 @@ static void vc4_dsi_encoder_enable(struc DSI_DISP0_ENABLE); } - list_for_each_entry(iter, &dsi->bridge_chain, chain_node) { - if (iter->funcs->enable) - iter->funcs->enable(iter); - } - if (debug_dump_regs) { struct drm_printer p = drm_info_printer(&dsi->pdev->dev); dev_info(&dsi->pdev->dev, "DSI regs after:\n"); @@ -1626,7 +1600,6 @@ static int vc4_dsi_bind(struct device *d dsi->variant = of_device_get_match_data(dev); - INIT_LIST_HEAD(&dsi->bridge_chain); dsi->encoder.type = dsi->variant->port ? VC4_ENCODER_TYPE_DSI1 : VC4_ENCODER_TYPE_DSI0; @@ -1763,32 +1736,12 @@ static int vc4_dsi_bind(struct device *d ret = drm_bridge_attach(encoder, dsi->out_bridge, NULL, 0); if (ret) return ret; - /* Disable the atomic helper calls into the bridge. We - * manually call the bridge pre_enable / enable / etc. calls - * from our driver, since we need to sequence them within the - * encoder's enable/disable paths. - */ - list_splice_init(&encoder->bridge_chain, &dsi->bridge_chain); return 0; } -static void vc4_dsi_unbind(struct device *dev, struct device *master, - void *data) -{ - struct vc4_dsi *dsi = dev_get_drvdata(dev); - struct drm_encoder *encoder = &dsi->encoder.base; - - /* - * Restore the bridge_chain so the bridge detach procedure can happen - * normally. - */ - list_splice_init(&dsi->bridge_chain, &encoder->bridge_chain); -} - static const struct component_ops vc4_dsi_ops = { .bind = vc4_dsi_bind, - .unbind = vc4_dsi_unbind, }; static int vc4_dsi_dev_probe(struct platform_device *pdev)