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![Thomas Zimmermann](/assets/img/avatar_default.png)
Move the generic fbdev implementation into its own source and header file. Adapt drivers. No functional changes, but some of the internal helpers have been renamed to fit into the drm_fbdev_ naming scheme. v3: * rename drm_fbdev.{c,h} to drm_fbdev_generic.{c,h} * rebase onto vmwgfx changes * rebase onto xlnx changes * fix include statements in amdgpu Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20221103151446.2638-22-tzimmermann@suse.de
446 lines
11 KiB
C
446 lines
11 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* (C) COPYRIGHT 2012-2013 ARM Limited. All rights reserved.
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*
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* Parts of this file were based on sources as follows:
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*
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* Copyright (c) 2006-2008 Intel Corporation
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* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
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* Copyright (C) 2011 Texas Instruments
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*/
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/**
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* DOC: ARM PrimeCell PL110 and PL111 CLCD Driver
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*
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* The PL110/PL111 is a simple LCD controller that can support TFT
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* and STN displays. This driver exposes a standard KMS interface
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* for them.
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*
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* The driver currently doesn't expose the cursor. The DRM API for
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* cursors requires support for 64x64 ARGB8888 cursor images, while
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* the hardware can only support 64x64 monochrome with masking
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* cursors. While one could imagine trying to hack something together
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* to look at the ARGB8888 and program reasonable in monochrome, we
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* just don't expose the cursor at all instead, and leave cursor
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* support to the application software cursor layer.
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*
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* TODO:
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*
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* - Fix race between setting plane base address and getting IRQ for
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* vsync firing the pageflip completion.
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*
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* - Read back hardware state at boot to skip reprogramming the
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* hardware when doing a no-op modeset.
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*
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* - Use the CLKSEL bit to support switching between the two external
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* clock parents.
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*/
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#include <linux/amba/bus.h>
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#include <linux/dma-buf.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/of_graph.h>
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#include <linux/of_reserved_mem.h>
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#include <linux/shmem_fs.h>
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#include <linux/slab.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_bridge.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_fbdev_generic.h>
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#include <drm/drm_fourcc.h>
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#include <drm/drm_gem_dma_helper.h>
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#include <drm/drm_gem_framebuffer_helper.h>
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#include <drm/drm_of.h>
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#include <drm/drm_panel.h>
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#include <drm/drm_probe_helper.h>
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#include <drm/drm_vblank.h>
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#include "pl111_drm.h"
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#include "pl111_versatile.h"
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#include "pl111_nomadik.h"
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#define DRIVER_DESC "DRM module for PL111"
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static const struct drm_mode_config_funcs mode_config_funcs = {
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.fb_create = drm_gem_fb_create,
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.atomic_check = drm_atomic_helper_check,
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.atomic_commit = drm_atomic_helper_commit,
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};
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static int pl111_modeset_init(struct drm_device *dev)
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{
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struct drm_mode_config *mode_config;
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struct pl111_drm_dev_private *priv = dev->dev_private;
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struct device_node *np = dev->dev->of_node;
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struct device_node *remote;
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struct drm_panel *panel = NULL;
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struct drm_bridge *bridge = NULL;
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bool defer = false;
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int ret;
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int i;
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ret = drmm_mode_config_init(dev);
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if (ret)
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return ret;
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mode_config = &dev->mode_config;
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mode_config->funcs = &mode_config_funcs;
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mode_config->min_width = 1;
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mode_config->max_width = 1024;
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mode_config->min_height = 1;
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mode_config->max_height = 768;
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i = 0;
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for_each_endpoint_of_node(np, remote) {
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struct drm_panel *tmp_panel;
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struct drm_bridge *tmp_bridge;
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dev_dbg(dev->dev, "checking endpoint %d\n", i);
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ret = drm_of_find_panel_or_bridge(dev->dev->of_node,
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0, i,
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&tmp_panel,
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&tmp_bridge);
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if (ret) {
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if (ret == -EPROBE_DEFER) {
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/*
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* Something deferred, but that is often just
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* another way of saying -ENODEV, but let's
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* cast a vote for later deferral.
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*/
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defer = true;
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} else if (ret != -ENODEV) {
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/* Continue, maybe something else is working */
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dev_err(dev->dev,
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"endpoint %d returns %d\n", i, ret);
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}
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}
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if (tmp_panel) {
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dev_info(dev->dev,
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"found panel on endpoint %d\n", i);
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panel = tmp_panel;
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}
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if (tmp_bridge) {
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dev_info(dev->dev,
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"found bridge on endpoint %d\n", i);
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bridge = tmp_bridge;
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}
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i++;
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}
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/*
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* If we can't find neither panel nor bridge on any of the
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* endpoints, and any of them retured -EPROBE_DEFER, then
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* let's defer this driver too.
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*/
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if ((!panel && !bridge) && defer)
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return -EPROBE_DEFER;
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if (panel) {
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bridge = drm_panel_bridge_add_typed(panel,
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DRM_MODE_CONNECTOR_Unknown);
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if (IS_ERR(bridge)) {
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ret = PTR_ERR(bridge);
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goto finish;
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}
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} else if (bridge) {
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dev_info(dev->dev, "Using non-panel bridge\n");
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} else {
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dev_err(dev->dev, "No bridge, exiting\n");
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return -ENODEV;
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}
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priv->bridge = bridge;
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if (panel) {
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priv->panel = panel;
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priv->connector = drm_panel_bridge_connector(bridge);
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}
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ret = pl111_display_init(dev);
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if (ret != 0) {
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dev_err(dev->dev, "Failed to init display\n");
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goto out_bridge;
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}
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ret = drm_simple_display_pipe_attach_bridge(&priv->pipe,
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bridge);
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if (ret)
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return ret;
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if (!priv->variant->broken_vblank) {
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ret = drm_vblank_init(dev, 1);
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if (ret != 0) {
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dev_err(dev->dev, "Failed to init vblank\n");
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goto out_bridge;
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}
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}
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drm_mode_config_reset(dev);
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drm_kms_helper_poll_init(dev);
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goto finish;
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out_bridge:
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if (panel)
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drm_panel_bridge_remove(bridge);
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finish:
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return ret;
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}
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static struct drm_gem_object *
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pl111_gem_import_sg_table(struct drm_device *dev,
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struct dma_buf_attachment *attach,
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struct sg_table *sgt)
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{
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struct pl111_drm_dev_private *priv = dev->dev_private;
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/*
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* When using device-specific reserved memory we can't import
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* DMA buffers: those are passed by reference in any global
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* memory and we can only handle a specific range of memory.
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*/
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if (priv->use_device_memory)
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return ERR_PTR(-EINVAL);
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return drm_gem_dma_prime_import_sg_table(dev, attach, sgt);
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}
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DEFINE_DRM_GEM_DMA_FOPS(drm_fops);
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static const struct drm_driver pl111_drm_driver = {
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.driver_features =
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DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
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.ioctls = NULL,
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.fops = &drm_fops,
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.name = "pl111",
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.desc = DRIVER_DESC,
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.date = "20170317",
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.major = 1,
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.minor = 0,
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.patchlevel = 0,
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.dumb_create = drm_gem_dma_dumb_create,
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.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
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.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
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.gem_prime_import_sg_table = pl111_gem_import_sg_table,
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.gem_prime_mmap = drm_gem_prime_mmap,
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#if defined(CONFIG_DEBUG_FS)
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.debugfs_init = pl111_debugfs_init,
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#endif
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};
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static int pl111_amba_probe(struct amba_device *amba_dev,
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const struct amba_id *id)
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{
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struct device *dev = &amba_dev->dev;
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struct pl111_drm_dev_private *priv;
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const struct pl111_variant_data *variant = id->data;
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struct drm_device *drm;
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int ret;
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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drm = drm_dev_alloc(&pl111_drm_driver, dev);
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if (IS_ERR(drm))
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return PTR_ERR(drm);
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amba_set_drvdata(amba_dev, drm);
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priv->drm = drm;
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drm->dev_private = priv;
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priv->variant = variant;
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ret = of_reserved_mem_device_init(dev);
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if (!ret) {
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dev_info(dev, "using device-specific reserved memory\n");
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priv->use_device_memory = true;
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}
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if (of_property_read_u32(dev->of_node, "max-memory-bandwidth",
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&priv->memory_bw)) {
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dev_info(dev, "no max memory bandwidth specified, assume unlimited\n");
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priv->memory_bw = 0;
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}
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/* The two main variants swap this register */
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if (variant->is_pl110 || variant->is_lcdc) {
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priv->ienb = CLCD_PL110_IENB;
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priv->ctrl = CLCD_PL110_CNTL;
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} else {
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priv->ienb = CLCD_PL111_IENB;
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priv->ctrl = CLCD_PL111_CNTL;
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}
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priv->regs = devm_ioremap_resource(dev, &amba_dev->res);
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if (IS_ERR(priv->regs)) {
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dev_err(dev, "%s failed mmio\n", __func__);
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ret = PTR_ERR(priv->regs);
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goto dev_put;
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}
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/* This may override some variant settings */
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ret = pl111_versatile_init(dev, priv);
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if (ret)
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goto dev_put;
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pl111_nomadik_init(dev);
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/* turn off interrupts before requesting the irq */
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writel(0, priv->regs + priv->ienb);
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ret = devm_request_irq(dev, amba_dev->irq[0], pl111_irq, 0,
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variant->name, priv);
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if (ret != 0) {
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dev_err(dev, "%s failed irq %d\n", __func__, ret);
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return ret;
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}
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ret = pl111_modeset_init(drm);
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if (ret != 0)
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goto dev_put;
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ret = drm_dev_register(drm, 0);
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if (ret < 0)
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goto dev_put;
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drm_fbdev_generic_setup(drm, priv->variant->fb_bpp);
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return 0;
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dev_put:
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drm_dev_put(drm);
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of_reserved_mem_device_release(dev);
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return ret;
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}
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static void pl111_amba_remove(struct amba_device *amba_dev)
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{
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struct device *dev = &amba_dev->dev;
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struct drm_device *drm = amba_get_drvdata(amba_dev);
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struct pl111_drm_dev_private *priv = drm->dev_private;
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drm_dev_unregister(drm);
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if (priv->panel)
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drm_panel_bridge_remove(priv->bridge);
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drm_dev_put(drm);
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of_reserved_mem_device_release(dev);
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}
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/*
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* This early variant lacks the 565 and 444 pixel formats.
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*/
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static const u32 pl110_pixel_formats[] = {
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DRM_FORMAT_ABGR8888,
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DRM_FORMAT_XBGR8888,
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DRM_FORMAT_ARGB8888,
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DRM_FORMAT_XRGB8888,
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DRM_FORMAT_ABGR1555,
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DRM_FORMAT_XBGR1555,
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DRM_FORMAT_ARGB1555,
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DRM_FORMAT_XRGB1555,
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};
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static const struct pl111_variant_data pl110_variant = {
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.name = "PL110",
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.is_pl110 = true,
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.formats = pl110_pixel_formats,
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.nformats = ARRAY_SIZE(pl110_pixel_formats),
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.fb_bpp = 16,
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};
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/* RealView, Versatile Express etc use this modern variant */
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static const u32 pl111_pixel_formats[] = {
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DRM_FORMAT_ABGR8888,
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DRM_FORMAT_XBGR8888,
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DRM_FORMAT_ARGB8888,
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DRM_FORMAT_XRGB8888,
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DRM_FORMAT_BGR565,
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DRM_FORMAT_RGB565,
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DRM_FORMAT_ABGR1555,
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DRM_FORMAT_XBGR1555,
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DRM_FORMAT_ARGB1555,
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DRM_FORMAT_XRGB1555,
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DRM_FORMAT_ABGR4444,
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DRM_FORMAT_XBGR4444,
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DRM_FORMAT_ARGB4444,
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DRM_FORMAT_XRGB4444,
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};
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static const struct pl111_variant_data pl111_variant = {
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.name = "PL111",
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.formats = pl111_pixel_formats,
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.nformats = ARRAY_SIZE(pl111_pixel_formats),
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.fb_bpp = 32,
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};
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static const u32 pl110_nomadik_pixel_formats[] = {
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DRM_FORMAT_RGB888,
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DRM_FORMAT_BGR888,
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DRM_FORMAT_ABGR8888,
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DRM_FORMAT_XBGR8888,
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DRM_FORMAT_ARGB8888,
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DRM_FORMAT_XRGB8888,
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DRM_FORMAT_BGR565,
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DRM_FORMAT_RGB565,
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DRM_FORMAT_ABGR1555,
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DRM_FORMAT_XBGR1555,
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DRM_FORMAT_ARGB1555,
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DRM_FORMAT_XRGB1555,
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DRM_FORMAT_ABGR4444,
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DRM_FORMAT_XBGR4444,
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DRM_FORMAT_ARGB4444,
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DRM_FORMAT_XRGB4444,
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};
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static const struct pl111_variant_data pl110_nomadik_variant = {
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.name = "LCDC (PL110 Nomadik)",
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.formats = pl110_nomadik_pixel_formats,
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.nformats = ARRAY_SIZE(pl110_nomadik_pixel_formats),
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.is_lcdc = true,
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.st_bitmux_control = true,
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.broken_vblank = true,
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.fb_bpp = 16,
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};
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static const struct amba_id pl111_id_table[] = {
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{
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.id = 0x00041110,
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.mask = 0x000fffff,
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.data = (void *)&pl110_variant,
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},
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{
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.id = 0x00180110,
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.mask = 0x00fffffe,
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.data = (void *)&pl110_nomadik_variant,
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},
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{
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.id = 0x00041111,
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.mask = 0x000fffff,
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.data = (void *)&pl111_variant,
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},
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{0, 0},
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};
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MODULE_DEVICE_TABLE(amba, pl111_id_table);
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static struct amba_driver pl111_amba_driver __maybe_unused = {
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.drv = {
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.name = "drm-clcd-pl111",
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},
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.probe = pl111_amba_probe,
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.remove = pl111_amba_remove,
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.id_table = pl111_id_table,
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};
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#ifdef CONFIG_ARM_AMBA
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module_amba_driver(pl111_amba_driver);
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#endif
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MODULE_DESCRIPTION(DRIVER_DESC);
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MODULE_AUTHOR("ARM Ltd.");
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MODULE_LICENSE("GPL");
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