472 lines
12 KiB
C
472 lines
12 KiB
C
/*
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* Copyright (C) 2016 Marek Vasut <marex@denx.de>
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*
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* This code is based on drivers/video/fbdev/mxsfb.c :
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* Copyright (C) 2010 Juergen Beisert, Pengutronix
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* Copyright (C) 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
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* Copyright (C) 2008 Embedded Alley Solutions, Inc All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/spinlock.h>
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#include <linux/clk.h>
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#include <linux/component.h>
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#include <linux/list.h>
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#include <linux/of_device.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/pm_runtime.h>
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#include <linux/reservation.h>
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#include <drm/drmP.h>
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#include <drm/drm_atomic.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_fb_helper.h>
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#include <drm/drm_fb_cma_helper.h>
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#include <drm/drm_gem_cma_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_simple_kms_helper.h>
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#include "mxsfb_drv.h"
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#include "mxsfb_regs.h"
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enum mxsfb_devtype {
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MXSFB_V3,
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MXSFB_V4,
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};
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static const struct mxsfb_devdata mxsfb_devdata[] = {
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[MXSFB_V3] = {
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.transfer_count = LCDC_V3_TRANSFER_COUNT,
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.cur_buf = LCDC_V3_CUR_BUF,
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.next_buf = LCDC_V3_NEXT_BUF,
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.debug0 = LCDC_V3_DEBUG0,
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.hs_wdth_mask = 0xff,
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.hs_wdth_shift = 24,
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.ipversion = 3,
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},
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[MXSFB_V4] = {
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.transfer_count = LCDC_V4_TRANSFER_COUNT,
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.cur_buf = LCDC_V4_CUR_BUF,
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.next_buf = LCDC_V4_NEXT_BUF,
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.debug0 = LCDC_V4_DEBUG0,
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.hs_wdth_mask = 0x3fff,
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.hs_wdth_shift = 18,
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.ipversion = 4,
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},
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};
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static const uint32_t mxsfb_formats[] = {
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DRM_FORMAT_XRGB8888,
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DRM_FORMAT_RGB565
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};
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static struct mxsfb_drm_private *
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drm_pipe_to_mxsfb_drm_private(struct drm_simple_display_pipe *pipe)
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{
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return container_of(pipe, struct mxsfb_drm_private, pipe);
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}
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void mxsfb_enable_axi_clk(struct mxsfb_drm_private *mxsfb)
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{
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if (mxsfb->clk_axi)
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clk_prepare_enable(mxsfb->clk_axi);
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}
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void mxsfb_disable_axi_clk(struct mxsfb_drm_private *mxsfb)
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{
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if (mxsfb->clk_axi)
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clk_disable_unprepare(mxsfb->clk_axi);
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}
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static const struct drm_mode_config_funcs mxsfb_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 const struct drm_mode_config_helper_funcs mxsfb_mode_config_helpers = {
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.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
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};
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static void mxsfb_pipe_enable(struct drm_simple_display_pipe *pipe,
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struct drm_crtc_state *crtc_state,
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struct drm_plane_state *plane_state)
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{
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struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
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struct drm_device *drm = pipe->plane.dev;
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pm_runtime_get_sync(drm->dev);
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drm_panel_prepare(mxsfb->panel);
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mxsfb_crtc_enable(mxsfb);
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drm_panel_enable(mxsfb->panel);
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}
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static void mxsfb_pipe_disable(struct drm_simple_display_pipe *pipe)
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{
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struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
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struct drm_device *drm = pipe->plane.dev;
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struct drm_crtc *crtc = &pipe->crtc;
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struct drm_pending_vblank_event *event;
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drm_panel_disable(mxsfb->panel);
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mxsfb_crtc_disable(mxsfb);
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drm_panel_unprepare(mxsfb->panel);
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pm_runtime_put_sync(drm->dev);
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spin_lock_irq(&drm->event_lock);
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event = crtc->state->event;
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if (event) {
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crtc->state->event = NULL;
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drm_crtc_send_vblank_event(crtc, event);
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}
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spin_unlock_irq(&drm->event_lock);
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}
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static void mxsfb_pipe_update(struct drm_simple_display_pipe *pipe,
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struct drm_plane_state *plane_state)
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{
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struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
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mxsfb_plane_atomic_update(mxsfb, plane_state);
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}
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static int mxsfb_pipe_enable_vblank(struct drm_simple_display_pipe *pipe)
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{
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struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
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/* Clear and enable VBLANK IRQ */
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mxsfb_enable_axi_clk(mxsfb);
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writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
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writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_SET);
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mxsfb_disable_axi_clk(mxsfb);
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return 0;
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}
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static void mxsfb_pipe_disable_vblank(struct drm_simple_display_pipe *pipe)
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{
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struct mxsfb_drm_private *mxsfb = drm_pipe_to_mxsfb_drm_private(pipe);
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/* Disable and clear VBLANK IRQ */
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mxsfb_enable_axi_clk(mxsfb);
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writel(CTRL1_CUR_FRAME_DONE_IRQ_EN, mxsfb->base + LCDC_CTRL1 + REG_CLR);
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writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
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mxsfb_disable_axi_clk(mxsfb);
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}
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static struct drm_simple_display_pipe_funcs mxsfb_funcs = {
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.enable = mxsfb_pipe_enable,
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.disable = mxsfb_pipe_disable,
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.update = mxsfb_pipe_update,
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.prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
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.enable_vblank = mxsfb_pipe_enable_vblank,
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.disable_vblank = mxsfb_pipe_disable_vblank,
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};
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static int mxsfb_load(struct drm_device *drm, unsigned long flags)
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{
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struct platform_device *pdev = to_platform_device(drm->dev);
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struct mxsfb_drm_private *mxsfb;
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struct resource *res;
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int ret;
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mxsfb = devm_kzalloc(&pdev->dev, sizeof(*mxsfb), GFP_KERNEL);
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if (!mxsfb)
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return -ENOMEM;
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drm->dev_private = mxsfb;
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mxsfb->devdata = &mxsfb_devdata[pdev->id_entry->driver_data];
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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mxsfb->base = devm_ioremap_resource(drm->dev, res);
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if (IS_ERR(mxsfb->base))
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return PTR_ERR(mxsfb->base);
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mxsfb->clk = devm_clk_get(drm->dev, NULL);
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if (IS_ERR(mxsfb->clk))
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return PTR_ERR(mxsfb->clk);
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mxsfb->clk_axi = devm_clk_get(drm->dev, "axi");
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if (IS_ERR(mxsfb->clk_axi))
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mxsfb->clk_axi = NULL;
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mxsfb->clk_disp_axi = devm_clk_get(drm->dev, "disp_axi");
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if (IS_ERR(mxsfb->clk_disp_axi))
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mxsfb->clk_disp_axi = NULL;
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ret = dma_set_mask_and_coherent(drm->dev, DMA_BIT_MASK(32));
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if (ret)
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return ret;
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pm_runtime_enable(drm->dev);
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ret = drm_vblank_init(drm, drm->mode_config.num_crtc);
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if (ret < 0) {
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dev_err(drm->dev, "Failed to initialise vblank\n");
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goto err_vblank;
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}
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/* Modeset init */
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drm_mode_config_init(drm);
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ret = mxsfb_create_output(drm);
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if (ret < 0) {
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dev_err(drm->dev, "Failed to create outputs\n");
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goto err_vblank;
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}
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ret = drm_simple_display_pipe_init(drm, &mxsfb->pipe, &mxsfb_funcs,
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mxsfb_formats, ARRAY_SIZE(mxsfb_formats), NULL,
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&mxsfb->connector);
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if (ret < 0) {
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dev_err(drm->dev, "Cannot setup simple display pipe\n");
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goto err_vblank;
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}
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ret = drm_panel_attach(mxsfb->panel, &mxsfb->connector);
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if (ret) {
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dev_err(drm->dev, "Cannot connect panel\n");
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goto err_vblank;
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}
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drm->mode_config.min_width = MXSFB_MIN_XRES;
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drm->mode_config.min_height = MXSFB_MIN_YRES;
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drm->mode_config.max_width = MXSFB_MAX_XRES;
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drm->mode_config.max_height = MXSFB_MAX_YRES;
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drm->mode_config.funcs = &mxsfb_mode_config_funcs;
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drm->mode_config.helper_private = &mxsfb_mode_config_helpers;
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drm_mode_config_reset(drm);
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pm_runtime_get_sync(drm->dev);
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ret = drm_irq_install(drm, platform_get_irq(pdev, 0));
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pm_runtime_put_sync(drm->dev);
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if (ret < 0) {
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dev_err(drm->dev, "Failed to install IRQ handler\n");
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goto err_irq;
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}
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drm_kms_helper_poll_init(drm);
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mxsfb->fbdev = drm_fbdev_cma_init(drm, 32,
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drm->mode_config.num_connector);
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if (IS_ERR(mxsfb->fbdev)) {
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ret = PTR_ERR(mxsfb->fbdev);
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mxsfb->fbdev = NULL;
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dev_err(drm->dev, "Failed to init FB CMA area\n");
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goto err_cma;
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}
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platform_set_drvdata(pdev, drm);
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drm_helper_hpd_irq_event(drm);
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return 0;
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err_cma:
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drm_irq_uninstall(drm);
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err_irq:
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drm_panel_detach(mxsfb->panel);
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err_vblank:
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pm_runtime_disable(drm->dev);
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return ret;
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}
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static void mxsfb_unload(struct drm_device *drm)
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{
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struct mxsfb_drm_private *mxsfb = drm->dev_private;
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if (mxsfb->fbdev)
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drm_fbdev_cma_fini(mxsfb->fbdev);
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drm_kms_helper_poll_fini(drm);
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drm_mode_config_cleanup(drm);
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pm_runtime_get_sync(drm->dev);
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drm_irq_uninstall(drm);
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pm_runtime_put_sync(drm->dev);
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drm->dev_private = NULL;
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pm_runtime_disable(drm->dev);
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}
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static void mxsfb_lastclose(struct drm_device *drm)
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{
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struct mxsfb_drm_private *mxsfb = drm->dev_private;
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drm_fbdev_cma_restore_mode(mxsfb->fbdev);
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}
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static void mxsfb_irq_preinstall(struct drm_device *drm)
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{
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struct mxsfb_drm_private *mxsfb = drm->dev_private;
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mxsfb_pipe_disable_vblank(&mxsfb->pipe);
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}
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static irqreturn_t mxsfb_irq_handler(int irq, void *data)
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{
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struct drm_device *drm = data;
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struct mxsfb_drm_private *mxsfb = drm->dev_private;
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u32 reg;
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mxsfb_enable_axi_clk(mxsfb);
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reg = readl(mxsfb->base + LCDC_CTRL1);
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if (reg & CTRL1_CUR_FRAME_DONE_IRQ)
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drm_crtc_handle_vblank(&mxsfb->pipe.crtc);
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writel(CTRL1_CUR_FRAME_DONE_IRQ, mxsfb->base + LCDC_CTRL1 + REG_CLR);
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mxsfb_disable_axi_clk(mxsfb);
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return IRQ_HANDLED;
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}
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DEFINE_DRM_GEM_CMA_FOPS(fops);
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static struct drm_driver mxsfb_driver = {
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.driver_features = DRIVER_GEM | DRIVER_MODESET |
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DRIVER_PRIME | DRIVER_ATOMIC |
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DRIVER_HAVE_IRQ,
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.lastclose = mxsfb_lastclose,
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.irq_handler = mxsfb_irq_handler,
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.irq_preinstall = mxsfb_irq_preinstall,
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.irq_uninstall = mxsfb_irq_preinstall,
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.gem_free_object_unlocked = drm_gem_cma_free_object,
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.gem_vm_ops = &drm_gem_cma_vm_ops,
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.dumb_create = drm_gem_cma_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_export = drm_gem_prime_export,
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.gem_prime_import = drm_gem_prime_import,
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.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
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.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
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.gem_prime_vmap = drm_gem_cma_prime_vmap,
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.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
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.gem_prime_mmap = drm_gem_cma_prime_mmap,
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.fops = &fops,
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.name = "mxsfb-drm",
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.desc = "MXSFB Controller DRM",
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.date = "20160824",
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.major = 1,
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.minor = 0,
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};
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static const struct platform_device_id mxsfb_devtype[] = {
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{ .name = "imx23-fb", .driver_data = MXSFB_V3, },
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{ .name = "imx28-fb", .driver_data = MXSFB_V4, },
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{ .name = "imx6sx-fb", .driver_data = MXSFB_V4, },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(platform, mxsfb_devtype);
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static const struct of_device_id mxsfb_dt_ids[] = {
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{ .compatible = "fsl,imx23-lcdif", .data = &mxsfb_devtype[0], },
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{ .compatible = "fsl,imx28-lcdif", .data = &mxsfb_devtype[1], },
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{ .compatible = "fsl,imx6sx-lcdif", .data = &mxsfb_devtype[2], },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, mxsfb_dt_ids);
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static int mxsfb_probe(struct platform_device *pdev)
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{
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struct drm_device *drm;
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const struct of_device_id *of_id =
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of_match_device(mxsfb_dt_ids, &pdev->dev);
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int ret;
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if (!pdev->dev.of_node)
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return -ENODEV;
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if (of_id)
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pdev->id_entry = of_id->data;
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drm = drm_dev_alloc(&mxsfb_driver, &pdev->dev);
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if (IS_ERR(drm))
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return PTR_ERR(drm);
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ret = mxsfb_load(drm, 0);
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if (ret)
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goto err_free;
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ret = drm_dev_register(drm, 0);
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if (ret)
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goto err_unload;
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return 0;
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err_unload:
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mxsfb_unload(drm);
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err_free:
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drm_dev_unref(drm);
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return ret;
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}
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static int mxsfb_remove(struct platform_device *pdev)
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{
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struct drm_device *drm = platform_get_drvdata(pdev);
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drm_dev_unregister(drm);
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mxsfb_unload(drm);
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drm_dev_unref(drm);
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return 0;
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}
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#ifdef CONFIG_PM_SLEEP
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static int mxsfb_suspend(struct device *dev)
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{
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struct drm_device *drm = dev_get_drvdata(dev);
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return drm_mode_config_helper_suspend(drm);
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}
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static int mxsfb_resume(struct device *dev)
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{
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struct drm_device *drm = dev_get_drvdata(dev);
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return drm_mode_config_helper_resume(drm);
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}
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#endif
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static const struct dev_pm_ops mxsfb_pm_ops = {
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SET_SYSTEM_SLEEP_PM_OPS(mxsfb_suspend, mxsfb_resume)
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};
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static struct platform_driver mxsfb_platform_driver = {
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.probe = mxsfb_probe,
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.remove = mxsfb_remove,
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.id_table = mxsfb_devtype,
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.driver = {
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.name = "mxsfb",
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.of_match_table = mxsfb_dt_ids,
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.pm = &mxsfb_pm_ops,
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},
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};
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module_platform_driver(mxsfb_platform_driver);
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MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
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MODULE_DESCRIPTION("Freescale MXS DRM/KMS driver");
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MODULE_LICENSE("GPL");
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