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path: root/drivers/gpu/drm/mxsfb/mxsfb_crtc.c
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Diffstat (limited to 'drivers/gpu/drm/mxsfb/mxsfb_crtc.c')
-rw-r--r--drivers/gpu/drm/mxsfb/mxsfb_crtc.c343
1 files changed, 0 insertions, 343 deletions
diff --git a/drivers/gpu/drm/mxsfb/mxsfb_crtc.c b/drivers/gpu/drm/mxsfb/mxsfb_crtc.c
deleted file mode 100644
index b69ace8bf526..000000000000
--- a/drivers/gpu/drm/mxsfb/mxsfb_crtc.c
+++ /dev/null
@@ -1,343 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2016 Marek Vasut <marex@denx.de>
- *
- * This code is based on drivers/video/fbdev/mxsfb.c :
- * Copyright (C) 2010 Juergen Beisert, Pengutronix
- * Copyright (C) 2008-2009 Freescale Semiconductor, Inc. All Rights Reserved.
- * Copyright (C) 2008 Embedded Alley Solutions, Inc All Rights Reserved.
- */
-
-#include <linux/clk.h>
-#include <linux/iopoll.h>
-#include <linux/of_graph.h>
-#include <linux/platform_data/simplefb.h>
-
-#include <video/videomode.h>
-
-#include <drm/drm_atomic_helper.h>
-#include <drm/drm_crtc.h>
-#include <drm/drm_fb_cma_helper.h>
-#include <drm/drm_fb_helper.h>
-#include <drm/drm_gem_cma_helper.h>
-#include <drm/drm_of.h>
-#include <drm/drm_plane_helper.h>
-#include <drm/drm_probe_helper.h>
-#include <drm/drm_simple_kms_helper.h>
-#include <drm/drm_vblank.h>
-
-#include "mxsfb_drv.h"
-#include "mxsfb_regs.h"
-
-#define MXS_SET_ADDR 0x4
-#define MXS_CLR_ADDR 0x8
-#define MODULE_CLKGATE BIT(30)
-#define MODULE_SFTRST BIT(31)
-/* 1 second delay should be plenty of time for block reset */
-#define RESET_TIMEOUT 1000000
-
-static u32 set_hsync_pulse_width(struct mxsfb_drm_private *mxsfb, u32 val)
-{
- return (val & mxsfb->devdata->hs_wdth_mask) <<
- mxsfb->devdata->hs_wdth_shift;
-}
-
-/* Setup the MXSFB registers for decoding the pixels out of the framebuffer */
-static int mxsfb_set_pixel_fmt(struct mxsfb_drm_private *mxsfb)
-{
- struct drm_crtc *crtc = &mxsfb->pipe.crtc;
- struct drm_device *drm = crtc->dev;
- const u32 format = crtc->primary->state->fb->format->format;
- u32 ctrl, ctrl1;
-
- ctrl = CTRL_BYPASS_COUNT | CTRL_MASTER;
-
- /*
- * WARNING: The bus width, CTRL_SET_BUS_WIDTH(), is configured to
- * match the selected mode here. This differs from the original
- * MXSFB driver, which had the option to configure the bus width
- * to arbitrary value. This limitation should not pose an issue.
- */
-
- /* CTRL1 contains IRQ config and status bits, preserve those. */
- ctrl1 = readl(mxsfb->base + LCDC_CTRL1);
- ctrl1 &= CTRL1_CUR_FRAME_DONE_IRQ_EN | CTRL1_CUR_FRAME_DONE_IRQ;
-
- switch (format) {
- case DRM_FORMAT_RGB565:
- dev_dbg(drm->dev, "Setting up RGB565 mode\n");
- ctrl |= CTRL_SET_WORD_LENGTH(0);
- ctrl1 |= CTRL1_SET_BYTE_PACKAGING(0xf);
- break;
- case DRM_FORMAT_XRGB8888:
- dev_dbg(drm->dev, "Setting up XRGB8888 mode\n");
- ctrl |= CTRL_SET_WORD_LENGTH(3);
- /* Do not use packed pixels = one pixel per word instead. */
- ctrl1 |= CTRL1_SET_BYTE_PACKAGING(0x7);
- break;
- default:
- dev_err(drm->dev, "Unhandled pixel format %08x\n", format);
- return -EINVAL;
- }
-
- writel(ctrl1, mxsfb->base + LCDC_CTRL1);
- writel(ctrl, mxsfb->base + LCDC_CTRL);
-
- return 0;
-}
-
-static void mxsfb_set_bus_fmt(struct mxsfb_drm_private *mxsfb)
-{
- struct drm_crtc *crtc = &mxsfb->pipe.crtc;
- struct drm_device *drm = crtc->dev;
- u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
- u32 reg;
-
- reg = readl(mxsfb->base + LCDC_CTRL);
-
- if (mxsfb->connector->display_info.num_bus_formats)
- bus_format = mxsfb->connector->display_info.bus_formats[0];
-
- DRM_DEV_DEBUG_DRIVER(drm->dev, "Using bus_format: 0x%08X\n",
- bus_format);
-
- reg &= ~CTRL_BUS_WIDTH_MASK;
- switch (bus_format) {
- case MEDIA_BUS_FMT_RGB565_1X16:
- reg |= CTRL_SET_BUS_WIDTH(STMLCDIF_16BIT);
- break;
- case MEDIA_BUS_FMT_RGB666_1X18:
- reg |= CTRL_SET_BUS_WIDTH(STMLCDIF_18BIT);
- break;
- case MEDIA_BUS_FMT_RGB888_1X24:
- reg |= CTRL_SET_BUS_WIDTH(STMLCDIF_24BIT);
- break;
- default:
- dev_err(drm->dev, "Unknown media bus format %d\n", bus_format);
- break;
- }
- writel(reg, mxsfb->base + LCDC_CTRL);
-}
-
-static void mxsfb_enable_controller(struct mxsfb_drm_private *mxsfb)
-{
- u32 reg;
-
- if (mxsfb->clk_disp_axi)
- clk_prepare_enable(mxsfb->clk_disp_axi);
- clk_prepare_enable(mxsfb->clk);
-
- /* If it was disabled, re-enable the mode again */
- writel(CTRL_DOTCLK_MODE, mxsfb->base + LCDC_CTRL + REG_SET);
-
- /* Enable the SYNC signals first, then the DMA engine */
- reg = readl(mxsfb->base + LCDC_VDCTRL4);
- reg |= VDCTRL4_SYNC_SIGNALS_ON;
- writel(reg, mxsfb->base + LCDC_VDCTRL4);
-
- writel(CTRL_RUN, mxsfb->base + LCDC_CTRL + REG_SET);
-}
-
-static void mxsfb_disable_controller(struct mxsfb_drm_private *mxsfb)
-{
- u32 reg;
-
- /*
- * Even if we disable the controller here, it will still continue
- * until its FIFOs are running out of data
- */
- writel(CTRL_DOTCLK_MODE, mxsfb->base + LCDC_CTRL + REG_CLR);
-
- readl_poll_timeout(mxsfb->base + LCDC_CTRL, reg, !(reg & CTRL_RUN),
- 0, 1000);
-
- reg = readl(mxsfb->base + LCDC_VDCTRL4);
- reg &= ~VDCTRL4_SYNC_SIGNALS_ON;
- writel(reg, mxsfb->base + LCDC_VDCTRL4);
-
- clk_disable_unprepare(mxsfb->clk);
- if (mxsfb->clk_disp_axi)
- clk_disable_unprepare(mxsfb->clk_disp_axi);
-}
-
-/*
- * Clear the bit and poll it cleared. This is usually called with
- * a reset address and mask being either SFTRST(bit 31) or CLKGATE
- * (bit 30).
- */
-static int clear_poll_bit(void __iomem *addr, u32 mask)
-{
- u32 reg;
-
- writel(mask, addr + MXS_CLR_ADDR);
- return readl_poll_timeout(addr, reg, !(reg & mask), 0, RESET_TIMEOUT);
-}
-
-static int mxsfb_reset_block(void __iomem *reset_addr)
-{
- int ret;
-
- ret = clear_poll_bit(reset_addr, MODULE_SFTRST);
- if (ret)
- return ret;
-
- writel(MODULE_CLKGATE, reset_addr + MXS_CLR_ADDR);
-
- ret = clear_poll_bit(reset_addr, MODULE_SFTRST);
- if (ret)
- return ret;
-
- return clear_poll_bit(reset_addr, MODULE_CLKGATE);
-}
-
-static dma_addr_t mxsfb_get_fb_paddr(struct mxsfb_drm_private *mxsfb)
-{
- struct drm_framebuffer *fb = mxsfb->pipe.plane.state->fb;
- struct drm_gem_cma_object *gem;
-
- if (!fb)
- return 0;
-
- gem = drm_fb_cma_get_gem_obj(fb, 0);
- if (!gem)
- return 0;
-
- return gem->paddr;
-}
-
-static void mxsfb_crtc_mode_set_nofb(struct mxsfb_drm_private *mxsfb)
-{
- struct drm_device *drm = mxsfb->pipe.crtc.dev;
- struct drm_display_mode *m = &mxsfb->pipe.crtc.state->adjusted_mode;
- u32 bus_flags = mxsfb->connector->display_info.bus_flags;
- u32 vdctrl0, vsync_pulse_len, hsync_pulse_len;
- int err;
-
- /*
- * It seems, you can't re-program the controller if it is still
- * running. This may lead to shifted pictures (FIFO issue?), so
- * first stop the controller and drain its FIFOs.
- */
-
- /* Mandatory eLCDIF reset as per the Reference Manual */
- err = mxsfb_reset_block(mxsfb->base);
- if (err)
- return;
-
- /* Clear the FIFOs */
- writel(CTRL1_FIFO_CLEAR, mxsfb->base + LCDC_CTRL1 + REG_SET);
-
- err = mxsfb_set_pixel_fmt(mxsfb);
- if (err)
- return;
-
- clk_set_rate(mxsfb->clk, m->crtc_clock * 1000);
-
- if (mxsfb->bridge && mxsfb->bridge->timings)
- bus_flags = mxsfb->bridge->timings->input_bus_flags;
-
- DRM_DEV_DEBUG_DRIVER(drm->dev, "Pixel clock: %dkHz (actual: %dkHz)\n",
- m->crtc_clock,
- (int)(clk_get_rate(mxsfb->clk) / 1000));
- DRM_DEV_DEBUG_DRIVER(drm->dev, "Connector bus_flags: 0x%08X\n",
- bus_flags);
- DRM_DEV_DEBUG_DRIVER(drm->dev, "Mode flags: 0x%08X\n", m->flags);
-
- writel(TRANSFER_COUNT_SET_VCOUNT(m->crtc_vdisplay) |
- TRANSFER_COUNT_SET_HCOUNT(m->crtc_hdisplay),
- mxsfb->base + mxsfb->devdata->transfer_count);
-
- vsync_pulse_len = m->crtc_vsync_end - m->crtc_vsync_start;
-
- vdctrl0 = VDCTRL0_ENABLE_PRESENT | /* Always in DOTCLOCK mode */
- VDCTRL0_VSYNC_PERIOD_UNIT |
- VDCTRL0_VSYNC_PULSE_WIDTH_UNIT |
- VDCTRL0_SET_VSYNC_PULSE_WIDTH(vsync_pulse_len);
- if (m->flags & DRM_MODE_FLAG_PHSYNC)
- vdctrl0 |= VDCTRL0_HSYNC_ACT_HIGH;
- if (m->flags & DRM_MODE_FLAG_PVSYNC)
- vdctrl0 |= VDCTRL0_VSYNC_ACT_HIGH;
- /* Make sure Data Enable is high active by default */
- if (!(bus_flags & DRM_BUS_FLAG_DE_LOW))
- vdctrl0 |= VDCTRL0_ENABLE_ACT_HIGH;
- /*
- * DRM_BUS_FLAG_PIXDATA_DRIVE_ defines are controller centric,
- * controllers VDCTRL0_DOTCLK is display centric.
- * Drive on positive edge -> display samples on falling edge
- * DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE -> VDCTRL0_DOTCLK_ACT_FALLING
- */
- if (bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_POSEDGE)
- vdctrl0 |= VDCTRL0_DOTCLK_ACT_FALLING;
-
- writel(vdctrl0, mxsfb->base + LCDC_VDCTRL0);
-
- mxsfb_set_bus_fmt(mxsfb);
-
- /* Frame length in lines. */
- writel(m->crtc_vtotal, mxsfb->base + LCDC_VDCTRL1);
-
- /* Line length in units of clocks or pixels. */
- hsync_pulse_len = m->crtc_hsync_end - m->crtc_hsync_start;
- writel(set_hsync_pulse_width(mxsfb, hsync_pulse_len) |
- VDCTRL2_SET_HSYNC_PERIOD(m->crtc_htotal),
- mxsfb->base + LCDC_VDCTRL2);
-
- writel(SET_HOR_WAIT_CNT(m->crtc_htotal - m->crtc_hsync_start) |
- SET_VERT_WAIT_CNT(m->crtc_vtotal - m->crtc_vsync_start),
- mxsfb->base + LCDC_VDCTRL3);
-
- writel(SET_DOTCLK_H_VALID_DATA_CNT(m->hdisplay),
- mxsfb->base + LCDC_VDCTRL4);
-}
-
-void mxsfb_crtc_enable(struct mxsfb_drm_private *mxsfb)
-{
- dma_addr_t paddr;
-
- mxsfb_enable_axi_clk(mxsfb);
- mxsfb_crtc_mode_set_nofb(mxsfb);
-
- /* Write cur_buf as well to avoid an initial corrupt frame */
- paddr = mxsfb_get_fb_paddr(mxsfb);
- if (paddr) {
- writel(paddr, mxsfb->base + mxsfb->devdata->cur_buf);
- writel(paddr, mxsfb->base + mxsfb->devdata->next_buf);
- }
-
- mxsfb_enable_controller(mxsfb);
-}
-
-void mxsfb_crtc_disable(struct mxsfb_drm_private *mxsfb)
-{
- mxsfb_disable_controller(mxsfb);
- mxsfb_disable_axi_clk(mxsfb);
-}
-
-void mxsfb_plane_atomic_update(struct mxsfb_drm_private *mxsfb,
- struct drm_plane_state *state)
-{
- struct drm_simple_display_pipe *pipe = &mxsfb->pipe;
- struct drm_crtc *crtc = &pipe->crtc;
- struct drm_pending_vblank_event *event;
- dma_addr_t paddr;
-
- spin_lock_irq(&crtc->dev->event_lock);
- event = crtc->state->event;
- if (event) {
- crtc->state->event = NULL;
-
- if (drm_crtc_vblank_get(crtc) == 0) {
- drm_crtc_arm_vblank_event(crtc, event);
- } else {
- drm_crtc_send_vblank_event(crtc, event);
- }
- }
- spin_unlock_irq(&crtc->dev->event_lock);
-
- paddr = mxsfb_get_fb_paddr(mxsfb);
- if (paddr) {
- mxsfb_enable_axi_clk(mxsfb);
- writel(paddr, mxsfb->base + mxsfb->devdata->next_buf);
- mxsfb_disable_axi_clk(mxsfb);
- }
-}