[PATCH v2] drm/mcde: Add new driver for ST-Ericsson MCDE
Sam Ravnborg
sam at ravnborg.org
Wed Apr 24 18:42:22 UTC 2019
Hi Linus.
A few repeated comments from last review, and then a bunch
of trivial nits below.
One major thing to consider is to use a regmap for all the register
access.
Another bigger item is the excessive use of logging. Is this relevant
now the driver works or just leftovers which should really be dropped?
> +++ b/drivers/gpu/drm/mcde/mcde_display.c
> @@ -0,0 +1,1292 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2018 Linus Walleij <linus.walleij at linaro.org>
> + * Parts of this file were based on the MCDE driver by Marcus Lorentzon
> + * (C) ST-Ericsson SA 2013
> + */
> +#include <linux/clk.h>
> +#include <linux/version.h>
> +#include <linux/dma-buf.h>
> +#include <linux/of_graph.h>
Sort includes alphabetically
> +
> +#include <drm/drmP.h>
Do not use drmP in new drivers.
> +#include <drm/drm_gem_cma_helper.h>
> +#include <drm/drm_gem_framebuffer_helper.h>
> +#include <drm/drm_fb_cma_helper.h>
> +#include <drm/drm_simple_kms_helper.h>
> +#include <drm/drm_mipi_dsi.h>
> +#include <video/mipi_display.h>
Also sort these alphabetically.
> +#include "mcde_drm.h"
> +
....
> +#define MCDE_DSIVID0DELAY1 0x00000E18
> +#define MCDE_DSICMD0DELAY1 0x00000E38
> +#define MCDE_DSIVID1DELAY1 0x00000E58
> +#define MCDE_DSICMD1DELAY1 0x00000E78
> +#define MCDE_DSIVID2DELAY1 0x00000E98
> +#define MCDE_DSICMD2DELAY1 0x00000EB8
Consider to move all the register definitiosn to a seperate .h
file - local to this driver.
Then the _display, _drv and _dpmi files contains mainly src.
> +void mcde_display_irq(struct mcde *mcde)
> +{
> + u32 mispp, misovl, mischnl;
> + bool vblank;
> +
> + /* Handle display IRQs */
> + mispp = readl(mcde->regs + MCDE_MISPP);
> + misovl = readl(mcde->regs + MCDE_MISOVL);
> + mischnl = readl(mcde->regs + MCDE_MISCHNL);
> +
> + /*
> + * Handle IRQs from the DSI link. All IRQs from the DSI links
> + * are just latched onto the MCDE IRQ line, so we need to traverse
> + * any active DSI masters and check if an IRQ is originating from
> + * them.
> + *
> + * TODO: Currently only one DSI link is supported.
> + */
> + if (mcde_dsi_irq(mcde->mdsi)) {
> + u32 val;
> +
> + /*
> + * In oneshot mode we do not send continuous updates
> + * to the display, instead we only push out updates when
> + * the update function is called, then we disable the
> + * flow on the channel once we get the TE IRQ.
> + */
> + if (mcde->oneshot_mode) {
> + spin_lock(&mcde->flow_lock);
> + if (--mcde->flow_active == 0) {
> + dev_dbg(mcde->dev, "TE0 IRQ\n");
> + /* Disable FIFO A flow */
> + val = readl(mcde->regs + MCDE_CRA0);
> + val &= ~MCDE_CRX0_FLOEN;
> + writel(val, mcde->regs + MCDE_CRA0);
> + }
> + spin_unlock(&mcde->flow_lock);
All the code that deals with flow_active would be better
in a few well-named helper functions.
Then is would be more obvious what is going on.
Also there seems to be a little code duplication
around flow_active later in this patch.
The dev_dbg(...) seems as it can flood the terminal if enabled.
Is it maybe a little to excessive logging?
See below for example.
> + }
> + }
> +
> + /* Vblank from one of the channels */
> + if (mispp & MCDE_PP_VCMPA) {
> + dev_dbg(mcde->dev, "chnl A vblank IRQ\n");
> + vblank = true;
> + }
> + if (mispp & MCDE_PP_VCMPB) {
> + dev_dbg(mcde->dev, "chnl B vblank IRQ\n");
> + vblank = true;
> + }
> + if (mispp & MCDE_PP_VCMPC0)
> + dev_dbg(mcde->dev, "chnl C0 vblank IRQ\n");
> + if (mispp & MCDE_PP_VCMPC1)
> + dev_dbg(mcde->dev, "chnl C1 vblank IRQ\n");
> + if (mispp & MCDE_PP_VSCC0)
> + dev_dbg(mcde->dev, "chnl C0 TE IRQ\n");
> + if (mispp & MCDE_PP_VSCC1)
> + dev_dbg(mcde->dev, "chnl C1 TE IRQ\n");
> + writel(mispp, mcde->regs + MCDE_RISPP);
> +
> + if (vblank)
> + drm_crtc_handle_vblank(&mcde->pipe.crtc);
> +
> + if (misovl)
> + dev_info(mcde->dev, "some stray overlay IRQ %08x\n", misovl);
> + writel(misovl, mcde->regs + MCDE_RISOVL);
> +
> + if (mischnl)
> + dev_info(mcde->dev, "some stray channel error IRQ %08x\n",
> + mischnl);
> + writel(mischnl, mcde->regs + MCDE_RISCHNL);
> +}
> +
> +void mcde_display_disable_irqs(struct mcde *mcde)
> +{
> + /* Disable all IRQs */
> + writel(0, mcde->regs + MCDE_IMSCPP);
> + writel(0, mcde->regs + MCDE_IMSCOVL);
> + writel(0, mcde->regs + MCDE_IMSCCHNL);
> +
> + /* Clear any pending IRQs */
> + writel(0xFFFFFFFF, mcde->regs + MCDE_RISPP);
> + writel(0xFFFFFFFF, mcde->regs + MCDE_RISOVL);
> + writel(0xFFFFFFFF, mcde->regs + MCDE_RISCHNL);
> +}
> +
> +static int mcde_display_check(struct drm_simple_display_pipe *pipe,
> + struct drm_plane_state *pstate,
> + struct drm_crtc_state *cstate)
> +{
> + const struct drm_display_mode *mode = &cstate->mode;
> + struct drm_framebuffer *old_fb = pipe->plane.state->fb;
> + struct drm_framebuffer *fb = pstate->fb;
> +
> + if (fb) {
> + u32 offset = drm_fb_cma_get_gem_addr(fb, pstate, 0);
> +
> + /* FB base address must be dword aligned. */
> + if (offset & 3) {
> + DRM_DEBUG_KMS("FB not 32-bit aligned\n");
> + return -EINVAL;
> + }
> +
> + /*
> + * There's no pitch register, the mode's hdisplay
> + * controls this.
> + */
> + if (fb->pitches[0] != mode->hdisplay * fb->format->cpp[0]) {
> + DRM_DEBUG_KMS("can't handle pitches\n");
> + return -EINVAL;
> + }
> +
> + /*
> + * We can't change the FB format in a flicker-free
> + * manner (and only update it during CRTC enable).
> + */
> + if (old_fb && old_fb->format != fb->format)
> + cstate->mode_changed = true;
> + }
> +
> + return 0;
> +}
> +
> +static int mcde_dsi_get_pkt_div(int ppl, int fifo_size)
> +{
> + /*
> + * DSI command mode line packets should be split into an even number of
> + * packets smaller than or equal to the fifo size.
> + */
> + int div;
> + const int max_div = DIV_ROUND_UP(MCDE_MAX_WIDTH, fifo_size);
> +
> + for (div = 1; div < max_div; div++)
> + if (ppl % div == 0 && ppl / div <= fifo_size)
> + return div;
> + return 1;
> +}
> +
> +static void mcde_display_enable(struct drm_simple_display_pipe *pipe,
> + struct drm_crtc_state *cstate,
> + struct drm_plane_state *plane_state)
> +{
> + struct drm_crtc *crtc = &pipe->crtc;
> + struct drm_plane *plane = &pipe->plane;
> + struct drm_device *drm = crtc->dev;
> + struct mcde *mcde = drm->dev_private;
> + const struct drm_display_mode *mode = &cstate->mode;
> + struct drm_framebuffer *fb = plane->state->fb;
> + u32 format = fb->format->format;
> + u32 formatter_ppl = mode->hdisplay; /* pixels per line */
> + u32 formatter_lpf = mode->vdisplay; /* lines per frame */
> + int pkt_size, fifo_wtrmrk;
> + int cpp = drm_format_plane_cpp(format, 0);
> + int formatter_cpp;
> + struct drm_format_name_buf tmp;
> + u32 formatter_frame;
> + u32 pkt_div;
> + u32 val;
Very long function. Consider to break it up in some well named smaller
chunks.
> +
> + dev_info(drm->dev, "enable MCDE, %d x %d format %s\n",
> + mode->hdisplay, mode->vdisplay,
> + drm_get_format_name(format, &tmp));
> + if (!mcde->mdsi) {
> + /* TODO: deal with this for non-DSI output */
> + dev_err(drm->dev, "no DSI master attached!\n");
> + return;
> + }
> +
> + dev_info(drm->dev, "output in %s mode, format %dbpp\n",
> + (mcde->mdsi->mode_flags & MIPI_DSI_MODE_VIDEO) ?
> + "VIDEO" : "CMD",
> + mipi_dsi_pixel_format_to_bpp(mcde->mdsi->format));
> + formatter_cpp =
> + mipi_dsi_pixel_format_to_bpp(mcde->mdsi->format) / 8;
> + dev_info(drm->dev, "overlay CPP %d bytes, DSI CPP %d bytes\n",
> + cpp,
> + formatter_cpp);
> +
> + /* Calculations from mcde_fmtr_dsi.c, fmtr_dsi_enable_video() */
> +
> + /*
> + * Set up FIFO A watermark level:
> + * 128 for LCD 32bpp video mode
> + * 48 for LCD 32bpp command mode
> + * 128 for LCD 16bpp video mode
> + * 64 for LCD 16bpp command mode
> + * 128 for HDMI 32bpp
> + * 192 for HDMI 16bpp
> + */
> + fifo_wtrmrk = mode->hdisplay;
> + if (mcde->mdsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
> + fifo_wtrmrk = min(fifo_wtrmrk, 128);
> + pkt_div = 1;
> + } else {
> + fifo_wtrmrk = min(fifo_wtrmrk, 48);
> + /* The FIFO is 640 entries deep on this v3 hardware */
> + pkt_div = mcde_dsi_get_pkt_div(mode->hdisplay, 640);
> + }
> + dev_dbg(drm->dev, "FIFO watermark after flooring: %d bytes\n",
> + fifo_wtrmrk);
> + dev_dbg(drm->dev, "Packet divisor: %d bytes\n", pkt_div);
> +
> +
> + /* NOTE: pkt_div is 1 for video mode */
> + pkt_size = (formatter_ppl * formatter_cpp) / pkt_div;
> + /* Commands CMD8 need one extra byte */
> + if (!(mcde->mdsi->mode_flags & MIPI_DSI_MODE_VIDEO))
> + pkt_size++;
> +
> + dev_dbg(drm->dev, "DSI packet size: %d * %d bytes per line\n",
> + pkt_size, pkt_div);
> + dev_dbg(drm->dev, "Overlay frame size: %u bytes\n",
> + mode->hdisplay * mode->vdisplay * cpp);
> + mcde->stride = mode->hdisplay * cpp;
> + dev_dbg(drm->dev, "Overlay line stride: %u bytes\n",
> + mcde->stride);
> + /* NOTE: pkt_div is 1 for video mode */
> + formatter_frame = pkt_size * pkt_div * formatter_lpf;
> + dev_dbg(drm->dev, "Formatter frame size: %u bytes\n", formatter_frame);
> +
> + /* Check that the hardware on channel A is in a sane state */
> + val = readl(mcde->regs + MCDE_CTRLA);
> + if (!(val & MCDE_CTRLX_FIFOEMPTY)) {
> + int timeout = 100;
> +
> + dev_err(drm->dev, "Channel A FIFO not empty (handover)\n");
> + /* Attempt to clear the FIFO */
> + /* Enable FIFO A flow */
> + val = readl(mcde->regs + MCDE_CRA0);
> + val |= MCDE_CRX0_FLOEN;
> + writel(val, mcde->regs + MCDE_CRA0);
> + /* Trigger a software sync out on channel 0 */
> + writel(MCDE_CHNLXSYNCHSW_SW_TRIG,
> + mcde->regs + MCDE_CHNL0SYNCHSW);
> + /* Disable FIFO A flow again */
> + val = readl(mcde->regs + MCDE_CRA0);
> + val &= ~MCDE_CRX0_FLOEN;
> + writel(val, mcde->regs + MCDE_CRA0);
> + while (readl(mcde->regs + MCDE_CRA0) & MCDE_CRX0_FLOEN) {
> + usleep_range(1000, 1500);
> + if (!--timeout) {
> + dev_err(drm->dev,
> + "FIFO A timeout while clearing\n");
> + break;
> + }
> + }
> + }
> +
> + /* Set up FIFO A and channel 0 (based on chnl_update_registers()) */
> +
> + if (mcde->te_sync) {
> + /*
> + * Turn on hardware TE0 synchronization
> + */
> + val = MCDE_CHNLXSYNCHMOD_SRC_SYNCH_HARDWARE
> + << MCDE_CHNLXSYNCHMOD_SRC_SYNCH_SHIFT;
> + val |= MCDE_CHNLXSYNCHMOD_OUT_SYNCH_SRC_TE0
> + << MCDE_CHNLXSYNCHMOD_OUT_SYNCH_SRC_SHIFT;
> + } else {
> + /*
> + * Set up sync source to software, out sync formatter
> + * Code mostly from mcde_hw.c chnl_update_registers()
> + */
> + val = MCDE_CHNLXSYNCHMOD_SRC_SYNCH_SOFTWARE
> + << MCDE_CHNLXSYNCHMOD_SRC_SYNCH_SHIFT;
> + val |= MCDE_CHNLXSYNCHMOD_OUT_SYNCH_SRC_FORMATTER
> + << MCDE_CHNLXSYNCHMOD_OUT_SYNCH_SRC_SHIFT;
> + }
> + writel(val, mcde->regs + MCDE_CHNL0SYNCHMOD);
> +
> + /* Set up FIFO for channel A */
> + val = fifo_wtrmrk << MCDE_CTRLX_FIFOWTRMRK_SHIFT;
> + /* We only support DSI formatting for now */
> + val |= MCDE_CTRLX_FORMTYPE_DSI <<
> + MCDE_CTRLX_FORMTYPE_SHIFT;
> + /* Use formatter 0 for FIFO A */
> + val |= 0 << MCDE_CTRLX_FORMID_SHIFT;
> + writel(val, mcde->regs + MCDE_CTRLA);
> +
> + /* Set up muxing: connect channel 0 to FIFO A */
> + writel(MCDE_CHNLXMUXING_FIFO_ID_FIFO_A,
> + mcde->regs + MCDE_CHNL0MUXING);
> +
> + /* Pixel-per-line and line-per-frame set-up for the channel */
> + val = (mode->hdisplay - 1) << MCDE_CHNLXCONF_PPL_SHIFT;
> + val |= (mode->vdisplay - 1) << MCDE_CHNLXCONF_LPF_SHIFT;
> + writel(val, mcde->regs + MCDE_CHNL0CONF);
> +
> + /*
> + * Normalize color conversion:
> + * black background, OLED conversion disable on channel 0
> + * FIFO A, no rotation.
> + */
> + val = MCDE_CHNLXSTAT_CHNLBLBCKGND_EN |
> + MCDE_CHNLXSTAT_CHNLRD;
> + writel(val, mcde->regs + MCDE_CHNL0STAT);
> + writel(0, mcde->regs + MCDE_CHNL0BCKGNDCOL);
> + /* Blend source with Alpha 0xff on FIFO A */
> + val = MCDE_CRX0_BLENDEN |
> + 0xff << MCDE_CRX0_ALPHABLEND_SHIFT;
> + writel(val, mcde->regs + MCDE_CRA0);
> +
> + /*
> + * Configure external source 0 one buffer (buffer 0)
> + * primary overlay ID 0.
> + * From mcde_hw.c ovly_update_registers() in the vendor tree
> + */
> + val = 0 << MCDE_EXTSRCXCONF_BUF_ID_SHIFT;
> + val |= 1 << MCDE_EXTSRCXCONF_BUF_NB_SHIFT;
> + val |= 0 << MCDE_EXTSRCXCONF_PRI_OVLID_SHIFT;
> + /*
> + * MCDE has inverse semantics from DRM on RBG/BGR which is why
> + * all the modes are inversed here.
> + */
> + switch (format) {
> + case DRM_FORMAT_ARGB8888:
> + val |= MCDE_EXTSRCXCONF_BPP_ARGB8888 <<
> + MCDE_EXTSRCXCONF_BPP_SHIFT;
> + val |= MCDE_EXTSRCXCONF_BGR;
> + break;
> + case DRM_FORMAT_ABGR8888:
> + val |= MCDE_EXTSRCXCONF_BPP_ARGB8888 <<
> + MCDE_EXTSRCXCONF_BPP_SHIFT;
> + break;
> + case DRM_FORMAT_XRGB8888:
> + val |= MCDE_EXTSRCXCONF_BPP_XRGB8888 <<
> + MCDE_EXTSRCXCONF_BPP_SHIFT;
> + val |= MCDE_EXTSRCXCONF_BGR;
> + break;
> + case DRM_FORMAT_XBGR8888:
> + val |= MCDE_EXTSRCXCONF_BPP_XRGB8888 <<
> + MCDE_EXTSRCXCONF_BPP_SHIFT;
> + break;
> + case DRM_FORMAT_RGB888:
> + val |= MCDE_EXTSRCXCONF_BPP_RGB888 <<
> + MCDE_EXTSRCXCONF_BPP_SHIFT;
> + val |= MCDE_EXTSRCXCONF_BGR;
> + break;
> + case DRM_FORMAT_BGR888:
> + val |= MCDE_EXTSRCXCONF_BPP_RGB888 <<
> + MCDE_EXTSRCXCONF_BPP_SHIFT;
> + break;
> + case DRM_FORMAT_ARGB4444:
> + val |= MCDE_EXTSRCXCONF_BPP_ARGB4444 <<
> + MCDE_EXTSRCXCONF_BPP_SHIFT;
> + val |= MCDE_EXTSRCXCONF_BGR;
> + break;
> + case DRM_FORMAT_ABGR4444:
> + val |= MCDE_EXTSRCXCONF_BPP_ARGB4444 <<
> + MCDE_EXTSRCXCONF_BPP_SHIFT;
> + break;
> + case DRM_FORMAT_XRGB4444:
> + val |= MCDE_EXTSRCXCONF_BPP_RGB444 <<
> + MCDE_EXTSRCXCONF_BPP_SHIFT;
> + val |= MCDE_EXTSRCXCONF_BGR;
> + break;
> + case DRM_FORMAT_XBGR4444:
> + val |= MCDE_EXTSRCXCONF_BPP_RGB444 <<
> + MCDE_EXTSRCXCONF_BPP_SHIFT;
> + break;
> + case DRM_FORMAT_XRGB1555:
> + val |= MCDE_EXTSRCXCONF_BPP_IRGB1555 <<
> + MCDE_EXTSRCXCONF_BPP_SHIFT;
> + val |= MCDE_EXTSRCXCONF_BGR;
> + break;
> + case DRM_FORMAT_XBGR1555:
> + val |= MCDE_EXTSRCXCONF_BPP_IRGB1555 <<
> + MCDE_EXTSRCXCONF_BPP_SHIFT;
> + break;
> + case DRM_FORMAT_RGB565:
> + val |= MCDE_EXTSRCXCONF_BPP_RGB565 <<
> + MCDE_EXTSRCXCONF_BPP_SHIFT;
> + val |= MCDE_EXTSRCXCONF_BGR;
> + break;
> + case DRM_FORMAT_BGR565:
> + val |= MCDE_EXTSRCXCONF_BPP_RGB565 <<
> + MCDE_EXTSRCXCONF_BPP_SHIFT;
> + break;
> + case DRM_FORMAT_YUV422:
> + val |= MCDE_EXTSRCXCONF_BPP_YCBCR422 <<
> + MCDE_EXTSRCXCONF_BPP_SHIFT;
> + break;
> + default:
> + dev_err(drm->dev, "Unknown pixel format 0x%08x\n",
> + fb->format->format);
> + break;
> + }
> + writel(val, mcde->regs + MCDE_EXTSRC0CONF);
> + /* Software select, primary */
> + val = MCDE_EXTSRC0CR_SEL_MOD_SOFTWARE_SEL;
> + val |= MCDE_EXTSRC0CR_MULTIOVL_CTRL_PRIMARY;
> + writel(val, mcde->regs + MCDE_EXTSRC0CR);
> +
> + /* Configure overlay 0 */
> + val = mode->hdisplay << MCDE_OVLXCONF_PPL_SHIFT;
> + val |= mode->vdisplay << MCDE_OVLXCONF_LPF_SHIFT;
> + /* Use external source 0 that we just configured */
> + val |= 0 << MCDE_OVLXCONF_EXTSRC_ID_SHIFT;
> + writel(val, mcde->regs + MCDE_OVL0CONF);
> +
> + val = MCDE_OVLXCONF2_BP_PER_PIXEL_ALPHA;
> + val |= 0xff << MCDE_OVLXCONF2_ALPHAVALUE_SHIFT;
> + /* OPQ: overlay is opaque */
> + switch (format) {
> + case DRM_FORMAT_ARGB8888:
> + case DRM_FORMAT_ABGR8888:
> + case DRM_FORMAT_ARGB4444:
> + case DRM_FORMAT_ABGR4444:
> + case DRM_FORMAT_XRGB1555:
> + case DRM_FORMAT_XBGR1555:
> + /* No OPQ */
> + break;
> + case DRM_FORMAT_XRGB8888:
> + case DRM_FORMAT_XBGR8888:
> + case DRM_FORMAT_RGB888:
> + case DRM_FORMAT_BGR888:
> + case DRM_FORMAT_RGB565:
> + case DRM_FORMAT_BGR565:
> + case DRM_FORMAT_YUV422:
> + val |= MCDE_OVLXCONF2_OPQ;
> + break;
> + default:
> + dev_err(drm->dev, "Unknown pixel format 0x%08x\n",
> + fb->format->format);
> + break;
> + }
> + /* The default watermark level for overlay 0 is 48 */
> + val |= 48 << MCDE_OVLXCONF2_PIXELFETCHERWATERMARKLEVEL_SHIFT;
> + writel(val, mcde->regs + MCDE_OVL0CONF2);
> +
> + /* Number of bytes to fetch per line */
> + writel(mcde->stride, mcde->regs + MCDE_OVL0LJINC);
> + /* No cropping */
> + writel(0, mcde->regs + MCDE_OVL0CROP);
> +
> + /* Set up overlay control register */
> + val = MCDE_OVLXCR_OVLEN;
> + val |= MCDE_OVLXCR_COLCCTRL_DISABLED;
> + val |= MCDE_OVLXCR_BURSTSIZE_8W <<
> + MCDE_OVLXCR_BURSTSIZE_SHIFT;
> + val |= MCDE_OVLXCR_MAXOUTSTANDING_8_REQ <<
> + MCDE_OVLXCR_MAXOUTSTANDING_SHIFT;
> + /* Not using rotation but set it up anyways */
> + val |= MCDE_OVLXCR_ROTBURSTSIZE_8W <<
> + MCDE_OVLXCR_ROTBURSTSIZE_SHIFT;
> + writel(val, mcde->regs + MCDE_OVL0CR);
> +
> + /* Set-up from mcde_fmtr_dsi.c, fmtr_dsi_enable_video() */
> +
> + /* Channel formatter set-up for channel A */
> + val = MCDE_CRX1_CLKSEL_MCDECLK << MCDE_CRX1_CLKSEL_SHIFT;
> + /* TODO: when adding DPI support add OUTBPP etc here */
> + writel(val, mcde->regs + MCDE_CRA1);
> +
> + /*
> + * Enable formatter
> + * 8 bit commands and DCS commands (notgen = not generic)
> + */
> + val = MCDE_DSICONF0_CMD8 | MCDE_DSICONF0_DCSVID_NOTGEN;
> + if (mcde->mdsi->mode_flags & MIPI_DSI_MODE_VIDEO)
> + val |= MCDE_DSICONF0_VID_MODE_VID;
> + switch (mcde->mdsi->format) {
> + case MIPI_DSI_FMT_RGB888:
> + val |= MCDE_DSICONF0_PACKING_RGB888 <<
> + MCDE_DSICONF0_PACKING_SHIFT;
> + break;
> + case MIPI_DSI_FMT_RGB666:
> + val |= MCDE_DSICONF0_PACKING_RGB666 <<
> + MCDE_DSICONF0_PACKING_SHIFT;
> + break;
> + case MIPI_DSI_FMT_RGB666_PACKED:
> + val |= MCDE_DSICONF0_PACKING_RGB666_PACKED <<
> + MCDE_DSICONF0_PACKING_SHIFT;
> + break;
> + case MIPI_DSI_FMT_RGB565:
> + val |= MCDE_DSICONF0_PACKING_RGB565 <<
> + MCDE_DSICONF0_PACKING_SHIFT;
> + break;
> + default:
> + dev_err(drm->dev, "unknown DSI format\n");
> + return;
> + }
> + writel(val, mcde->regs + MCDE_DSIVID0CONF0);
> +
> + writel(formatter_frame, mcde->regs + MCDE_DSIVID0FRAME);
> + writel(pkt_size, mcde->regs + MCDE_DSIVID0PKT);
> + writel(0, mcde->regs + MCDE_DSIVID0SYNC);
> + /* Define the MIPI command: we want to write into display memory */
> + val = MIPI_DCS_WRITE_MEMORY_CONTINUE <<
> + MCDE_DSIVIDXCMDW_CMDW_CONTINUE_SHIFT;
> + val |= MIPI_DCS_WRITE_MEMORY_START <<
> + MCDE_DSIVIDXCMDW_CMDW_START_SHIFT;
> + writel(val, mcde->regs + MCDE_DSIVID0CMDW);
> + /*
> + * FIXME: the vendor driver has some hack around this value in
> + * CMD mode with autotrig.
> + */
> + writel(0, mcde->regs + MCDE_DSIVID0DELAY0);
> + writel(0, mcde->regs + MCDE_DSIVID0DELAY1);
> +
> + if (mcde->te_sync) {
> + if (mode->flags & DRM_MODE_FLAG_NVSYNC)
> + val = MCDE_VSCRC_VSPOL;
> + else
> + val = 0;
> + writel(val, mcde->regs + MCDE_VSCRC0);
> + /* Enable VSYNC capture on TE0 */
> + val = readl(mcde->regs + MCDE_CRC);
> + val |= MCDE_CRC_SYCEN0;
> + writel(val, mcde->regs + MCDE_CRC);
> +
> + drm_crtc_vblank_on(crtc);
> + }
> +
> + dev_info(drm->dev, "MCDE display is enabled\n");
> + mcde->enabled = true;
> +}
> +
> +static void mcde_display_disable(struct drm_simple_display_pipe *pipe)
> +{
> + struct drm_crtc *crtc = &pipe->crtc;
> + struct drm_device *drm = crtc->dev;
> + struct mcde *mcde = drm->dev_private;
> + int timeout = 100;
> + u32 val;
> +
> + /* Stops framebuffer updates */
> + mcde->enabled = false;
> +
> + if (mcde->te_sync)
> + drm_crtc_vblank_off(crtc);
> +
> + /* Disable FIFO A flow */
> + val = readl(mcde->regs + MCDE_CRA0);
> + val &= ~MCDE_CRX0_FLOEN;
> + writel(val, mcde->regs + MCDE_CRA0);
> + while (readl(mcde->regs + MCDE_CRA0) & MCDE_CRX0_FLOEN) {
> + usleep_range(1000, 1500);
> + if (!--timeout) {
> + dev_err(drm->dev,
> + "FIFO A timeout while stopping\n");
> + break;
> + }
> + }
Here I recall regmap has something similar implmented.
So another good reason to use regmap.
> + spin_lock(&mcde->flow_lock);
> + mcde->flow_active = 0;
> + spin_unlock(&mcde->flow_lock);
> +
> + dev_info(drm->dev, "MCDE display is disabled\n");
> +}
> +
> +static void mcde_display_send_one_frame(struct mcde *mcde)
> +{
> + int timeout = 100;
> + u32 val;
> +
> + /* Request a TE ACK */
> + if (mcde->te_sync)
> + mcde_dsi_te_request(mcde->mdsi);
> +
> + /* Enable FIFO A flow */
> + spin_lock(&mcde->flow_lock);
> + val = readl(mcde->regs + MCDE_CRA0);
> + val |= MCDE_CRX0_FLOEN;
> + writel(val, mcde->regs + MCDE_CRA0);
> + mcde->flow_active++;
> + spin_unlock(&mcde->flow_lock);
> +
> + if (mcde->te_sync) {
> + /*
> + * If oneshot mode is enabled, the flow will be disabled
> + * when the TE0 IRQ arrives in the interrupt handler. Otherwise
> + * updates are continuously streamed to the display after this
> + * point.
> + */
> + dev_info(mcde->dev, "sent TE0 framebuffer update\n");
> + return;
> + }
> +
> + /* Trigger a software sync out on channel 0 */
> + writel(MCDE_CHNLXSYNCHSW_SW_TRIG,
> + mcde->regs + MCDE_CHNL0SYNCHSW);
> + /* Disable FIFO A flow again */
> + spin_lock(&mcde->flow_lock);
> + val = readl(mcde->regs + MCDE_CRA0);
> + val &= ~MCDE_CRX0_FLOEN;
> + writel(val, mcde->regs + MCDE_CRA0);
> + mcde->flow_active = 0;
> + spin_unlock(&mcde->flow_lock);
> +
> + /*
> + * At this point the DSI link should be running a
> + * frame update.
> + */
> + while (readl(mcde->regs + MCDE_CRA0) & MCDE_CRX0_FLOEN) {
> + usleep_range(1000, 1500);
> + if (!--timeout) {
> + dev_err(mcde->dev, "FIFO A timeout\n");
> + break;
> + }
> + }
> + dev_dbg(mcde->dev, "sent SW framebuffer update\n");
> +}
> +
> +static void mcde_set_extsrc(struct mcde *mcde, u32 buffer_address)
> +{
> + /* Write bitmap base address to register */
> + writel(buffer_address, mcde->regs + MCDE_EXTSRCXA0);
> + /*
> + * Base address for next line this is probably only used
> + * in interlace modes.
> + */
> + writel(buffer_address + mcde->stride, mcde->regs + MCDE_EXTSRCXA1);
> +
> + /* Set up overlay 0 compositor route to channel A */
> + writel(0, mcde->regs + MCDE_OVL0COMP);
> +}
> +
> +static void mcde_display_update(struct drm_simple_display_pipe *pipe,
> + struct drm_plane_state *old_pstate)
> +{
> + struct drm_crtc *crtc = &pipe->crtc;
> + struct drm_device *drm = crtc->dev;
> + struct mcde *mcde = drm->dev_private;
> + struct drm_pending_vblank_event *event = crtc->state->event;
> + struct drm_plane *plane = &pipe->plane;
> + struct drm_plane_state *pstate = plane->state;
> + struct drm_framebuffer *fb = pstate->fb;
> +
> + /*
> + * We do not start sending framebuffer updates before the
> + * display is enabled. Update events will however be dispatched
> + * from the DRM core before the display is enabled.
> + */
> + if (fb && mcde->enabled) {
> + mcde_set_extsrc(mcde, drm_fb_cma_get_gem_addr(fb, pstate, 0));
> + /* Send a single frame using software sync */
> + mcde_display_send_one_frame(mcde);
> + } else {
> + /*
> + * If an update is receieved before the MCDE is enabled
> + * (before mcde_display_enable() is called) we can't really
> + * do much with that buffer.
> + */
> + dev_info(mcde->dev, "ignored a display update\n");
> + }
> +
> + /* Handle any pending event */
> + if (event) {
> + crtc->state->event = NULL;
> +
> + spin_lock_irq(&crtc->dev->event_lock);
> + /*
> + * Hardware must be on before we can arm any vblank event,
> + * this is not a scanout controller where there is always
> + * some periodic update going on, it is completely frozen
> + * until we get an update. If MCDE output isn't yet enabled,
> + * we just send a vblank dummy event back.
> + */
> + if (crtc->state->active && drm_crtc_vblank_get(crtc) == 0 &&
> + mcde->enabled && mcde->vblank_irq_on) {
> + dev_dbg(mcde->dev, "arm vblank event\n");
> + drm_crtc_arm_vblank_event(crtc, event);
> + } else {
> + dev_dbg(mcde->dev, "insert fake vblank event\n");
> + drm_crtc_send_vblank_event(crtc, event);
> + }
> +
> + spin_unlock_irq(&crtc->dev->event_lock);
> + }
> +}
> +
> +static int mcde_display_enable_vblank(struct drm_simple_display_pipe *pipe)
> +{
> + struct drm_crtc *crtc = &pipe->crtc;
> + struct drm_device *drm = crtc->dev;
> + struct mcde *mcde = drm->dev_private;
> + u32 val;
> +
> + /* Enable all VBLANK IRQs */
> + val = MCDE_PP_VCMPA |
> + MCDE_PP_VCMPB |
> + MCDE_PP_VSCC0 |
> + MCDE_PP_VSCC1 |
> + MCDE_PP_VCMPC0 |
> + MCDE_PP_VCMPC1;
> + writel(val, mcde->regs + MCDE_IMSCPP);
> + mcde->vblank_irq_on = true;
> +
> + return 0;
> +}
> +
> +static void mcde_display_disable_vblank(struct drm_simple_display_pipe *pipe)
> +{
> + struct drm_crtc *crtc = &pipe->crtc;
> + struct drm_device *drm = crtc->dev;
> + struct mcde *mcde = drm->dev_private;
> +
> + /* Disable all VBLANK IRQs */
> + writel(0, mcde->regs + MCDE_IMSCPP);
> + /* Clear any pending IRQs */
> + writel(0xFFFFFFFF, mcde->regs + MCDE_RISPP);
> + mcde->vblank_irq_on = false;
> +}
> +
> +static int mcde_display_prepare_fb(struct drm_simple_display_pipe *pipe,
> + struct drm_plane_state *plane_state)
> +{
> + return drm_gem_fb_prepare_fb(&pipe->plane, plane_state);
> +}
> +
> +static struct drm_simple_display_pipe_funcs mcde_display_funcs = {
> + .check = mcde_display_check,
> + .enable = mcde_display_enable,
> + .disable = mcde_display_disable,
> + .update = mcde_display_update,
> + .prepare_fb = mcde_display_prepare_fb,
> +};
> +
> +int mcde_display_init(struct drm_device *drm)
> +{
> + struct mcde *mcde = drm->dev_private;
> + int ret;
> + static const u32 formats[] = {
> + DRM_FORMAT_ARGB8888,
> + DRM_FORMAT_ABGR8888,
> + DRM_FORMAT_XRGB8888,
> + DRM_FORMAT_XBGR8888,
> + DRM_FORMAT_RGB888,
> + DRM_FORMAT_BGR888,
> + DRM_FORMAT_ARGB4444,
> + DRM_FORMAT_ABGR4444,
> + DRM_FORMAT_XRGB4444,
> + DRM_FORMAT_XBGR4444,
> + /* These are actually IRGB1555 so intensity bit is lost */
> + DRM_FORMAT_XRGB1555,
> + DRM_FORMAT_XBGR1555,
> + DRM_FORMAT_RGB565,
> + DRM_FORMAT_BGR565,
> + DRM_FORMAT_YUV422,
> + };
> +
> + /* Provide vblank only when we have TE enabled */
> + if (mcde->te_sync) {
> + mcde_display_funcs.enable_vblank = mcde_display_enable_vblank;
> + mcde_display_funcs.disable_vblank = mcde_display_disable_vblank;
> + }
> +
> + ret = drm_simple_display_pipe_init(drm, &mcde->pipe,
> + &mcde_display_funcs,
> + formats, ARRAY_SIZE(formats),
> + NULL,
> + mcde->connector);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(mcde_display_init);
> diff --git a/drivers/gpu/drm/mcde/mcde_drm.h b/drivers/gpu/drm/mcde/mcde_drm.h
> new file mode 100644
> index 000000000000..8c04665ebcfc
> --- /dev/null
> +++ b/drivers/gpu/drm/mcde/mcde_drm.h
> @@ -0,0 +1,47 @@
> +/* SPDX-License-Identifier: GPL-2.0+ */
> +/*
> + * Copyright (C) 2018 Linus Walleij <linus.walleij at linaro.org>
> + * Parts of this file were based on the MCDE driver by Marcus Lorentzon
> + * (C) ST-Ericsson SA 2013
> + */
> +#include <drm/drm_simple_kms_helper.h>
> +
> +#ifndef _MCDE_DRM_H_
> +#define _MCDE_DRM_H_
> +
> +struct mcde {
> + struct device *dev;
> +
> + struct drm_device *drm;
Consider to embed drm_device.
Se sample code in drm_drv.c - in drm-misc-next branch.
This will also teach you not to use devm_kzalloc and to start using
.release callback.
> + struct drm_panel *panel;
> + struct drm_bridge *bridge;
> + struct drm_connector *connector;
> + struct drm_simple_display_pipe pipe;
> + struct mipi_dsi_device *mdsi;
> + s16 stride;
> + bool enabled;
> + bool vblank_irq_on;
> + bool te_sync;
> + bool oneshot_mode;
> + unsigned int flow_active;
> + spinlock_t flow_lock; /* Locks the channel flow control */
> +
> + void __iomem *regs;
> +
> + struct clk *mcde_clk;
> + struct clk *lcd_clk;
> + struct clk *hdmi_clk;
> +
> + struct regulator *epod;
> + struct regulator *vana;
> +};
> +
> +bool mcde_dsi_irq(struct mipi_dsi_device *mdsi);
> +void mcde_dsi_te_request(struct mipi_dsi_device *mdsi);
> +extern struct platform_driver mcde_dsi_driver;
> +
> +void mcde_display_irq(struct mcde *mcde);
> +void mcde_display_disable_irqs(struct mcde *mcde);
> +int mcde_display_init(struct drm_device *drm);
> +
> +#endif /* _MCDE_DRM_H_ */
> diff --git a/drivers/gpu/drm/mcde/mcde_drv.c b/drivers/gpu/drm/mcde/mcde_drv.c
> new file mode 100644
> index 000000000000..1630289a7faa
> --- /dev/null
> +++ b/drivers/gpu/drm/mcde/mcde_drv.c
> @@ -0,0 +1,540 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2018 Linus Walleij <linus.walleij at linaro.org>
> + * Parts of this file were based on the MCDE driver by Marcus Lorentzon
> + * (C) ST-Ericsson SA 2013
> + */
> +
> +/**
> + * DOC: ST-Ericsson MCDE Driver
> + *
> + * The MCDE (short for Multi-channel display engine) is a graphics
> + * controller found in the Ux500 chipsets, such as NovaThor U8500.
> + * It was initially conceptualized by ST Microelectronics for the
> + * successor of the Nomadik line, STn8500 but productified in the
> + * ST-Ericsson U8500 where is was used for mass-market deployments
> + * in Android phones from Samsung and Sony Ericsson.
> + *
> + * It can do 1080p30 on SDTV CCIR656, DPI-2, DBI-2 or DSI for
> + * panels with or without frame buffering and can convert most
> + * input formats including most variants of RGB and YUV.
> + *
> + * The hardware has four display pipes, and the layout is a little
> + * bit like this:
> + *
> + * Memory -> 6 channels -> 5 formatters -> DSI/DPI -> LCD/HDMI
> + * 10 sources (overlays) 3 x DSI
> + *
> + * The memory has 5 input channels (memory ports):
> + * 2 channel A (LCD/HDMI)
> + * 2 channel B (LCD/HDMI)
> + * 1 channel CO/C1 (Panel with embedded buffer)
> + *
> + * 3 of the formatters are for DSI
> + * 2 of the formatters are for DPI
> + *
> + * Behind the formatters are the DSI or DPI ports, that route to
> + * the external pins of the chip. As there are 3 DSI ports and one
> + * DPI port, it is possible to configure up to 4 display pipelines.
> + *
> + * In the current DRM/KMS setup, we use one channel and one formatter
> + * which we connect to the simple CMA framebuffer helpers. We then
> + * provide a bridge to the DSI port, and on the DSI port bridge we
> + * connect hang a panel bridge or other bridge. This may be subject
> + * to change as we exploit more of the hardware capabilities.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/regulator/consumer.h>
> +#include <linux/dma-buf.h>
> +#include <linux/irq.h>
> +#include <linux/io.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/of_platform.h>
> +#include <linux/slab.h>
> +#include <linux/component.h>
> +
> +#include <drm/drmP.h>
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_crtc_helper.h>
> +#include <drm/drm_gem.h>
> +#include <drm/drm_gem_cma_helper.h>
> +#include <drm/drm_gem_framebuffer_helper.h>
> +#include <drm/drm_fb_helper.h>
> +#include <drm/drm_fb_cma_helper.h>
> +#include <drm/drm_probe_helper.h>
> +#include <drm/drm_panel.h>
> +#include <drm/drm_of.h>
> +#include <drm/drm_bridge.h>
Samme comments as before on include files (sort, drop drmP.h)
> +
> +#include "mcde_drm.h"
> +
> +#define DRIVER_DESC "DRM module for MCDE"
> +
> +#define MCDE_CR 0x00000000
> +#define MCDE_CR_IFIFOEMPTYLINECOUNT_V422_SHIFT 0
> +#define MCDE_CR_IFIFOEMPTYLINECOUNT_V422_MASK 0x0000003F
> +#define MCDE_CR_IFIFOCTRLEN BIT(15)
> +#define MCDE_CR_UFRECOVERY_MODE_V422 BIT(16)
> +#define MCDE_CR_WRAP_MODE_V422_SHIFT BIT(17)
> +#define MCDE_CR_AUTOCLKG_EN BIT(30)
> +#define MCDE_CR_MCDEEN BIT(31)
> +
> +#define MCDE_CONF0 0x00000004
> +#define MCDE_CONF0_SYNCMUX0 BIT(0)
> +#define MCDE_CONF0_SYNCMUX1 BIT(1)
> +#define MCDE_CONF0_SYNCMUX2 BIT(2)
> +#define MCDE_CONF0_SYNCMUX3 BIT(3)
> +#define MCDE_CONF0_SYNCMUX4 BIT(4)
> +#define MCDE_CONF0_SYNCMUX5 BIT(5)
> +#define MCDE_CONF0_SYNCMUX6 BIT(6)
> +#define MCDE_CONF0_SYNCMUX7 BIT(7)
> +#define MCDE_CONF0_IFIFOCTRLWTRMRKLVL_SHIFT 12
> +#define MCDE_CONF0_IFIFOCTRLWTRMRKLVL_MASK 0x00007000
> +#define MCDE_CONF0_OUTMUX0_SHIFT 16
> +#define MCDE_CONF0_OUTMUX0_MASK 0x00070000
> +#define MCDE_CONF0_OUTMUX1_SHIFT 19
> +#define MCDE_CONF0_OUTMUX1_MASK 0x00380000
> +#define MCDE_CONF0_OUTMUX2_SHIFT 22
> +#define MCDE_CONF0_OUTMUX2_MASK 0x01C00000
> +#define MCDE_CONF0_OUTMUX3_SHIFT 25
> +#define MCDE_CONF0_OUTMUX3_MASK 0x0E000000
> +#define MCDE_CONF0_OUTMUX4_SHIFT 28
> +#define MCDE_CONF0_OUTMUX4_MASK 0x70000000
> +
> +#define MCDE_SSP 0x00000008
> +#define MCDE_AIS 0x00000100
> +#define MCDE_IMSCERR 0x00000110
> +#define MCDE_RISERR 0x00000120
> +#define MCDE_MISERR 0x00000130
> +#define MCDE_SISERR 0x00000140
> +
> +#define MCDE_PID 0x000001FC
> +#define MCDE_PID_METALFIX_VERSION_SHIFT 0
> +#define MCDE_PID_METALFIX_VERSION_MASK 0x000000FF
> +#define MCDE_PID_DEVELOPMENT_VERSION_SHIFT 8
> +#define MCDE_PID_DEVELOPMENT_VERSION_MASK 0x0000FF00
> +#define MCDE_PID_MINOR_VERSION_SHIFT 16
> +#define MCDE_PID_MINOR_VERSION_MASK 0x00FF0000
> +#define MCDE_PID_MAJOR_VERSION_SHIFT 24
> +#define MCDE_PID_MAJOR_VERSION_MASK 0xFF000000
Likewise on register definitions => separate file?
> +
> +static const struct drm_mode_config_funcs mode_config_funcs = {
> + .fb_create = drm_gem_fb_create,
> + .atomic_check = drm_atomic_helper_check,
> + .atomic_commit = drm_atomic_helper_commit,
> +};
> +
> +static irqreturn_t mcde_irq(int irq, void *data)
> +{
> + struct mcde *mcde = data;
> + u32 val;
> +
> + val = readl(mcde->regs + MCDE_MISERR);
> +
> + mcde_display_irq(mcde);
> +
> + if (val)
> + dev_info(mcde->dev, "some error IRQ\n");
> + writel(val, mcde->regs + MCDE_RISERR);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static int mcde_modeset_init(struct drm_device *drm)
> +{
> + struct drm_mode_config *mode_config;
> + struct mcde *mcde = drm->dev_private;
> + int ret;
> +
> + if (!mcde->bridge) {
> + dev_err(drm->dev, "no display output bridge yet\n");
> + return -EPROBE_DEFER;
> + }
> +
> + mode_config = &drm->mode_config;
> + mode_config->funcs = &mode_config_funcs;
> + /* This hardware can do 1080p */
> + mode_config->min_width = 1;
> + mode_config->max_width = 1920;
> + mode_config->min_height = 1;
> + mode_config->max_height = 1080;
> +
> + /*
> + * Currently we only support vblank handling on the DSI bridge, using
> + * TE synchronization. If TE sync is not set up, it is still possible
> + * to push out a single update on demand, but this is hard for DRM to
> + * exploit.
> + */
> + if (mcde->te_sync) {
> + ret = drm_vblank_init(drm, 1);
> + if (ret) {
> + dev_err(drm->dev, "failed to init vblank\n");
> + goto out_config;
> + }
> + }
> +
> + ret = mcde_display_init(drm);
> + if (ret) {
> + dev_err(drm->dev, "failed to init display\n");
> + goto out_config;
> + }
> +
> + /*
> + * Attach the DSI bridge
> + *
> + * TODO: when adding support for the DPI bridge or several DSI bridges,
> + * we selectively connect the bridge(s) here instead of this simple
> + * attachment.
> + */
> + ret = drm_simple_display_pipe_attach_bridge(&mcde->pipe,
> + mcde->bridge);
> + if (ret) {
> + dev_err(drm->dev, "failed to attach display output bridge\n");
> + goto out_config;
> + }
> +
> + drm_mode_config_reset(drm);
> + drm_kms_helper_poll_init(drm);
> + drm_fbdev_generic_setup(drm, 32);
> +
> + return 0;
> +
> +out_config:
> + drm_mode_config_cleanup(drm);
> + return ret;
> +}
> +
> +DEFINE_DRM_GEM_CMA_FOPS(drm_fops);
> +
> +static struct drm_driver mcde_drm_driver = {
> + .driver_features =
> + DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME | DRIVER_ATOMIC,
> + .lastclose = drm_fb_helper_lastclose,
> + .ioctls = NULL,
> + .fops = &drm_fops,
> + .name = "mcde",
> + .desc = DRIVER_DESC,
> + .date = "20180529",
> + .major = 1,
> + .minor = 0,
> + .patchlevel = 0,
> + .dumb_create = drm_gem_cma_dumb_create,
> + .gem_free_object_unlocked = drm_gem_cma_free_object,
> + .gem_vm_ops = &drm_gem_cma_vm_ops,
> +
> + .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
> + .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
> + .gem_prime_import = drm_gem_prime_import,
> + .gem_prime_export = drm_gem_prime_export,
> + .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
> + .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
> + .gem_prime_vmap = drm_gem_cma_prime_vmap,
> + .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
> + .gem_prime_mmap = drm_gem_cma_prime_mmap,
> +};
> +
> +static int mcde_drm_bind(struct device *dev)
> +{
> + struct drm_device *drm = dev_get_drvdata(dev);
> + int ret;
> +
> + drm_mode_config_init(drm);
> +
> + ret = component_bind_all(drm->dev, drm);
> + if (ret) {
> + dev_err(dev, "can't bind component devices\n");
> + return ret;
> + }
> +
> + ret = mcde_modeset_init(drm);
> + if (ret)
> + goto unbind;
> +
> + ret = drm_dev_register(drm, 0);
> + if (ret < 0)
> + goto unbind;
> +
> + return 0;
> +
> +unbind:
> + component_unbind_all(drm->dev, drm);
> + return ret;
> +}
> +
> +static void mcde_drm_unbind(struct device *dev)
> +{
> + struct drm_device *drm = dev_get_drvdata(dev);
> +
> + drm_dev_unregister(drm);
> + component_unbind_all(drm->dev, drm);
> + drm_mode_config_cleanup(drm);
> +}
> +
> +static const struct component_master_ops mcde_drm_comp_ops = {
> + .bind = mcde_drm_bind,
> + .unbind = mcde_drm_unbind,
> +};
> +
> +static struct platform_driver *const mcde_component_drivers[] = {
> + &mcde_dsi_driver,
> +};
> +
> +static int mcde_compare_dev(struct device *dev, void *data)
> +{
> + return dev == data;
> +}
> +
> +static int mcde_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct drm_device *drm;
> + struct mcde *mcde;
> + struct component_match *match;
> + struct resource *res;
> + u32 pid;
> + u32 val;
> + int irq;
> + int ret;
> + int i;
> +
> + mcde = devm_kzalloc(dev, sizeof(*mcde), GFP_KERNEL);
> + if (!mcde)
> + return -ENOMEM;
> + mcde->dev = dev;
> +
> + drm = drm_dev_alloc(&mcde_drm_driver, dev);
> + if (IS_ERR(drm))
> + return PTR_ERR(drm);
> + platform_set_drvdata(pdev, drm);
> + mcde->drm = drm;
> + /* Enable use of the TE signal and interrupt */
> + mcde->te_sync = true;
> + /* Enable continuous updates: this is what Linux' framebuffer expects */
> + mcde->oneshot_mode = false;
> + drm->dev_private = mcde;
> +
> + /* First obtain and turn on the main power */
> + mcde->epod = devm_regulator_get(dev, "epod");
> + if (IS_ERR(mcde->epod)) {
> + ret = PTR_ERR(mcde->epod);
> + dev_err(dev, "can't get EPOD regulator\n");
Print error code.
> + goto dev_unref;
> + }
> + ret = regulator_enable(mcde->epod);
> + if (ret) {
> + dev_err(dev, "can't enable EPOD regulator\n");
Print error code.
> + goto dev_unref;
> + }
> + mcde->vana = devm_regulator_get(dev, "vana");
> + if (IS_ERR(mcde->vana)) {
> + ret = PTR_ERR(mcde->vana);
> + dev_err(dev, "can't get VANA regulator\n");
Print error code.
> + goto regulator_epod_off;
> + }
> + ret = regulator_enable(mcde->vana);
> + if (ret) {
> + dev_err(dev, "can't enable VANA regulator\n");
Print error code.
> + goto regulator_epod_off;
> + }
> + /*
> + * The vendor code uses ESRAM (onchip RAM) and need to activate
> + * the v-esram34 regulator, but we don't use that yet
> + */
> +
> + /* Clock the silicon so we can access the registers */
> + mcde->mcde_clk = devm_clk_get(dev, "mcde");
> + if (IS_ERR(mcde->mcde_clk)) {
> + dev_err(dev, "unable to get MCDE main clock\n");
Print error code.
> + ret = PTR_ERR(mcde->mcde_clk);
> + goto regulator_off;
> + }
> + ret = clk_prepare_enable(mcde->mcde_clk);
> + if (ret) {
> + dev_err(dev, "failed to enable MCDE main clock\n");
Print error code.
> + goto regulator_off;
> + }
> + dev_info(dev, "MCDE clk rate %lu Hz\n", clk_get_rate(mcde->mcde_clk));
> +
> + mcde->lcd_clk = devm_clk_get(dev, "lcd");
> + if (IS_ERR(mcde->lcd_clk)) {
> + dev_err(dev, "unable to get LCD clock\n");
Print error code.
> + ret = PTR_ERR(mcde->lcd_clk);
> + goto clk_disable;
> + }
> + mcde->hdmi_clk = devm_clk_get(dev, "hdmi");
> + if (IS_ERR(mcde->hdmi_clk)) {
> + dev_err(dev, "unable to get HDMI clock\n");
Print error code.
> + ret = PTR_ERR(mcde->hdmi_clk);
> + goto clk_disable;
> + }
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + mcde->regs = devm_ioremap_resource(dev, res);
> + if (IS_ERR(mcde->regs)) {
> + dev_err(dev, "no MCDE regs\n");
Print error code.
> + ret = -EINVAL;
> + goto clk_disable;
> + }
> +
> + irq = platform_get_irq(pdev, 0);
> + if (!irq) {
> + ret = -EINVAL;
> + goto clk_disable;
> + }
> +
> + ret = devm_request_irq(dev, irq, mcde_irq, 0, "mcde", mcde);
> + if (ret) {
> + dev_err(dev, "failed to request irq %d\n", ret);
> + goto clk_disable;
> + }
> +
> + /*
> + * Check hardware revision, we only support U8500v2 version
> + * as this was the only version used for mass market deployment,
> + * but surely you can add more versions if you have them and
> + * need them.
> + */
> + pid = readl(mcde->regs + MCDE_PID);
> + dev_info(dev, "found MCDE HW revision %d.%d (dev %d, metal fix %d)\n",
> + (pid & MCDE_PID_MAJOR_VERSION_MASK)
> + >> MCDE_PID_MAJOR_VERSION_SHIFT,
> + (pid & MCDE_PID_MINOR_VERSION_MASK)
> + >> MCDE_PID_MINOR_VERSION_SHIFT,
> + (pid & MCDE_PID_DEVELOPMENT_VERSION_MASK)
> + >> MCDE_PID_DEVELOPMENT_VERSION_SHIFT,
> + (pid & MCDE_PID_METALFIX_VERSION_MASK)
> + >> MCDE_PID_METALFIX_VERSION_SHIFT);
> + if (pid != 0x03000800) {
> + dev_err(dev, "unsupported hardware revision\n");
> + ret = -ENODEV;
> + goto clk_disable;
> + }
> +
> + /* Set up the main control, watermark level at 7 */
> + val = 7 << MCDE_CONF0_IFIFOCTRLWTRMRKLVL_SHIFT;
> + /* 24 bits DPI: connect LSB Ch B to D[0:7] */
> + val |= 3 << MCDE_CONF0_OUTMUX0_SHIFT;
> + /* TV out: connect LSB Ch B to D[8:15] */
> + val |= 3 << MCDE_CONF0_OUTMUX1_SHIFT;
> + /* Don't care about this muxing */
> + val |= 0 << MCDE_CONF0_OUTMUX2_SHIFT;
> + /* 24 bits DPI: connect MID Ch B to D[24:31] */
> + val |= 4 << MCDE_CONF0_OUTMUX3_SHIFT;
> + /* 5: 24 bits DPI: connect MSB Ch B to D[32:39] */
> + val |= 5 << MCDE_CONF0_OUTMUX4_SHIFT;
> + /* Syncmux bits zero: DPI channel A and B on output pins A and B resp */
> + writel(val, mcde->regs + MCDE_CONF0);
> +
> + /* Enable automatic clock gating */
> + val = readl(mcde->regs + MCDE_CR);
> + val |= MCDE_CR_MCDEEN | MCDE_CR_AUTOCLKG_EN;
> + writel(val, mcde->regs + MCDE_CR);
> +
> + /* Clear any pending interrupts */
> + mcde_display_disable_irqs(mcde);
> + writel(0, mcde->regs + MCDE_IMSCERR);
> + writel(0xFFFFFFFF, mcde->regs + MCDE_RISERR);
> +
> + /* Spawn child devices for the DSI ports */
> + devm_of_platform_populate(dev);
> +
> + /* Create something that will match the subdrivers when we bind */
I could not follow what this parts does.
Maybe move to function and document this?
> + for (i = 0; i < ARRAY_SIZE(mcde_component_drivers); i++) {
> + struct device_driver *drv = &mcde_component_drivers[i]->driver;
> + struct device *p = NULL, *d;
> +
> + while ((d = bus_find_device(&platform_bus_type, p, drv,
> + (void *)platform_bus_type.match))) {
> + put_device(p);
> + component_match_add(dev, &match, mcde_compare_dev, d);
> + p = d;
> + }
> + put_device(p);
> + }
> + if (IS_ERR(match)) {
> + dev_err(dev, "could not create component match\n");
> + ret = PTR_ERR(match);
> + goto clk_disable;
> + }
> + ret = component_master_add_with_match(&pdev->dev, &mcde_drm_comp_ops,
> + match);
> + if (ret) {
> + dev_err(dev, "failed to add component master\n");
> + goto clk_disable;
> + }
> + return 0;
> +
> +clk_disable:
> + clk_disable_unprepare(mcde->mcde_clk);
> +regulator_off:
> + regulator_disable(mcde->vana);
> +regulator_epod_off:
> + regulator_disable(mcde->epod);
> +dev_unref:
> + drm_dev_put(drm);
> + return ret;
> +
> +}
> +
> +static int mcde_remove(struct platform_device *pdev)
> +{
> + struct drm_device *drm = platform_get_drvdata(pdev);
> + struct mcde *mcde = drm->dev_private;
> +
> + component_master_del(&pdev->dev, &mcde_drm_comp_ops);
> + clk_disable_unprepare(mcde->mcde_clk);
What about the other clocks?
> + regulator_disable(mcde->vana);
> + regulator_disable(mcde->epod);
> + drm_dev_put(drm);
> +
> + return 0;
> +}
> +
> +static const struct of_device_id mcde_of_match[] = {
> + {
> + .compatible = "ste,mcde",
> + },
> + {},
Add /* sentinel */ like most other drivers do.
> +};
> +
> +static struct platform_driver mcde_driver = {
> + .driver = {
> + .name = "mcde",
> + .of_match_table = of_match_ptr(mcde_of_match),
> + },
> + .probe = mcde_probe,
> + .remove = mcde_remove,
> +};
> +
> +static struct platform_driver *const component_drivers[] = {
> + &mcde_dsi_driver,
> +};
> +
> +static int __init mcde_drm_register(void)
> +{
> + int ret;
> +
> + ret = platform_register_drivers(component_drivers,
> + ARRAY_SIZE(component_drivers));
> + if (ret)
> + return ret;
> +
> + return platform_driver_register(&mcde_driver);
> +}
> +
> +static void __exit mcde_drm_unregister(void)
> +{
> + platform_unregister_drivers(component_drivers,
> + ARRAY_SIZE(component_drivers));
> + platform_driver_unregister(&mcde_driver);
> +}
> +
> +module_init(mcde_drm_register);
> +module_exit(mcde_drm_unregister);
> +
> +MODULE_ALIAS("platform:mcde-drm");
> +MODULE_DESCRIPTION(DRIVER_DESC);
> +MODULE_AUTHOR("Linus Walleij <linus.walleij at linaro.org>");
> +MODULE_LICENSE("GPL");
> diff --git a/drivers/gpu/drm/mcde/mcde_dsi.c b/drivers/gpu/drm/mcde/mcde_dsi.c
> new file mode 100644
> index 000000000000..52b95c356753
> --- /dev/null
> +++ b/drivers/gpu/drm/mcde/mcde_dsi.c
> @@ -0,0 +1,1424 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +#include <linux/platform_device.h>
> +#include <linux/module.h>
> +#include <linux/clk.h>
> +#include <linux/regulator/consumer.h>
> +#include <linux/io.h>
> +#include <linux/delay.h>
> +#include <linux/component.h>
> +#include <linux/of.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/regmap.h>
> +#include <video/mipi_display.h>
Sort
> +
> +#include <drm/drm_device.h>
> +#include <drm/drm_drv.h>
> +#include <drm/drm_encoder.h>
> +#include <drm/drm_modeset_helper_vtables.h>
> +#include <drm/drm_panel.h>
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_probe_helper.h>
> +#include <drm/drm_crtc_helper.h>
> +#include <drm/drm_mipi_dsi.h>
> +#include <drm/drm_print.h>
> +#include <drm/drm_bridge.h>
> +#include <drm/drm_of.h>
Sort.
Do you really need all these .h files?
> +
> +#include "mcde_drm.h"
> +
> +#define DSI_DEFAULT_LP_FREQ_HZ 19200000
> +#define DSI_DEFAULT_HS_FREQ_HZ 420160000
> +
> +#define DSI_MCTL_INTEGRATION_MODE 0x00000000
> +
> +#define DSI_MCTL_MAIN_DATA_CTL 0x00000004
> +#define DSI_MCTL_MAIN_DATA_CTL_LINK_EN BIT(0)
> +#define DSI_MCTL_MAIN_DATA_CTL_IF1_MODE BIT(1)
> +#define DSI_MCTL_MAIN_DATA_CTL_VID_EN BIT(2)
> +#define DSI_MCTL_MAIN_DATA_CTL_TVG_SEL BIT(3)
> +#define DSI_MCTL_MAIN_DATA_CTL_TBG_SEL BIT(4)
> +#define DSI_MCTL_MAIN_DATA_CTL_IF1_TE_EN BIT(5)
> +#define DSI_MCTL_MAIN_DATA_CTL_IF2_TE_EN BIT(6)
> +#define DSI_MCTL_MAIN_DATA_CTL_REG_TE_EN BIT(7)
> +#define DSI_MCTL_MAIN_DATA_CTL_READ_EN BIT(8)
> +#define DSI_MCTL_MAIN_DATA_CTL_BTA_EN BIT(9)
> +#define DSI_MCTL_MAIN_DATA_CTL_DISP_GEN_ECC BIT(10)
> +#define DSI_MCTL_MAIN_DATA_CTL_DISP_GEN_CHECKSUM BIT(11)
> +#define DSI_MCTL_MAIN_DATA_CTL_HOST_EOT_GEN BIT(12)
> +#define DSI_MCTL_MAIN_DATA_CTL_DISP_EOT_GEN BIT(13)
> +#define DSI_MCTL_MAIN_DATA_CTL_DLX_REMAP_EN BIT(14)
> +#define DSI_MCTL_MAIN_DATA_CTL_TE_POLLING_EN BIT(15)
> +
> +#define DSI_MCTL_MAIN_PHY_CTL 0x00000008
> +#define DSI_MCTL_MAIN_PHY_CTL_LANE2_EN BIT(0)
> +#define DSI_MCTL_MAIN_PHY_CTL_FORCE_STOP_MODE BIT(1)
> +#define DSI_MCTL_MAIN_PHY_CTL_CLK_CONTINUOUS BIT(2)
> +#define DSI_MCTL_MAIN_PHY_CTL_CLK_ULPM_EN BIT(3)
> +#define DSI_MCTL_MAIN_PHY_CTL_DAT1_ULPM_EN BIT(4)
> +#define DSI_MCTL_MAIN_PHY_CTL_DAT2_ULPM_EN BIT(5)
> +#define DSI_MCTL_MAIN_PHY_CTL_WAIT_BURST_TIME_SHIFT 6
> +#define DSI_MCTL_MAIN_PHY_CTL_WAIT_BURST_TIME_MASK 0x000003C0
> +#define DSI_MCTL_MAIN_PHY_CTL_CLOCK_FORCE_STOP_MODE BIT(10)
> +
> +#define DSI_MCTL_PLL_CTL 0x0000000C
> +#define DSI_MCTL_LANE_STS 0x00000010
> +
> +#define DSI_MCTL_DPHY_TIMEOUT 0x00000014
> +#define DSI_MCTL_DPHY_TIMEOUT_CLK_DIV_SHIFT 0
> +#define DSI_MCTL_DPHY_TIMEOUT_CLK_DIV_MASK 0x0000000F
> +#define DSI_MCTL_DPHY_TIMEOUT_HSTX_TO_VAL_SHIFT 4
> +#define DSI_MCTL_DPHY_TIMEOUT_HSTX_TO_VAL_MASK 0x0003FFF0
> +#define DSI_MCTL_DPHY_TIMEOUT_LPRX_TO_VAL_SHIFT 18
> +#define DSI_MCTL_DPHY_TIMEOUT_LPRX_TO_VAL_MASK 0xFFFC0000
> +
> +#define DSI_MCTL_ULPOUT_TIME 0x00000018
> +#define DSI_MCTL_ULPOUT_TIME_CKLANE_ULPOUT_TIME_SHIFT 0
> +#define DSI_MCTL_ULPOUT_TIME_CKLANE_ULPOUT_TIME_MASK 0x000001FF
> +#define DSI_MCTL_ULPOUT_TIME_DATA_ULPOUT_TIME_SHIFT 9
> +#define DSI_MCTL_ULPOUT_TIME_DATA_ULPOUT_TIME_MASK 0x0003FE00
> +
> +#define DSI_MCTL_DPHY_STATIC 0x0000001C
> +#define DSI_MCTL_DPHY_STATIC_SWAP_PINS_CLK BIT(0)
> +#define DSI_MCTL_DPHY_STATIC_HS_INVERT_CLK BIT(1)
> +#define DSI_MCTL_DPHY_STATIC_SWAP_PINS_DAT1 BIT(2)
> +#define DSI_MCTL_DPHY_STATIC_HS_INVERT_DAT1 BIT(3)
> +#define DSI_MCTL_DPHY_STATIC_SWAP_PINS_DAT2 BIT(4)
> +#define DSI_MCTL_DPHY_STATIC_HS_INVERT_DAT2 BIT(5)
> +#define DSI_MCTL_DPHY_STATIC_UI_X4_SHIFT 6
> +#define DSI_MCTL_DPHY_STATIC_UI_X4_MASK 0x00000FC0
> +
> +#define DSI_MCTL_MAIN_EN 0x00000020
> +#define DSI_MCTL_MAIN_EN_PLL_START BIT(0)
> +#define DSI_MCTL_MAIN_EN_CKLANE_EN BIT(3)
> +#define DSI_MCTL_MAIN_EN_DAT1_EN BIT(4)
> +#define DSI_MCTL_MAIN_EN_DAT2_EN BIT(5)
> +#define DSI_MCTL_MAIN_EN_CLKLANE_ULPM_REQ BIT(6)
> +#define DSI_MCTL_MAIN_EN_DAT1_ULPM_REQ BIT(7)
> +#define DSI_MCTL_MAIN_EN_DAT2_ULPM_REQ BIT(8)
> +#define DSI_MCTL_MAIN_EN_IF1_EN BIT(9)
> +#define DSI_MCTL_MAIN_EN_IF2_EN BIT(10)
> +
> +#define DSI_MCTL_MAIN_STS 0x00000024
> +#define DSI_MCTL_MAIN_STS_PLL_LOCK BIT(0)
> +#define DSI_MCTL_MAIN_STS_CLKLANE_READY BIT(1)
> +#define DSI_MCTL_MAIN_STS_DAT1_READY BIT(2)
> +#define DSI_MCTL_MAIN_STS_DAT2_READY BIT(3)
> +#define DSI_MCTL_MAIN_STS_HSTX_TO_ERR BIT(4)
> +#define DSI_MCTL_MAIN_STS_LPRX_TO_ERR BIT(5)
> +#define DSI_MCTL_MAIN_STS_CRS_UNTERM_PCK BIT(6)
> +#define DSI_MCTL_MAIN_STS_VRS_UNTERM_PCK BIT(7)
> +
> +#define DSI_MCTL_DPHY_ERR 0x00000028
> +#define DSI_INT_VID_RDDATA 0x00000030
> +#define DSI_INT_VID_GNT 0x00000034
> +#define DSI_INT_CMD_RDDATA 0x00000038
> +#define DSI_INT_CMD_GNT 0x0000003C
> +#define DSI_INT_INTERRUPT_CTL 0x00000040
> +
> +#define DSI_CMD_MODE_CTL 0x00000050
> +#define DSI_CMD_MODE_CTL_IF1_ID_SHIFT 0
> +#define DSI_CMD_MODE_CTL_IF1_ID_MASK 0x00000003
> +#define DSI_CMD_MODE_CTL_IF2_ID_SHIFT 2
> +#define DSI_CMD_MODE_CTL_IF2_ID_MASK 0x0000000C
> +#define DSI_CMD_MODE_CTL_IF1_LP_EN BIT(4)
> +#define DSI_CMD_MODE_CTL_IF2_LP_EN BIT(5)
> +#define DSI_CMD_MODE_CTL_ARB_MODE BIT(6)
> +#define DSI_CMD_MODE_CTL_ARB_PRI BIT(7)
> +#define DSI_CMD_MODE_CTL_FIL_VALUE_SHIFT 8
> +#define DSI_CMD_MODE_CTL_FIL_VALUE_MASK 0x0000FF00
> +#define DSI_CMD_MODE_CTL_TE_TIMEOUT_SHIFT 16
> +#define DSI_CMD_MODE_CTL_TE_TIMEOUT_MASK 0x03FF0000
> +
> +#define DSI_CMD_MODE_STS 0x00000054
> +#define DSI_CMD_MODE_STS_ERR_NO_TE BIT(0)
> +#define DSI_CMD_MODE_STS_ERR_TE_MISS BIT(1)
> +#define DSI_CMD_MODE_STS_ERR_SDI1_UNDERRUN BIT(2)
> +#define DSI_CMD_MODE_STS_ERR_SDI2_UNDERRUN BIT(3)
> +#define DSI_CMD_MODE_STS_ERR_UNWANTED_RD BIT(4)
> +#define DSI_CMD_MODE_STS_CSM_RUNNING BIT(5)
> +
> +#define DSI_DIRECT_CMD_SEND 0x00000060
> +
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS 0x00000064
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_NAT_SHIFT 0
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_NAT_MASK 0x00000007
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_NAT_WRITE 0
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_NAT_READ 1
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_NAT_TE_REQ 4
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_NAT_TRIG_REQ 5
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_NAT_BTA_REQ 6
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_LONGNOTSHORT BIT(3)
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_HEAD_SHIFT 8
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_HEAD_MASK 0x00003F00
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_HEAD_TURN_ON_PERIPHERAL 50
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_HEAD_SHUT_DOWN_PERIPHERAL 34
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_HEAD_GENERIC_SHORT_WRITE_0 3
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_HEAD_GENERIC_SHORT_WRITE_1 19
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_HEAD_GENERIC_SHORT_WRITE_2 35
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_HEAD_GENERIC_LONG_WRITE 41
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_HEAD_DCS_SHORT_WRITE_0 5
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_HEAD_DCS_SHORT_WRITE_1 21
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_HEAD_DCS_LONG_WRITE 57
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_HEAD_DCS_READ 6
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_HEAD_SET_MAX_PKT_SIZE 55
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_ID_SHIFT 14
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_SIZE_SHIFT 16
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_CMD_LP_EN BIT(21)
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_TRIGGER_VAL_SHIFT 24
> +#define DSI_DIRECT_CMD_MAIN_SETTINGS_TRIGGER_VAL_MASK 0x0F000000
> +
> +#define DSI_DIRECT_CMD_STS 0x00000068
> +#define DSI_DIRECT_CMD_STS_CMD_TRANSMISSION BIT(0)
> +#define DSI_DIRECT_CMD_STS_WRITE_COMPLETED BIT(1)
> +#define DSI_DIRECT_CMD_STS_TRIGGER_COMPLETED BIT(2)
> +#define DSI_DIRECT_CMD_STS_READ_COMPLETED BIT(3)
> +#define DSI_DIRECT_CMD_STS_ACKNOWLEDGE_RECEIVED_SHIFT BIT(4)
> +#define DSI_DIRECT_CMD_STS_ACKNOWLEDGE_WITH_ERR_RECEIVED BIT(5)
> +#define DSI_DIRECT_CMD_STS_TRIGGER_RECEIVED BIT(6)
> +#define DSI_DIRECT_CMD_STS_TE_RECEIVED BIT(7)
> +#define DSI_DIRECT_CMD_STS_BTA_COMPLETED BIT(8)
> +#define DSI_DIRECT_CMD_STS_BTA_FINISHED BIT(9)
> +#define DSI_DIRECT_CMD_STS_READ_COMPLETED_WITH_ERR BIT(10)
> +#define DSI_DIRECT_CMD_STS_TRIGGER_VAL_MASK 0x00007800
> +#define DSI_DIRECT_CMD_STS_TRIGGER_VAL_SHIFT 11
> +#define DSI_DIRECT_CMD_STS_ACK_VAL_SHIFT 16
> +#define DSI_DIRECT_CMD_STS_ACK_VAL_MASK 0xFFFF0000
> +
> +#define DSI_DIRECT_CMD_RD_INIT 0x0000006C
> +#define DSI_DIRECT_CMD_RD_INIT_RESET_SHIFT 0
> +#define DSI_DIRECT_CMD_RD_INIT_RESET_MASK 0xFFFFFFFF
> +
> +#define DSI_DIRECT_CMD_WRDAT0 0x00000070
> +#define DSI_DIRECT_CMD_WRDAT1 0x00000074
> +#define DSI_DIRECT_CMD_WRDAT2 0x00000078
> +#define DSI_DIRECT_CMD_WRDAT3 0x0000007C
> +
> +#define DSI_DIRECT_CMD_RDDAT 0x00000080
> +
> +#define DSI_DIRECT_CMD_RD_PROPERTY 0x00000084
> +#define DSI_DIRECT_CMD_RD_PROPERTY_RD_SIZE_SHIFT 0
> +#define DSI_DIRECT_CMD_RD_PROPERTY_RD_SIZE_MASK 0x0000FFFF
> +#define DSI_DIRECT_CMD_RD_PROPERTY_RD_ID_SHIFT 16
> +#define DSI_DIRECT_CMD_RD_PROPERTY_RD_ID_MASK 0x00030000
> +#define DSI_DIRECT_CMD_RD_PROPERTY_RD_DCSNOTGENERIC_SHIFT 18
> +#define DSI_DIRECT_CMD_RD_PROPERTY_RD_DCSNOTGENERIC_MASK 0x00040000
> +
> +#define DSI_DIRECT_CMD_RD_STS 0x00000088
> +
> +#define DSI_VID_MAIN_CTL 0x00000090
> +#define DSI_VID_MAIN_CTL_START_MODE_SHIFT 0
> +#define DSI_VID_MAIN_CTL_START_MODE_MASK 0x00000003
> +#define DSI_VID_MAIN_CTL_STOP_MODE_SHIFT 2
> +#define DSI_VID_MAIN_CTL_STOP_MODE_MASK 0x0000000C
> +#define DSI_VID_MAIN_CTL_VID_ID_SHIFT 4
> +#define DSI_VID_MAIN_CTL_VID_ID_MASK 0x00000030
> +#define DSI_VID_MAIN_CTL_HEADER_SHIFT 6
> +#define DSI_VID_MAIN_CTL_HEADER_MASK 0x00000FC0
> +#define DSI_VID_MAIN_CTL_VID_PIXEL_MODE_16BITS 0
> +#define DSI_VID_MAIN_CTL_VID_PIXEL_MODE_18BITS BIT(12)
> +#define DSI_VID_MAIN_CTL_VID_PIXEL_MODE_18BITS_LOOSE BIT(13)
> +#define DSI_VID_MAIN_CTL_VID_PIXEL_MODE_24BITS (BIT(12) | BIT(13))
> +#define DSI_VID_MAIN_CTL_BURST_MODE BIT(14)
> +#define DSI_VID_MAIN_CTL_SYNC_PULSE_ACTIVE BIT(15)
> +#define DSI_VID_MAIN_CTL_SYNC_PULSE_HORIZONTAL BIT(16)
> +#define DSI_VID_MAIN_CTL_REG_BLKLINE_MODE_NULL 0
> +#define DSI_VID_MAIN_CTL_REG_BLKLINE_MODE_BLANKING BIT(17)
> +#define DSI_VID_MAIN_CTL_REG_BLKLINE_MODE_LP_0 BIT(18)
> +#define DSI_VID_MAIN_CTL_REG_BLKLINE_MODE_LP_1 (BIT(17) | BIT(18))
> +#define DSI_VID_MAIN_CTL_REG_BLKEOL_MODE_NULL 0
> +#define DSI_VID_MAIN_CTL_REG_BLKEOL_MODE_BLANKING BIT(19)
> +#define DSI_VID_MAIN_CTL_REG_BLKEOL_MODE_LP_0 BIT(20)
> +#define DSI_VID_MAIN_CTL_REG_BLKEOL_MODE_LP_1 (BIT(19) | BIT(20))
> +#define DSI_VID_MAIN_CTL_RECOVERY_MODE_SHIFT 21
> +#define DSI_VID_MAIN_CTL_RECOVERY_MODE_MASK 0x00600000
> +
> +#define DSI_VID_VSIZE 0x00000094
> +#define DSI_VID_VSIZE_VSA_LENGTH_SHIFT 0
> +#define DSI_VID_VSIZE_VSA_LENGTH_MASK 0x0000003F
> +#define DSI_VID_VSIZE_VBP_LENGTH_SHIFT 6
> +#define DSI_VID_VSIZE_VBP_LENGTH_MASK 0x00000FC0
> +#define DSI_VID_VSIZE_VFP_LENGTH_SHIFT 12
> +#define DSI_VID_VSIZE_VFP_LENGTH_MASK 0x000FF000
> +#define DSI_VID_VSIZE_VACT_LENGTH_SHIFT 20
> +#define DSI_VID_VSIZE_VACT_LENGTH_MASK 0x7FF00000
> +
> +#define DSI_VID_HSIZE1 0x00000098
> +#define DSI_VID_HSIZE1_HSA_LENGTH_SHIFT 0
> +#define DSI_VID_HSIZE1_HSA_LENGTH_MASK 0x000003FF
> +#define DSI_VID_HSIZE1_HBP_LENGTH_SHIFT 10
> +#define DSI_VID_HSIZE1_HBP_LENGTH_MASK 0x000FFC00
> +#define DSI_VID_HSIZE1_HFP_LENGTH_SHIFT 20
> +#define DSI_VID_HSIZE1_HFP_LENGTH_MASK 0x7FF00000
> +
> +#define DSI_VID_HSIZE2 0x0000009C
> +#define DSI_VID_HSIZE2_RGB_SIZE_SHIFT 0
> +#define DSI_VID_HSIZE2_RGB_SIZE_MASK 0x00001FFF
> +
> +#define DSI_VID_BLKSIZE1 0x000000A0
> +#define DSI_VID_BLKSIZE1_BLKLINE_EVENT_PCK_SHIFT 0
> +#define DSI_VID_BLKSIZE1_BLKLINE_EVENT_PCK_MASK 0x00001FFF
> +#define DSI_VID_BLKSIZE1_BLKEOL_PCK_SHIFT 13
> +#define DSI_VID_BLKSIZE1_BLKEOL_PCK_MASK 0x03FFE000
> +
> +#define DSI_VID_BLKSIZE2 0x000000A4
> +#define DSI_VID_BLKSIZE2_BLKLINE_PULSE_PCK_SHIFT 0
> +#define DSI_VID_BLKSIZE2_BLKLINE_PULSE_PCK_MASK 0x00001FFF
> +
> +#define DSI_VID_PCK_TIME 0x000000A8
> +#define DSI_VID_PCK_TIME_BLKEOL_DURATION_SHIFT 0
> +
> +#define DSI_VID_DPHY_TIME 0x000000AC
> +#define DSI_VID_DPHY_TIME_REG_LINE_DURATION_SHIFT 0
> +#define DSI_VID_DPHY_TIME_REG_LINE_DURATION_MASK 0x00001FFF
> +#define DSI_VID_DPHY_TIME_REG_WAKEUP_TIME_SHIFT 13
> +#define DSI_VID_DPHY_TIME_REG_WAKEUP_TIME_MASK 0x00FFE000
> +
> +#define DSI_VID_MODE_STS 0x000000BC
> +#define DSI_VID_MODE_STS_VSG_RUNNING BIT(0)
> +
> +#define DSI_VID_VCA_SETTING1 0x000000C0
> +#define DSI_VID_VCA_SETTING1_MAX_BURST_LIMIT_SHIFT 0
> +#define DSI_VID_VCA_SETTING1_MAX_BURST_LIMIT_MASK 0x0000FFFF
> +#define DSI_VID_VCA_SETTING1_BURST_LP BIT(16)
> +
> +#define DSI_VID_VCA_SETTING2 0x000000C4
> +#define DSI_VID_VCA_SETTING2_EXACT_BURST_LIMIT_SHIFT 0
> +#define DSI_VID_VCA_SETTING2_EXACT_BURST_LIMIT_MASK 0x0000FFFF
> +#define DSI_VID_VCA_SETTING2_MAX_LINE_LIMIT_SHIFT 16
> +#define DSI_VID_VCA_SETTING2_MAX_LINE_LIMIT_MASK 0xFFFF0000
> +
> +#define DSI_CMD_MODE_STS_CTL 0x000000F4
> +#define DSI_CMD_MODE_STS_CTL_ERR_NO_TE_EN BIT(0)
> +#define DSI_CMD_MODE_STS_CTL_ERR_TE_MISS_EN BIT(1)
> +#define DSI_CMD_MODE_STS_CTL_ERR_SDI1_UNDERRUN_EN BIT(2)
> +#define DSI_CMD_MODE_STS_CTL_ERR_SDI2_UNDERRUN_EN BIT(3)
> +#define DSI_CMD_MODE_STS_CTL_ERR_UNWANTED_RD_EN BIT(4)
> +#define DSI_CMD_MODE_STS_CTL_CSM_RUNNING_EN BIT(5)
> +#define DSI_CMD_MODE_STS_CTL_ERR_NO_TE_EDGE BIT(16)
> +#define DSI_CMD_MODE_STS_CTL_ERR_TE_MISS_EDGE BIT(17)
> +#define DSI_CMD_MODE_STS_CTL_ERR_SDI1_UNDERRUN_EDGE BIT(18)
> +#define DSI_CMD_MODE_STS_CTL_ERR_SDI2_UNDERRUN_EDGE BIT(19)
> +#define DSI_CMD_MODE_STS_CTL_ERR_UNWANTED_RD_EDGE BIT(20)
> +#define DSI_CMD_MODE_STS_CTL_CSM_RUNNING_EDGE BIT(21)
> +
> +#define DSI_DIRECT_CMD_STS_CTL 0x000000F8
> +#define DSI_DIRECT_CMD_STS_CTL_CMD_TRANSMISSION_EN BIT(0)
> +#define DSI_DIRECT_CMD_STS_CTL_WRITE_COMPLETED_EN BIT(1)
> +#define DSI_DIRECT_CMD_STS_CTL_TRIGGER_COMPLETED_EN BIT(2)
> +#define DSI_DIRECT_CMD_STS_CTL_READ_COMPLETED_EN BIT(3)
> +#define DSI_DIRECT_CMD_STS_CTL_ACKNOWLEDGE_RECEIVED_EN BIT(4)
> +#define DSI_DIRECT_CMD_STS_CTL_ACKNOWLEDGE_WITH_ERR_EN BIT(5)
> +#define DSI_DIRECT_CMD_STS_CTL_TRIGGER_RECEIVED_EN BIT(6)
> +#define DSI_DIRECT_CMD_STS_CTL_TE_RECEIVED_EN BIT(7)
> +#define DSI_DIRECT_CMD_STS_CTL_BTA_COMPLETED_EN BIT(8)
> +#define DSI_DIRECT_CMD_STS_CTL_BTA_FINISHED_EN BIT(9)
> +#define DSI_DIRECT_CMD_STS_CTL_READ_COMPLETED_WITH_ERR_EN BIT(10)
> +#define DSI_DIRECT_CMD_STS_CTL_CMD_TRANSMISSION_EDGE BIT(16)
> +#define DSI_DIRECT_CMD_STS_CTL_WRITE_COMPLETED_EDGE BIT(17)
> +#define DSI_DIRECT_CMD_STS_CTL_TRIGGER_COMPLETED_EDGE BIT(18)
> +#define DSI_DIRECT_CMD_STS_CTL_READ_COMPLETED_EDGE BIT(19)
> +#define DSI_DIRECT_CMD_STS_CTL_ACKNOWLEDGE_RECEIVED_EDGE BIT(20)
> +#define DSI_DIRECT_CMD_STS_CTL_ACKNOWLEDGE_WITH_ERR_EDGE BIT(21)
> +#define DSI_DIRECT_CMD_STS_CTL_TRIGGER_RECEIVED_EDGE BIT(22)
> +#define DSI_DIRECT_CMD_STS_CTL_TE_RECEIVED_EDGE BIT(23)
> +#define DSI_DIRECT_CMD_STS_CTL_BTA_COMPLETED_EDGE BIT(24)
> +#define DSI_DIRECT_CMD_STS_CTL_BTA_FINISHED_EDGE BIT(25)
> +#define DSI_DIRECT_CMD_STS_CTL_READ_COMPLETED_WITH_ERR_EDGE BIT(26)
> +
> +#define DSI_VID_MODE_STS_CTL 0x00000100
> +#define DSI_VID_MODE_STS_CTL_VSG_RUNNING BIT(0)
> +#define DSI_VID_MODE_STS_CTL_ERR_MISSING_DATA BIT(1)
> +#define DSI_VID_MODE_STS_CTL_ERR_MISSING_HSYNC BIT(2)
> +#define DSI_VID_MODE_STS_CTL_ERR_MISSING_VSYNC BIT(3)
> +#define DSI_VID_MODE_STS_CTL_REG_ERR_SMALL_LENGTH BIT(4)
> +#define DSI_VID_MODE_STS_CTL_REG_ERR_SMALL_HEIGHT BIT(5)
> +#define DSI_VID_MODE_STS_CTL_ERR_BURSTWRITE BIT(6)
> +#define DSI_VID_MODE_STS_CTL_ERR_LONGWRITE BIT(7)
> +#define DSI_VID_MODE_STS_CTL_ERR_LONGREAD BIT(8)
> +#define DSI_VID_MODE_STS_CTL_ERR_VRS_WRONG_LENGTH BIT(9)
> +#define DSI_VID_MODE_STS_CTL_VSG_RUNNING_EDGE BIT(16)
> +#define DSI_VID_MODE_STS_CTL_ERR_MISSING_DATA_EDGE BIT(17)
> +#define DSI_VID_MODE_STS_CTL_ERR_MISSING_HSYNC_EDGE BIT(18)
> +#define DSI_VID_MODE_STS_CTL_ERR_MISSING_VSYNC_EDGE BIT(19)
> +#define DSI_VID_MODE_STS_CTL_REG_ERR_SMALL_LENGTH_EDGE BIT(20)
> +#define DSI_VID_MODE_STS_CTL_REG_ERR_SMALL_HEIGHT_EDGE BIT(21)
> +#define DSI_VID_MODE_STS_CTL_ERR_BURSTWRITE_EDGE BIT(22)
> +#define DSI_VID_MODE_STS_CTL_ERR_LONGWRITE_EDGE BIT(23)
> +#define DSI_VID_MODE_STS_CTL_ERR_LONGREAD_EDGE BIT(24)
> +#define DSI_VID_MODE_STS_CTL_ERR_VRS_WRONG_LENGTH_EDGE BIT(25)
> +#define DSI_VID_MODE_STS_CTL_VSG_RECOVERY_EDGE BIT(26)
> +
> +#define DSI_TG_STS_CTL 0x00000104
> +#define DSI_MCTL_DHPY_ERR_CTL 0x00000108
> +#define DSI_MCTL_MAIN_STS_CLR 0x00000110
> +
> +#define DSI_CMD_MODE_STS_CLR 0x00000114
> +#define DSI_CMD_MODE_STS_CLR_ERR_NO_TE_CLR BIT(0)
> +#define DSI_CMD_MODE_STS_CLR_ERR_TE_MISS_CLR BIT(1)
> +#define DSI_CMD_MODE_STS_CLR_ERR_SDI1_UNDERRUN_CLR BIT(2)
> +#define DSI_CMD_MODE_STS_CLR_ERR_SDI2_UNDERRUN_CLR BIT(3)
> +#define DSI_CMD_MODE_STS_CLR_ERR_UNWANTED_RD_CLR BIT(4)
> +#define DSI_CMD_MODE_STS_CLR_CSM_RUNNING_CLR BIT(5)
> +
> +#define DSI_DIRECT_CMD_STS_CLR 0x00000118
> +#define DSI_DIRECT_CMD_STS_CLR_CMD_TRANSMISSION_CLR BIT(0)
> +#define DSI_DIRECT_CMD_STS_CLR_WRITE_COMPLETED_CLR BIT(1)
> +#define DSI_DIRECT_CMD_STS_CLR_TRIGGER_COMPLETED_CLR BIT(2)
> +#define DSI_DIRECT_CMD_STS_CLR_READ_COMPLETED_CLR BIT(3)
> +#define DSI_DIRECT_CMD_STS_CLR_ACKNOWLEDGE_RECEIVED_CLR BIT(4)
> +#define DSI_DIRECT_CMD_STS_CLR_ACKNOWLEDGE_WITH_ERR_RECEIVED_CLR BIT(5)
> +#define DSI_DIRECT_CMD_STS_CLR_TRIGGER_RECEIVED_CLR BIT(6)
> +#define DSI_DIRECT_CMD_STS_CLR_TE_RECEIVED_CLR BIT(7)
> +#define DSI_DIRECT_CMD_STS_CLR_BTA_COMPLETED_CLR BIT(8)
> +#define DSI_DIRECT_CMD_STS_CLR_BTA_FINISHED_CLR BIT(9)
> +#define DSI_DIRECT_CMD_STS_CLR_READ_COMPLETED_WITH_ERR_CLR BIT(10)
> +
> +#define DSI_DIRECT_CMD_RD_STS_CLR 0x0000011C
> +#define DSI_VID_MODE_STS_CLR 0x00000120
> +#define DSI_TG_STS_CLR 0x00000124
> +#define DSI_MCTL_DPHY_ERR_CLR 0x00000128
> +#define DSI_MCTL_MAIN_STS_FLAG 0x00000130
> +#define DSI_CMD_MODE_STS_FLAG 0x00000134
> +#define DSI_DIRECT_CMD_STS_FLAG 0x00000138
> +#define DSI_DIRECT_CMD_RD_STS_FLAG 0x0000013C
> +#define DSI_VID_MODE_STS_FLAG 0x00000140
> +#define DSI_TG_STS_FLAG 0x00000144
> +
> +#define DSI_DPHY_LANES_TRIM 0x00000150
> +#define DSI_DPHY_LANES_TRIM_DPHY_SKEW_DAT1_SHIFT 0
> +#define DSI_DPHY_LANES_TRIM_DPHY_SKEW_DAT1_MASK 0x00000003
> +#define DSI_DPHY_LANES_TRIM_DPHY_CD_OFF_DAT1 BIT(2)
> +#define DSI_DPHY_LANES_TRIM_DPHY_HSTX_SLEWRATE_UP_DAT1 BIT(3)
> +#define DSI_DPHY_LANES_TRIM_DPHY_HSTX_SLEWRATE_DOWN_DAT1 BIT(4)
> +#define DSI_DPHY_LANES_TRIM_DPHY_TEST_RESERVED_1_DAT1 BIT(5)
> +#define DSI_DPHY_LANES_TRIM_DPHY_SKEW_CLK_SHIFT 6
> +#define DSI_DPHY_LANES_TRIM_DPHY_SKEW_CLK_MASK 0x000000C0
> +#define DSI_DPHY_LANES_TRIM_DPHY_LP_RX_VIL_CLK_SHIFT 8
> +#define DSI_DPHY_LANES_TRIM_DPHY_LP_RX_VIL_CLK_MASK 0x00000300
> +#define DSI_DPHY_LANES_TRIM_DPHY_LP_TX_SLEWRATE_CLK_SHIFT 10
> +#define DSI_DPHY_LANES_TRIM_DPHY_LP_TX_SLEWRATE_CLK_MASK 0x00000C00
> +#define DSI_DPHY_LANES_TRIM_DPHY_SPECS_90_81B_0_81 0
> +#define DSI_DPHY_LANES_TRIM_DPHY_SPECS_90_81B_0_90 BIT(12)
> +#define DSI_DPHY_LANES_TRIM_DPHY_HSTX_SLEWRATE_UP_CLK BIT(13)
> +#define DSI_DPHY_LANES_TRIM_DPHY_HSTX_SLEWRATE_DOWN_CLK BIT(14)
> +#define DSI_DPHY_LANES_TRIM_DPHY_TEST_RESERVED_1_CLK BIT(15)
> +#define DSI_DPHY_LANES_TRIM_DPHY_SKEW_DAT2 BIT(16)
> +#define DSI_DPHY_LANES_TRIM_DPHY_HSTX_SLEWRATE_UP_DAT2 BIT(18)
> +#define DSI_DPHY_LANES_TRIM_DPHY_HSTX_SLEWRATE_DOWN_DAT2 BIT(19)
> +#define DSI_DPHY_LANES_TRIM_DPHY_TEST_RESERVED_1_DAT2 BIT(20)
> +
> +#define DSI_ID_REG 0x00000FF0
> +
> +/* PRCMU DSI reset registers */
> +#define PRCM_DSI_SW_RESET 0x324
> +#define PRCM_DSI_SW_RESET_DSI0_SW_RESETN BIT(0)
> +#define PRCM_DSI_SW_RESET_DSI1_SW_RESETN BIT(1)
> +#define PRCM_DSI_SW_RESET_DSI2_SW_RESETN BIT(2)
Regs to other file?
> +
> +struct mcde_dsi {
> + struct device *dev;
> + struct mcde *mcde;
> + struct drm_bridge bridge;
> + struct drm_connector connector;
> + struct drm_panel *panel;
> + struct drm_bridge *bridge_out;
> + struct mipi_dsi_host dsi_host;
> + struct mipi_dsi_device *mdsi;
> + struct clk *hs_clk;
> + struct clk *lp_clk;
> + unsigned long hs_freq;
> + unsigned long lp_freq;
> + bool unused;
> +
> + void __iomem *regs;
> + struct regmap *prcmu;
> +};
Consider regmap.
I did not read rest of driver, ran out af time...
Sam
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