475 lines
13 KiB
C
475 lines
13 KiB
C
/*
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* Copyright (C) 2016 Maxime Ripard
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*
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* Maxime Ripard <maxime.ripard@free-electrons.com>
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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 as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*/
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#include <drm/drmP.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_edid.h>
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#include <drm/drm_encoder.h>
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#include <drm/drm_of.h>
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#include <drm/drm_panel.h>
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#include <linux/clk.h>
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#include <linux/component.h>
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#include <linux/iopoll.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include "sun4i_backend.h"
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#include "sun4i_crtc.h"
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#include "sun4i_drv.h"
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#include "sun4i_hdmi.h"
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#include "sun4i_tcon.h"
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static inline struct sun4i_hdmi *
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drm_encoder_to_sun4i_hdmi(struct drm_encoder *encoder)
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{
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return container_of(encoder, struct sun4i_hdmi,
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encoder);
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}
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static inline struct sun4i_hdmi *
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drm_connector_to_sun4i_hdmi(struct drm_connector *connector)
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{
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return container_of(connector, struct sun4i_hdmi,
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connector);
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}
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static int sun4i_hdmi_setup_avi_infoframes(struct sun4i_hdmi *hdmi,
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struct drm_display_mode *mode)
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{
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struct hdmi_avi_infoframe frame;
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u8 buffer[17];
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int i, ret;
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ret = drm_hdmi_avi_infoframe_from_display_mode(&frame, mode, false);
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if (ret < 0) {
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DRM_ERROR("Failed to get infoframes from mode\n");
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return ret;
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}
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ret = hdmi_avi_infoframe_pack(&frame, buffer, sizeof(buffer));
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if (ret < 0) {
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DRM_ERROR("Failed to pack infoframes\n");
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return ret;
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}
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for (i = 0; i < sizeof(buffer); i++)
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writeb(buffer[i], hdmi->base + SUN4I_HDMI_AVI_INFOFRAME_REG(i));
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return 0;
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}
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static int sun4i_hdmi_atomic_check(struct drm_encoder *encoder,
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struct drm_crtc_state *crtc_state,
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struct drm_connector_state *conn_state)
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{
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struct drm_display_mode *mode = &crtc_state->mode;
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if (mode->flags & DRM_MODE_FLAG_DBLCLK)
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return -EINVAL;
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return 0;
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}
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static void sun4i_hdmi_disable(struct drm_encoder *encoder)
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{
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struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);
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struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc);
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struct sun4i_tcon *tcon = crtc->tcon;
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u32 val;
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DRM_DEBUG_DRIVER("Disabling the HDMI Output\n");
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val = readl(hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
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val &= ~SUN4I_HDMI_VID_CTRL_ENABLE;
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writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
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sun4i_tcon_channel_disable(tcon, 1);
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}
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static void sun4i_hdmi_enable(struct drm_encoder *encoder)
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{
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struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
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struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);
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struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc);
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struct sun4i_tcon *tcon = crtc->tcon;
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u32 val = 0;
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DRM_DEBUG_DRIVER("Enabling the HDMI Output\n");
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sun4i_tcon_channel_enable(tcon, 1);
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sun4i_hdmi_setup_avi_infoframes(hdmi, mode);
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val |= SUN4I_HDMI_PKT_CTRL_TYPE(0, SUN4I_HDMI_PKT_AVI);
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val |= SUN4I_HDMI_PKT_CTRL_TYPE(1, SUN4I_HDMI_PKT_END);
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writel(val, hdmi->base + SUN4I_HDMI_PKT_CTRL_REG(0));
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val = SUN4I_HDMI_VID_CTRL_ENABLE;
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if (hdmi->hdmi_monitor)
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val |= SUN4I_HDMI_VID_CTRL_HDMI_MODE;
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writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
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}
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static void sun4i_hdmi_mode_set(struct drm_encoder *encoder,
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struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode)
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{
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struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);
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struct sun4i_crtc *crtc = drm_crtc_to_sun4i_crtc(encoder->crtc);
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struct sun4i_tcon *tcon = crtc->tcon;
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unsigned int x, y;
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u32 val;
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sun4i_tcon1_mode_set(tcon, mode);
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sun4i_tcon_set_mux(tcon, 1, encoder);
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clk_set_rate(tcon->sclk1, mode->crtc_clock * 1000);
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clk_set_rate(hdmi->mod_clk, mode->crtc_clock * 1000);
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clk_set_rate(hdmi->tmds_clk, mode->crtc_clock * 1000);
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/* Set input sync enable */
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writel(SUN4I_HDMI_UNKNOWN_INPUT_SYNC,
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hdmi->base + SUN4I_HDMI_UNKNOWN_REG);
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/* Setup timing registers */
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writel(SUN4I_HDMI_VID_TIMING_X(mode->hdisplay) |
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SUN4I_HDMI_VID_TIMING_Y(mode->vdisplay),
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hdmi->base + SUN4I_HDMI_VID_TIMING_ACT_REG);
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x = mode->htotal - mode->hsync_start;
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y = mode->vtotal - mode->vsync_start;
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writel(SUN4I_HDMI_VID_TIMING_X(x) | SUN4I_HDMI_VID_TIMING_Y(y),
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hdmi->base + SUN4I_HDMI_VID_TIMING_BP_REG);
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x = mode->hsync_start - mode->hdisplay;
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y = mode->vsync_start - mode->vdisplay;
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writel(SUN4I_HDMI_VID_TIMING_X(x) | SUN4I_HDMI_VID_TIMING_Y(y),
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hdmi->base + SUN4I_HDMI_VID_TIMING_FP_REG);
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x = mode->hsync_end - mode->hsync_start;
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y = mode->vsync_end - mode->vsync_start;
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writel(SUN4I_HDMI_VID_TIMING_X(x) | SUN4I_HDMI_VID_TIMING_Y(y),
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hdmi->base + SUN4I_HDMI_VID_TIMING_SPW_REG);
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val = SUN4I_HDMI_VID_TIMING_POL_TX_CLK;
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if (mode->flags & DRM_MODE_FLAG_PHSYNC)
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val |= SUN4I_HDMI_VID_TIMING_POL_HSYNC;
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if (mode->flags & DRM_MODE_FLAG_PVSYNC)
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val |= SUN4I_HDMI_VID_TIMING_POL_VSYNC;
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writel(val, hdmi->base + SUN4I_HDMI_VID_TIMING_POL_REG);
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}
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static const struct drm_encoder_helper_funcs sun4i_hdmi_helper_funcs = {
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.atomic_check = sun4i_hdmi_atomic_check,
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.disable = sun4i_hdmi_disable,
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.enable = sun4i_hdmi_enable,
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.mode_set = sun4i_hdmi_mode_set,
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};
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static const struct drm_encoder_funcs sun4i_hdmi_funcs = {
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.destroy = drm_encoder_cleanup,
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};
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static int sun4i_hdmi_get_modes(struct drm_connector *connector)
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{
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struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);
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struct edid *edid;
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int ret;
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edid = drm_get_edid(connector, hdmi->i2c);
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if (!edid)
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return 0;
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hdmi->hdmi_monitor = drm_detect_hdmi_monitor(edid);
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DRM_DEBUG_DRIVER("Monitor is %s monitor\n",
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hdmi->hdmi_monitor ? "an HDMI" : "a DVI");
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drm_mode_connector_update_edid_property(connector, edid);
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cec_s_phys_addr_from_edid(hdmi->cec_adap, edid);
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ret = drm_add_edid_modes(connector, edid);
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kfree(edid);
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return ret;
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}
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static const struct drm_connector_helper_funcs sun4i_hdmi_connector_helper_funcs = {
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.get_modes = sun4i_hdmi_get_modes,
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};
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static enum drm_connector_status
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sun4i_hdmi_connector_detect(struct drm_connector *connector, bool force)
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{
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struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);
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unsigned long reg;
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if (readl_poll_timeout(hdmi->base + SUN4I_HDMI_HPD_REG, reg,
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reg & SUN4I_HDMI_HPD_HIGH,
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0, 500000)) {
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cec_phys_addr_invalidate(hdmi->cec_adap);
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return connector_status_disconnected;
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}
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return connector_status_connected;
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}
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static const struct drm_connector_funcs sun4i_hdmi_connector_funcs = {
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.detect = sun4i_hdmi_connector_detect,
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.fill_modes = drm_helper_probe_single_connector_modes,
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.destroy = drm_connector_cleanup,
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.reset = drm_atomic_helper_connector_reset,
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.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
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};
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#ifdef CONFIG_DRM_SUN4I_HDMI_CEC
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static bool sun4i_hdmi_cec_pin_read(struct cec_adapter *adap)
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{
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struct sun4i_hdmi *hdmi = cec_get_drvdata(adap);
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return readl(hdmi->base + SUN4I_HDMI_CEC) & SUN4I_HDMI_CEC_RX;
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}
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static void sun4i_hdmi_cec_pin_low(struct cec_adapter *adap)
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{
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struct sun4i_hdmi *hdmi = cec_get_drvdata(adap);
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/* Start driving the CEC pin low */
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writel(SUN4I_HDMI_CEC_ENABLE, hdmi->base + SUN4I_HDMI_CEC);
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}
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static void sun4i_hdmi_cec_pin_high(struct cec_adapter *adap)
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{
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struct sun4i_hdmi *hdmi = cec_get_drvdata(adap);
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/*
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* Stop driving the CEC pin, the pull up will take over
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* unless another CEC device is driving the pin low.
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*/
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writel(0, hdmi->base + SUN4I_HDMI_CEC);
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}
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static const struct cec_pin_ops sun4i_hdmi_cec_pin_ops = {
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.read = sun4i_hdmi_cec_pin_read,
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.low = sun4i_hdmi_cec_pin_low,
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.high = sun4i_hdmi_cec_pin_high,
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};
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#endif
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static int sun4i_hdmi_bind(struct device *dev, struct device *master,
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void *data)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct drm_device *drm = data;
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struct sun4i_drv *drv = drm->dev_private;
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struct sun4i_hdmi *hdmi;
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struct resource *res;
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u32 reg;
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int ret;
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hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
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if (!hdmi)
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return -ENOMEM;
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dev_set_drvdata(dev, hdmi);
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hdmi->dev = dev;
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hdmi->drv = drv;
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res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
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hdmi->base = devm_ioremap_resource(dev, res);
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if (IS_ERR(hdmi->base)) {
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dev_err(dev, "Couldn't map the HDMI encoder registers\n");
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return PTR_ERR(hdmi->base);
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}
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hdmi->bus_clk = devm_clk_get(dev, "ahb");
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if (IS_ERR(hdmi->bus_clk)) {
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dev_err(dev, "Couldn't get the HDMI bus clock\n");
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return PTR_ERR(hdmi->bus_clk);
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}
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clk_prepare_enable(hdmi->bus_clk);
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hdmi->mod_clk = devm_clk_get(dev, "mod");
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if (IS_ERR(hdmi->mod_clk)) {
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dev_err(dev, "Couldn't get the HDMI mod clock\n");
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return PTR_ERR(hdmi->mod_clk);
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}
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clk_prepare_enable(hdmi->mod_clk);
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hdmi->pll0_clk = devm_clk_get(dev, "pll-0");
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if (IS_ERR(hdmi->pll0_clk)) {
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dev_err(dev, "Couldn't get the HDMI PLL 0 clock\n");
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return PTR_ERR(hdmi->pll0_clk);
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}
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hdmi->pll1_clk = devm_clk_get(dev, "pll-1");
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if (IS_ERR(hdmi->pll1_clk)) {
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dev_err(dev, "Couldn't get the HDMI PLL 1 clock\n");
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return PTR_ERR(hdmi->pll1_clk);
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}
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ret = sun4i_tmds_create(hdmi);
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if (ret) {
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dev_err(dev, "Couldn't create the TMDS clock\n");
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return ret;
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}
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writel(SUN4I_HDMI_CTRL_ENABLE, hdmi->base + SUN4I_HDMI_CTRL_REG);
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writel(SUN4I_HDMI_PAD_CTRL0_TXEN | SUN4I_HDMI_PAD_CTRL0_CKEN |
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SUN4I_HDMI_PAD_CTRL0_PWENG | SUN4I_HDMI_PAD_CTRL0_PWEND |
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SUN4I_HDMI_PAD_CTRL0_PWENC | SUN4I_HDMI_PAD_CTRL0_LDODEN |
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SUN4I_HDMI_PAD_CTRL0_LDOCEN | SUN4I_HDMI_PAD_CTRL0_BIASEN,
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hdmi->base + SUN4I_HDMI_PAD_CTRL0_REG);
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/*
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* We can't just initialize the register there, we need to
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* protect the clock bits that have already been read out and
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* cached by the clock framework.
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*/
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reg = readl(hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
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reg &= SUN4I_HDMI_PAD_CTRL1_HALVE_CLK;
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reg |= SUN4I_HDMI_PAD_CTRL1_REG_AMP(6) |
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SUN4I_HDMI_PAD_CTRL1_REG_EMP(2) |
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SUN4I_HDMI_PAD_CTRL1_REG_DENCK |
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SUN4I_HDMI_PAD_CTRL1_REG_DEN |
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SUN4I_HDMI_PAD_CTRL1_EMPCK_OPT |
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SUN4I_HDMI_PAD_CTRL1_EMP_OPT |
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SUN4I_HDMI_PAD_CTRL1_AMPCK_OPT |
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SUN4I_HDMI_PAD_CTRL1_AMP_OPT;
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writel(reg, hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);
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reg = readl(hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);
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reg &= SUN4I_HDMI_PLL_CTRL_DIV_MASK;
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reg |= SUN4I_HDMI_PLL_CTRL_VCO_S(8) | SUN4I_HDMI_PLL_CTRL_CS(7) |
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SUN4I_HDMI_PLL_CTRL_CP_S(15) | SUN4I_HDMI_PLL_CTRL_S(7) |
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SUN4I_HDMI_PLL_CTRL_VCO_GAIN(4) | SUN4I_HDMI_PLL_CTRL_SDIV2 |
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SUN4I_HDMI_PLL_CTRL_LDO2_EN | SUN4I_HDMI_PLL_CTRL_LDO1_EN |
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SUN4I_HDMI_PLL_CTRL_HV_IS_33 | SUN4I_HDMI_PLL_CTRL_BWS |
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SUN4I_HDMI_PLL_CTRL_PLL_EN;
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writel(reg, hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);
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ret = sun4i_hdmi_i2c_create(dev, hdmi);
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if (ret) {
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dev_err(dev, "Couldn't create the HDMI I2C adapter\n");
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return ret;
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}
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drm_encoder_helper_add(&hdmi->encoder,
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&sun4i_hdmi_helper_funcs);
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ret = drm_encoder_init(drm,
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&hdmi->encoder,
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&sun4i_hdmi_funcs,
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DRM_MODE_ENCODER_TMDS,
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NULL);
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if (ret) {
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dev_err(dev, "Couldn't initialise the HDMI encoder\n");
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goto err_del_i2c_adapter;
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}
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hdmi->encoder.possible_crtcs = drm_of_find_possible_crtcs(drm,
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dev->of_node);
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if (!hdmi->encoder.possible_crtcs) {
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ret = -EPROBE_DEFER;
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goto err_del_i2c_adapter;
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}
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#ifdef CONFIG_DRM_SUN4I_HDMI_CEC
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hdmi->cec_adap = cec_pin_allocate_adapter(&sun4i_hdmi_cec_pin_ops,
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hdmi, "sun4i", CEC_CAP_TRANSMIT | CEC_CAP_LOG_ADDRS |
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CEC_CAP_PASSTHROUGH | CEC_CAP_RC);
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ret = PTR_ERR_OR_ZERO(hdmi->cec_adap);
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if (ret < 0)
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goto err_cleanup_connector;
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writel(readl(hdmi->base + SUN4I_HDMI_CEC) & ~SUN4I_HDMI_CEC_TX,
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hdmi->base + SUN4I_HDMI_CEC);
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#endif
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drm_connector_helper_add(&hdmi->connector,
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&sun4i_hdmi_connector_helper_funcs);
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ret = drm_connector_init(drm, &hdmi->connector,
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&sun4i_hdmi_connector_funcs,
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DRM_MODE_CONNECTOR_HDMIA);
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if (ret) {
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dev_err(dev,
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"Couldn't initialise the HDMI connector\n");
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goto err_cleanup_connector;
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}
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/* There is no HPD interrupt, so we need to poll the controller */
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hdmi->connector.polled = DRM_CONNECTOR_POLL_CONNECT |
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DRM_CONNECTOR_POLL_DISCONNECT;
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ret = cec_register_adapter(hdmi->cec_adap, dev);
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if (ret < 0)
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goto err_cleanup_connector;
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drm_mode_connector_attach_encoder(&hdmi->connector, &hdmi->encoder);
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return 0;
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err_cleanup_connector:
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cec_delete_adapter(hdmi->cec_adap);
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drm_encoder_cleanup(&hdmi->encoder);
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err_del_i2c_adapter:
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i2c_del_adapter(hdmi->i2c);
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return ret;
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}
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static void sun4i_hdmi_unbind(struct device *dev, struct device *master,
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void *data)
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{
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struct sun4i_hdmi *hdmi = dev_get_drvdata(dev);
|
|
|
|
cec_unregister_adapter(hdmi->cec_adap);
|
|
drm_connector_cleanup(&hdmi->connector);
|
|
drm_encoder_cleanup(&hdmi->encoder);
|
|
i2c_del_adapter(hdmi->i2c);
|
|
}
|
|
|
|
static const struct component_ops sun4i_hdmi_ops = {
|
|
.bind = sun4i_hdmi_bind,
|
|
.unbind = sun4i_hdmi_unbind,
|
|
};
|
|
|
|
static int sun4i_hdmi_probe(struct platform_device *pdev)
|
|
{
|
|
return component_add(&pdev->dev, &sun4i_hdmi_ops);
|
|
}
|
|
|
|
static int sun4i_hdmi_remove(struct platform_device *pdev)
|
|
{
|
|
component_del(&pdev->dev, &sun4i_hdmi_ops);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct of_device_id sun4i_hdmi_of_table[] = {
|
|
{ .compatible = "allwinner,sun5i-a10s-hdmi" },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, sun4i_hdmi_of_table);
|
|
|
|
static struct platform_driver sun4i_hdmi_driver = {
|
|
.probe = sun4i_hdmi_probe,
|
|
.remove = sun4i_hdmi_remove,
|
|
.driver = {
|
|
.name = "sun4i-hdmi",
|
|
.of_match_table = sun4i_hdmi_of_table,
|
|
},
|
|
};
|
|
module_platform_driver(sun4i_hdmi_driver);
|
|
|
|
MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
|
|
MODULE_DESCRIPTION("Allwinner A10 HDMI Driver");
|
|
MODULE_LICENSE("GPL");
|