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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2013 Red Hat
* Author: Rob Clark <robdclark@gmail.com>
*/
#include <drm/drm_crtc.h>
#include <drm/drm_probe_helper.h>
#include "mdp4_kms.h"
struct mdp4_dtv_encoder {
struct drm_encoder base;
struct clk *hdmi_clk;
struct clk *mdp_clk;
unsigned long int pixclock;
bool enabled;
uint32_t bsc;
};
#define to_mdp4_dtv_encoder(x) container_of(x, struct mdp4_dtv_encoder, base)
static struct mdp4_kms *get_kms(struct drm_encoder *encoder)
{
struct msm_drm_private *priv = encoder->dev->dev_private;
return to_mdp4_kms(to_mdp_kms(priv->kms));
}
static void mdp4_dtv_encoder_destroy(struct drm_encoder *encoder)
{
struct mdp4_dtv_encoder *mdp4_dtv_encoder = to_mdp4_dtv_encoder(encoder);
drm_encoder_cleanup(encoder);
kfree(mdp4_dtv_encoder);
}
static const struct drm_encoder_funcs mdp4_dtv_encoder_funcs = {
.destroy = mdp4_dtv_encoder_destroy,
};
static void mdp4_dtv_encoder_mode_set(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct mdp4_dtv_encoder *mdp4_dtv_encoder = to_mdp4_dtv_encoder(encoder);
struct mdp4_kms *mdp4_kms = get_kms(encoder);
uint32_t dtv_hsync_skew, vsync_period, vsync_len, ctrl_pol;
uint32_t display_v_start, display_v_end;
uint32_t hsync_start_x, hsync_end_x;
mode = adjusted_mode;
DBG("set mode: " DRM_MODE_FMT, DRM_MODE_ARG(mode));
mdp4_dtv_encoder->pixclock = mode->clock * 1000;
DBG("pixclock=%lu", mdp4_dtv_encoder->pixclock);
ctrl_pol = 0;
if (mode->flags & DRM_MODE_FLAG_NHSYNC)
ctrl_pol |= MDP4_DTV_CTRL_POLARITY_HSYNC_LOW;
if (mode->flags & DRM_MODE_FLAG_NVSYNC)
ctrl_pol |= MDP4_DTV_CTRL_POLARITY_VSYNC_LOW;
/* probably need to get DATA_EN polarity from panel.. */
dtv_hsync_skew = 0; /* get this from panel? */
hsync_start_x = (mode->htotal - mode->hsync_start);
hsync_end_x = mode->htotal - (mode->hsync_start - mode->hdisplay) - 1;
vsync_period = mode->vtotal * mode->htotal;
vsync_len = (mode->vsync_end - mode->vsync_start) * mode->htotal;
display_v_start = (mode->vtotal - mode->vsync_start) * mode->htotal + dtv_hsync_skew;
display_v_end = vsync_period - ((mode->vsync_start - mode->vdisplay) * mode->htotal) + dtv_hsync_skew - 1;
mdp4_write(mdp4_kms, REG_MDP4_DTV_HSYNC_CTRL,
MDP4_DTV_HSYNC_CTRL_PULSEW(mode->hsync_end - mode->hsync_start) |
MDP4_DTV_HSYNC_CTRL_PERIOD(mode->htotal));
mdp4_write(mdp4_kms, REG_MDP4_DTV_VSYNC_PERIOD, vsync_period);
mdp4_write(mdp4_kms, REG_MDP4_DTV_VSYNC_LEN, vsync_len);
mdp4_write(mdp4_kms, REG_MDP4_DTV_DISPLAY_HCTRL,
MDP4_DTV_DISPLAY_HCTRL_START(hsync_start_x) |
MDP4_DTV_DISPLAY_HCTRL_END(hsync_end_x));
mdp4_write(mdp4_kms, REG_MDP4_DTV_DISPLAY_VSTART, display_v_start);
mdp4_write(mdp4_kms, REG_MDP4_DTV_DISPLAY_VEND, display_v_end);
mdp4_write(mdp4_kms, REG_MDP4_DTV_BORDER_CLR, 0);
mdp4_write(mdp4_kms, REG_MDP4_DTV_UNDERFLOW_CLR,
MDP4_DTV_UNDERFLOW_CLR_ENABLE_RECOVERY |
MDP4_DTV_UNDERFLOW_CLR_COLOR(0xff));
mdp4_write(mdp4_kms, REG_MDP4_DTV_HSYNC_SKEW, dtv_hsync_skew);
mdp4_write(mdp4_kms, REG_MDP4_DTV_CTRL_POLARITY, ctrl_pol);
mdp4_write(mdp4_kms, REG_MDP4_DTV_ACTIVE_HCTL,
MDP4_DTV_ACTIVE_HCTL_START(0) |
MDP4_DTV_ACTIVE_HCTL_END(0));
mdp4_write(mdp4_kms, REG_MDP4_DTV_ACTIVE_VSTART, 0);
mdp4_write(mdp4_kms, REG_MDP4_DTV_ACTIVE_VEND, 0);
}
static void mdp4_dtv_encoder_disable(struct drm_encoder *encoder)
{
struct mdp4_dtv_encoder *mdp4_dtv_encoder = to_mdp4_dtv_encoder(encoder);
struct mdp4_kms *mdp4_kms = get_kms(encoder);
if (WARN_ON(!mdp4_dtv_encoder->enabled))
return;
mdp4_write(mdp4_kms, REG_MDP4_DTV_ENABLE, 0);
/*
* Wait for a vsync so we know the ENABLE=0 latched before
* the (connector) source of the vsync's gets disabled,
* otherwise we end up in a funny state if we re-enable
* before the disable latches, which results that some of
* the settings changes for the new modeset (like new
* scanout buffer) don't latch properly..
*/
mdp_irq_wait(&mdp4_kms->base, MDP4_IRQ_EXTERNAL_VSYNC);
clk_disable_unprepare(mdp4_dtv_encoder->hdmi_clk);
clk_disable_unprepare(mdp4_dtv_encoder->mdp_clk);
mdp4_dtv_encoder->enabled = false;
}
static void mdp4_dtv_encoder_enable(struct drm_encoder *encoder)
{
struct drm_device *dev = encoder->dev;
struct mdp4_dtv_encoder *mdp4_dtv_encoder = to_mdp4_dtv_encoder(encoder);
struct mdp4_kms *mdp4_kms = get_kms(encoder);
unsigned long pc = mdp4_dtv_encoder->pixclock;
int ret;
if (WARN_ON(mdp4_dtv_encoder->enabled))
return;
mdp4_crtc_set_config(encoder->crtc,
MDP4_DMA_CONFIG_R_BPC(BPC8) |
MDP4_DMA_CONFIG_G_BPC(BPC8) |
MDP4_DMA_CONFIG_B_BPC(BPC8) |
MDP4_DMA_CONFIG_PACK(0x21));
mdp4_crtc_set_intf(encoder->crtc, INTF_LCDC_DTV, 1);
DBG("setting mdp_clk=%lu", pc);
ret = clk_set_rate(mdp4_dtv_encoder->mdp_clk, pc);
if (ret)
DRM_DEV_ERROR(dev->dev, "failed to set mdp_clk to %lu: %d\n",
pc, ret);
ret = clk_prepare_enable(mdp4_dtv_encoder->mdp_clk);
if (ret)
DRM_DEV_ERROR(dev->dev, "failed to enabled mdp_clk: %d\n", ret);
ret = clk_prepare_enable(mdp4_dtv_encoder->hdmi_clk);
if (ret)
DRM_DEV_ERROR(dev->dev, "failed to enable hdmi_clk: %d\n", ret);
mdp4_write(mdp4_kms, REG_MDP4_DTV_ENABLE, 1);
mdp4_dtv_encoder->enabled = true;
}
static const struct drm_encoder_helper_funcs mdp4_dtv_encoder_helper_funcs = {
.mode_set = mdp4_dtv_encoder_mode_set,
.enable = mdp4_dtv_encoder_enable,
.disable = mdp4_dtv_encoder_disable,
};
long mdp4_dtv_round_pixclk(struct drm_encoder *encoder, unsigned long rate)
{
struct mdp4_dtv_encoder *mdp4_dtv_encoder = to_mdp4_dtv_encoder(encoder);
return clk_round_rate(mdp4_dtv_encoder->mdp_clk, rate);
}
/* initialize encoder */
struct drm_encoder *mdp4_dtv_encoder_init(struct drm_device *dev)
{
struct drm_encoder *encoder = NULL;
struct mdp4_dtv_encoder *mdp4_dtv_encoder;
int ret;
mdp4_dtv_encoder = kzalloc(sizeof(*mdp4_dtv_encoder), GFP_KERNEL);
if (!mdp4_dtv_encoder) {
ret = -ENOMEM;
goto fail;
}
encoder = &mdp4_dtv_encoder->base;
drm_encoder_init(dev, encoder, &mdp4_dtv_encoder_funcs,
DRM_MODE_ENCODER_TMDS, NULL);
drm_encoder_helper_add(encoder, &mdp4_dtv_encoder_helper_funcs);
mdp4_dtv_encoder->hdmi_clk = devm_clk_get(dev->dev, "hdmi_clk");
if (IS_ERR(mdp4_dtv_encoder->hdmi_clk)) {
DRM_DEV_ERROR(dev->dev, "failed to get hdmi_clk\n");
ret = PTR_ERR(mdp4_dtv_encoder->hdmi_clk);
goto fail;
}
mdp4_dtv_encoder->mdp_clk = devm_clk_get(dev->dev, "tv_clk");
if (IS_ERR(mdp4_dtv_encoder->mdp_clk)) {
DRM_DEV_ERROR(dev->dev, "failed to get tv_clk\n");
ret = PTR_ERR(mdp4_dtv_encoder->mdp_clk);
goto fail;
}
return encoder;
fail:
if (encoder)
mdp4_dtv_encoder_destroy(encoder);
return ERR_PTR(ret);
}
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