diff options
Diffstat (limited to 'drivers/gpu/drm/msm/mdp4/mdp4_dtv_encoder.c')
| -rw-r--r-- | drivers/gpu/drm/msm/mdp4/mdp4_dtv_encoder.c | 317 |
1 files changed, 317 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/mdp4/mdp4_dtv_encoder.c b/drivers/gpu/drm/msm/mdp4/mdp4_dtv_encoder.c new file mode 100644 index 000000000000..06d49e309d34 --- /dev/null +++ b/drivers/gpu/drm/msm/mdp4/mdp4_dtv_encoder.c @@ -0,0 +1,317 @@ +/* + * Copyright (C) 2013 Red Hat + * Author: Rob Clark <robdclark@gmail.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published by + * the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <mach/clk.h> + +#include "mdp4_kms.h" +#include "msm_connector.h" + +#include "drm_crtc.h" +#include "drm_crtc_helper.h" + + +struct mdp4_dtv_encoder { + struct drm_encoder base; + struct clk *src_clk; + 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(priv->kms); +} + +#ifdef CONFIG_MSM_BUS_SCALING +#include <mach/board.h> +/* not ironically named at all.. no, really.. */ +static void bs_init(struct mdp4_dtv_encoder *mdp4_dtv_encoder) +{ + struct drm_device *dev = mdp4_dtv_encoder->base.dev; + struct lcdc_platform_data *dtv_pdata = mdp4_find_pdata("dtv.0"); + + if (!dtv_pdata) { + dev_err(dev->dev, "could not find dtv pdata\n"); + return; + } + + if (dtv_pdata->bus_scale_table) { + mdp4_dtv_encoder->bsc = msm_bus_scale_register_client( + dtv_pdata->bus_scale_table); + DBG("bus scale client: %08x", mdp4_dtv_encoder->bsc); + DBG("lcdc_power_save: %p", dtv_pdata->lcdc_power_save); + if (dtv_pdata->lcdc_power_save) + dtv_pdata->lcdc_power_save(1); + } +} + +static void bs_fini(struct mdp4_dtv_encoder *mdp4_dtv_encoder) +{ + if (mdp4_dtv_encoder->bsc) { + msm_bus_scale_unregister_client(mdp4_dtv_encoder->bsc); + mdp4_dtv_encoder->bsc = 0; + } +} + +static void bs_set(struct mdp4_dtv_encoder *mdp4_dtv_encoder, int idx) +{ + if (mdp4_dtv_encoder->bsc) { + DBG("set bus scaling: %d", idx); + msm_bus_scale_client_update_request(mdp4_dtv_encoder->bsc, idx); + } +} +#else +static void bs_init(struct mdp4_dtv_encoder *mdp4_dtv_encoder) {} +static void bs_fini(struct mdp4_dtv_encoder *mdp4_dtv_encoder) {} +static void bs_set(struct mdp4_dtv_encoder *mdp4_dtv_encoder, int idx) {} +#endif + +static void mdp4_dtv_encoder_destroy(struct drm_encoder *encoder) +{ + struct mdp4_dtv_encoder *mdp4_dtv_encoder = to_mdp4_dtv_encoder(encoder); + bs_fini(mdp4_dtv_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_dpms(struct drm_encoder *encoder, int mode) +{ + struct drm_device *dev = encoder->dev; + struct mdp4_dtv_encoder *mdp4_dtv_encoder = to_mdp4_dtv_encoder(encoder); + struct msm_connector *msm_connector = get_connector(encoder); + struct mdp4_kms *mdp4_kms = get_kms(encoder); + bool enabled = (mode == DRM_MODE_DPMS_ON); + + DBG("mode=%d", mode); + + if (enabled == mdp4_dtv_encoder->enabled) + return; + + if (enabled) { + unsigned long pc = mdp4_dtv_encoder->pixclock; + int ret; + + bs_set(mdp4_dtv_encoder, 1); + + if (msm_connector) + msm_connector->funcs->dpms(msm_connector, mode); + + DBG("setting src_clk=%lu", pc); + + ret = clk_set_rate(mdp4_dtv_encoder->src_clk, pc); + if (ret) + dev_err(dev->dev, "failed to set src_clk to %lu: %d\n", pc, ret); + clk_prepare_enable(mdp4_dtv_encoder->src_clk); + ret = clk_prepare_enable(mdp4_dtv_encoder->hdmi_clk); + if (ret) + dev_err(dev->dev, "failed to enable hdmi_clk: %d\n", ret); + ret = clk_prepare_enable(mdp4_dtv_encoder->mdp_clk); + if (ret) + dev_err(dev->dev, "failed to enabled mdp_clk: %d\n", ret); + + mdp4_write(mdp4_kms, REG_MDP4_DTV_ENABLE, 1); + } else { + 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.. + */ + mdp4_irq_wait(mdp4_kms, MDP4_IRQ_EXTERNAL_VSYNC); + + clk_disable_unprepare(mdp4_dtv_encoder->src_clk); + clk_disable_unprepare(mdp4_dtv_encoder->hdmi_clk); + clk_disable_unprepare(mdp4_dtv_encoder->mdp_clk); + + if (msm_connector) + msm_connector->funcs->dpms(msm_connector, mode); + + bs_set(mdp4_dtv_encoder, 0); + } + + mdp4_dtv_encoder->enabled = enabled; +} + +static bool mdp4_dtv_encoder_mode_fixup(struct drm_encoder *encoder, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + return true; +} + +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 msm_connector *msm_connector = get_connector(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: %d:\"%s\" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x", + mode->base.id, mode->name, + mode->vrefresh, mode->clock, + mode->hdisplay, mode->hsync_start, + mode->hsync_end, mode->htotal, + mode->vdisplay, mode->vsync_start, + mode->vsync_end, mode->vtotal, + mode->type, mode->flags); + + 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); + + if (msm_connector) + msm_connector->funcs->mode_set(msm_connector, mode); +} + +static void mdp4_dtv_encoder_prepare(struct drm_encoder *encoder) +{ + mdp4_dtv_encoder_dpms(encoder, DRM_MODE_DPMS_OFF); +} + +static void mdp4_dtv_encoder_commit(struct drm_encoder *encoder) +{ + 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); + mdp4_dtv_encoder_dpms(encoder, DRM_MODE_DPMS_ON); +} + +static const struct drm_encoder_helper_funcs mdp4_dtv_encoder_helper_funcs = { + .dpms = mdp4_dtv_encoder_dpms, + .mode_fixup = mdp4_dtv_encoder_mode_fixup, + .mode_set = mdp4_dtv_encoder_mode_set, + .prepare = mdp4_dtv_encoder_prepare, + .commit = mdp4_dtv_encoder_commit, +}; + +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->src_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); + drm_encoder_helper_add(encoder, &mdp4_dtv_encoder_helper_funcs); + + mdp4_dtv_encoder->src_clk = devm_clk_get(dev->dev, "src_clk"); + if (IS_ERR(mdp4_dtv_encoder->src_clk)) { + dev_err(dev->dev, "failed to get src_clk\n"); + ret = PTR_ERR(mdp4_dtv_encoder->src_clk); + goto fail; + } + + mdp4_dtv_encoder->hdmi_clk = devm_clk_get(dev->dev, "hdmi_clk"); + if (IS_ERR(mdp4_dtv_encoder->hdmi_clk)) { + dev_err(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, "mdp_clk"); + if (IS_ERR(mdp4_dtv_encoder->mdp_clk)) { + dev_err(dev->dev, "failed to get mdp_clk\n"); + ret = PTR_ERR(mdp4_dtv_encoder->mdp_clk); + goto fail; + } + + bs_init(mdp4_dtv_encoder); + + return encoder; + +fail: + if (encoder) + mdp4_dtv_encoder_destroy(encoder); + + return ERR_PTR(ret); +} |