--- /dev/null
+/*
+ * 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 "mdp4_kms.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(to_mdp_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 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 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);
+}
+
+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->src_clk);
+ clk_disable_unprepare(mdp4_dtv_encoder->hdmi_clk);
+ clk_disable_unprepare(mdp4_dtv_encoder->mdp_clk);
+
+ bs_set(mdp4_dtv_encoder, 0);
+
+ 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);
+
+ bs_set(mdp4_dtv_encoder, 1);
+
+ 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);
+
+ mdp4_dtv_encoder->enabled = true;
+}
+
+static const struct drm_encoder_helper_funcs mdp4_dtv_encoder_helper_funcs = {
+ .mode_fixup = mdp4_dtv_encoder_mode_fixup,
+ .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->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);
+}
Code Review / kvmfornfv.git / blobdiff