From: Vinay Simha BN vinaysimha@inforcecomputing.com
Create an mdp4 incoder for DSI. Only DSI video mode is supported as of now.
Signed-off-by: Archit Taneja architt@codeaurora.org Signed-off-by: Vinay Simha BN vinaysimha@inforcecomputing.com --- drivers/gpu/drm/msm/Makefile | 1 + drivers/gpu/drm/msm/mdp/mdp4/mdp4_dsi_encoder.c | 198 ++++++++++++++++++++++++ drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.h | 9 ++ 3 files changed, 208 insertions(+) create mode 100644 drivers/gpu/drm/msm/mdp/mdp4/mdp4_dsi_encoder.c
diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile index 156a93d..065ad41 100644 --- a/drivers/gpu/drm/msm/Makefile +++ b/drivers/gpu/drm/msm/Makefile @@ -54,6 +54,7 @@ msm-$(CONFIG_DRM_FBDEV_EMULATION) += msm_fbdev.o msm-$(CONFIG_COMMON_CLK) += mdp/mdp4/mdp4_lvds_pll.o
msm-$(CONFIG_DRM_MSM_DSI) += dsi/dsi.o \ + mdp/mdp4/mdp4_dsi_encoder.o \ dsi/dsi_cfg.o \ dsi/dsi_host.o \ dsi/dsi_manager.o \ diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_dsi_encoder.c b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_dsi_encoder.c new file mode 100644 index 0000000..49052bb --- /dev/null +++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_dsi_encoder.c @@ -0,0 +1,198 @@ +/* + * Copyright (c) 2015, The Linux Foundation. All rights reserved. + * Copyright (c) 2014, Inforce Computing. All rights reserved. + * + * Author: Vinay Simha vinaysimha@inforcecomputing.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_dsi_encoder { + struct drm_encoder base; + struct drm_panel *panel; + bool enabled; +}; +#define to_mdp4_dsi_encoder(x) container_of(x, struct mdp4_dsi_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_dsi_encoder_destroy(struct drm_encoder *encoder) +{ + struct mdp4_dsi_encoder *mdp4_dsi_encoder = to_mdp4_dsi_encoder(encoder); + + drm_encoder_cleanup(encoder); + kfree(mdp4_dsi_encoder); +} + +static const struct drm_encoder_funcs mdp4_dsi_encoder_funcs = { + .destroy = mdp4_dsi_encoder_destroy, +}; + +static bool mdp4_dsi_encoder_mode_fixup(struct drm_encoder *encoder, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + return true; +} + +static void mdp4_dsi_encoder_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + struct mdp4_kms *mdp4_kms = get_kms(encoder); + uint32_t dsi_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); + + ctrl_pol = 0; + if (mode->flags & DRM_MODE_FLAG_NHSYNC) + ctrl_pol |= MDP4_DSI_CTRL_POLARITY_HSYNC_LOW; + if (mode->flags & DRM_MODE_FLAG_NVSYNC) + ctrl_pol |= MDP4_DSI_CTRL_POLARITY_VSYNC_LOW; + /* probably need to get DATA_EN polarity from panel.. */ + + dsi_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 + dsi_hsync_skew; + display_v_end = vsync_period - ((mode->vsync_start - mode->vdisplay) * mode->htotal) + dsi_hsync_skew - 1; + + mdp4_write(mdp4_kms, REG_MDP4_DSI_HSYNC_CTRL, + MDP4_DSI_HSYNC_CTRL_PULSEW(mode->hsync_end - mode->hsync_start) | + MDP4_DSI_HSYNC_CTRL_PERIOD(mode->htotal)); + mdp4_write(mdp4_kms, REG_MDP4_DSI_VSYNC_PERIOD, vsync_period); + mdp4_write(mdp4_kms, REG_MDP4_DSI_VSYNC_LEN, vsync_len); + mdp4_write(mdp4_kms, REG_MDP4_DSI_DISPLAY_HCTRL, + MDP4_DSI_DISPLAY_HCTRL_START(hsync_start_x) | + MDP4_DSI_DISPLAY_HCTRL_END(hsync_end_x)); + mdp4_write(mdp4_kms, REG_MDP4_DSI_DISPLAY_VSTART, display_v_start); + mdp4_write(mdp4_kms, REG_MDP4_DSI_DISPLAY_VEND, display_v_end); + + mdp4_write(mdp4_kms, REG_MDP4_DSI_CTRL_POLARITY, ctrl_pol); + mdp4_write(mdp4_kms, REG_MDP4_DSI_UNDERFLOW_CLR, + MDP4_DSI_UNDERFLOW_CLR_ENABLE_RECOVERY | + MDP4_DSI_UNDERFLOW_CLR_COLOR(0xff)); + mdp4_write(mdp4_kms, REG_MDP4_DSI_ACTIVE_HCTL, + MDP4_DSI_ACTIVE_HCTL_START(0) | + MDP4_DSI_ACTIVE_HCTL_END(0)); + mdp4_write(mdp4_kms, REG_MDP4_DSI_HSYNC_SKEW, dsi_hsync_skew); + mdp4_write(mdp4_kms, REG_MDP4_DSI_BORDER_CLR, 0); + mdp4_write(mdp4_kms, REG_MDP4_DSI_ACTIVE_VSTART, 0); + mdp4_write(mdp4_kms, REG_MDP4_DSI_ACTIVE_VEND, 0); +} + +static void mdp4_dsi_encoder_disable(struct drm_encoder *encoder) +{ + struct mdp4_dsi_encoder *mdp4_dsi_encoder = to_mdp4_dsi_encoder(encoder); + struct mdp4_kms *mdp4_kms = get_kms(encoder); + + if (!mdp4_dsi_encoder->enabled) + return; + + mdp4_write(mdp4_kms, REG_MDP4_DSI_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_PRIMARY_VSYNC); + + mdp4_dsi_encoder->enabled = false; +} + +static void mdp4_dsi_encoder_enable(struct drm_encoder *encoder) +{ + struct mdp4_dsi_encoder *mdp4_dsi_encoder = to_mdp4_dsi_encoder(encoder); + struct mdp4_kms *mdp4_kms = get_kms(encoder); + + if (mdp4_dsi_encoder->enabled) + return; + + mdp4_crtc_set_config(encoder->crtc, + MDP4_DMA_CONFIG_PACK_ALIGN_MSB | + MDP4_DMA_CONFIG_DEFLKR_EN | + MDP4_DMA_CONFIG_DITHER_EN | + 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_DSI_VIDEO, 0); + + mdp4_write(mdp4_kms, REG_MDP4_DSI_ENABLE, 1); + + mdp4_dsi_encoder->enabled = true; +} + +static const struct drm_encoder_helper_funcs mdp4_dsi_encoder_helper_funcs = { + .mode_fixup = mdp4_dsi_encoder_mode_fixup, + .mode_set = mdp4_dsi_encoder_mode_set, + .disable = mdp4_dsi_encoder_disable, + .enable = mdp4_dsi_encoder_enable, +}; + +/* initialize encoder */ +struct drm_encoder *mdp4_dsi_encoder_init(struct drm_device *dev) +{ + struct drm_encoder *encoder = NULL; + struct mdp4_dsi_encoder *mdp4_dsi_encoder; + int ret; + + mdp4_dsi_encoder = kzalloc(sizeof(*mdp4_dsi_encoder), GFP_KERNEL); + if (!mdp4_dsi_encoder) { + ret = -ENOMEM; + goto fail; + } + + encoder = &mdp4_dsi_encoder->base; + + drm_encoder_init(dev, encoder, &mdp4_dsi_encoder_funcs, + DRM_MODE_ENCODER_DSI); + drm_encoder_helper_add(encoder, &mdp4_dsi_encoder_helper_funcs); + + return encoder; + +fail: + if (encoder) + mdp4_dsi_encoder_destroy(encoder); + + return ERR_PTR(ret); +} diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.h b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.h index 7d03585..f3bb808 100644 --- a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.h +++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.h @@ -217,6 +217,15 @@ struct drm_encoder *mdp4_lcdc_encoder_init(struct drm_device *dev, struct drm_connector *mdp4_lvds_connector_init(struct drm_device *dev, struct device_node *panel_node, struct drm_encoder *encoder);
+#ifdef CONFIG_DRM_MSM_DSI +struct drm_encoder *mdp4_dsi_encoder_init(struct drm_device *dev); +#else +static inline struct drm_encoder *mdp4_dsi_encoder_init(struct drm_device *dev) +{ + return ERR_PTR(-ENODEV); +} +#endif + #ifdef CONFIG_COMMON_CLK struct clk *mpd4_lvds_pll_init(struct drm_device *dev); #else