diff options
Diffstat (limited to 'drivers/gpu/drm/msm/disp/mdp4/mdp4_lcdc_encoder.c')
| -rw-r--r-- | drivers/gpu/drm/msm/disp/mdp4/mdp4_lcdc_encoder.c | 503 |
1 files changed, 503 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/disp/mdp4/mdp4_lcdc_encoder.c b/drivers/gpu/drm/msm/disp/mdp4/mdp4_lcdc_encoder.c new file mode 100644 index 000000000000..4a645926edb7 --- /dev/null +++ b/drivers/gpu/drm/msm/disp/mdp4/mdp4_lcdc_encoder.c @@ -0,0 +1,503 @@ +/* + * Copyright (C) 2014 Red Hat + * Author: Rob Clark <robdclark@gmail.com> + * 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 <drm/drm_crtc.h> +#include <drm/drm_crtc_helper.h> + +#include "mdp4_kms.h" + +struct mdp4_lcdc_encoder { + struct drm_encoder base; + struct device_node *panel_node; + struct drm_panel *panel; + struct clk *lcdc_clk; + unsigned long int pixclock; + struct regulator *regs[3]; + bool enabled; + uint32_t bsc; +}; +#define to_mdp4_lcdc_encoder(x) container_of(x, struct mdp4_lcdc_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 DOWNSTREAM_CONFIG_MSM_BUS_SCALING +#include <mach/board.h> +static void bs_init(struct mdp4_lcdc_encoder *mdp4_lcdc_encoder) +{ + struct drm_device *dev = mdp4_lcdc_encoder->base.dev; + struct lcdc_platform_data *lcdc_pdata = mdp4_find_pdata("lvds.0"); + + if (!lcdc_pdata) { + dev_err(dev->dev, "could not find lvds pdata\n"); + return; + } + + if (lcdc_pdata->bus_scale_table) { + mdp4_lcdc_encoder->bsc = msm_bus_scale_register_client( + lcdc_pdata->bus_scale_table); + DBG("lvds : bus scale client: %08x", mdp4_lcdc_encoder->bsc); + } +} + +static void bs_fini(struct mdp4_lcdc_encoder *mdp4_lcdc_encoder) +{ + if (mdp4_lcdc_encoder->bsc) { + msm_bus_scale_unregister_client(mdp4_lcdc_encoder->bsc); + mdp4_lcdc_encoder->bsc = 0; + } +} + +static void bs_set(struct mdp4_lcdc_encoder *mdp4_lcdc_encoder, int idx) +{ + if (mdp4_lcdc_encoder->bsc) { + DBG("set bus scaling: %d", idx); + msm_bus_scale_client_update_request(mdp4_lcdc_encoder->bsc, idx); + } +} +#else +static void bs_init(struct mdp4_lcdc_encoder *mdp4_lcdc_encoder) {} +static void bs_fini(struct mdp4_lcdc_encoder *mdp4_lcdc_encoder) {} +static void bs_set(struct mdp4_lcdc_encoder *mdp4_lcdc_encoder, int idx) {} +#endif + +static void mdp4_lcdc_encoder_destroy(struct drm_encoder *encoder) +{ + struct mdp4_lcdc_encoder *mdp4_lcdc_encoder = + to_mdp4_lcdc_encoder(encoder); + bs_fini(mdp4_lcdc_encoder); + drm_encoder_cleanup(encoder); + kfree(mdp4_lcdc_encoder); +} + +static const struct drm_encoder_funcs mdp4_lcdc_encoder_funcs = { + .destroy = mdp4_lcdc_encoder_destroy, +}; + +/* this should probably be a helper: */ +static struct drm_connector *get_connector(struct drm_encoder *encoder) +{ + struct drm_device *dev = encoder->dev; + struct drm_connector *connector; + + list_for_each_entry(connector, &dev->mode_config.connector_list, head) + if (connector->encoder == encoder) + return connector; + + return NULL; +} + +static void setup_phy(struct drm_encoder *encoder) +{ + struct drm_device *dev = encoder->dev; + struct drm_connector *connector = get_connector(encoder); + struct mdp4_kms *mdp4_kms = get_kms(encoder); + uint32_t lvds_intf = 0, lvds_phy_cfg0 = 0; + int bpp, nchan, swap; + + if (!connector) + return; + + bpp = 3 * connector->display_info.bpc; + + if (!bpp) + bpp = 18; + + /* TODO, these should come from panel somehow: */ + nchan = 1; + swap = 0; + + switch (bpp) { + case 24: + mdp4_write(mdp4_kms, REG_MDP4_LCDC_LVDS_MUX_CTL_3_TO_0(0), + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT0(0x08) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT1(0x05) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT2(0x04) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT3(0x03)); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_LVDS_MUX_CTL_6_TO_4(0), + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT4(0x02) | + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT5(0x01) | + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT6(0x00)); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_LVDS_MUX_CTL_3_TO_0(1), + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT0(0x11) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT1(0x10) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT2(0x0d) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT3(0x0c)); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_LVDS_MUX_CTL_6_TO_4(1), + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT4(0x0b) | + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT5(0x0a) | + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT6(0x09)); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_LVDS_MUX_CTL_3_TO_0(2), + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT0(0x1a) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT1(0x19) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT2(0x18) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT3(0x15)); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_LVDS_MUX_CTL_6_TO_4(2), + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT4(0x14) | + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT5(0x13) | + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT6(0x12)); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_LVDS_MUX_CTL_3_TO_0(3), + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT0(0x1b) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT1(0x17) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT2(0x16) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT3(0x0f)); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_LVDS_MUX_CTL_6_TO_4(3), + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT4(0x0e) | + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT5(0x07) | + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT6(0x06)); + if (nchan == 2) { + lvds_intf |= MDP4_LCDC_LVDS_INTF_CTL_CH2_DATA_LANE3_EN | + MDP4_LCDC_LVDS_INTF_CTL_CH2_DATA_LANE2_EN | + MDP4_LCDC_LVDS_INTF_CTL_CH2_DATA_LANE1_EN | + MDP4_LCDC_LVDS_INTF_CTL_CH2_DATA_LANE0_EN | + MDP4_LCDC_LVDS_INTF_CTL_CH1_DATA_LANE3_EN | + MDP4_LCDC_LVDS_INTF_CTL_CH1_DATA_LANE2_EN | + MDP4_LCDC_LVDS_INTF_CTL_CH1_DATA_LANE1_EN | + MDP4_LCDC_LVDS_INTF_CTL_CH1_DATA_LANE0_EN; + } else { + lvds_intf |= MDP4_LCDC_LVDS_INTF_CTL_CH1_DATA_LANE3_EN | + MDP4_LCDC_LVDS_INTF_CTL_CH1_DATA_LANE2_EN | + MDP4_LCDC_LVDS_INTF_CTL_CH1_DATA_LANE1_EN | + MDP4_LCDC_LVDS_INTF_CTL_CH1_DATA_LANE0_EN; + } + break; + + case 18: + mdp4_write(mdp4_kms, REG_MDP4_LCDC_LVDS_MUX_CTL_3_TO_0(0), + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT0(0x0a) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT1(0x07) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT2(0x06) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT3(0x05)); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_LVDS_MUX_CTL_6_TO_4(0), + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT4(0x04) | + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT5(0x03) | + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT6(0x02)); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_LVDS_MUX_CTL_3_TO_0(1), + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT0(0x13) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT1(0x12) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT2(0x0f) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT3(0x0e)); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_LVDS_MUX_CTL_6_TO_4(1), + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT4(0x0d) | + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT5(0x0c) | + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT6(0x0b)); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_LVDS_MUX_CTL_3_TO_0(2), + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT0(0x1a) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT1(0x19) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT2(0x18) | + MDP4_LCDC_LVDS_MUX_CTL_3_TO_0_BIT3(0x17)); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_LVDS_MUX_CTL_6_TO_4(2), + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT4(0x16) | + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT5(0x15) | + MDP4_LCDC_LVDS_MUX_CTL_6_TO_4_BIT6(0x14)); + if (nchan == 2) { + lvds_intf |= MDP4_LCDC_LVDS_INTF_CTL_CH2_DATA_LANE2_EN | + MDP4_LCDC_LVDS_INTF_CTL_CH2_DATA_LANE1_EN | + MDP4_LCDC_LVDS_INTF_CTL_CH2_DATA_LANE0_EN | + MDP4_LCDC_LVDS_INTF_CTL_CH1_DATA_LANE2_EN | + MDP4_LCDC_LVDS_INTF_CTL_CH1_DATA_LANE1_EN | + MDP4_LCDC_LVDS_INTF_CTL_CH1_DATA_LANE0_EN; + } else { + lvds_intf |= MDP4_LCDC_LVDS_INTF_CTL_CH1_DATA_LANE2_EN | + MDP4_LCDC_LVDS_INTF_CTL_CH1_DATA_LANE1_EN | + MDP4_LCDC_LVDS_INTF_CTL_CH1_DATA_LANE0_EN; + } + lvds_intf |= MDP4_LCDC_LVDS_INTF_CTL_RGB_OUT; + break; + + default: + dev_err(dev->dev, "unknown bpp: %d\n", bpp); + return; + } + + switch (nchan) { + case 1: + lvds_phy_cfg0 = MDP4_LVDS_PHY_CFG0_CHANNEL0; + lvds_intf |= MDP4_LCDC_LVDS_INTF_CTL_CH1_CLK_LANE_EN | + MDP4_LCDC_LVDS_INTF_CTL_MODE_SEL; + break; + case 2: + lvds_phy_cfg0 = MDP4_LVDS_PHY_CFG0_CHANNEL0 | + MDP4_LVDS_PHY_CFG0_CHANNEL1; + lvds_intf |= MDP4_LCDC_LVDS_INTF_CTL_CH2_CLK_LANE_EN | + MDP4_LCDC_LVDS_INTF_CTL_CH1_CLK_LANE_EN; + break; + default: + dev_err(dev->dev, "unknown # of channels: %d\n", nchan); + return; + } + + if (swap) + lvds_intf |= MDP4_LCDC_LVDS_INTF_CTL_CH_SWAP; + + lvds_intf |= MDP4_LCDC_LVDS_INTF_CTL_ENABLE; + + mdp4_write(mdp4_kms, REG_MDP4_LVDS_PHY_CFG0, lvds_phy_cfg0); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_LVDS_INTF_CTL, lvds_intf); + mdp4_write(mdp4_kms, REG_MDP4_LVDS_PHY_CFG2, 0x30); + + mb(); + udelay(1); + lvds_phy_cfg0 |= MDP4_LVDS_PHY_CFG0_SERIALIZATION_ENBLE; + mdp4_write(mdp4_kms, REG_MDP4_LVDS_PHY_CFG0, lvds_phy_cfg0); +} + +static void mdp4_lcdc_encoder_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + struct mdp4_lcdc_encoder *mdp4_lcdc_encoder = + to_mdp4_lcdc_encoder(encoder); + struct mdp4_kms *mdp4_kms = get_kms(encoder); + uint32_t lcdc_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_lcdc_encoder->pixclock = mode->clock * 1000; + + DBG("pixclock=%lu", mdp4_lcdc_encoder->pixclock); + + ctrl_pol = 0; + if (mode->flags & DRM_MODE_FLAG_NHSYNC) + ctrl_pol |= MDP4_LCDC_CTRL_POLARITY_HSYNC_LOW; + if (mode->flags & DRM_MODE_FLAG_NVSYNC) + ctrl_pol |= MDP4_LCDC_CTRL_POLARITY_VSYNC_LOW; + /* probably need to get DATA_EN polarity from panel.. */ + + lcdc_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 + lcdc_hsync_skew; + display_v_end = vsync_period - ((mode->vsync_start - mode->vdisplay) * mode->htotal) + lcdc_hsync_skew - 1; + + mdp4_write(mdp4_kms, REG_MDP4_LCDC_HSYNC_CTRL, + MDP4_LCDC_HSYNC_CTRL_PULSEW(mode->hsync_end - mode->hsync_start) | + MDP4_LCDC_HSYNC_CTRL_PERIOD(mode->htotal)); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_VSYNC_PERIOD, vsync_period); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_VSYNC_LEN, vsync_len); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_DISPLAY_HCTRL, + MDP4_LCDC_DISPLAY_HCTRL_START(hsync_start_x) | + MDP4_LCDC_DISPLAY_HCTRL_END(hsync_end_x)); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_DISPLAY_VSTART, display_v_start); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_DISPLAY_VEND, display_v_end); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_BORDER_CLR, 0); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_UNDERFLOW_CLR, + MDP4_LCDC_UNDERFLOW_CLR_ENABLE_RECOVERY | + MDP4_LCDC_UNDERFLOW_CLR_COLOR(0xff)); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_HSYNC_SKEW, lcdc_hsync_skew); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_CTRL_POLARITY, ctrl_pol); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_ACTIVE_HCTL, + MDP4_LCDC_ACTIVE_HCTL_START(0) | + MDP4_LCDC_ACTIVE_HCTL_END(0)); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_ACTIVE_VSTART, 0); + mdp4_write(mdp4_kms, REG_MDP4_LCDC_ACTIVE_VEND, 0); +} + +static void mdp4_lcdc_encoder_disable(struct drm_encoder *encoder) +{ + struct drm_device *dev = encoder->dev; + struct mdp4_lcdc_encoder *mdp4_lcdc_encoder = + to_mdp4_lcdc_encoder(encoder); + struct mdp4_kms *mdp4_kms = get_kms(encoder); + struct drm_panel *panel; + int i, ret; + + if (WARN_ON(!mdp4_lcdc_encoder->enabled)) + return; + + mdp4_write(mdp4_kms, REG_MDP4_LCDC_ENABLE, 0); + + panel = of_drm_find_panel(mdp4_lcdc_encoder->panel_node); + if (panel) { + drm_panel_disable(panel); + drm_panel_unprepare(panel); + } + + /* + * 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); + + clk_disable_unprepare(mdp4_lcdc_encoder->lcdc_clk); + + for (i = 0; i < ARRAY_SIZE(mdp4_lcdc_encoder->regs); i++) { + ret = regulator_disable(mdp4_lcdc_encoder->regs[i]); + if (ret) + dev_err(dev->dev, "failed to disable regulator: %d\n", ret); + } + + bs_set(mdp4_lcdc_encoder, 0); + + mdp4_lcdc_encoder->enabled = false; +} + +static void mdp4_lcdc_encoder_enable(struct drm_encoder *encoder) +{ + struct drm_device *dev = encoder->dev; + struct mdp4_lcdc_encoder *mdp4_lcdc_encoder = + to_mdp4_lcdc_encoder(encoder); + unsigned long pc = mdp4_lcdc_encoder->pixclock; + struct mdp4_kms *mdp4_kms = get_kms(encoder); + struct drm_panel *panel; + int i, ret; + + if (WARN_ON(mdp4_lcdc_encoder->enabled)) + return; + + /* TODO: hard-coded for 18bpp: */ + mdp4_crtc_set_config(encoder->crtc, + MDP4_DMA_CONFIG_R_BPC(BPC6) | + MDP4_DMA_CONFIG_G_BPC(BPC6) | + MDP4_DMA_CONFIG_B_BPC(BPC6) | + MDP4_DMA_CONFIG_PACK_ALIGN_MSB | + MDP4_DMA_CONFIG_PACK(0x21) | + MDP4_DMA_CONFIG_DEFLKR_EN | + MDP4_DMA_CONFIG_DITHER_EN); + mdp4_crtc_set_intf(encoder->crtc, INTF_LCDC_DTV, 0); + + bs_set(mdp4_lcdc_encoder, 1); + + for (i = 0; i < ARRAY_SIZE(mdp4_lcdc_encoder->regs); i++) { + ret = regulator_enable(mdp4_lcdc_encoder->regs[i]); + if (ret) + dev_err(dev->dev, "failed to enable regulator: %d\n", ret); + } + + DBG("setting lcdc_clk=%lu", pc); + ret = clk_set_rate(mdp4_lcdc_encoder->lcdc_clk, pc); + if (ret) + dev_err(dev->dev, "failed to configure lcdc_clk: %d\n", ret); + ret = clk_prepare_enable(mdp4_lcdc_encoder->lcdc_clk); + if (ret) + dev_err(dev->dev, "failed to enable lcdc_clk: %d\n", ret); + + panel = of_drm_find_panel(mdp4_lcdc_encoder->panel_node); + if (panel) { + drm_panel_prepare(panel); + drm_panel_enable(panel); + } + + setup_phy(encoder); + + mdp4_write(mdp4_kms, REG_MDP4_LCDC_ENABLE, 1); + + mdp4_lcdc_encoder->enabled = true; +} + +static const struct drm_encoder_helper_funcs mdp4_lcdc_encoder_helper_funcs = { + .mode_set = mdp4_lcdc_encoder_mode_set, + .disable = mdp4_lcdc_encoder_disable, + .enable = mdp4_lcdc_encoder_enable, +}; + +long mdp4_lcdc_round_pixclk(struct drm_encoder *encoder, unsigned long rate) +{ + struct mdp4_lcdc_encoder *mdp4_lcdc_encoder = + to_mdp4_lcdc_encoder(encoder); + return clk_round_rate(mdp4_lcdc_encoder->lcdc_clk, rate); +} + +/* initialize encoder */ +struct drm_encoder *mdp4_lcdc_encoder_init(struct drm_device *dev, + struct device_node *panel_node) +{ + struct drm_encoder *encoder = NULL; + struct mdp4_lcdc_encoder *mdp4_lcdc_encoder; + struct regulator *reg; + int ret; + + mdp4_lcdc_encoder = kzalloc(sizeof(*mdp4_lcdc_encoder), GFP_KERNEL); + if (!mdp4_lcdc_encoder) { + ret = -ENOMEM; + goto fail; + } + + mdp4_lcdc_encoder->panel_node = panel_node; + + encoder = &mdp4_lcdc_encoder->base; + + drm_encoder_init(dev, encoder, &mdp4_lcdc_encoder_funcs, + DRM_MODE_ENCODER_LVDS, NULL); + drm_encoder_helper_add(encoder, &mdp4_lcdc_encoder_helper_funcs); + + /* TODO: do we need different pll in other cases? */ + mdp4_lcdc_encoder->lcdc_clk = mpd4_lvds_pll_init(dev); + if (IS_ERR(mdp4_lcdc_encoder->lcdc_clk)) { + dev_err(dev->dev, "failed to get lvds_clk\n"); + ret = PTR_ERR(mdp4_lcdc_encoder->lcdc_clk); + goto fail; + } + + /* TODO: different regulators in other cases? */ + reg = devm_regulator_get(dev->dev, "lvds-vccs-3p3v"); + if (IS_ERR(reg)) { + ret = PTR_ERR(reg); + dev_err(dev->dev, "failed to get lvds-vccs-3p3v: %d\n", ret); + goto fail; + } + mdp4_lcdc_encoder->regs[0] = reg; + + reg = devm_regulator_get(dev->dev, "lvds-pll-vdda"); + if (IS_ERR(reg)) { + ret = PTR_ERR(reg); + dev_err(dev->dev, "failed to get lvds-pll-vdda: %d\n", ret); + goto fail; + } + mdp4_lcdc_encoder->regs[1] = reg; + + reg = devm_regulator_get(dev->dev, "lvds-vdda"); + if (IS_ERR(reg)) { + ret = PTR_ERR(reg); + dev_err(dev->dev, "failed to get lvds-vdda: %d\n", ret); + goto fail; + } + mdp4_lcdc_encoder->regs[2] = reg; + + bs_init(mdp4_lcdc_encoder); + + return encoder; + +fail: + if (encoder) + mdp4_lcdc_encoder_destroy(encoder); + + return ERR_PTR(ret); +} |