250 lines
7.3 KiB
C
250 lines
7.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright © 2018-2020 Intel Corporation
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*/
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#include <linux/clk.h>
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#include <drm/drm_atomic.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_crtc.h>
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#include <drm/drm_crtc_helper.h>
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#include <drm/drm_print.h>
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#include <drm/drm_vblank.h>
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#include <drm/drm_modeset_helper_vtables.h>
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#include "kmb_drv.h"
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#include "kmb_dsi.h"
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#include "kmb_plane.h"
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#include "kmb_regs.h"
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struct kmb_crtc_timing {
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u32 vfront_porch;
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u32 vback_porch;
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u32 vsync_len;
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u32 hfront_porch;
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u32 hback_porch;
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u32 hsync_len;
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};
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static int kmb_crtc_enable_vblank(struct drm_crtc *crtc)
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{
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struct drm_device *dev = crtc->dev;
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struct kmb_drm_private *kmb = to_kmb(dev);
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/* Clear interrupt */
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kmb_write_lcd(kmb, LCD_INT_CLEAR, LCD_INT_VERT_COMP);
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/* Set which interval to generate vertical interrupt */
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kmb_write_lcd(kmb, LCD_VSTATUS_COMPARE,
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LCD_VSTATUS_COMPARE_VSYNC);
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/* Enable vertical interrupt */
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kmb_set_bitmask_lcd(kmb, LCD_INT_ENABLE,
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LCD_INT_VERT_COMP);
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return 0;
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}
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static void kmb_crtc_disable_vblank(struct drm_crtc *crtc)
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{
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struct drm_device *dev = crtc->dev;
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struct kmb_drm_private *kmb = to_kmb(dev);
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/* Clear interrupt */
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kmb_write_lcd(kmb, LCD_INT_CLEAR, LCD_INT_VERT_COMP);
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/* Disable vertical interrupt */
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kmb_clr_bitmask_lcd(kmb, LCD_INT_ENABLE,
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LCD_INT_VERT_COMP);
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}
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static const struct drm_crtc_funcs kmb_crtc_funcs = {
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.destroy = drm_crtc_cleanup,
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.set_config = drm_atomic_helper_set_config,
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.page_flip = drm_atomic_helper_page_flip,
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.reset = drm_atomic_helper_crtc_reset,
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.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
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.enable_vblank = kmb_crtc_enable_vblank,
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.disable_vblank = kmb_crtc_disable_vblank,
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};
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static void kmb_crtc_set_mode(struct drm_crtc *crtc,
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struct drm_atomic_state *old_state)
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{
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struct drm_device *dev = crtc->dev;
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struct drm_display_mode *m = &crtc->state->adjusted_mode;
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struct kmb_crtc_timing vm;
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struct kmb_drm_private *kmb = to_kmb(dev);
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unsigned int val = 0;
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/* Initialize mipi */
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kmb_dsi_mode_set(kmb->kmb_dsi, m, kmb->sys_clk_mhz, old_state);
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drm_info(dev,
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"vfp= %d vbp= %d vsync_len=%d hfp=%d hbp=%d hsync_len=%d\n",
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m->crtc_vsync_start - m->crtc_vdisplay,
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m->crtc_vtotal - m->crtc_vsync_end,
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m->crtc_vsync_end - m->crtc_vsync_start,
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m->crtc_hsync_start - m->crtc_hdisplay,
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m->crtc_htotal - m->crtc_hsync_end,
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m->crtc_hsync_end - m->crtc_hsync_start);
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val = kmb_read_lcd(kmb, LCD_INT_ENABLE);
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kmb_clr_bitmask_lcd(kmb, LCD_INT_ENABLE, val);
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kmb_set_bitmask_lcd(kmb, LCD_INT_CLEAR, ~0x0);
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vm.vfront_porch = 2;
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vm.vback_porch = 2;
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vm.vsync_len = 8;
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vm.hfront_porch = 0;
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vm.hback_porch = 0;
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vm.hsync_len = 28;
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drm_dbg(dev, "%s : %dactive height= %d vbp=%d vfp=%d vsync-w=%d h-active=%d h-bp=%d h-fp=%d hsync-l=%d",
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__func__, __LINE__,
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m->crtc_vdisplay, vm.vback_porch, vm.vfront_porch,
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vm.vsync_len, m->crtc_hdisplay, vm.hback_porch,
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vm.hfront_porch, vm.hsync_len);
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kmb_write_lcd(kmb, LCD_V_ACTIVEHEIGHT,
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m->crtc_vdisplay - 1);
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kmb_write_lcd(kmb, LCD_V_BACKPORCH, vm.vback_porch);
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kmb_write_lcd(kmb, LCD_V_FRONTPORCH, vm.vfront_porch);
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kmb_write_lcd(kmb, LCD_VSYNC_WIDTH, vm.vsync_len - 1);
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kmb_write_lcd(kmb, LCD_H_ACTIVEWIDTH,
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m->crtc_hdisplay - 1);
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kmb_write_lcd(kmb, LCD_H_BACKPORCH, vm.hback_porch);
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kmb_write_lcd(kmb, LCD_H_FRONTPORCH, vm.hfront_porch);
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kmb_write_lcd(kmb, LCD_HSYNC_WIDTH, vm.hsync_len - 1);
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/* This is hardcoded as 0 in the Myriadx code */
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kmb_write_lcd(kmb, LCD_VSYNC_START, 0);
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kmb_write_lcd(kmb, LCD_VSYNC_END, 0);
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/* Back ground color */
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kmb_write_lcd(kmb, LCD_BG_COLOUR_LS, 0x4);
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if (m->flags == DRM_MODE_FLAG_INTERLACE) {
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kmb_write_lcd(kmb,
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LCD_VSYNC_WIDTH_EVEN, vm.vsync_len - 1);
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kmb_write_lcd(kmb,
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LCD_V_BACKPORCH_EVEN, vm.vback_porch);
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kmb_write_lcd(kmb,
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LCD_V_FRONTPORCH_EVEN, vm.vfront_porch);
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kmb_write_lcd(kmb, LCD_V_ACTIVEHEIGHT_EVEN,
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m->crtc_vdisplay - 1);
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/* This is hardcoded as 10 in the Myriadx code */
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kmb_write_lcd(kmb, LCD_VSYNC_START_EVEN, 10);
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kmb_write_lcd(kmb, LCD_VSYNC_END_EVEN, 10);
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}
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kmb_write_lcd(kmb, LCD_TIMING_GEN_TRIG, 1);
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kmb_set_bitmask_lcd(kmb, LCD_CONTROL, LCD_CTRL_ENABLE);
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kmb_set_bitmask_lcd(kmb, LCD_INT_ENABLE, val);
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}
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static void kmb_crtc_atomic_enable(struct drm_crtc *crtc,
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struct drm_atomic_state *state)
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{
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struct kmb_drm_private *kmb = crtc_to_kmb_priv(crtc);
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clk_prepare_enable(kmb->kmb_clk.clk_lcd);
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kmb_crtc_set_mode(crtc, state);
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drm_crtc_vblank_on(crtc);
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}
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static void kmb_crtc_atomic_disable(struct drm_crtc *crtc,
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struct drm_atomic_state *state)
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{
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struct kmb_drm_private *kmb = crtc_to_kmb_priv(crtc);
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struct drm_crtc_state *old_state = drm_atomic_get_old_crtc_state(state, crtc);
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/* due to hw limitations, planes need to be off when crtc is off */
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drm_atomic_helper_disable_planes_on_crtc(old_state, false);
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drm_crtc_vblank_off(crtc);
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clk_disable_unprepare(kmb->kmb_clk.clk_lcd);
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}
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static void kmb_crtc_atomic_begin(struct drm_crtc *crtc,
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struct drm_atomic_state *state)
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{
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struct drm_device *dev = crtc->dev;
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struct kmb_drm_private *kmb = to_kmb(dev);
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kmb_clr_bitmask_lcd(kmb, LCD_INT_ENABLE,
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LCD_INT_VERT_COMP);
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}
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static void kmb_crtc_atomic_flush(struct drm_crtc *crtc,
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struct drm_atomic_state *state)
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{
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struct drm_device *dev = crtc->dev;
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struct kmb_drm_private *kmb = to_kmb(dev);
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kmb_set_bitmask_lcd(kmb, LCD_INT_ENABLE,
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LCD_INT_VERT_COMP);
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spin_lock_irq(&crtc->dev->event_lock);
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if (crtc->state->event) {
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if (drm_crtc_vblank_get(crtc) == 0)
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drm_crtc_arm_vblank_event(crtc, crtc->state->event);
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else
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drm_crtc_send_vblank_event(crtc, crtc->state->event);
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}
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crtc->state->event = NULL;
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spin_unlock_irq(&crtc->dev->event_lock);
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}
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static enum drm_mode_status
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kmb_crtc_mode_valid(struct drm_crtc *crtc,
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const struct drm_display_mode *mode)
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{
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int refresh;
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struct drm_device *dev = crtc->dev;
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int vfp = mode->vsync_start - mode->vdisplay;
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if (mode->vdisplay < KMB_CRTC_MAX_HEIGHT) {
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drm_dbg(dev, "height = %d less than %d",
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mode->vdisplay, KMB_CRTC_MAX_HEIGHT);
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return MODE_BAD_VVALUE;
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}
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if (mode->hdisplay < KMB_CRTC_MAX_WIDTH) {
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drm_dbg(dev, "width = %d less than %d",
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mode->hdisplay, KMB_CRTC_MAX_WIDTH);
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return MODE_BAD_HVALUE;
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}
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refresh = drm_mode_vrefresh(mode);
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if (refresh < KMB_MIN_VREFRESH || refresh > KMB_MAX_VREFRESH) {
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drm_dbg(dev, "refresh = %d less than %d or greater than %d",
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refresh, KMB_MIN_VREFRESH, KMB_MAX_VREFRESH);
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return MODE_BAD;
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}
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if (vfp < KMB_CRTC_MIN_VFP) {
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drm_dbg(dev, "vfp = %d less than %d", vfp, KMB_CRTC_MIN_VFP);
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return MODE_BAD;
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}
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return MODE_OK;
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}
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static const struct drm_crtc_helper_funcs kmb_crtc_helper_funcs = {
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.atomic_begin = kmb_crtc_atomic_begin,
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.atomic_enable = kmb_crtc_atomic_enable,
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.atomic_disable = kmb_crtc_atomic_disable,
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.atomic_flush = kmb_crtc_atomic_flush,
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.mode_valid = kmb_crtc_mode_valid,
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};
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int kmb_setup_crtc(struct drm_device *drm)
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{
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struct kmb_drm_private *kmb = to_kmb(drm);
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struct kmb_plane *primary;
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int ret;
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primary = kmb_plane_init(drm);
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if (IS_ERR(primary))
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return PTR_ERR(primary);
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ret = drm_crtc_init_with_planes(drm, &kmb->crtc, &primary->base_plane,
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NULL, &kmb_crtc_funcs, NULL);
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if (ret) {
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kmb_plane_destroy(&primary->base_plane);
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return ret;
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}
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drm_crtc_helper_add(&kmb->crtc, &kmb_crtc_helper_funcs);
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return 0;
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}
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