rockchip/rk3399: display: Do not allocate framebuffer in coreboot

framebuffer address is dynamically chosen by libpayload now, so there's
no need to configure it in coreboot.

CQ-DEPEND=CL:401402
BUG=chrome-os-partner:58675
BRANCH=none
TEST=Boot from kevin, dev screen is visible

Change-Id: I9f1e581d5c63b3579b26be22ce5c8d1e71679f6f
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: b3b6675420592c30e1e0abc8f8e9dd6ed5abd04c
Original-Change-Id: I7e3162f24a4dc426fe4e10d74865cf0042c80db5
Original-Signed-off-by: Lin Huang <hl@rock-chips.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/401401
Original-Commit-Ready: Julius Werner <jwerner@chromium.org>
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://review.coreboot.org/17109
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

src/mainboard/google/gru/devicetree.cb

@@ -15,7 +15,6 @@
 
 chip soc/rockchip/rk3399
 	device cpu_cluster 0 on end
-	register "vop_id" = "0"
 	register "vop_mode" = "VOP_MODE_EDP"
 	register "framebuffer_bits_per_pixel" = "32"
 end

src/soc/rockchip/common/include/soc/vop.h

@@ -376,5 +376,6 @@ enum vop_modes {
 #define V_VASP(x)		(((x)&0x1fff)<<16)
 
 void rkvop_mode_set(u32 vop_id, const struct edid *edid, u32 mode);
-void rkvop_enable(u32 vop_id, u32 fbbase, const struct edid *edid);
+void rkvop_prepare(u32 vop_id, const struct edid *edid);
+void rkvop_enable(u32 vop_id, u32 fbbase);
 #endif

src/soc/rockchip/common/vop.c

@@ -30,7 +30,19 @@ static struct rockchip_vop_regs * const vop_regs[] = {
 	(struct rockchip_vop_regs *)VOP_LIT_BASE
 };
 
-void rkvop_enable(u32 vop_id, u32 fbbase, const struct edid *edid)
+void rkvop_enable(u32 vop_id, u32 fbbase)
+{
+	struct rockchip_vop_regs *preg = vop_regs[vop_id];
+
+	write32(&preg->win0_yrgb_mst, fbbase);
+
+	/* On RK3288, the reg_cfg_done[1:31] is reserved and read-only,
+	 * but it's fine to write to it
+	 */
+	write32(&preg->reg_cfg_done, 0xffff); /* enable reg config */
+}
+
+void rkvop_prepare(u32 vop_id, const struct edid *edid)
 {
 	u32 lb_mode;
 	u32 rgb_mode;
@@ -85,13 +97,6 @@ void rkvop_enable(u32 vop_id, u32 fbbase, const struct edid *edid)
 			M_WIN0_LB_MODE | M_WIN0_DATA_FMT | M_WIN0_EN,
 			V_WIN0_LB_MODE(lb_mode) |
 			V_WIN0_DATA_FMT(rgb_mode) | V_WIN0_EN(1));
-
-	write32(&preg->win0_yrgb_mst, fbbase);
-
-	/* On RK3288, the reg_cfg_done[1:31] is reserved and read-only,
-	 * but it's fine to write to it
-	 */
-	write32(&preg->reg_cfg_done, 0xffff); /* enable reg config */
 }
 
 void rkvop_mode_set(u32 vop_id, const struct edid *edid, u32 mode)

src/soc/rockchip/rk3288/display.c

@@ -108,7 +108,8 @@ void rk_display_init(device_t dev, u32 lcdbase,
 		conf->framebuffer_bits_per_pixel, 0);
 	rkvop_mode_set(conf->vop_id, &edid, detected_mode);
 
-	rkvop_enable(conf->vop_id, lcdbase, &edid);
+	rkvop_prepare(conf->vop_id, &edid);
+	rkvop_enable(conf->vop_id, lcdbase);
 
 	switch (detected_mode) {
 	case VOP_MODE_HDMI:

src/soc/rockchip/rk3399/chip.h

@@ -20,7 +20,6 @@
 #include <soc/vop.h>	/* for vop_modes enum used in devicetree.cb */
 
 struct soc_rockchip_rk3399_config {
-	u32 vop_id;
 	gpio_t lcd_bl_pwm_gpio;
 	gpio_t lcd_bl_en_gpio;
 	u32 bl_power_on_udelay;

src/soc/rockchip/rk3399/display.c

@@ -36,20 +36,14 @@
 
 #include "chip.h"
 
-void rk_display_init(device_t dev, uintptr_t lcdbase,
+void rk_display_init(device_t dev)
-		     unsigned long fb_size)
 {
 	struct edid edid;
-	uint32_t val;
 	struct soc_rockchip_rk3399_config *conf = dev->chip_info;
-	uintptr_t lower = ALIGN_DOWN(lcdbase, MiB);
-	uintptr_t upper = ALIGN_UP(lcdbase + fb_size, MiB);
 	enum vop_modes detected_mode = VOP_MODE_UNKNOWN;
 
-	printk(BIOS_DEBUG, "LCD framebuffer @%p\n", (void *)(lcdbase));
+	/* let's use vop0 in rk3399 */
-	memset((void *)lcdbase, 0, fb_size);	/* clear the framebuffer */
+	uint32_t vop_id = 0;
-	dcache_clean_invalidate_by_mva((void *)lower, upper - lower);
-	mmu_config_range((void *)lower, upper - lower, UNCACHED_MEM);
 
 	switch (conf->vop_mode) {
 	case VOP_MODE_NONE:
@@ -58,12 +52,10 @@ void rk_display_init(device_t dev, uintptr_t lcdbase,
 		/* try EDP first, then HDMI */
 	case VOP_MODE_EDP:
 		printk(BIOS_DEBUG, "Attempting to set up EDP display.\n");
-		rkclk_configure_vop_aclk(conf->vop_id, 192 * MHz);
+		rkclk_configure_vop_aclk(vop_id, 192 * MHz);
 
-		/* select edp signal from vop0(big) or vop1(little) */
+		/* select edp signal from vop0 */
-		val = (conf->vop_id == 1) ? RK_SETBITS(1 << 5) :
+		write32(&rk3399_grf->soc_con20, RK_CLRBITS(1 << 5));
-					    RK_CLRBITS(1 << 5);
-		write32(&rk3399_grf->soc_con20, val);
 
 		/* select edp clk from SoC internal 24M crystal, otherwise,
 		 * it will source from edp's 24M clock (that depends on
@@ -89,7 +81,7 @@ void rk_display_init(device_t dev, uintptr_t lcdbase,
 		return;
 	}
 
-	if (rkclk_configure_vop_dclk(conf->vop_id,
+	if (rkclk_configure_vop_dclk(vop_id,
 				     edid.mode.pixel_clock * KHz)) {
 		printk(BIOS_WARNING, "config vop err\n");
 		return;
@@ -97,9 +89,9 @@ void rk_display_init(device_t dev, uintptr_t lcdbase,
 
 	edid_set_framebuffer_bits_per_pixel(&edid,
 		conf->framebuffer_bits_per_pixel, 0);
-	rkvop_mode_set(conf->vop_id, &edid, detected_mode);
+	rkvop_mode_set(vop_id, &edid, detected_mode);
 
-	rkvop_enable(conf->vop_id, lcdbase, &edid);
+	rkvop_prepare(vop_id, &edid);
 
 	switch (detected_mode) {
 	case VOP_MODE_HDMI:
@@ -115,5 +107,5 @@ void rk_display_init(device_t dev, uintptr_t lcdbase,
 		break;
 	}
 
-	set_vbe_mode_info_valid(&edid, (uintptr_t)lcdbase);
+	set_vbe_mode_info_valid(&edid, (uintptr_t)0);
 }

src/soc/rockchip/rk3399/include/soc/display.h

@@ -18,8 +18,7 @@
 
 #define REF_CLK_24M (0x1 << 0)
 
-void rk_display_init(device_t dev, uintptr_t lcdbase,
+void rk_display_init(device_t dev);
-		     unsigned long fb_size);
 void mainboard_power_on_backlight(void);
 
 #endif

src/soc/rockchip/rk3399/include/soc/memlayout.ld

@@ -22,7 +22,6 @@ SECTIONS
 	POSTRAM_CBFS_CACHE(0x00100000, 1M)
 	RAMSTAGE(0x00300000, 256K)
 	DMA_COHERENT(0x10000000, 2M)
-	FRAMEBUFFER(0x10200000, 16M)
 
 	/* 8K of special SRAM in PMU power domain. */
 	SYMBOL(pmu_sram, 0xFF3B0000)

src/soc/rockchip/rk3399/soc.c

@@ -39,8 +39,7 @@ static void soc_init(device_t dev)
 	mmio_resource(dev, 1, (0x10000 / KiB), (0x80000 / KiB));
 
 	if (IS_ENABLED(CONFIG_MAINBOARD_DO_NATIVE_VGA_INIT) && display_init_required())
-		rk_display_init(dev, (uintptr_t)_framebuffer,
+		rk_display_init(dev);
-				_framebuffer_size);
 	else
 		printk(BIOS_INFO, "Display initialization disabled.\n");