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path: root/drivers/video/tidss/tidss_drv.c
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Diffstat (limited to 'drivers/video/tidss/tidss_drv.c')
-rw-r--r--drivers/video/tidss/tidss_drv.c943
1 files changed, 943 insertions, 0 deletions
diff --git a/drivers/video/tidss/tidss_drv.c b/drivers/video/tidss/tidss_drv.c
new file mode 100644
index 0000000000..078e3e82e3
--- /dev/null
+++ b/drivers/video/tidss/tidss_drv.c
@@ -0,0 +1,943 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2023 Texas Instruments Incorporated - https://www.ti.com/
+ * Nikhil M Jain, n-jain1@ti.com
+ *
+ * based on the linux tidss driver, which is
+ *
+ * (C) Copyright 2018 Texas Instruments Incorporated - https://www.ti.com/
+ * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <clk.h>
+#include <log.h>
+#include <video.h>
+#include <errno.h>
+#include <panel.h>
+#include <reset.h>
+#include <malloc.h>
+#include <fdtdec.h>
+#include <syscon.h>
+#include <regmap.h>
+#include <cpu_func.h>
+#include <media_bus_format.h>
+
+#include <asm/io.h>
+#include <asm/cache.h>
+#include <asm/utils.h>
+#include <asm/bitops.h>
+
+#include <dm/devres.h>
+#include <dm/of_access.h>
+#include <dm/device_compat.h>
+#include <dm/device-internal.h>
+
+#include <linux/bug.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/iopoll.h>
+
+#include "tidss_drv.h"
+#include "tidss_regs.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/* Panel parameters */
+enum {
+ LCD_MAX_WIDTH = 1920,
+ LCD_MAX_HEIGHT = 1200,
+ LCD_MAX_LOG2_BPP = VIDEO_BPP32,
+};
+
+static const u16 *dss_common_regmap;
+
+static const u16 tidss_am62x_common_regs[DSS_COMMON_REG_TABLE_LEN] = {
+ [DSS_REVISION_OFF] = 0x4,
+ [DSS_SYSCONFIG_OFF] = 0x8,
+ [DSS_SYSSTATUS_OFF] = 0x20,
+ [DSS_IRQ_EOI_OFF] = 0x24,
+ [DSS_IRQSTATUS_RAW_OFF] = 0x28,
+ [DSS_IRQSTATUS_OFF] = 0x2c,
+ [DSS_IRQENABLE_SET_OFF] = 0x30,
+ [DSS_IRQENABLE_CLR_OFF] = 0x40,
+ [DSS_VID_IRQENABLE_OFF] = 0x44,
+ [DSS_VID_IRQSTATUS_OFF] = 0x58,
+ [DSS_VP_IRQENABLE_OFF] = 0x70,
+ [DSS_VP_IRQSTATUS_OFF] = 0x7c,
+
+ [WB_IRQENABLE_OFF] = 0x88,
+ [WB_IRQSTATUS_OFF] = 0x8c,
+
+ [DSS_GLOBAL_MFLAG_ATTRIBUTE_OFF] = 0x90,
+ [DSS_GLOBAL_OUTPUT_ENABLE_OFF] = 0x94,
+ [DSS_GLOBAL_BUFFER_OFF] = 0x98,
+ [DSS_CBA_CFG_OFF] = 0x9c,
+ [DSS_DBG_CONTROL_OFF] = 0xa0,
+ [DSS_DBG_STATUS_OFF] = 0xa4,
+ [DSS_CLKGATING_DISABLE_OFF] = 0xa8,
+ [DSS_SECURE_DISABLE_OFF] = 0xac,
+};
+
+/* TIDSS AM62x Features */
+const struct dss_features dss_am625_feats = {
+ .max_pclk_khz = {
+ [DSS_VP_DPI] = 165000,
+ [DSS_VP_OLDI] = 165000,
+ },
+
+ .subrev = DSS_AM625,
+
+ .common = "common",
+ .common_regs = tidss_am62x_common_regs,
+
+ .num_vps = 2,
+ .vp_name = { "vp1", "vp2" },
+ .ovr_name = { "ovr1", "ovr2" },
+ .vpclk_name = { "vp1", "vp2" },
+ .vp_bus_type = { DSS_VP_OLDI, DSS_VP_DPI },
+
+ .vp_feat = { .color = {
+ .has_ctm = true,
+ .gamma_size = 256,
+ .gamma_type = TIDSS_GAMMA_8BIT,
+ },
+ },
+
+ .num_planes = 2,
+ /* note: vid is plane_id 0 and vidl1 is plane_id 1 */
+ .vid_name = { "vidl1", "vid1" },
+ .vid_lite = { true, false },
+ .vid_order = { 1, 0 },
+};
+
+/* Wrapper functions to write and read TI_DSS registers */
+static void dss_write(struct tidss_drv_priv *priv, u16 reg, u32 val)
+{
+ writel(val, priv->base_common + reg);
+}
+
+static u32 dss_read(struct tidss_drv_priv *priv, u16 reg)
+{
+ return readl(priv->base_common + reg);
+}
+
+static void dss_vid_write(struct tidss_drv_priv *priv, u32 hw_plane, u16 reg, u32 val)
+{
+ void __iomem *base = priv->base_vid[hw_plane];
+
+ writel(val, base + reg);
+}
+
+static u32 dss_vid_read(struct tidss_drv_priv *priv, u32 hw_plane, u16 reg)
+{
+ void __iomem *base = priv->base_vid[hw_plane];
+
+ return readl(base + reg);
+}
+
+static void dss_ovr_write(struct tidss_drv_priv *priv, u32 hw_videoport,
+ u16 reg, u32 val)
+{
+ void __iomem *base = priv->base_ovr[hw_videoport];
+
+ writel(val, base + reg);
+}
+
+static u32 dss_ovr_read(struct tidss_drv_priv *priv, u32 hw_videoport, u16 reg)
+{
+ void __iomem *base = priv->base_ovr[hw_videoport];
+
+ return readl(base + reg);
+}
+
+static void dss_vp_write(struct tidss_drv_priv *priv, u32 hw_videoport,
+ u16 reg, u32 val)
+{
+ void __iomem *base = priv->base_vp[hw_videoport];
+
+ writel(val, base + reg);
+}
+
+static u32 dss_vp_read(struct tidss_drv_priv *priv, u32 hw_videoport, u16 reg)
+{
+ void __iomem *base = priv->base_vp[hw_videoport];
+
+ return readl(base + reg);
+}
+
+/* generate mask on a register */
+static u32 FLD_MASK(u32 start, u32 end)
+{
+ return ((1 << (start - end + 1)) - 1) << end;
+}
+
+/* set the given val in specified range */
+static u32 FLD_VAL(u32 val, u32 start, u32 end)
+{
+ return (val << end) & FLD_MASK(start, end);
+}
+
+/* return the value in the specified range */
+static u32 FLD_GET(u32 val, u32 start, u32 end)
+{
+ return (val & FLD_MASK(start, end)) >> end;
+}
+
+/* modify the value of the specified range */
+static u32 FLD_MOD(u32 orig, u32 val, u32 start, u32 end)
+{
+ return (orig & ~FLD_MASK(start, end)) | FLD_VAL(val, start, end);
+}
+
+/* read and modify common register region of DSS*/
+__maybe_unused
+static u32 REG_GET(struct tidss_drv_priv *priv, u32 idx, u32 start, u32 end)
+{
+ return FLD_GET(dss_read(priv, idx), start, end);
+}
+
+static void REG_FLD_MOD(struct tidss_drv_priv *priv, u32 idx, u32 val,
+ u32 start, u32 end)
+{
+ dss_write(priv, idx, FLD_MOD(dss_read(priv, idx), val,
+ start, end));
+}
+
+/* read and modify planes vid1 and vid2 register of DSS*/
+static u32 VID_REG_GET(struct tidss_drv_priv *priv, u32 hw_plane, u32 idx,
+ u32 start, u32 end)
+{
+ return FLD_GET(dss_vid_read(priv, hw_plane, idx), start, end);
+}
+
+static void VID_REG_FLD_MOD(struct tidss_drv_priv *priv, u32 hw_plane, u32 idx,
+ u32 val, u32 start, u32 end)
+{
+ dss_vid_write(priv, hw_plane, idx,
+ FLD_MOD(dss_vid_read(priv, hw_plane, idx),
+ val, start, end));
+}
+
+/* read and modify port vid1 and vid2 registers of DSS*/
+__maybe_unused
+static u32 VP_REG_GET(struct tidss_drv_priv *priv, u32 vp, u32 idx,
+ u32 start, u32 end)
+{
+ return FLD_GET(dss_vp_read(priv, vp, idx), start, end);
+}
+
+static void VP_REG_FLD_MOD(struct tidss_drv_priv *priv, u32 vp, u32 idx, u32 val,
+ u32 start, u32 end)
+{
+ dss_vp_write(priv, vp, idx, FLD_MOD(dss_vp_read(priv, vp, idx),
+ val, start, end));
+}
+
+/* read and modify overlay ovr1 and ovr2 registers of DSS*/
+__maybe_unused
+static u32 OVR_REG_GET(struct tidss_drv_priv *priv, u32 ovr, u32 idx,
+ u32 start, u32 end)
+{
+ return FLD_GET(dss_ovr_read(priv, ovr, idx), start, end);
+}
+
+static void OVR_REG_FLD_MOD(struct tidss_drv_priv *priv, u32 ovr, u32 idx,
+ u32 val, u32 start, u32 end)
+{
+ dss_ovr_write(priv, ovr, idx, FLD_MOD(dss_ovr_read(priv, ovr, idx),
+ val, start, end));
+}
+
+static void dss_oldi_tx_power(struct tidss_drv_priv *priv, bool power)
+{
+ u32 val;
+
+ if (WARN_ON(!priv->oldi_io_ctrl))
+ return;
+
+ if (priv->feat->subrev == DSS_AM625) {
+ if (power) {
+ switch (priv->oldi_mode) {
+ case OLDI_SINGLE_LINK_SINGLE_MODE:
+ /* Power down OLDI TX 1 */
+ val = OLDI1_PWRDN_TX;
+ break;
+ case OLDI_DUAL_LINK:
+ /* No Power down */
+ val = 0;
+ break;
+ default:
+ /* Power down both the OLDI TXes */
+ val = OLDI_BANDGAP_PWR | OLDI0_PWRDN_TX | OLDI1_PWRDN_TX;
+ break;
+ }
+ } else {
+ val = OLDI_BANDGAP_PWR | OLDI0_PWRDN_TX | OLDI1_PWRDN_TX;
+ }
+ regmap_update_bits(priv->oldi_io_ctrl, OLDI_PD_CTRL,
+ OLDI_BANDGAP_PWR | OLDI0_PWRDN_TX | OLDI1_PWRDN_TX, val);
+ }
+}
+
+static void dss_set_num_datalines(struct tidss_drv_priv *priv,
+ u32 hw_videoport)
+{
+ int v;
+ u32 num_lines = priv->bus_format->data_width;
+
+ switch (num_lines) {
+ case 12:
+ v = 0; break;
+ case 16:
+ v = 1; break;
+ case 18:
+ v = 2; break;
+ case 24:
+ v = 3; break;
+ case 30:
+ v = 4; break;
+ case 36:
+ v = 5; break;
+ default:
+ WARN_ON(1);
+ v = 3;
+ }
+
+ VP_REG_FLD_MOD(priv, hw_videoport, DSS_VP_CONTROL, v, 10, 8);
+}
+
+static void dss_enable_oldi(struct tidss_drv_priv *priv, u32 hw_videoport)
+{
+ u32 oldi_cfg = 0;
+ u32 oldi_reset_bit = BIT(5 + hw_videoport);
+ int count = 0;
+
+ /*
+ * For the moment MASTERSLAVE, and SRC bits of DSS_VP_DSS_OLDI_CFG are
+ * set statically to 0.
+ */
+
+ if (priv->bus_format->data_width == 24)
+ oldi_cfg |= BIT(8); /* MSB */
+ else if (priv->bus_format->data_width != 18)
+ dev_warn(priv->dev, "%s: %d port width not supported\n",
+ __func__, priv->bus_format->data_width);
+
+ oldi_cfg |= BIT(7); /* DEPOL */
+
+ oldi_cfg = FLD_MOD(oldi_cfg, priv->bus_format->oldi_mode_reg_val, 3, 1);
+
+ oldi_cfg |= BIT(12); /* SOFTRST */
+
+ oldi_cfg |= BIT(0); /* ENABLE */
+
+ switch (priv->oldi_mode) {
+ case OLDI_MODE_OFF:
+ oldi_cfg &= ~BIT(0); /* DISABLE */
+ break;
+
+ case OLDI_SINGLE_LINK_SINGLE_MODE:
+ /* All configuration is done for this mode. */
+ break;
+
+ case OLDI_SINGLE_LINK_DUPLICATE_MODE:
+ oldi_cfg |= BIT(5); /* DUPLICATE MODE */
+ break;
+
+ case OLDI_DUAL_LINK:
+ oldi_cfg |= BIT(11); /* DUALMODESYNC */
+ oldi_cfg |= BIT(3); /* data-mapping field also indicates dual-link mode */
+ break;
+
+ default:
+ dev_warn(priv->dev, "%s: Incorrect oldi mode. Returning.\n",
+ __func__);
+ return;
+ }
+
+ dss_vp_write(priv, hw_videoport, DSS_VP_DSS_OLDI_CFG, oldi_cfg);
+
+ while (!(oldi_reset_bit & dss_read(priv, DSS_SYSSTATUS)) &&
+ count < 10000)
+ count++;
+
+ if (!(oldi_reset_bit & dss_read(priv, DSS_SYSSTATUS)))
+ dev_warn(priv->dev, "%s: timeout waiting OLDI reset done\n",
+ __func__);
+}
+
+static const struct dss_color_lut dss_vp_gamma_default_lut[] = {
+ { .red = 0, .green = 0, .blue = 0, },
+ { .red = U16_MAX, .green = U16_MAX, .blue = U16_MAX, },
+};
+
+static void dss_vp_write_gamma_table(struct tidss_drv_priv *priv,
+ u32 hw_videoport)
+{
+ u32 *table = priv->vp_data[hw_videoport].gamma_table;
+ u32 hwlen = priv->feat->vp_feat.color.gamma_size;
+ unsigned int i;
+
+ dev_dbg(priv->dev, "%s: hw_videoport %d\n", __func__, hw_videoport);
+
+ for (i = 0; i < hwlen; ++i) {
+ u32 v = table[i];
+
+ v |= i << 24;
+
+ dss_vp_write(priv, hw_videoport, DSS_VP_GAMMA_TABLE, v);
+ }
+}
+
+static void dss_vp_set_gamma(struct tidss_drv_priv *priv,
+ u32 hw_videoport, const struct dss_color_lut *lut,
+ unsigned int length)
+{
+ u32 *table = priv->vp_data[hw_videoport].gamma_table;
+ u32 hwlen = priv->feat->vp_feat.color.gamma_size;
+ u32 hwbits;
+ unsigned int i;
+
+ dev_dbg(priv->dev, "%s: hw_videoport %d, lut len %u, hw len %u\n",
+ __func__, hw_videoport, length, hwlen);
+
+ if (priv->feat->vp_feat.color.gamma_type == TIDSS_GAMMA_10BIT)
+ hwbits = 10;
+ else
+ hwbits = 8;
+
+ lut = dss_vp_gamma_default_lut;
+ length = ARRAY_SIZE(dss_vp_gamma_default_lut);
+
+ for (i = 0; i < length - 1; ++i) {
+ unsigned int first = i * (hwlen - 1) / (length - 1);
+ unsigned int last = (i + 1) * (hwlen - 1) / (length - 1);
+ unsigned int w = last - first;
+ u16 r, g, b;
+ unsigned int j;
+
+ if (w == 0)
+ continue;
+
+ for (j = 0; j <= w; j++) {
+ r = (lut[i].red * (w - j) + lut[i + 1].red * j) / w;
+ g = (lut[i].green * (w - j) + lut[i + 1].green * j) / w;
+ b = (lut[i].blue * (w - j) + lut[i + 1].blue * j) / w;
+
+ r >>= 16 - hwbits;
+ g >>= 16 - hwbits;
+ b >>= 16 - hwbits;
+
+ table[first + j] = (r << (hwbits * 2)) |
+ (g << hwbits) | b;
+ }
+ }
+
+ dss_vp_write_gamma_table(priv, hw_videoport);
+}
+
+void dss_vp_enable(struct tidss_drv_priv *priv, u32 hw_videoport, struct display_timing *timing)
+{
+ bool align, onoff, rf, ieo, ipc, ihs, ivs;
+ u32 hsw, hfp, hbp, vsw, vfp, vbp;
+
+ dss_set_num_datalines(priv, hw_videoport);
+
+ /* panel parameters to set clocks for video port*/
+ hfp = timing->hfront_porch.typ;
+ hsw = timing->hsync_len.typ;
+ hbp = timing->hback_porch.typ;
+ vfp = timing->vfront_porch.typ;
+ vsw = timing->vsync_len.typ;
+ vbp = timing->vback_porch.typ;
+
+ dss_vp_write(priv, hw_videoport, DSS_VP_TIMING_H,
+ FLD_VAL(hsw - 1, 7, 0) |
+ FLD_VAL(hfp - 1, 19, 8) | FLD_VAL(hbp - 1, 31, 20));
+
+ dss_vp_write(priv, hw_videoport, DSS_VP_TIMING_V,
+ FLD_VAL(vsw - 1, 7, 0) |
+ FLD_VAL(vfp, 19, 8) | FLD_VAL(vbp, 31, 20));
+
+ ivs = !!(timing->flags & (1 << 3));
+
+ ihs = !!(timing->flags & (1 << 1));
+
+ ieo = 0;
+
+ ipc = 0;
+
+ /* always use the 'rf' setting */
+ onoff = true;
+
+ rf = true;
+
+ /* always use aligned syncs */
+ align = true;
+
+ /* always use DE_HIGH for OLDI */
+ if (priv->feat->vp_bus_type[hw_videoport] == DSS_VP_OLDI)
+ ieo = false;
+
+ dss_vp_write(priv, hw_videoport, DSS_VP_POL_FREQ,
+ FLD_VAL(align, 18, 18) |
+ FLD_VAL(onoff, 17, 17) |
+ FLD_VAL(rf, 16, 16) |
+ FLD_VAL(ieo, 15, 15) |
+ FLD_VAL(ipc, 14, 14) |
+ FLD_VAL(ihs, 13, 13) |
+ FLD_VAL(ivs, 12, 12));
+
+ dss_vp_write(priv, hw_videoport, DSS_VP_SIZE_SCREEN,
+ FLD_VAL(timing->hactive.typ - 1, 11, 0) |
+ FLD_VAL(timing->vactive.typ - 1, 27, 16));
+
+ VP_REG_FLD_MOD(priv, hw_videoport, DSS_VP_CONTROL, 1, 0, 0);
+}
+
+enum c8_to_c12_mode { C8_TO_C12_REPLICATE, C8_TO_C12_MAX, C8_TO_C12_MIN };
+
+static u16 c8_to_c12(u8 c8, enum c8_to_c12_mode mode)
+{
+ u16 c12;
+
+ c12 = c8 << 4;
+
+ switch (mode) {
+ case C8_TO_C12_REPLICATE:
+ /* Copy c8 4 MSB to 4 LSB for full scale c12 */
+ c12 |= c8 >> 4;
+ break;
+ case C8_TO_C12_MAX:
+ c12 |= 0xF;
+ break;
+ default:
+ case C8_TO_C12_MIN:
+ break;
+ }
+
+ return c12;
+}
+
+static u64 argb8888_to_argb12121212(u32 argb8888, enum c8_to_c12_mode m)
+{
+ u8 a, r, g, b;
+ u64 v;
+
+ a = (argb8888 >> 24) & 0xff;
+ r = (argb8888 >> 16) & 0xff;
+ g = (argb8888 >> 8) & 0xff;
+ b = (argb8888 >> 0) & 0xff;
+
+ v = ((u64)c8_to_c12(a, m) << 36) | ((u64)c8_to_c12(r, m) << 24) |
+ ((u64)c8_to_c12(g, m) << 12) | (u64)c8_to_c12(b, m);
+
+ return v;
+}
+
+static void dss_vp_set_default_color(struct tidss_drv_priv *priv,
+ u32 hw_videoport, u32 default_color)
+{
+ u64 v;
+
+ v = argb8888_to_argb12121212(default_color, C8_TO_C12_REPLICATE);
+ dss_ovr_write(priv, hw_videoport,
+ DSS_OVR_DEFAULT_COLOR, v & 0xffffffff);
+ dss_ovr_write(priv, hw_videoport,
+ DSS_OVR_DEFAULT_COLOR2, (v >> 32) & 0xffff);
+}
+
+int dss_vp_enable_clk(struct tidss_drv_priv *priv, u32 hw_videoport)
+{
+ int ret = clk_prepare_enable(&priv->vp_clk[hw_videoport]);
+
+ if (ret)
+ dev_dbg(priv->dev, "%s: enabling clk failed: %d\n", __func__,
+ ret);
+
+ return ret;
+}
+
+void dss_vp_prepare(struct tidss_drv_priv *priv, u32 hw_videoport)
+{
+ dss_vp_set_gamma(priv, hw_videoport, NULL, 0);
+ dss_vp_set_default_color(priv, 0, 0);
+
+ if (priv->feat->vp_bus_type[hw_videoport] == DSS_VP_OLDI) {
+ dss_oldi_tx_power(priv, true);
+ dss_enable_oldi(priv, hw_videoport);
+ }
+}
+
+static
+unsigned int dss_pclk_diff(unsigned long rate, unsigned long real_rate)
+{
+ int r = rate / 100, rr = real_rate / 100;
+
+ return (unsigned int)(abs(((rr - r) * 100) / r));
+}
+
+int dss_vp_set_clk_rate(struct tidss_drv_priv *priv, u32 hw_videoport,
+ unsigned long rate)
+{
+ int r;
+ unsigned long new_rate;
+
+ /*
+ * For AM625 OLDI video ports, the requested pixel clock needs to take into account the
+ * serial clock required for the serialization of DPI signals into LVDS signals. The
+ * incoming pixel clock on the OLDI video port gets divided by 7 whenever OLDI enable bit
+ * gets set.
+ */
+ if (priv->feat->vp_bus_type[hw_videoport] == DSS_VP_OLDI &&
+ priv->feat->subrev == DSS_AM625)
+ rate *= 7;
+
+ r = clk_set_rate(&priv->vp_clk[hw_videoport], rate);
+
+ new_rate = clk_get_rate(&priv->vp_clk[hw_videoport]);
+
+ if (dss_pclk_diff(rate, new_rate) > 5)
+ dev_warn(priv->dev,
+ "vp%d: Clock rate %lu differs over 5%% from requested %lu\n",
+ hw_videoport, new_rate, rate);
+
+ dev_dbg(priv->dev, "vp%d: new rate %lu Hz (requested %lu Hz)\n",
+ hw_videoport, clk_get_rate(&priv->vp_clk[hw_videoport]), rate);
+ return 0;
+}
+
+static void dss_ovr_set_plane(struct tidss_drv_priv *priv,
+ u32 hw_plane, u32 hw_ovr,
+ u32 x, u32 y, u32 layer)
+{
+ OVR_REG_FLD_MOD(priv, hw_ovr, DSS_OVR_ATTRIBUTES(layer),
+ 0x1, 4, 1);
+ OVR_REG_FLD_MOD(priv, hw_ovr, DSS_OVR_ATTRIBUTES(layer),
+ x, 17, 6);
+ OVR_REG_FLD_MOD(priv, hw_ovr, DSS_OVR_ATTRIBUTES(layer),
+ y, 30, 19);
+}
+
+void dss_ovr_enable_layer(struct tidss_drv_priv *priv,
+ u32 hw_ovr, u32 layer, bool enable)
+{
+ OVR_REG_FLD_MOD(priv, hw_ovr, DSS_OVR_ATTRIBUTES(layer),
+ !!enable, 0, 0);
+}
+
+static void dss_vid_csc_enable(struct tidss_drv_priv *priv, u32 hw_plane,
+ bool enable)
+{
+ VID_REG_FLD_MOD(priv, hw_plane, DSS_VID_ATTRIBUTES, !!enable, 9, 9);
+}
+
+int dss_plane_setup(struct tidss_drv_priv *priv, u32 hw_plane, u32 hw_videoport)
+{
+ VID_REG_FLD_MOD(priv, hw_plane, DSS_VID_ATTRIBUTES,
+ priv->pixel_format, 6, 1);
+
+ dss_vid_write(priv, hw_plane, DSS_VID_PICTURE_SIZE,
+ ((LCD_MAX_WIDTH - 1) | ((LCD_MAX_HEIGHT - 1) << 16)));
+
+ dss_vid_csc_enable(priv, hw_plane, false);
+
+ dss_vid_write(priv, hw_plane, DSS_VID_GLOBAL_ALPHA, 0xFF);
+
+ VID_REG_FLD_MOD(priv, hw_plane, DSS_VID_ATTRIBUTES, 1, 28, 28);
+ return 0;
+}
+
+int dss_plane_enable(struct tidss_drv_priv *priv, u32 hw_plane, bool enable)
+{
+ VID_REG_FLD_MOD(priv, hw_plane, DSS_VID_ATTRIBUTES, !!enable, 0, 0);
+
+ return 0;
+}
+
+static u32 dss_vid_get_fifo_size(struct tidss_drv_priv *priv, u32 hw_plane)
+{
+ return VID_REG_GET(priv, hw_plane, DSS_VID_BUF_SIZE_STATUS, 15, 0);
+}
+
+static void dss_vid_set_mflag_threshold(struct tidss_drv_priv *priv,
+ u32 hw_plane, u32 low, u32 high)
+{
+ dss_vid_write(priv, hw_plane, DSS_VID_MFLAG_THRESHOLD,
+ FLD_VAL(high, 31, 16) | FLD_VAL(low, 15, 0));
+}
+
+static
+void dss_vid_set_buf_threshold(struct tidss_drv_priv *priv,
+ u32 hw_plane, u32 low, u32 high)
+{
+ dss_vid_write(priv, hw_plane, DSS_VID_BUF_THRESHOLD,
+ FLD_VAL(high, 31, 16) | FLD_VAL(low, 15, 0));
+}
+
+static void dss_plane_init(struct tidss_drv_priv *priv)
+{
+ unsigned int hw_plane;
+ u32 cba_lo_pri = 1;
+ u32 cba_hi_pri = 0;
+
+ REG_FLD_MOD(priv, DSS_CBA_CFG, cba_lo_pri, 2, 0);
+ REG_FLD_MOD(priv, DSS_CBA_CFG, cba_hi_pri, 5, 3);
+
+ /* MFLAG_CTRL = ENABLED */
+ REG_FLD_MOD(priv, DSS_GLOBAL_MFLAG_ATTRIBUTE, 2, 1, 0);
+ /* MFLAG_START = MFLAGNORMALSTARTMODE */
+ REG_FLD_MOD(priv, DSS_GLOBAL_MFLAG_ATTRIBUTE, 0, 6, 6);
+
+ for (hw_plane = 0; hw_plane < priv->feat->num_planes; hw_plane++) {
+ u32 size = dss_vid_get_fifo_size(priv, hw_plane);
+ u32 thr_low, thr_high;
+ u32 mflag_low, mflag_high;
+ u32 preload;
+
+ thr_high = size - 1;
+ thr_low = size / 2;
+
+ mflag_high = size * 2 / 3;
+ mflag_low = size / 3;
+
+ preload = thr_low;
+
+ dev_dbg(priv->dev,
+ "%s: bufsize %u, buf_threshold %u/%u, mflag threshold %u/%u preload %u\n",
+ priv->feat->vid_name[hw_plane],
+ size,
+ thr_high, thr_low,
+ mflag_high, mflag_low,
+ preload);
+
+ dss_vid_set_buf_threshold(priv, hw_plane,
+ thr_low, thr_high);
+ dss_vid_set_mflag_threshold(priv, hw_plane,
+ mflag_low, mflag_high);
+
+ dss_vid_write(priv, hw_plane, DSS_VID_PRELOAD, preload);
+
+ /* Prefech up to PRELOAD value */
+ VID_REG_FLD_MOD(priv, hw_plane, DSS_VID_ATTRIBUTES, 0,
+ 19, 19);
+ }
+}
+
+static void dss_vp_init(struct tidss_drv_priv *priv)
+{
+ unsigned int i;
+
+ /* Enable the gamma Shadow bit-field for all VPs*/
+ for (i = 0; i < priv->feat->num_vps; i++)
+ VP_REG_FLD_MOD(priv, i, DSS_VP_CONFIG, 1, 2, 2);
+}
+
+static int dss_init_am65x_oldi_io_ctrl(struct udevice *dev,
+ struct tidss_drv_priv *priv)
+{
+ struct udevice *syscon;
+ struct regmap *regmap;
+ int ret = 0;
+
+ ret = uclass_get_device_by_phandle(UCLASS_SYSCON, dev, "ti,am65x-oldi-io-ctrl",
+ &syscon);
+ if (ret) {
+ debug("unable to find ti,am65x-oldi-io-ctrl syscon device (%d)\n", ret);
+ return ret;
+ }
+
+ /* get grf-reg base address */
+ regmap = syscon_get_regmap(syscon);
+ if (!regmap) {
+ debug("unable to find rockchip grf regmap\n");
+ return -ENODEV;
+ }
+ priv->oldi_io_ctrl = regmap;
+ return 0;
+}
+
+static int tidss_drv_probe(struct udevice *dev)
+{
+ struct video_uc_plat *uc_plat = dev_get_uclass_plat(dev);
+ struct video_priv *uc_priv = dev_get_uclass_priv(dev);
+ struct tidss_drv_priv *priv = dev_get_priv(dev);
+ struct udevice *panel = NULL;
+ struct display_timing timings;
+ unsigned int i;
+ int ret = 0;
+ const char *mode;
+
+ priv->dev = dev;
+
+ priv->feat = &dss_am625_feats;
+
+ /*
+ * set your plane format based on your bmp image
+ * Supported 24bpp and 32bpp bmpimages
+ */
+
+ priv->pixel_format = DSS_FORMAT_XRGB8888;
+
+ dss_common_regmap = priv->feat->common_regs;
+
+ ret = uclass_first_device_err(UCLASS_PANEL, &panel);
+ if (ret) {
+ if (ret != -ENODEV)
+ dev_err(dev, "panel device error %d\n", ret);
+ return ret;
+ }
+
+ ret = panel_get_display_timing(panel, &timings);
+ if (ret) {
+ ret = ofnode_decode_panel_timing(dev_ofnode(panel),
+ &timings);
+ if (ret) {
+ dev_err(dev, "decode display timing error %d\n", ret);
+ return ret;
+ }
+ }
+
+ mode = ofnode_read_string(dev_ofnode(panel), "data-mapping");
+ if (!mode) {
+ debug("%s: Could not read mode property\n", dev->name);
+ return -EINVAL;
+ }
+
+ uc_priv->bpix = VIDEO_BPP32;
+
+ if (!strcmp(mode, "vesa-24"))
+ priv->bus_format = &dss_bus_formats[7];
+ else
+ priv->bus_format = &dss_bus_formats[8];
+
+ /* Common address */
+ priv->base_common = dev_remap_addr_index(dev, 0);
+ if (!priv->base_common)
+ return -EINVAL;
+
+ /* plane address setup and enable */
+ for (i = 0; i < priv->feat->num_planes; i++) {
+ priv->base_vid[i] = dev_remap_addr_index(dev, i + 2);
+ if (!priv->base_vid[i])
+ return -EINVAL;
+ }
+
+ dss_vid_write(priv, 0, DSS_VID_BA_0, uc_plat->base & 0xffffffff);
+ dss_vid_write(priv, 0, DSS_VID_BA_EXT_0, (u64)uc_plat->base >> 32);
+ dss_vid_write(priv, 0, DSS_VID_BA_1, uc_plat->base & 0xffffffff);
+ dss_vid_write(priv, 0, DSS_VID_BA_EXT_1, (u64)uc_plat->base >> 32);
+
+ ret = dss_plane_setup(priv, 0, 0);
+ if (ret) {
+ dss_plane_enable(priv, 0, false);
+ return ret;
+ }
+
+ dss_plane_enable(priv, 0, true);
+ dss_plane_init(priv);
+
+ /* video port address clocks and enable */
+ for (i = 0; i < priv->feat->num_vps; i++) {
+ priv->base_ovr[i] = dev_remap_addr_index(dev, i + 4);
+ priv->base_vp[i] = dev_remap_addr_index(dev, i + 6);
+ }
+
+ ret = clk_get_by_name(dev, "vp1", &priv->vp_clk[0]);
+ if (ret) {
+ dev_err(dev, "video port %d clock enable error %d\n", i, ret);
+ return ret;
+ }
+
+ dss_ovr_set_plane(priv, 1, 0, 0, 0, 0);
+ dss_ovr_enable_layer(priv, 0, 0, true);
+
+ /* Video Port cloks */
+ dss_vp_enable_clk(priv, 0);
+
+ dss_vp_set_clk_rate(priv, 0, timings.pixelclock.typ * 1000);
+
+ priv->oldi_mode = OLDI_MODE_OFF;
+ uc_priv->xsize = timings.hactive.typ;
+ uc_priv->ysize = timings.vactive.typ;
+ if (priv->feat->subrev == DSS_AM65X || priv->feat->subrev == DSS_AM625) {
+ priv->oldi_mode = OLDI_DUAL_LINK;
+ if (priv->oldi_mode) {
+ ret = dss_init_am65x_oldi_io_ctrl(dev, priv);
+ if (ret)
+ return ret;
+ }
+ }
+
+ dss_vp_prepare(priv, 0);
+ dss_vp_enable(priv, 0, &timings);
+ dss_vp_init(priv);
+
+ ret = clk_get_by_name(dev, "fck", &priv->fclk);
+ if (ret) {
+ dev_err(dev, "peripheral clock get error %d\n", ret);
+ return ret;
+ }
+
+ ret = clk_enable(&priv->fclk);
+ if (ret) {
+ dev_err(dev, "peripheral clock enable error %d\n", ret);
+ return ret;
+ }
+
+ if (IS_ERR(&priv->fclk)) {
+ dev_err(dev, "%s: Failed to get fclk: %ld\n",
+ __func__, PTR_ERR(&priv->fclk));
+ return PTR_ERR(&priv->fclk);
+ }
+
+ dev_dbg(dev, "DSS fclk %lu Hz\n", clk_get_rate(&priv->fclk));
+
+ video_set_flush_dcache(dev, true);
+ return 0;
+}
+
+static int tidss_drv_remove(struct udevice *dev)
+{
+ u32 val;
+ int ret;
+ struct tidss_drv_priv *priv = dev_get_priv(dev);
+
+ priv->base_common = dev_remap_addr_index(dev, 0);
+ REG_FLD_MOD(priv, DSS_SYSCONFIG, 1, 1, 1);
+ /* Wait for reset to complete */
+ ret = readl_poll_timeout(priv->base_common + DSS_SYSSTATUS,
+ val, val & 1, 5000);
+ if (ret) {
+ dev_warn(priv->dev, "failed to reset priv\n");
+ return ret;
+ }
+ return 0;
+}
+
+static int tidss_drv_bind(struct udevice *dev)
+{
+ struct video_uc_plat *uc_plat = dev_get_uclass_plat(dev);
+
+ uc_plat->size = ((LCD_MAX_WIDTH * LCD_MAX_HEIGHT *
+ (1 << LCD_MAX_LOG2_BPP)) >> 3) + 0x20;
+ return 0;
+}
+
+static const struct udevice_id tidss_drv_ids[] = {
+ { .compatible = "ti,am625-dss" },
+ { }
+};
+
+U_BOOT_DRIVER(tidss_drv) = {
+ .name = "tidss_drv",
+ .id = UCLASS_VIDEO,
+ .of_match = tidss_drv_ids,
+ .bind = tidss_drv_bind,
+ .probe = tidss_drv_probe,
+ .remove = tidss_drv_remove,
+ .priv_auto = sizeof(struct tidss_drv_priv),
+ .flags = DM_FLAG_OS_PREPARE,
+};
generated by cgit v1.2.3 (git 2.39.0) at 2024-09-13 19:45:50 +0300