From 6778948f9de86c3cfaf36725a7c87dcff9ba247f Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 08:20:59 +0000
Subject: [PATCH] kernel_5.10 no rt
---
kernel/drivers/gpu/drm/omapdrm/dss/dpi.c | 561 +++++++++++++++++++++++++------------------------------
1 files changed, 253 insertions(+), 308 deletions(-)
diff --git a/kernel/drivers/gpu/drm/omapdrm/dss/dpi.c b/kernel/drivers/gpu/drm/omapdrm/dss/dpi.c
index 9fcc502..1d2992d 100644
--- a/kernel/drivers/gpu/drm/omapdrm/dss/dpi.c
+++ b/kernel/drivers/gpu/drm/omapdrm/dss/dpi.c
@@ -1,62 +1,54 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2009 Nokia Corporation
* Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
*
* Some code and ideas taken from drivers/video/omap/ driver
* by Imre Deak.
- *
- * 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/>.
*/
#define DSS_SUBSYS_NAME "DPI"
-#include <linux/kernel.h>
+#include <linux/clk.h>
#include <linux/delay.h>
-#include <linux/export.h>
#include <linux/err.h>
#include <linux/errno.h>
+#include <linux/export.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regulator/consumer.h>
#include <linux/string.h>
-#include <linux/of.h>
-#include <linux/clk.h>
#include <linux/sys_soc.h>
-#include "omapdss.h"
+#include <drm/drm_bridge.h>
+
#include "dss.h"
+#include "omapdss.h"
struct dpi_data {
struct platform_device *pdev;
enum dss_model dss_model;
struct dss_device *dss;
+ unsigned int id;
struct regulator *vdds_dsi_reg;
enum dss_clk_source clk_src;
struct dss_pll *pll;
- struct mutex lock;
-
- struct videomode vm;
struct dss_lcd_mgr_config mgr_config;
+ unsigned long pixelclock;
int data_lines;
struct omap_dss_device output;
+ struct drm_bridge bridge;
};
-static struct dpi_data *dpi_get_data_from_dssdev(struct omap_dss_device *dssdev)
-{
- return container_of(dssdev, struct dpi_data, output);
-}
+#define drm_bridge_to_dpi(bridge) container_of(bridge, struct dpi_data, bridge)
+
+/* -----------------------------------------------------------------------------
+ * Clock Handling and PLL
+ */
static enum dss_clk_source dpi_get_clk_src_dra7xx(struct dpi_data *dpi,
enum omap_channel channel)
@@ -293,9 +285,7 @@
-static int dpi_set_pll_clk(struct dpi_data *dpi, enum omap_channel channel,
- unsigned long pck_req, unsigned long *fck, int *lck_div,
- int *pck_div)
+static int dpi_set_pll_clk(struct dpi_data *dpi, unsigned long pck_req)
{
struct dpi_clk_calc_ctx ctx;
int r;
@@ -309,19 +299,15 @@
if (r)
return r;
- dss_select_lcd_clk_source(dpi->dss, channel, dpi->clk_src);
+ dss_select_lcd_clk_source(dpi->dss, dpi->output.dispc_channel,
+ dpi->clk_src);
dpi->mgr_config.clock_info = ctx.dispc_cinfo;
-
- *fck = ctx.pll_cinfo.clkout[ctx.clkout_idx];
- *lck_div = ctx.dispc_cinfo.lck_div;
- *pck_div = ctx.dispc_cinfo.pck_div;
return 0;
}
-static int dpi_set_dispc_clk(struct dpi_data *dpi, unsigned long pck_req,
- unsigned long *fck, int *lck_div, int *pck_div)
+static int dpi_set_dispc_clk(struct dpi_data *dpi, unsigned long pck_req)
{
struct dpi_clk_calc_ctx ctx;
int r;
@@ -337,42 +323,19 @@
dpi->mgr_config.clock_info = ctx.dispc_cinfo;
- *fck = ctx.fck;
- *lck_div = ctx.dispc_cinfo.lck_div;
- *pck_div = ctx.dispc_cinfo.pck_div;
-
return 0;
}
static int dpi_set_mode(struct dpi_data *dpi)
{
- struct videomode *vm = &dpi->vm;
- int lck_div = 0, pck_div = 0;
- unsigned long fck = 0;
- unsigned long pck;
- int r = 0;
+ int r;
if (dpi->pll)
- r = dpi_set_pll_clk(dpi, dpi->output.dispc_channel,
- vm->pixelclock, &fck, &lck_div, &pck_div);
+ r = dpi_set_pll_clk(dpi, dpi->pixelclock);
else
- r = dpi_set_dispc_clk(dpi, vm->pixelclock, &fck,
- &lck_div, &pck_div);
- if (r)
- return r;
+ r = dpi_set_dispc_clk(dpi, dpi->pixelclock);
- pck = fck / lck_div / pck_div;
-
- if (pck != vm->pixelclock) {
- DSSWARN("Could not find exact pixel clock. Requested %lu Hz, got %lu Hz\n",
- vm->pixelclock, pck);
-
- vm->pixelclock = pck;
- }
-
- dss_mgr_set_timings(&dpi->output, vm);
-
- return 0;
+ return r;
}
static void dpi_config_lcd_manager(struct dpi_data *dpi)
@@ -389,149 +352,19 @@
dss_mgr_set_lcd_config(&dpi->output, &dpi->mgr_config);
}
-static int dpi_display_enable(struct omap_dss_device *dssdev)
+static int dpi_clock_update(struct dpi_data *dpi, unsigned long *clock)
{
- struct dpi_data *dpi = dpi_get_data_from_dssdev(dssdev);
- struct omap_dss_device *out = &dpi->output;
- int r;
-
- mutex_lock(&dpi->lock);
-
- if (!out->dispc_channel_connected) {
- DSSERR("failed to enable display: no output/manager\n");
- r = -ENODEV;
- goto err_no_out_mgr;
- }
-
- if (dpi->vdds_dsi_reg) {
- r = regulator_enable(dpi->vdds_dsi_reg);
- if (r)
- goto err_reg_enable;
- }
-
- r = dispc_runtime_get(dpi->dss->dispc);
- if (r)
- goto err_get_dispc;
-
- r = dss_dpi_select_source(dpi->dss, out->port_num, out->dispc_channel);
- if (r)
- goto err_src_sel;
-
- if (dpi->pll) {
- r = dss_pll_enable(dpi->pll);
- if (r)
- goto err_pll_init;
- }
-
- r = dpi_set_mode(dpi);
- if (r)
- goto err_set_mode;
-
- dpi_config_lcd_manager(dpi);
-
- mdelay(2);
-
- r = dss_mgr_enable(&dpi->output);
- if (r)
- goto err_mgr_enable;
-
- mutex_unlock(&dpi->lock);
-
- return 0;
-
-err_mgr_enable:
-err_set_mode:
- if (dpi->pll)
- dss_pll_disable(dpi->pll);
-err_pll_init:
-err_src_sel:
- dispc_runtime_put(dpi->dss->dispc);
-err_get_dispc:
- if (dpi->vdds_dsi_reg)
- regulator_disable(dpi->vdds_dsi_reg);
-err_reg_enable:
-err_no_out_mgr:
- mutex_unlock(&dpi->lock);
- return r;
-}
-
-static void dpi_display_disable(struct omap_dss_device *dssdev)
-{
- struct dpi_data *dpi = dpi_get_data_from_dssdev(dssdev);
-
- mutex_lock(&dpi->lock);
-
- dss_mgr_disable(&dpi->output);
-
- if (dpi->pll) {
- dss_select_lcd_clk_source(dpi->dss, dpi->output.dispc_channel,
- DSS_CLK_SRC_FCK);
- dss_pll_disable(dpi->pll);
- }
-
- dispc_runtime_put(dpi->dss->dispc);
-
- if (dpi->vdds_dsi_reg)
- regulator_disable(dpi->vdds_dsi_reg);
-
- mutex_unlock(&dpi->lock);
-}
-
-static void dpi_set_timings(struct omap_dss_device *dssdev,
- struct videomode *vm)
-{
- struct dpi_data *dpi = dpi_get_data_from_dssdev(dssdev);
-
- DSSDBG("dpi_set_timings\n");
-
- mutex_lock(&dpi->lock);
-
- dpi->vm = *vm;
-
- mutex_unlock(&dpi->lock);
-}
-
-static void dpi_get_timings(struct omap_dss_device *dssdev,
- struct videomode *vm)
-{
- struct dpi_data *dpi = dpi_get_data_from_dssdev(dssdev);
-
- mutex_lock(&dpi->lock);
-
- *vm = dpi->vm;
-
- mutex_unlock(&dpi->lock);
-}
-
-static int dpi_check_timings(struct omap_dss_device *dssdev,
- struct videomode *vm)
-{
- struct dpi_data *dpi = dpi_get_data_from_dssdev(dssdev);
- enum omap_channel channel = dpi->output.dispc_channel;
int lck_div, pck_div;
unsigned long fck;
- unsigned long pck;
struct dpi_clk_calc_ctx ctx;
- bool ok;
-
- if (vm->hactive % 8 != 0)
- return -EINVAL;
-
- if (!dispc_mgr_timings_ok(dpi->dss->dispc, channel, vm))
- return -EINVAL;
-
- if (vm->pixelclock == 0)
- return -EINVAL;
if (dpi->pll) {
- ok = dpi_pll_clk_calc(dpi, vm->pixelclock, &ctx);
- if (!ok)
+ if (!dpi_pll_clk_calc(dpi, *clock, &ctx))
return -EINVAL;
fck = ctx.pll_cinfo.clkout[ctx.clkout_idx];
} else {
- ok = dpi_dss_clk_calc(dpi, vm->pixelclock, &ctx);
- if (!ok)
+ if (!dpi_dss_clk_calc(dpi, *clock, &ctx))
return -EINVAL;
fck = ctx.fck;
@@ -540,9 +373,7 @@
lck_div = ctx.dispc_cinfo.lck_div;
pck_div = ctx.dispc_cinfo.pck_div;
- pck = fck / lck_div / pck_div;
-
- vm->pixelclock = pck;
+ *clock = fck / lck_div / pck_div;
return 0;
}
@@ -558,38 +389,6 @@
return r;
dss_pll_disable(pll);
-
- return 0;
-}
-
-static const struct soc_device_attribute dpi_soc_devices[] = {
- { .machine = "OMAP3[456]*" },
- { .machine = "[AD]M37*" },
- { /* sentinel */ }
-};
-
-static int dpi_init_regulator(struct dpi_data *dpi)
-{
- struct regulator *vdds_dsi;
-
- /*
- * The DPI uses the DSI VDDS on OMAP34xx, OMAP35xx, OMAP36xx, AM37xx and
- * DM37xx only.
- */
- if (!soc_device_match(dpi_soc_devices))
- return 0;
-
- if (dpi->vdds_dsi_reg)
- return 0;
-
- vdds_dsi = devm_regulator_get(&dpi->pdev->dev, "vdds_dsi");
- if (IS_ERR(vdds_dsi)) {
- if (PTR_ERR(vdds_dsi) != -EPROBE_DEFER)
- DSSERR("can't get VDDS_DSI regulator\n");
- return PTR_ERR(vdds_dsi);
- }
-
- dpi->vdds_dsi_reg = vdds_dsi;
return 0;
}
@@ -615,13 +414,175 @@
dpi->pll = pll;
}
+/* -----------------------------------------------------------------------------
+ * DRM Bridge Operations
+ */
+
+static int dpi_bridge_attach(struct drm_bridge *bridge,
+ enum drm_bridge_attach_flags flags)
+{
+ struct dpi_data *dpi = drm_bridge_to_dpi(bridge);
+
+ if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR))
+ return -EINVAL;
+
+ dpi_init_pll(dpi);
+
+ return drm_bridge_attach(bridge->encoder, dpi->output.next_bridge,
+ bridge, flags);
+}
+
+static enum drm_mode_status
+dpi_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_info *info,
+ const struct drm_display_mode *mode)
+{
+ struct dpi_data *dpi = drm_bridge_to_dpi(bridge);
+ unsigned long clock = mode->clock * 1000;
+ int ret;
+
+ if (mode->hdisplay % 8 != 0)
+ return MODE_BAD_WIDTH;
+
+ if (mode->clock == 0)
+ return MODE_NOCLOCK;
+
+ ret = dpi_clock_update(dpi, &clock);
+ if (ret < 0)
+ return MODE_CLOCK_RANGE;
+
+ return MODE_OK;
+}
+
+static bool dpi_bridge_mode_fixup(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ struct dpi_data *dpi = drm_bridge_to_dpi(bridge);
+ unsigned long clock = mode->clock * 1000;
+ int ret;
+
+ ret = dpi_clock_update(dpi, &clock);
+ if (ret < 0)
+ return false;
+
+ adjusted_mode->clock = clock / 1000;
+
+ return true;
+}
+
+static void dpi_bridge_mode_set(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode,
+ const struct drm_display_mode *adjusted_mode)
+{
+ struct dpi_data *dpi = drm_bridge_to_dpi(bridge);
+
+ dpi->pixelclock = adjusted_mode->clock * 1000;
+}
+
+static void dpi_bridge_enable(struct drm_bridge *bridge)
+{
+ struct dpi_data *dpi = drm_bridge_to_dpi(bridge);
+ int r;
+
+ if (dpi->vdds_dsi_reg) {
+ r = regulator_enable(dpi->vdds_dsi_reg);
+ if (r)
+ return;
+ }
+
+ r = dispc_runtime_get(dpi->dss->dispc);
+ if (r)
+ goto err_get_dispc;
+
+ r = dss_dpi_select_source(dpi->dss, dpi->id, dpi->output.dispc_channel);
+ if (r)
+ goto err_src_sel;
+
+ if (dpi->pll) {
+ r = dss_pll_enable(dpi->pll);
+ if (r)
+ goto err_pll_init;
+ }
+
+ r = dpi_set_mode(dpi);
+ if (r)
+ goto err_set_mode;
+
+ dpi_config_lcd_manager(dpi);
+
+ mdelay(2);
+
+ r = dss_mgr_enable(&dpi->output);
+ if (r)
+ goto err_mgr_enable;
+
+ return;
+
+err_mgr_enable:
+err_set_mode:
+ if (dpi->pll)
+ dss_pll_disable(dpi->pll);
+err_pll_init:
+err_src_sel:
+ dispc_runtime_put(dpi->dss->dispc);
+err_get_dispc:
+ if (dpi->vdds_dsi_reg)
+ regulator_disable(dpi->vdds_dsi_reg);
+}
+
+static void dpi_bridge_disable(struct drm_bridge *bridge)
+{
+ struct dpi_data *dpi = drm_bridge_to_dpi(bridge);
+
+ dss_mgr_disable(&dpi->output);
+
+ if (dpi->pll) {
+ dss_select_lcd_clk_source(dpi->dss, dpi->output.dispc_channel,
+ DSS_CLK_SRC_FCK);
+ dss_pll_disable(dpi->pll);
+ }
+
+ dispc_runtime_put(dpi->dss->dispc);
+
+ if (dpi->vdds_dsi_reg)
+ regulator_disable(dpi->vdds_dsi_reg);
+}
+
+static const struct drm_bridge_funcs dpi_bridge_funcs = {
+ .attach = dpi_bridge_attach,
+ .mode_valid = dpi_bridge_mode_valid,
+ .mode_fixup = dpi_bridge_mode_fixup,
+ .mode_set = dpi_bridge_mode_set,
+ .enable = dpi_bridge_enable,
+ .disable = dpi_bridge_disable,
+};
+
+static void dpi_bridge_init(struct dpi_data *dpi)
+{
+ dpi->bridge.funcs = &dpi_bridge_funcs;
+ dpi->bridge.of_node = dpi->pdev->dev.of_node;
+ dpi->bridge.type = DRM_MODE_CONNECTOR_DPI;
+
+ drm_bridge_add(&dpi->bridge);
+}
+
+static void dpi_bridge_cleanup(struct dpi_data *dpi)
+{
+ drm_bridge_remove(&dpi->bridge);
+}
+
+/* -----------------------------------------------------------------------------
+ * Initialisation and Cleanup
+ */
+
/*
* Return a hardcoded channel for the DPI output. This should work for
* current use cases, but this can be later expanded to either resolve
* the channel in some more dynamic manner, or get the channel as a user
* parameter.
*/
-static enum omap_channel dpi_get_channel(struct dpi_data *dpi, int port_num)
+static enum omap_channel dpi_get_channel(struct dpi_data *dpi)
{
switch (dpi->dss_model) {
case DSS_MODEL_OMAP2:
@@ -629,7 +590,7 @@
return OMAP_DSS_CHANNEL_LCD;
case DSS_MODEL_DRA7:
- switch (port_num) {
+ switch (dpi->id) {
case 2:
return OMAP_DSS_CHANNEL_LCD3;
case 1:
@@ -651,69 +612,16 @@
}
}
-static int dpi_connect(struct omap_dss_device *dssdev,
- struct omap_dss_device *dst)
-{
- struct dpi_data *dpi = dpi_get_data_from_dssdev(dssdev);
- int r;
-
- r = dpi_init_regulator(dpi);
- if (r)
- return r;
-
- dpi_init_pll(dpi);
-
- r = dss_mgr_connect(&dpi->output, dssdev);
- if (r)
- return r;
-
- r = omapdss_output_set_device(dssdev, dst);
- if (r) {
- DSSERR("failed to connect output to new device: %s\n",
- dst->name);
- dss_mgr_disconnect(&dpi->output, dssdev);
- return r;
- }
-
- return 0;
-}
-
-static void dpi_disconnect(struct omap_dss_device *dssdev,
- struct omap_dss_device *dst)
-{
- struct dpi_data *dpi = dpi_get_data_from_dssdev(dssdev);
-
- WARN_ON(dst != dssdev->dst);
-
- if (dst != dssdev->dst)
- return;
-
- omapdss_output_unset_device(dssdev);
-
- dss_mgr_disconnect(&dpi->output, dssdev);
-}
-
-static const struct omapdss_dpi_ops dpi_ops = {
- .connect = dpi_connect,
- .disconnect = dpi_disconnect,
-
- .enable = dpi_display_enable,
- .disable = dpi_display_disable,
-
- .check_timings = dpi_check_timings,
- .set_timings = dpi_set_timings,
- .get_timings = dpi_get_timings,
-};
-
-static void dpi_init_output_port(struct dpi_data *dpi, struct device_node *port)
+static int dpi_init_output_port(struct dpi_data *dpi, struct device_node *port)
{
struct omap_dss_device *out = &dpi->output;
+ u32 port_num = 0;
int r;
- u32 port_num;
- r = of_property_read_u32(port, "reg", &port_num);
- if (r)
- port_num = 0;
+ dpi_bridge_init(dpi);
+
+ of_property_read_u32(port, "reg", &port_num);
+ dpi->id = port_num <= 2 ? port_num : 0;
switch (port_num) {
case 2:
@@ -730,13 +638,20 @@
out->dev = &dpi->pdev->dev;
out->id = OMAP_DSS_OUTPUT_DPI;
- out->output_type = OMAP_DISPLAY_TYPE_DPI;
- out->dispc_channel = dpi_get_channel(dpi, port_num);
- out->port_num = port_num;
- out->ops.dpi = &dpi_ops;
+ out->type = OMAP_DISPLAY_TYPE_DPI;
+ out->dispc_channel = dpi_get_channel(dpi);
+ out->of_port = port_num;
out->owner = THIS_MODULE;
- omapdss_register_output(out);
+ r = omapdss_device_init_output(out, &dpi->bridge);
+ if (r < 0) {
+ dpi_bridge_cleanup(dpi);
+ return r;
+ }
+
+ omapdss_device_register(out);
+
+ return 0;
}
static void dpi_uninit_output_port(struct device_node *port)
@@ -744,7 +659,43 @@
struct dpi_data *dpi = port->data;
struct omap_dss_device *out = &dpi->output;
- omapdss_unregister_output(out);
+ omapdss_device_unregister(out);
+ omapdss_device_cleanup_output(out);
+
+ dpi_bridge_cleanup(dpi);
+}
+
+/* -----------------------------------------------------------------------------
+ * Initialisation and Cleanup
+ */
+
+static const struct soc_device_attribute dpi_soc_devices[] = {
+ { .machine = "OMAP3[456]*" },
+ { .machine = "[AD]M37*" },
+ { /* sentinel */ }
+};
+
+static int dpi_init_regulator(struct dpi_data *dpi)
+{
+ struct regulator *vdds_dsi;
+
+ /*
+ * The DPI uses the DSI VDDS on OMAP34xx, OMAP35xx, OMAP36xx, AM37xx and
+ * DM37xx only.
+ */
+ if (!soc_device_match(dpi_soc_devices))
+ return 0;
+
+ vdds_dsi = devm_regulator_get(&dpi->pdev->dev, "vdds_dsi");
+ if (IS_ERR(vdds_dsi)) {
+ if (PTR_ERR(vdds_dsi) != -EPROBE_DEFER)
+ DSSERR("can't get VDDS_DSI regulator\n");
+ return PTR_ERR(vdds_dsi);
+ }
+
+ dpi->vdds_dsi_reg = vdds_dsi;
+
+ return 0;
}
int dpi_init_port(struct dss_device *dss, struct platform_device *pdev,
@@ -764,30 +715,24 @@
return 0;
r = of_property_read_u32(ep, "data-lines", &datalines);
+ of_node_put(ep);
if (r) {
DSSERR("failed to parse datalines\n");
- goto err_datalines;
+ return r;
}
dpi->data_lines = datalines;
-
- of_node_put(ep);
dpi->pdev = pdev;
dpi->dss_model = dss_model;
dpi->dss = dss;
port->data = dpi;
- mutex_init(&dpi->lock);
+ r = dpi_init_regulator(dpi);
+ if (r)
+ return r;
- dpi_init_output_port(dpi, port);
-
- return 0;
-
-err_datalines:
- of_node_put(ep);
-
- return r;
+ return dpi_init_output_port(dpi, port);
}
void dpi_uninit_port(struct device_node *port)
--
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