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9bf7123bb0
Many DSI panel drivers fail to clean up their panel references on mipi_dsi_attach() failure, so we're leaving a dangling drm_panel reference to freed memory. Clean that up on failure. Noticed by inspection, after seeing similar problems on other drivers. Therefore, I'm not marking Fixes/stable. Signed-off-by: Brian Norris <briannorris@chromium.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20210923173336.3.If9e74fa9b1d6eaa9e0e5b95b2b957b992740251c@changeid
290 lines
7.3 KiB
C
290 lines
7.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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// Copyright (C) 2019, Michael Srba
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#include <linux/delay.h>
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#include <linux/gpio/consumer.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/regulator/consumer.h>
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#include <video/mipi_display.h>
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#include <drm/drm_mipi_dsi.h>
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#include <drm/drm_modes.h>
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#include <drm/drm_panel.h>
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struct s6e88a0_ams452ef01 {
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struct drm_panel panel;
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struct mipi_dsi_device *dsi;
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struct regulator_bulk_data supplies[2];
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struct gpio_desc *reset_gpio;
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bool prepared;
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};
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static inline struct
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s6e88a0_ams452ef01 *to_s6e88a0_ams452ef01(struct drm_panel *panel)
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{
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return container_of(panel, struct s6e88a0_ams452ef01, panel);
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}
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#define dsi_dcs_write_seq(dsi, seq...) do { \
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static const u8 d[] = { seq }; \
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int ret; \
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ret = mipi_dsi_dcs_write_buffer(dsi, d, ARRAY_SIZE(d)); \
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if (ret < 0) \
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return ret; \
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} while (0)
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static void s6e88a0_ams452ef01_reset(struct s6e88a0_ams452ef01 *ctx)
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{
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gpiod_set_value_cansleep(ctx->reset_gpio, 1);
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usleep_range(5000, 6000);
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gpiod_set_value_cansleep(ctx->reset_gpio, 0);
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usleep_range(1000, 2000);
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gpiod_set_value_cansleep(ctx->reset_gpio, 1);
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usleep_range(10000, 11000);
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}
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static int s6e88a0_ams452ef01_on(struct s6e88a0_ams452ef01 *ctx)
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{
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struct mipi_dsi_device *dsi = ctx->dsi;
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struct device *dev = &dsi->dev;
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int ret;
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dsi->mode_flags |= MIPI_DSI_MODE_LPM;
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dsi_dcs_write_seq(dsi, 0xf0, 0x5a, 0x5a); // enable LEVEL2 commands
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dsi_dcs_write_seq(dsi, 0xcc, 0x4c); // set Pixel Clock Divider polarity
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ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
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if (ret < 0) {
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dev_err(dev, "Failed to exit sleep mode: %d\n", ret);
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return ret;
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}
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msleep(120);
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// set default brightness/gama
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dsi_dcs_write_seq(dsi, 0xca,
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0x01, 0x00, 0x01, 0x00, 0x01, 0x00, // V255 RR,GG,BB
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0x80, 0x80, 0x80, // V203 R,G,B
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0x80, 0x80, 0x80, // V151 R,G,B
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0x80, 0x80, 0x80, // V87 R,G,B
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0x80, 0x80, 0x80, // V51 R,G,B
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0x80, 0x80, 0x80, // V35 R,G,B
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0x80, 0x80, 0x80, // V23 R,G,B
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0x80, 0x80, 0x80, // V11 R,G,B
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0x6b, 0x68, 0x71, // V3 R,G,B
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0x00, 0x00, 0x00); // V1 R,G,B
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// set default Amoled Off Ratio
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dsi_dcs_write_seq(dsi, 0xb2, 0x40, 0x0a, 0x17, 0x00, 0x0a);
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dsi_dcs_write_seq(dsi, 0xb6, 0x2c, 0x0b); // set default elvss voltage
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dsi_dcs_write_seq(dsi, MIPI_DCS_WRITE_POWER_SAVE, 0x00);
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dsi_dcs_write_seq(dsi, 0xf7, 0x03); // gamma/aor update
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dsi_dcs_write_seq(dsi, 0xf0, 0xa5, 0xa5); // disable LEVEL2 commands
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ret = mipi_dsi_dcs_set_display_on(dsi);
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if (ret < 0) {
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dev_err(dev, "Failed to set display on: %d\n", ret);
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return ret;
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}
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return 0;
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}
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static int s6e88a0_ams452ef01_off(struct s6e88a0_ams452ef01 *ctx)
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{
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struct mipi_dsi_device *dsi = ctx->dsi;
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struct device *dev = &dsi->dev;
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int ret;
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dsi->mode_flags &= ~MIPI_DSI_MODE_LPM;
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ret = mipi_dsi_dcs_set_display_off(dsi);
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if (ret < 0) {
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dev_err(dev, "Failed to set display off: %d\n", ret);
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return ret;
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}
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msleep(35);
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ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
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if (ret < 0) {
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dev_err(dev, "Failed to enter sleep mode: %d\n", ret);
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return ret;
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}
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msleep(120);
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return 0;
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}
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static int s6e88a0_ams452ef01_prepare(struct drm_panel *panel)
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{
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struct s6e88a0_ams452ef01 *ctx = to_s6e88a0_ams452ef01(panel);
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struct device *dev = &ctx->dsi->dev;
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int ret;
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if (ctx->prepared)
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return 0;
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ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
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if (ret < 0) {
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dev_err(dev, "Failed to enable regulators: %d\n", ret);
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return ret;
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}
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s6e88a0_ams452ef01_reset(ctx);
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ret = s6e88a0_ams452ef01_on(ctx);
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if (ret < 0) {
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dev_err(dev, "Failed to initialize panel: %d\n", ret);
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gpiod_set_value_cansleep(ctx->reset_gpio, 0);
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regulator_bulk_disable(ARRAY_SIZE(ctx->supplies),
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ctx->supplies);
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return ret;
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}
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ctx->prepared = true;
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return 0;
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}
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static int s6e88a0_ams452ef01_unprepare(struct drm_panel *panel)
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{
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struct s6e88a0_ams452ef01 *ctx = to_s6e88a0_ams452ef01(panel);
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struct device *dev = &ctx->dsi->dev;
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int ret;
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if (!ctx->prepared)
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return 0;
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ret = s6e88a0_ams452ef01_off(ctx);
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if (ret < 0)
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dev_err(dev, "Failed to un-initialize panel: %d\n", ret);
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gpiod_set_value_cansleep(ctx->reset_gpio, 0);
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regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies);
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ctx->prepared = false;
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return 0;
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}
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static const struct drm_display_mode s6e88a0_ams452ef01_mode = {
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.clock = (540 + 88 + 4 + 20) * (960 + 14 + 2 + 8) * 60 / 1000,
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.hdisplay = 540,
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.hsync_start = 540 + 88,
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.hsync_end = 540 + 88 + 4,
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.htotal = 540 + 88 + 4 + 20,
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.vdisplay = 960,
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.vsync_start = 960 + 14,
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.vsync_end = 960 + 14 + 2,
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.vtotal = 960 + 14 + 2 + 8,
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.width_mm = 56,
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.height_mm = 100,
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};
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static int s6e88a0_ams452ef01_get_modes(struct drm_panel *panel,
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struct drm_connector *connector)
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{
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struct drm_display_mode *mode;
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mode = drm_mode_duplicate(connector->dev, &s6e88a0_ams452ef01_mode);
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if (!mode)
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return -ENOMEM;
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drm_mode_set_name(mode);
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mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
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connector->display_info.width_mm = mode->width_mm;
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connector->display_info.height_mm = mode->height_mm;
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drm_mode_probed_add(connector, mode);
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return 1;
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}
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static const struct drm_panel_funcs s6e88a0_ams452ef01_panel_funcs = {
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.unprepare = s6e88a0_ams452ef01_unprepare,
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.prepare = s6e88a0_ams452ef01_prepare,
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.get_modes = s6e88a0_ams452ef01_get_modes,
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};
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static int s6e88a0_ams452ef01_probe(struct mipi_dsi_device *dsi)
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{
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struct device *dev = &dsi->dev;
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struct s6e88a0_ams452ef01 *ctx;
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int ret;
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ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
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if (!ctx)
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return -ENOMEM;
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ctx->supplies[0].supply = "vdd3";
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ctx->supplies[1].supply = "vci";
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ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies),
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ctx->supplies);
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if (ret < 0) {
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dev_err(dev, "Failed to get regulators: %d\n", ret);
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return ret;
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}
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ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
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if (IS_ERR(ctx->reset_gpio)) {
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ret = PTR_ERR(ctx->reset_gpio);
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dev_err(dev, "Failed to get reset-gpios: %d\n", ret);
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return ret;
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}
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ctx->dsi = dsi;
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mipi_dsi_set_drvdata(dsi, ctx);
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dsi->lanes = 2;
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dsi->format = MIPI_DSI_FMT_RGB888;
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dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST;
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drm_panel_init(&ctx->panel, dev, &s6e88a0_ams452ef01_panel_funcs,
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DRM_MODE_CONNECTOR_DSI);
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drm_panel_add(&ctx->panel);
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ret = mipi_dsi_attach(dsi);
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if (ret < 0) {
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dev_err(dev, "Failed to attach to DSI host: %d\n", ret);
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drm_panel_remove(&ctx->panel);
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return ret;
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}
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return 0;
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}
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static int s6e88a0_ams452ef01_remove(struct mipi_dsi_device *dsi)
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{
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struct s6e88a0_ams452ef01 *ctx = mipi_dsi_get_drvdata(dsi);
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int ret;
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ret = mipi_dsi_detach(dsi);
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if (ret < 0)
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dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
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drm_panel_remove(&ctx->panel);
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return 0;
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}
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static const struct of_device_id s6e88a0_ams452ef01_of_match[] = {
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{ .compatible = "samsung,s6e88a0-ams452ef01" },
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{ /* sentinel */ },
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};
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MODULE_DEVICE_TABLE(of, s6e88a0_ams452ef01_of_match);
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static struct mipi_dsi_driver s6e88a0_ams452ef01_driver = {
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.probe = s6e88a0_ams452ef01_probe,
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.remove = s6e88a0_ams452ef01_remove,
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.driver = {
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.name = "panel-s6e88a0-ams452ef01",
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.of_match_table = s6e88a0_ams452ef01_of_match,
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},
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};
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module_mipi_dsi_driver(s6e88a0_ams452ef01_driver);
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MODULE_AUTHOR("Michael Srba <Michael.Srba@seznam.cz>");
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MODULE_DESCRIPTION("MIPI-DSI based Panel Driver for AMS452EF01 AMOLED LCD with a S6E88A0 controller");
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MODULE_LICENSE("GPL v2");
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