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-rw-r--r--drivers/gpu/drm/stm/Kconfig1
-rw-r--r--drivers/gpu/drm/stm/Makefile1
-rw-r--r--drivers/gpu/drm/stm/drv.c44
-rw-r--r--drivers/gpu/drm/stm/dw_mipi_dsi-stm.c105
-rw-r--r--drivers/gpu/drm/stm/ltdc.c142
5 files changed, 231 insertions, 62 deletions
diff --git a/drivers/gpu/drm/stm/Kconfig b/drivers/gpu/drm/stm/Kconfig
index d15b10de1da6..b7d66915a2be 100644
--- a/drivers/gpu/drm/stm/Kconfig
+++ b/drivers/gpu/drm/stm/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
config DRM_STM
tristate "DRM Support for STMicroelectronics SoC Series"
depends on DRM && (ARCH_STM32 || ARCH_MULTIPLATFORM)
diff --git a/drivers/gpu/drm/stm/Makefile b/drivers/gpu/drm/stm/Makefile
index d883adc365a2..4df5caf01f35 100644
--- a/drivers/gpu/drm/stm/Makefile
+++ b/drivers/gpu/drm/stm/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
stm-drm-y := \
drv.o \
ltdc.o
diff --git a/drivers/gpu/drm/stm/drv.c b/drivers/gpu/drm/stm/drv.c
index 5834ef56fbaa..9dee4e430de5 100644
--- a/drivers/gpu/drm/stm/drv.c
+++ b/drivers/gpu/drm/stm/drv.c
@@ -12,6 +12,7 @@
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/of_platform.h>
+#include <linux/pm_runtime.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
@@ -135,14 +136,14 @@ static __maybe_unused int drv_suspend(struct device *dev)
struct ltdc_device *ldev = ddev->dev_private;
struct drm_atomic_state *state;
- drm_kms_helper_poll_disable(ddev);
+ WARN_ON(ldev->suspend_state);
+
state = drm_atomic_helper_suspend(ddev);
- if (IS_ERR(state)) {
- drm_kms_helper_poll_enable(ddev);
+ if (IS_ERR(state))
return PTR_ERR(state);
- }
+
ldev->suspend_state = state;
- ltdc_suspend(ddev);
+ pm_runtime_force_suspend(dev);
return 0;
}
@@ -151,16 +152,43 @@ static __maybe_unused int drv_resume(struct device *dev)
{
struct drm_device *ddev = dev_get_drvdata(dev);
struct ltdc_device *ldev = ddev->dev_private;
+ int ret;
+
+ if (WARN_ON(!ldev->suspend_state))
+ return -ENOENT;
+
+ pm_runtime_force_resume(dev);
+ ret = drm_atomic_helper_resume(ddev, ldev->suspend_state);
+ if (ret)
+ pm_runtime_force_suspend(dev);
+
+ ldev->suspend_state = NULL;
+
+ return ret;
+}
- ltdc_resume(ddev);
- drm_atomic_helper_resume(ddev, ldev->suspend_state);
- drm_kms_helper_poll_enable(ddev);
+static __maybe_unused int drv_runtime_suspend(struct device *dev)
+{
+ struct drm_device *ddev = dev_get_drvdata(dev);
+
+ DRM_DEBUG_DRIVER("\n");
+ ltdc_suspend(ddev);
return 0;
}
+static __maybe_unused int drv_runtime_resume(struct device *dev)
+{
+ struct drm_device *ddev = dev_get_drvdata(dev);
+
+ DRM_DEBUG_DRIVER("\n");
+ return ltdc_resume(ddev);
+}
+
static const struct dev_pm_ops drv_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(drv_suspend, drv_resume)
+ SET_RUNTIME_PM_OPS(drv_runtime_suspend,
+ drv_runtime_resume, NULL)
};
static int stm_drm_platform_probe(struct platform_device *pdev)
diff --git a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
index 1bef73e8c8fe..0ab32fee6c1b 100644
--- a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
+++ b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c
@@ -9,6 +9,7 @@
#include <linux/clk.h>
#include <linux/iopoll.h>
#include <linux/module.h>
+#include <linux/regulator/consumer.h>
#include <drm/drmP.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/bridge/dw_mipi_dsi.h>
@@ -76,6 +77,7 @@ struct dw_mipi_dsi_stm {
u32 hw_version;
int lane_min_kbps;
int lane_max_kbps;
+ struct regulator *vdd_supply;
};
static inline void dsi_write(struct dw_mipi_dsi_stm *dsi, u32 reg, u32 val)
@@ -208,10 +210,27 @@ static int dw_mipi_dsi_phy_init(void *priv_data)
if (ret)
DRM_DEBUG_DRIVER("!TIMEOUT! waiting PLL, let's continue\n");
+ return 0;
+}
+
+static void dw_mipi_dsi_phy_power_on(void *priv_data)
+{
+ struct dw_mipi_dsi_stm *dsi = priv_data;
+
+ DRM_DEBUG_DRIVER("\n");
+
/* Enable the DSI wrapper */
dsi_set(dsi, DSI_WCR, WCR_DSIEN);
+}
- return 0;
+static void dw_mipi_dsi_phy_power_off(void *priv_data)
+{
+ struct dw_mipi_dsi_stm *dsi = priv_data;
+
+ DRM_DEBUG_DRIVER("\n");
+
+ /* Disable the DSI wrapper */
+ dsi_clear(dsi, DSI_WCR, WCR_DSIEN);
}
static int
@@ -225,7 +244,6 @@ dw_mipi_dsi_get_lane_mbps(void *priv_data, const struct drm_display_mode *mode,
u32 val;
/* Update lane capabilities according to hw version */
- dsi->hw_version = dsi_read(dsi, DSI_VERSION) & VERSION;
dsi->lane_min_kbps = LANE_MIN_KBPS;
dsi->lane_max_kbps = LANE_MAX_KBPS;
if (dsi->hw_version == HWVER_131) {
@@ -286,6 +304,8 @@ dw_mipi_dsi_get_lane_mbps(void *priv_data, const struct drm_display_mode *mode,
static const struct dw_mipi_dsi_phy_ops dw_mipi_dsi_stm_phy_ops = {
.init = dw_mipi_dsi_phy_init,
+ .power_on = dw_mipi_dsi_phy_power_on,
+ .power_off = dw_mipi_dsi_phy_power_off,
.get_lane_mbps = dw_mipi_dsi_get_lane_mbps,
};
@@ -304,6 +324,7 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct dw_mipi_dsi_stm *dsi;
+ struct clk *pclk;
struct resource *res;
int ret;
@@ -314,21 +335,58 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev)
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
dsi->base = devm_ioremap_resource(dev, res);
if (IS_ERR(dsi->base)) {
- DRM_ERROR("Unable to get dsi registers\n");
- return PTR_ERR(dsi->base);
+ ret = PTR_ERR(dsi->base);
+ DRM_ERROR("Unable to get dsi registers %d\n", ret);
+ return ret;
+ }
+
+ dsi->vdd_supply = devm_regulator_get(dev, "phy-dsi");
+ if (IS_ERR(dsi->vdd_supply)) {
+ ret = PTR_ERR(dsi->vdd_supply);
+ if (ret != -EPROBE_DEFER)
+ DRM_ERROR("Failed to request regulator: %d\n", ret);
+ return ret;
+ }
+
+ ret = regulator_enable(dsi->vdd_supply);
+ if (ret) {
+ DRM_ERROR("Failed to enable regulator: %d\n", ret);
+ return ret;
}
dsi->pllref_clk = devm_clk_get(dev, "ref");
if (IS_ERR(dsi->pllref_clk)) {
ret = PTR_ERR(dsi->pllref_clk);
- dev_err(dev, "Unable to get pll reference clock: %d\n", ret);
- return ret;
+ DRM_ERROR("Unable to get pll reference clock: %d\n", ret);
+ goto err_clk_get;
}
ret = clk_prepare_enable(dsi->pllref_clk);
if (ret) {
- dev_err(dev, "%s: Failed to enable pllref_clk\n", __func__);
- return ret;
+ DRM_ERROR("Failed to enable pllref_clk: %d\n", ret);
+ goto err_clk_get;
+ }
+
+ pclk = devm_clk_get(dev, "pclk");
+ if (IS_ERR(pclk)) {
+ ret = PTR_ERR(pclk);
+ DRM_ERROR("Unable to get peripheral clock: %d\n", ret);
+ goto err_dsi_probe;
+ }
+
+ ret = clk_prepare_enable(pclk);
+ if (ret) {
+ DRM_ERROR("%s: Failed to enable peripheral clk\n", __func__);
+ goto err_dsi_probe;
+ }
+
+ dsi->hw_version = dsi_read(dsi, DSI_VERSION) & VERSION;
+ clk_disable_unprepare(pclk);
+
+ if (dsi->hw_version != HWVER_130 && dsi->hw_version != HWVER_131) {
+ ret = -ENODEV;
+ DRM_ERROR("bad dsi hardware version\n");
+ goto err_dsi_probe;
}
dw_mipi_dsi_stm_plat_data.base = dsi->base;
@@ -338,20 +396,28 @@ static int dw_mipi_dsi_stm_probe(struct platform_device *pdev)
dsi->dsi = dw_mipi_dsi_probe(pdev, &dw_mipi_dsi_stm_plat_data);
if (IS_ERR(dsi->dsi)) {
- DRM_ERROR("Failed to initialize mipi dsi host\n");
- clk_disable_unprepare(dsi->pllref_clk);
- return PTR_ERR(dsi->dsi);
+ ret = PTR_ERR(dsi->dsi);
+ DRM_ERROR("Failed to initialize mipi dsi host: %d\n", ret);
+ goto err_dsi_probe;
}
return 0;
+
+err_dsi_probe:
+ clk_disable_unprepare(dsi->pllref_clk);
+err_clk_get:
+ regulator_disable(dsi->vdd_supply);
+
+ return ret;
}
static int dw_mipi_dsi_stm_remove(struct platform_device *pdev)
{
struct dw_mipi_dsi_stm *dsi = platform_get_drvdata(pdev);
- clk_disable_unprepare(dsi->pllref_clk);
dw_mipi_dsi_remove(dsi->dsi);
+ clk_disable_unprepare(dsi->pllref_clk);
+ regulator_disable(dsi->vdd_supply);
return 0;
}
@@ -363,6 +429,7 @@ static int __maybe_unused dw_mipi_dsi_stm_suspend(struct device *dev)
DRM_DEBUG_DRIVER("\n");
clk_disable_unprepare(dsi->pllref_clk);
+ regulator_disable(dsi->vdd_supply);
return 0;
}
@@ -370,10 +437,22 @@ static int __maybe_unused dw_mipi_dsi_stm_suspend(struct device *dev)
static int __maybe_unused dw_mipi_dsi_stm_resume(struct device *dev)
{
struct dw_mipi_dsi_stm *dsi = dw_mipi_dsi_stm_plat_data.priv_data;
+ int ret;
DRM_DEBUG_DRIVER("\n");
- clk_prepare_enable(dsi->pllref_clk);
+ ret = regulator_enable(dsi->vdd_supply);
+ if (ret) {
+ DRM_ERROR("Failed to enable regulator: %d\n", ret);
+ return ret;
+ }
+
+ ret = clk_prepare_enable(dsi->pllref_clk);
+ if (ret) {
+ regulator_disable(dsi->vdd_supply);
+ DRM_ERROR("Failed to enable pllref_clk: %d\n", ret);
+ return ret;
+ }
return 0;
}
diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
index 32fd6a3b37fb..2fe6c4a8d915 100644
--- a/drivers/gpu/drm/stm/ltdc.c
+++ b/drivers/gpu/drm/stm/ltdc.c
@@ -16,6 +16,7 @@
#include <linux/of_address.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
#include <linux/reset.h>
#include <drm/drm_atomic.h>
@@ -232,6 +233,11 @@ static const enum ltdc_pix_fmt ltdc_pix_fmt_a1[NB_PF] = {
PF_ARGB4444 /* 0x07 */
};
+static const u64 ltdc_format_modifiers[] = {
+ DRM_FORMAT_MOD_LINEAR,
+ DRM_FORMAT_MOD_INVALID
+};
+
static inline u32 reg_read(void __iomem *base, u32 reg)
{
return readl_relaxed(base + reg);
@@ -426,8 +432,8 @@ static void ltdc_crtc_atomic_enable(struct drm_crtc *crtc,
/* Enable IRQ */
reg_set(ldev->regs, LTDC_IER, IER_RRIE | IER_FUIE | IER_TERRIE);
- /* Immediately commit the planes */
- reg_set(ldev->regs, LTDC_SRCR, SRCR_IMR);
+ /* Commit shadow registers = update planes at next vblank */
+ reg_set(ldev->regs, LTDC_SRCR, SRCR_VBR);
/* Enable LTDC */
reg_set(ldev->regs, LTDC_GCR, GCR_LTDCEN);
@@ -439,6 +445,7 @@ static void ltdc_crtc_atomic_disable(struct drm_crtc *crtc,
struct drm_crtc_state *old_state)
{
struct ltdc_device *ldev = crtc_to_ltdc(crtc);
+ struct drm_device *ddev = crtc->dev;
DRM_DEBUG_DRIVER("\n");
@@ -452,6 +459,8 @@ static void ltdc_crtc_atomic_disable(struct drm_crtc *crtc,
/* immediately commit disable of layers before switching off LTDC */
reg_set(ldev->regs, LTDC_SRCR, SRCR_IMR);
+
+ pm_runtime_put_sync(ddev->dev);
}
#define CLK_TOLERANCE_HZ 50
@@ -500,33 +509,55 @@ static bool ltdc_crtc_mode_fixup(struct drm_crtc *crtc,
struct drm_display_mode *adjusted_mode)
{
struct ltdc_device *ldev = crtc_to_ltdc(crtc);
+ struct drm_device *ddev = crtc->dev;
int rate = mode->clock * 1000;
+ bool runtime_active;
+ int ret;
- /*
- * TODO clk_round_rate() does not work yet. When ready, it can
- * be used instead of clk_set_rate() then clk_get_rate().
- */
+ runtime_active = pm_runtime_active(ddev->dev);
+
+ if (runtime_active)
+ pm_runtime_put_sync(ddev->dev);
- clk_disable(ldev->pixel_clk);
if (clk_set_rate(ldev->pixel_clk, rate) < 0) {
DRM_ERROR("Cannot set rate (%dHz) for pixel clk\n", rate);
return false;
}
- clk_enable(ldev->pixel_clk);
adjusted_mode->clock = clk_get_rate(ldev->pixel_clk) / 1000;
+ if (runtime_active) {
+ ret = pm_runtime_get_sync(ddev->dev);
+ if (ret) {
+ DRM_ERROR("Failed to fixup mode, cannot get sync\n");
+ return false;
+ }
+ }
+
+ DRM_DEBUG_DRIVER("requested clock %dkHz, adjusted clock %dkHz\n",
+ mode->clock, adjusted_mode->clock);
+
return true;
}
static void ltdc_crtc_mode_set_nofb(struct drm_crtc *crtc)
{
struct ltdc_device *ldev = crtc_to_ltdc(crtc);
+ struct drm_device *ddev = crtc->dev;
struct drm_display_mode *mode = &crtc->state->adjusted_mode;
struct videomode vm;
u32 hsync, vsync, accum_hbp, accum_vbp, accum_act_w, accum_act_h;
u32 total_width, total_height;
u32 val;
+ int ret;
+
+ if (!pm_runtime_active(ddev->dev)) {
+ ret = pm_runtime_get_sync(ddev->dev);
+ if (ret) {
+ DRM_ERROR("Failed to set mode, cannot get sync\n");
+ return;
+ }
+ }
drm_display_mode_to_videomode(mode, &vm);
@@ -555,7 +586,7 @@ static void ltdc_crtc_mode_set_nofb(struct drm_crtc *crtc)
if (vm.flags & DISPLAY_FLAGS_VSYNC_HIGH)
val |= GCR_VSPOL;
- if (vm.flags & DISPLAY_FLAGS_DE_HIGH)
+ if (vm.flags & DISPLAY_FLAGS_DE_LOW)
val |= GCR_DEPOL;
if (vm.flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE)
@@ -587,6 +618,7 @@ static void ltdc_crtc_atomic_flush(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state)
{
struct ltdc_device *ldev = crtc_to_ltdc(crtc);
+ struct drm_device *ddev = crtc->dev;
struct drm_pending_vblank_event *event = crtc->state->event;
DRM_DEBUG_ATOMIC("\n");
@@ -599,12 +631,12 @@ static void ltdc_crtc_atomic_flush(struct drm_crtc *crtc,
if (event) {
crtc->state->event = NULL;
- spin_lock_irq(&crtc->dev->event_lock);
+ spin_lock_irq(&ddev->event_lock);
if (drm_crtc_vblank_get(crtc) == 0)
drm_crtc_arm_vblank_event(crtc, event);
else
drm_crtc_send_vblank_event(crtc, event);
- spin_unlock_irq(&crtc->dev->event_lock);
+ spin_unlock_irq(&ddev->event_lock);
}
}
@@ -660,15 +692,19 @@ bool ltdc_crtc_scanoutpos(struct drm_device *ddev, unsigned int pipe,
* Computation for the two first cases are identical so we can
* simplify the code and only test if line > vactive_end
*/
- line = reg_read(ldev->regs, LTDC_CPSR) & CPSR_CYPOS;
- vactive_start = reg_read(ldev->regs, LTDC_BPCR) & BPCR_AVBP;
- vactive_end = reg_read(ldev->regs, LTDC_AWCR) & AWCR_AAH;
- vtotal = reg_read(ldev->regs, LTDC_TWCR) & TWCR_TOTALH;
-
- if (line > vactive_end)
- *vpos = line - vtotal - vactive_start;
- else
- *vpos = line - vactive_start;
+ if (pm_runtime_active(ddev->dev)) {
+ line = reg_read(ldev->regs, LTDC_CPSR) & CPSR_CYPOS;
+ vactive_start = reg_read(ldev->regs, LTDC_BPCR) & BPCR_AVBP;
+ vactive_end = reg_read(ldev->regs, LTDC_AWCR) & AWCR_AAH;
+ vtotal = reg_read(ldev->regs, LTDC_TWCR) & TWCR_TOTALH;
+
+ if (line > vactive_end)
+ *vpos = line - vtotal - vactive_start;
+ else
+ *vpos = line - vactive_start;
+ } else {
+ *vpos = 0;
+ }
*hpos = 0;
@@ -779,7 +815,7 @@ static void ltdc_plane_atomic_update(struct drm_plane *plane,
/* Configures the color frame buffer pitch in bytes & line length */
pitch_in_bytes = fb->pitches[0];
- line_length = drm_format_plane_cpp(fb->format->format, 0) *
+ line_length = fb->format->cpp[0] *
(x1 - x0 + 1) + (ldev->caps.bus_width >> 3) - 1;
val = ((pitch_in_bytes << 16) | line_length);
reg_update_bits(ldev->regs, LTDC_L1CFBLR + lofs,
@@ -822,11 +858,11 @@ static void ltdc_plane_atomic_update(struct drm_plane *plane,
mutex_lock(&ldev->err_lock);
if (ldev->error_status & ISR_FUIF) {
- DRM_DEBUG_DRIVER("Fifo underrun\n");
+ DRM_WARN("ltdc fifo underrun: please verify display mode\n");
ldev->error_status &= ~ISR_FUIF;
}
if (ldev->error_status & ISR_TERRIF) {
- DRM_DEBUG_DRIVER("Transfer error\n");
+ DRM_WARN("ltdc transfer error\n");
ldev->error_status &= ~ISR_TERRIF;
}
mutex_unlock(&ldev->err_lock);
@@ -864,6 +900,16 @@ static void ltdc_plane_atomic_print_state(struct drm_printer *p,
fpsi->counter = 0;
}
+static bool ltdc_plane_format_mod_supported(struct drm_plane *plane,
+ u32 format,
+ u64 modifier)
+{
+ if (modifier == DRM_FORMAT_MOD_LINEAR)
+ return true;
+
+ return false;
+}
+
static const struct drm_plane_funcs ltdc_plane_funcs = {
.update_plane = drm_atomic_helper_update_plane,
.disable_plane = drm_atomic_helper_disable_plane,
@@ -872,6 +918,7 @@ static const struct drm_plane_funcs ltdc_plane_funcs = {
.atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
.atomic_print_state = ltdc_plane_atomic_print_state,
+ .format_mod_supported = ltdc_plane_format_mod_supported,
};
static const struct drm_plane_helper_funcs ltdc_plane_helper_funcs = {
@@ -890,6 +937,7 @@ static struct drm_plane *ltdc_plane_create(struct drm_device *ddev,
unsigned int i, nb_fmt = 0;
u32 formats[NB_PF * 2];
u32 drm_fmt, drm_fmt_no_alpha;
+ const u64 *modifiers = ltdc_format_modifiers;
int ret;
/* Get supported pixel formats */
@@ -918,7 +966,7 @@ static struct drm_plane *ltdc_plane_create(struct drm_device *ddev,
ret = drm_universal_plane_init(ddev, plane, possible_crtcs,
&ltdc_plane_funcs, formats, nb_fmt,
- NULL, type, NULL);
+ modifiers, type, NULL);
if (ret < 0)
return NULL;
@@ -1021,10 +1069,13 @@ static int ltdc_get_caps(struct drm_device *ddev)
struct ltdc_device *ldev = ddev->dev_private;
u32 bus_width_log2, lcr, gc2r;
- /* at least 1 layer must be managed */
+ /*
+ * at least 1 layer must be managed & the number of layers
+ * must not exceed LTDC_MAX_LAYER
+ */
lcr = reg_read(ldev->regs, LTDC_LCR);
- ldev->caps.nb_layers = max_t(int, lcr, 1);
+ ldev->caps.nb_layers = clamp((int)lcr, 1, LTDC_MAX_LAYER);
/* set data bus width */
gc2r = reg_read(ldev->regs, LTDC_GC2R);
@@ -1125,8 +1176,9 @@ int ltdc_load(struct drm_device *ddev)
ldev->pixel_clk = devm_clk_get(dev, "lcd");
if (IS_ERR(ldev->pixel_clk)) {
- DRM_ERROR("Unable to get lcd clock\n");
- return -ENODEV;
+ if (PTR_ERR(ldev->pixel_clk) != -EPROBE_DEFER)
+ DRM_ERROR("Unable to get lcd clock\n");
+ return PTR_ERR(ldev->pixel_clk);
}
if (clk_prepare_enable(ldev->pixel_clk)) {
@@ -1134,6 +1186,12 @@ int ltdc_load(struct drm_device *ddev)
return -ENODEV;
}
+ if (!IS_ERR(rstc)) {
+ reset_control_assert(rstc);
+ usleep_range(10, 20);
+ reset_control_deassert(rstc);
+ }
+
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
ldev->regs = devm_ioremap_resource(dev, res);
if (IS_ERR(ldev->regs)) {
@@ -1142,8 +1200,15 @@ int ltdc_load(struct drm_device *ddev)
goto err;
}
+ /* Disable interrupts */
+ reg_clear(ldev->regs, LTDC_IER,
+ IER_LIE | IER_RRIE | IER_FUIE | IER_TERRIE);
+
for (i = 0; i < MAX_IRQ; i++) {
irq = platform_get_irq(pdev, i);
+ if (irq == -EPROBE_DEFER)
+ goto err;
+
if (irq < 0)
continue;
@@ -1156,15 +1221,6 @@ int ltdc_load(struct drm_device *ddev)
}
}
- if (!IS_ERR(rstc)) {
- reset_control_assert(rstc);
- usleep_range(10, 20);
- reset_control_deassert(rstc);
- }
-
- /* Disable interrupts */
- reg_clear(ldev->regs, LTDC_IER,
- IER_LIE | IER_RRIE | IER_FUIE | IER_TERRIE);
ret = ltdc_get_caps(ddev);
if (ret) {
@@ -1173,7 +1229,7 @@ int ltdc_load(struct drm_device *ddev)
goto err;
}
- DRM_INFO("ltdc hw version 0x%08x - ready\n", ldev->caps.hw_version);
+ DRM_DEBUG_DRIVER("ltdc hw version 0x%08x\n", ldev->caps.hw_version);
/* Add endpoints panels or bridges if any */
for (i = 0; i < MAX_ENDPOINTS; i++) {
@@ -1203,6 +1259,8 @@ int ltdc_load(struct drm_device *ddev)
goto err;
}
+ ddev->mode_config.allow_fb_modifiers = true;
+
ret = ltdc_crtc_init(ddev, crtc);
if (ret) {
DRM_ERROR("Failed to init crtc\n");
@@ -1218,8 +1276,11 @@ int ltdc_load(struct drm_device *ddev)
/* Allow usage of vblank without having to call drm_irq_install */
ddev->irq_enabled = 1;
- return 0;
+ clk_disable_unprepare(ldev->pixel_clk);
+
+ pm_runtime_enable(ddev->dev);
+ return 0;
err:
for (i = 0; i < MAX_ENDPOINTS; i++)
drm_panel_bridge_remove(bridge[i]);
@@ -1231,7 +1292,6 @@ err:
void ltdc_unload(struct drm_device *ddev)
{
- struct ltdc_device *ldev = ddev->dev_private;
int i;
DRM_DEBUG_DRIVER("\n");
@@ -1239,7 +1299,7 @@ void ltdc_unload(struct drm_device *ddev)
for (i = 0; i < MAX_ENDPOINTS; i++)
drm_of_panel_bridge_remove(ddev->dev->of_node, 0, i);
- clk_disable_unprepare(ldev->pixel_clk);
+ pm_runtime_disable(ddev->dev);
}
MODULE_AUTHOR("Philippe Cornu <philippe.cornu@st.com>");
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2025-05-12 02:45:13 +0200