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path: root/drivers/gpu/drm/pl111/pl111_drv.c
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Diffstat (limited to 'drivers/gpu/drm/pl111/pl111_drv.c')
-rw-r--r--drivers/gpu/drm/pl111/pl111_drv.c149
1 files changed, 125 insertions, 24 deletions
diff --git a/drivers/gpu/drm/pl111/pl111_drv.c b/drivers/gpu/drm/pl111/pl111_drv.c
index 581c452cede1..201d57d5cb54 100644
--- a/drivers/gpu/drm/pl111/pl111_drv.c
+++ b/drivers/gpu/drm/pl111/pl111_drv.c
@@ -41,9 +41,6 @@
* - Fix race between setting plane base address and getting IRQ for
* vsync firing the pageflip completion.
*
- * - Expose the correct set of formats we can support based on the
- * "arm,pl11x,tft-r0g0b0-pads" DT property.
- *
* - Use the "max-memory-bandwidth" DT property to filter the
* supported formats.
*
@@ -68,8 +65,12 @@
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_of.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_panel.h>
#include "pl111_drm.h"
+#include "pl111_versatile.h"
#define DRIVER_DESC "DRM module for PL111"
@@ -83,6 +84,8 @@ static int pl111_modeset_init(struct drm_device *dev)
{
struct drm_mode_config *mode_config;
struct pl111_drm_dev_private *priv = dev->dev_private;
+ struct drm_panel *panel;
+ struct drm_bridge *bridge;
int ret = 0;
drm_mode_config_init(dev);
@@ -93,34 +96,43 @@ static int pl111_modeset_init(struct drm_device *dev)
mode_config->min_height = 1;
mode_config->max_height = 768;
- ret = pl111_connector_init(dev);
- if (ret) {
- dev_err(dev->dev, "Failed to create pl111_drm_connector\n");
- goto out_config;
- }
-
- /* Don't actually attach if we didn't find a drm_panel
- * attached to us. This will allow a kernel to include both
- * the fbdev pl111 driver and this one, and choose between
- * them based on which subsystem has support for the panel.
- */
- if (!priv->connector.panel) {
- dev_info(dev->dev,
- "Disabling due to lack of DRM panel device.\n");
- ret = -ENODEV;
- goto out_config;
+ ret = drm_of_find_panel_or_bridge(dev->dev->of_node,
+ 0, 0, &panel, &bridge);
+ if (ret && ret != -ENODEV)
+ return ret;
+ if (panel) {
+ bridge = drm_panel_bridge_add(panel,
+ DRM_MODE_CONNECTOR_Unknown);
+ if (IS_ERR(bridge)) {
+ ret = PTR_ERR(bridge);
+ goto out_config;
+ }
+ /*
+ * TODO: when we are using a different bridge than a panel
+ * (such as a dumb VGA connector) we need to devise a different
+ * method to get the connector out of the bridge.
+ */
}
ret = pl111_display_init(dev);
if (ret != 0) {
dev_err(dev->dev, "Failed to init display\n");
- goto out_config;
+ goto out_bridge;
}
+ ret = drm_simple_display_pipe_attach_bridge(&priv->pipe,
+ bridge);
+ if (ret)
+ return ret;
+
+ priv->bridge = bridge;
+ priv->panel = panel;
+ priv->connector = panel->connector;
+
ret = drm_vblank_init(dev, 1);
if (ret != 0) {
dev_err(dev->dev, "Failed to init vblank\n");
- goto out_config;
+ goto out_bridge;
}
drm_mode_config_reset(dev);
@@ -132,6 +144,9 @@ static int pl111_modeset_init(struct drm_device *dev)
goto finish;
+out_bridge:
+ if (panel)
+ drm_panel_bridge_remove(bridge);
out_config:
drm_mode_config_cleanup(dev);
finish:
@@ -183,6 +198,7 @@ static int pl111_amba_probe(struct amba_device *amba_dev,
{
struct device *dev = &amba_dev->dev;
struct pl111_drm_dev_private *priv;
+ struct pl111_variant_data *variant = id->data;
struct drm_device *drm;
int ret;
@@ -196,6 +212,33 @@ static int pl111_amba_probe(struct amba_device *amba_dev,
amba_set_drvdata(amba_dev, drm);
priv->drm = drm;
drm->dev_private = priv;
+ priv->variant = variant;
+
+ /*
+ * The PL110 and PL111 variants have two registers
+ * swapped: interrupt enable and control. For this reason
+ * we use offsets that we can change per variant.
+ */
+ if (variant->is_pl110) {
+ /*
+ * The ARM Versatile boards are even more special:
+ * their PrimeCell ID say they are PL110 but the
+ * control and interrupt enable registers are anyway
+ * swapped to the PL111 order so they are not following
+ * the PL110 datasheet.
+ */
+ if (of_machine_is_compatible("arm,versatile-ab") ||
+ of_machine_is_compatible("arm,versatile-pb")) {
+ priv->ienb = CLCD_PL111_IENB;
+ priv->ctrl = CLCD_PL111_CNTL;
+ } else {
+ priv->ienb = CLCD_PL110_IENB;
+ priv->ctrl = CLCD_PL110_CNTL;
+ }
+ } else {
+ priv->ienb = CLCD_PL111_IENB;
+ priv->ctrl = CLCD_PL111_CNTL;
+ }
priv->regs = devm_ioremap_resource(dev, &amba_dev->res);
if (IS_ERR(priv->regs)) {
@@ -204,15 +247,19 @@ static int pl111_amba_probe(struct amba_device *amba_dev,
}
/* turn off interrupts before requesting the irq */
- writel(0, priv->regs + CLCD_PL111_IENB);
+ writel(0, priv->regs + priv->ienb);
ret = devm_request_irq(dev, amba_dev->irq[0], pl111_irq, 0,
- "pl111", priv);
+ variant->name, priv);
if (ret != 0) {
dev_err(dev, "%s failed irq %d\n", __func__, ret);
return ret;
}
+ ret = pl111_versatile_init(dev, priv);
+ if (ret)
+ goto dev_unref;
+
ret = pl111_modeset_init(drm);
if (ret != 0)
goto dev_unref;
@@ -236,16 +283,70 @@ static int pl111_amba_remove(struct amba_device *amba_dev)
drm_dev_unregister(drm);
if (priv->fbdev)
drm_fbdev_cma_fini(priv->fbdev);
+ if (priv->panel)
+ drm_panel_bridge_remove(priv->bridge);
drm_mode_config_cleanup(drm);
drm_dev_unref(drm);
return 0;
}
-static struct amba_id pl111_id_table[] = {
+/*
+ * This variant exist in early versions like the ARM Integrator
+ * and this version lacks the 565 and 444 pixel formats.
+ */
+static const u32 pl110_pixel_formats[] = {
+ DRM_FORMAT_ABGR8888,
+ DRM_FORMAT_XBGR8888,
+ DRM_FORMAT_ARGB8888,
+ DRM_FORMAT_XRGB8888,
+ DRM_FORMAT_ABGR1555,
+ DRM_FORMAT_XBGR1555,
+ DRM_FORMAT_ARGB1555,
+ DRM_FORMAT_XRGB1555,
+};
+
+static const struct pl111_variant_data pl110_variant = {
+ .name = "PL110",
+ .is_pl110 = true,
+ .formats = pl110_pixel_formats,
+ .nformats = ARRAY_SIZE(pl110_pixel_formats),
+};
+
+/* RealView, Versatile Express etc use this modern variant */
+static const u32 pl111_pixel_formats[] = {
+ DRM_FORMAT_ABGR8888,
+ DRM_FORMAT_XBGR8888,
+ DRM_FORMAT_ARGB8888,
+ DRM_FORMAT_XRGB8888,
+ DRM_FORMAT_BGR565,
+ DRM_FORMAT_RGB565,
+ DRM_FORMAT_ABGR1555,
+ DRM_FORMAT_XBGR1555,
+ DRM_FORMAT_ARGB1555,
+ DRM_FORMAT_XRGB1555,
+ DRM_FORMAT_ABGR4444,
+ DRM_FORMAT_XBGR4444,
+ DRM_FORMAT_ARGB4444,
+ DRM_FORMAT_XRGB4444,
+};
+
+static const struct pl111_variant_data pl111_variant = {
+ .name = "PL111",
+ .formats = pl111_pixel_formats,
+ .nformats = ARRAY_SIZE(pl111_pixel_formats),
+};
+
+static const struct amba_id pl111_id_table[] = {
+ {
+ .id = 0x00041110,
+ .mask = 0x000fffff,
+ .data = (void*)&pl110_variant,
+ },
{
.id = 0x00041111,
.mask = 0x000fffff,
+ .data = (void*)&pl111_variant,
},
{0, 0},
};
generated by cgit v1.2.3 (git 2.39.0) at 2024-10-31 16:21:52 +0300