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path: root/drivers/gpu/drm/i915/display/intel_dsi.c
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Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dsi.c')
-rw-r--r--drivers/gpu/drm/i915/display/intel_dsi.c128
1 files changed, 128 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dsi.c b/drivers/gpu/drm/i915/display/intel_dsi.c
new file mode 100644
index 000000000000..5fec02aceaed
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_dsi.c
@@ -0,0 +1,128 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2018 Intel Corporation
+ */
+
+#include <drm/drm_mipi_dsi.h>
+#include "intel_dsi.h"
+
+int intel_dsi_bitrate(const struct intel_dsi *intel_dsi)
+{
+ int bpp = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format);
+
+ if (WARN_ON(bpp < 0))
+ bpp = 16;
+
+ return intel_dsi->pclk * bpp / intel_dsi->lane_count;
+}
+
+int intel_dsi_tlpx_ns(const struct intel_dsi *intel_dsi)
+{
+ switch (intel_dsi->escape_clk_div) {
+ default:
+ case 0:
+ return 50;
+ case 1:
+ return 100;
+ case 2:
+ return 200;
+ }
+}
+
+int intel_dsi_get_modes(struct drm_connector *connector)
+{
+ struct intel_connector *intel_connector = to_intel_connector(connector);
+ struct drm_display_mode *mode;
+
+ DRM_DEBUG_KMS("\n");
+
+ if (!intel_connector->panel.fixed_mode) {
+ DRM_DEBUG_KMS("no fixed mode\n");
+ return 0;
+ }
+
+ mode = drm_mode_duplicate(connector->dev,
+ intel_connector->panel.fixed_mode);
+ if (!mode) {
+ DRM_DEBUG_KMS("drm_mode_duplicate failed\n");
+ return 0;
+ }
+
+ drm_mode_probed_add(connector, mode);
+ return 1;
+}
+
+enum drm_mode_status intel_dsi_mode_valid(struct drm_connector *connector,
+ struct drm_display_mode *mode)
+{
+ struct intel_connector *intel_connector = to_intel_connector(connector);
+ const struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode;
+ int max_dotclk = to_i915(connector->dev)->max_dotclk_freq;
+
+ DRM_DEBUG_KMS("\n");
+
+ if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
+ return MODE_NO_DBLESCAN;
+
+ if (fixed_mode) {
+ if (mode->hdisplay > fixed_mode->hdisplay)
+ return MODE_PANEL;
+ if (mode->vdisplay > fixed_mode->vdisplay)
+ return MODE_PANEL;
+ if (fixed_mode->clock > max_dotclk)
+ return MODE_CLOCK_HIGH;
+ }
+
+ return MODE_OK;
+}
+
+struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi,
+ const struct mipi_dsi_host_ops *funcs,
+ enum port port)
+{
+ struct intel_dsi_host *host;
+ struct mipi_dsi_device *device;
+
+ host = kzalloc(sizeof(*host), GFP_KERNEL);
+ if (!host)
+ return NULL;
+
+ host->base.ops = funcs;
+ host->intel_dsi = intel_dsi;
+ host->port = port;
+
+ /*
+ * We should call mipi_dsi_host_register(&host->base) here, but we don't
+ * have a host->dev, and we don't have OF stuff either. So just use the
+ * dsi framework as a library and hope for the best. Create the dsi
+ * devices by ourselves here too. Need to be careful though, because we
+ * don't initialize any of the driver model devices here.
+ */
+ device = kzalloc(sizeof(*device), GFP_KERNEL);
+ if (!device) {
+ kfree(host);
+ return NULL;
+ }
+
+ device->host = &host->base;
+ host->device = device;
+
+ return host;
+}
+
+enum drm_panel_orientation
+intel_dsi_get_panel_orientation(struct intel_connector *connector)
+{
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ enum drm_panel_orientation orientation;
+
+ orientation = dev_priv->vbt.dsi.orientation;
+ if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
+ return orientation;
+
+ orientation = dev_priv->vbt.orientation;
+ if (orientation != DRM_MODE_PANEL_ORIENTATION_UNKNOWN)
+ return orientation;
+
+ return DRM_MODE_PANEL_ORIENTATION_NORMAL;
+}