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authorJan-Simon Moeller <jsmoeller@linuxfoundation.org>2019-06-09 21:55:28 +0000
committerGerrit Code Review <gerrit@automotivelinux.org>2019-06-09 21:55:28 +0000
commit50a2eecc8e61647a2a5142a154232fe87fdd37f9 (patch)
treeb7784813fdd658322504fd89cb4163f4d34db302 /meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi/dsi/0002-drm-vc4-Make-DSI-call-into-the-bridge-after-the-DSI-.patch
parentdf96ae5d6ac1039a228026f76e93a6499d61762a (diff)
parentccb667c35ffdea7a2bc1304750e6b22368cd55f7 (diff)
Merge "Fix rpi touchscreen support on master"
Diffstat (limited to 'meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi/dsi/0002-drm-vc4-Make-DSI-call-into-the-bridge-after-the-DSI-.patch')
-rw-r--r--meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi/dsi/0002-drm-vc4-Make-DSI-call-into-the-bridge-after-the-DSI-.patch102
1 files changed, 102 insertions, 0 deletions
diff --git a/meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi/dsi/0002-drm-vc4-Make-DSI-call-into-the-bridge-after-the-DSI-.patch b/meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi/dsi/0002-drm-vc4-Make-DSI-call-into-the-bridge-after-the-DSI-.patch
new file mode 100644
index 000000000..13d821418
--- /dev/null
+++ b/meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi/dsi/0002-drm-vc4-Make-DSI-call-into-the-bridge-after-the-DSI-.patch
@@ -0,0 +1,102 @@
+From ab06860f2361a3750ec3a62347e0fdd7873cb30d Mon Sep 17 00:00:00 2001
+From: Kevin Quigley <kevin@kquigley.co.uk>
+Date: Mon, 24 Sep 2018 18:07:40 +0000
+Subject: [PATCH 2/4] drm/vc4: Make DSI call into the bridge after the DSI link
+ is enabled. bring this patch https://patchwork.kernel.org/patch/10480937/ to
+ Linux rpi-4.14.y
+
+This allows panels or bridges that need to send DSI commands during
+pre_enable() to successfully send them. We delay DISP0 (aka the
+actual display) enabling until after pre_enable so that pixels aren't
+streaming before then.
+
+v2: Just clear out the encoder->bridge value to disable the midlayer
+ calls (idea by Andrzej Hajda).
+---
+ drivers/gpu/drm/vc4/vc4_dsi.c | 48 ++++++++++++++++++++++++-----------
+ 1 file changed, 33 insertions(+), 15 deletions(-)
+
+diff --git a/drivers/gpu/drm/vc4/vc4_dsi.c b/drivers/gpu/drm/vc4/vc4_dsi.c
+index a3f416cbd1d6..3fa2db18d70f 100644
+--- a/drivers/gpu/drm/vc4/vc4_dsi.c
++++ b/drivers/gpu/drm/vc4/vc4_dsi.c
+@@ -814,7 +814,9 @@ static void vc4_dsi_encoder_disable(struct drm_encoder *encoder)
+ struct vc4_dsi *dsi = vc4_encoder->dsi;
+ struct device *dev = &dsi->pdev->dev;
+
++ drm_bridge_disable(dsi->bridge);
+ vc4_dsi_ulps(dsi, true);
++ drm_bridge_post_disable(dsi->bridge);
+
+ clk_disable_unprepare(dsi->pll_phy_clock);
+ clk_disable_unprepare(dsi->escape_clock);
+@@ -1089,21 +1091,6 @@ static void vc4_dsi_encoder_enable(struct drm_encoder *encoder)
+ /* Display reset sequence timeout */
+ DSI_PORT_WRITE(PR_TO_CNT, 100000);
+
+- if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
+- DSI_PORT_WRITE(DISP0_CTRL,
+- VC4_SET_FIELD(dsi->divider,
+- DSI_DISP0_PIX_CLK_DIV) |
+- VC4_SET_FIELD(dsi->format, DSI_DISP0_PFORMAT) |
+- VC4_SET_FIELD(DSI_DISP0_LP_STOP_PERFRAME,
+- DSI_DISP0_LP_STOP_CTRL) |
+- DSI_DISP0_ST_END |
+- DSI_DISP0_ENABLE);
+- } else {
+- DSI_PORT_WRITE(DISP0_CTRL,
+- DSI_DISP0_COMMAND_MODE |
+- DSI_DISP0_ENABLE);
+- }
+-
+ /* Set up DISP1 for transferring long command payloads through
+ * the pixfifo.
+ */
+@@ -1128,6 +1115,25 @@ static void vc4_dsi_encoder_enable(struct drm_encoder *encoder)
+
+ vc4_dsi_ulps(dsi, false);
+
++ drm_bridge_pre_enable(dsi->bridge);
++
++ if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) {
++ DSI_PORT_WRITE(DISP0_CTRL,
++ VC4_SET_FIELD(dsi->divider,
++ DSI_DISP0_PIX_CLK_DIV) |
++ VC4_SET_FIELD(dsi->format, DSI_DISP0_PFORMAT) |
++ VC4_SET_FIELD(DSI_DISP0_LP_STOP_PERFRAME,
++ DSI_DISP0_LP_STOP_CTRL) |
++ DSI_DISP0_ST_END |
++ DSI_DISP0_ENABLE);
++ } else {
++ DSI_PORT_WRITE(DISP0_CTRL,
++ DSI_DISP0_COMMAND_MODE |
++ DSI_DISP0_ENABLE);
++ }
++
++ drm_bridge_enable(dsi->bridge);
++
+ if (debug_dump_regs) {
+ DRM_INFO("DSI regs after:\n");
+ vc4_dsi_dump_regs(dsi);
+@@ -1656,6 +1662,18 @@ static int vc4_dsi_bind(struct device *dev, struct device *master, void *data)
+
+ dev_set_drvdata(dev, dsi);
+
++ ret = drm_bridge_attach(dsi->encoder, dsi->bridge, NULL);
++ if (ret) {
++ dev_err(dev, "bridge attach failed: %d\n", ret);
++ return ret;
++ }
++ /* Disable the atomic helper calls into the bridge. We
++ * manually call the bridge pre_enable / enable / etc. calls
++ * from our driver, since we need to sequence them within the
++ * encoder's enable/disable paths.
++ */
++ dsi->encoder->bridge = NULL;
++
+ pm_runtime_enable(dev);
+
+ return 0;
+--
+2.21.0
+