Commit 491657a9 authored by Eric Anholt's avatar Eric Anholt

drm/vc4: Make DSI call into the bridge after the DSI link is enabled.

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).
Signed-off-by: default avatarEric Anholt <eric@anholt.net>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180621231759.29604-1-eric@anholt.netReviewed-by: default avatarAndrzej Hajda <a.hajda@samsung.com>
parent 14d9deeb
...@@ -814,7 +814,9 @@ static void vc4_dsi_encoder_disable(struct drm_encoder *encoder) ...@@ -814,7 +814,9 @@ static void vc4_dsi_encoder_disable(struct drm_encoder *encoder)
struct vc4_dsi *dsi = vc4_encoder->dsi; struct vc4_dsi *dsi = vc4_encoder->dsi;
struct device *dev = &dsi->pdev->dev; struct device *dev = &dsi->pdev->dev;
drm_bridge_disable(dsi->bridge);
vc4_dsi_ulps(dsi, true); vc4_dsi_ulps(dsi, true);
drm_bridge_post_disable(dsi->bridge);
clk_disable_unprepare(dsi->pll_phy_clock); clk_disable_unprepare(dsi->pll_phy_clock);
clk_disable_unprepare(dsi->escape_clock); clk_disable_unprepare(dsi->escape_clock);
...@@ -1089,21 +1091,6 @@ static void vc4_dsi_encoder_enable(struct drm_encoder *encoder) ...@@ -1089,21 +1091,6 @@ static void vc4_dsi_encoder_enable(struct drm_encoder *encoder)
/* Display reset sequence timeout */ /* Display reset sequence timeout */
DSI_PORT_WRITE(PR_TO_CNT, 100000); 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 /* Set up DISP1 for transferring long command payloads through
* the pixfifo. * the pixfifo.
*/ */
...@@ -1128,6 +1115,25 @@ static void vc4_dsi_encoder_enable(struct drm_encoder *encoder) ...@@ -1128,6 +1115,25 @@ static void vc4_dsi_encoder_enable(struct drm_encoder *encoder)
vc4_dsi_ulps(dsi, false); 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) { if (debug_dump_regs) {
DRM_INFO("DSI regs after:\n"); DRM_INFO("DSI regs after:\n");
vc4_dsi_dump_regs(dsi); vc4_dsi_dump_regs(dsi);
...@@ -1639,6 +1645,12 @@ static int vc4_dsi_bind(struct device *dev, struct device *master, void *data) ...@@ -1639,6 +1645,12 @@ static int vc4_dsi_bind(struct device *dev, struct device *master, void *data)
dev_err(dev, "bridge attach failed: %d\n", ret); dev_err(dev, "bridge attach failed: %d\n", ret);
return 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); pm_runtime_enable(dev);
......
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