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Subject[PATCH v1 2/3] drm/msm/dp: decoupling dp->id out of dp controller_id at scxxxx_dp_cfg table
Date
Current the index (dp->id) of DP descriptor table (scxxxx_dp_cfg[]) are tightly
coupled with DP controller_id. This means DP use controller id 0 must be placed
at first entry of DP descriptor table (scxxxx_dp_cfg[]). Otherwise the internal
INTF will mismatch controller_id. This will cause controller kickoff wrong
interface timing engine and cause dpu_encoder_phys_vid_wait_for_commit_done
vblank timeout error.

This patch add controller_id field into struct msm_dp_desc to break the tightly
coupled relationship between index (dp->id) of DP descriptor table with DP
controller_id.

Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c | 16 ++++++++++------
drivers/gpu/drm/msm/dp/dp_display.c | 30 +++++++++++++++++++++++-------
drivers/gpu/drm/msm/msm_drv.h | 2 ++
3 files changed, 35 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 2b9d931..8feeb89 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -615,7 +615,7 @@ static int _dpu_kms_initialize_displayport(struct drm_device *dev,
struct dpu_kms *dpu_kms)
{
struct drm_encoder *encoder = NULL;
- struct msm_display_info info;
+ struct msm_display_info *info;
int rc;
int i;

@@ -637,11 +637,15 @@ static int _dpu_kms_initialize_displayport(struct drm_device *dev,
return rc;
}

- info.num_of_h_tiles = 1;
- info.h_tile_instance[0] = i;
- info.capabilities = MSM_DISPLAY_CAP_VID_MODE;
- info.intf_type = encoder->encoder_type;
- rc = dpu_encoder_setup(dev, encoder, &info);
+ info = &priv->info[i];
+ info->intf_type = encoder->encoder_type;
+ /*
+ * info->capabilities, info->num_of_h_tiles and
+ * info->h_tile_instance are populated at
+ * dp_display_bind()
+ */
+
+ rc = dpu_encoder_setup(dev, encoder, info);
if (rc) {
DPU_ERROR("failed to setup DPU encoder %d: rc:%d\n",
encoder->base.id, rc);
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index da5c03a..a87a9d8 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -77,6 +77,7 @@ struct dp_display_private {
int irq;

unsigned int id;
+ unsigned int controller_id;

/* state variables */
bool core_initialized;
@@ -123,6 +124,7 @@ struct dp_display_private {
struct msm_dp_desc {
phys_addr_t io_start;
unsigned int connector_type;
+ unsigned int controller_id;
bool wide_bus_en;
};

@@ -133,31 +135,38 @@ struct msm_dp_config {

static const struct msm_dp_config sc7180_dp_cfg = {
.descs = (const struct msm_dp_desc[]) {
- [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
+ { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort,
+ .controller_id = MSM_DP_CONTROLLER_0 },
},
.num_descs = 1,
};

static const struct msm_dp_config sc7280_dp_cfg = {
.descs = (const struct msm_dp_desc[]) {
- [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true },
- [MSM_DP_CONTROLLER_1] = { .io_start = 0x0aea0000, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_en = true },
+ { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort,
+ .controller_id = MSM_DP_CONTROLLER_0, .wide_bus_en = true },
+ { .io_start = 0x0aea0000, .connector_type = DRM_MODE_CONNECTOR_eDP,
+ .controller_id = MSM_DP_CONTROLLER_1, .wide_bus_en = true },
},
.num_descs = 2,
};

static const struct msm_dp_config sc8180x_dp_cfg = {
.descs = (const struct msm_dp_desc[]) {
- [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
- [MSM_DP_CONTROLLER_1] = { .io_start = 0x0ae98000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
- [MSM_DP_CONTROLLER_2] = { .io_start = 0x0ae9a000, .connector_type = DRM_MODE_CONNECTOR_eDP },
+ {.io_start = 0x0ae9a000, .connector_type = DRM_MODE_CONNECTOR_eDP,
+ .controller_id = MSM_DP_CONTROLLER_2 },
+ { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort,
+ .controller_id = MSM_DP_CONTROLLER_0 },
+ { .io_start = 0x0ae98000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort,
+ .controller_id = MSM_DP_CONTROLLER_1 },
},
.num_descs = 3,
};

static const struct msm_dp_config sm8350_dp_cfg = {
.descs = (const struct msm_dp_desc[]) {
- [MSM_DP_CONTROLLER_0] = { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
+ { .io_start = 0x0ae90000, .connector_type = DRM_MODE_CONNECTOR_DisplayPort,
+ .controller_id = MSM_DP_CONTROLLER_0 },
},
.num_descs = 1,
};
@@ -260,10 +269,16 @@ static int dp_display_bind(struct device *dev, struct device *master,
struct dp_display_private *dp = dev_get_dp_display_private(dev);
struct msm_drm_private *priv = dev_get_drvdata(master);
struct drm_device *drm = priv->dev;
+ struct msm_display_info *info;

dp->dp_display.drm_dev = drm;
priv->dp[dp->id] = &dp->dp_display;

+ info = &priv->info[dp->id];
+ info->num_of_h_tiles = 1;
+ info->h_tile_instance[0] = dp->controller_id;
+ info->capabilities = MSM_DISPLAY_CAP_VID_MODE;
+
rc = dp->parser->parse(dp->parser);
if (rc) {
DRM_ERROR("device tree parsing failed\n");
@@ -1308,6 +1323,7 @@ static int dp_display_probe(struct platform_device *pdev)
dp->pdev = pdev;
dp->name = "drm_dp";
dp->dp_display.connector_type = desc->connector_type;
+ dp->controller_id = desc->controller_id;
dp->wide_bus_en = desc->wide_bus_en;
dp->dp_display.is_edp =
(dp->dp_display.connector_type == DRM_MODE_CONNECTOR_eDP);
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index f9c263b..71ab699 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -150,6 +150,8 @@ struct msm_drm_private {

struct msm_dp *dp[MSM_DP_CONTROLLER_COUNT];

+ struct msm_display_info info[MSM_DP_CONTROLLER_COUNT];
+
/* when we have more than one 'msm_gpu' these need to be an array: */
struct msm_gpu *gpu;

--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
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