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Message-ID: <1655399361-10842-3-git-send-email-quic_khsieh@quicinc.com>
Date: Thu, 16 Jun 2022 10:09:21 -0700
From: Kuogee Hsieh <quic_khsieh@...cinc.com>
To: <dri-devel@...ts.freedesktop.org>, <robdclark@...il.com>,
<sean@...rly.run>, <swboyd@...omium.org>, <dianders@...omium.org>,
<vkoul@...nel.org>, <daniel@...ll.ch>, <airlied@...ux.ie>,
<agross@...nel.org>, <dmitry.baryshkov@...aro.org>,
<bjorn.andersson@...aro.org>
CC: Kuogee Hsieh <quic_khsieh@...cinc.com>,
<quic_abhinavk@...cinc.com>, <quic_aravindh@...cinc.com>,
<quic_sbillaka@...cinc.com>, <freedreno@...ts.freedesktop.org>,
<linux-arm-msm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v8 2/2] drm/msm/dp: clean up pixel_rate from dp_ctrl.c
dp_ctrl keep an local cache of pixel_rate which increase confusing
in regrading how pixel_rate being used. This patch refer pixel_rate
directly from dp_panel to eliminate unnecessary pixel_rate variable
from struct dp_ctrl.
Changes in v8:
-- add this patch to remove pixel_rate from dp_ctrl
Signed-off-by: Kuogee Hsieh <quic_khsieh@...cinc.com>
---
drivers/gpu/drm/msm/dp/dp_ctrl.c | 158 +++++++++++++++++++--------------------
drivers/gpu/drm/msm/dp/dp_ctrl.h | 2 -
2 files changed, 79 insertions(+), 81 deletions(-)
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c
index 01028b5..6fddddd 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.c
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c
@@ -1237,8 +1237,6 @@ static int dp_ctrl_link_train_2(struct dp_ctrl_private *ctrl,
return -ETIMEDOUT;
}
-static int dp_ctrl_reinitialize_mainlink(struct dp_ctrl_private *ctrl);
-
static int dp_ctrl_link_train(struct dp_ctrl_private *ctrl,
int *training_step)
{
@@ -1337,7 +1335,8 @@ static void dp_ctrl_set_clock_rate(struct dp_ctrl_private *ctrl,
name, rate);
}
-static int dp_ctrl_enable_mainlink_clocks(struct dp_ctrl_private *ctrl)
+static int dp_ctrl_enable_mainlink_clocks(struct dp_ctrl_private *ctrl,
+ unsigned long pixel_rate)
{
int ret = 0;
struct dp_io *dp_io = &ctrl->parser->io;
@@ -1358,25 +1357,25 @@ static int dp_ctrl_enable_mainlink_clocks(struct dp_ctrl_private *ctrl)
if (ret)
DRM_ERROR("Unable to start link clocks. ret=%d\n", ret);
- drm_dbg_dp(ctrl->drm_dev, "link rate=%d pixel_clk=%d\n",
- ctrl->link->link_params.rate, ctrl->dp_ctrl.pixel_rate);
+ drm_dbg_dp(ctrl->drm_dev, "link rate=%d pixel_clk=%lu\n",
+ ctrl->link->link_params.rate, pixel_rate);
return ret;
}
-static int dp_ctrl_enable_stream_clocks(struct dp_ctrl_private *ctrl)
+static int dp_ctrl_enable_stream_clocks(struct dp_ctrl_private *ctrl,
+ unsigned long pixel_rate)
{
- int ret = 0;
+ int ret;
- dp_ctrl_set_clock_rate(ctrl, DP_STREAM_PM, "stream_pixel",
- ctrl->dp_ctrl.pixel_rate * 1000);
+ dp_ctrl_set_clock_rate(ctrl, DP_STREAM_PM, "stream_pixel", pixel_rate * 1000);
ret = dp_power_clk_enable(ctrl->power, DP_STREAM_PM, true);
if (ret)
DRM_ERROR("Unabled to start pixel clocks. ret=%d\n", ret);
- drm_dbg_dp(ctrl->drm_dev, "link rate=%d pixel_clk=%d\n",
- ctrl->link->link_params.rate, ctrl->dp_ctrl.pixel_rate);
+ drm_dbg_dp(ctrl->drm_dev, "link rate=%d pixel_clk=%lu\n",
+ ctrl->link->link_params.rate, pixel_rate);
return ret;
}
@@ -1441,7 +1440,8 @@ static bool dp_ctrl_use_fixed_nvid(struct dp_ctrl_private *ctrl)
return false;
}
-static int dp_ctrl_reinitialize_mainlink(struct dp_ctrl_private *ctrl)
+static int dp_ctrl_reinitialize_mainlink(struct dp_ctrl_private *ctrl,
+ unsigned long pixel_rate)
{
int ret = 0;
struct dp_io *dp_io = &ctrl->parser->io;
@@ -1465,7 +1465,7 @@ static int dp_ctrl_reinitialize_mainlink(struct dp_ctrl_private *ctrl)
/* hw recommended delay before re-enabling clocks */
msleep(20);
- ret = dp_ctrl_enable_mainlink_clocks(ctrl);
+ ret = dp_ctrl_enable_mainlink_clocks(ctrl, pixel_rate);
if (ret) {
DRM_ERROR("Failed to enable mainlink clks. ret=%d\n", ret);
return ret;
@@ -1513,8 +1513,6 @@ static int dp_ctrl_link_maintenance(struct dp_ctrl_private *ctrl)
ctrl->link->phy_params.p_level = 0;
ctrl->link->phy_params.v_level = 0;
- ctrl->dp_ctrl.pixel_rate = ctrl->panel->dp_mode.drm_mode.clock;
-
ret = dp_ctrl_setup_main_link(ctrl, &training_step);
if (ret)
goto end;
@@ -1528,36 +1526,6 @@ static int dp_ctrl_link_maintenance(struct dp_ctrl_private *ctrl)
return ret;
}
-static int dp_ctrl_process_phy_test_request(struct dp_ctrl_private *ctrl)
-{
- int ret = 0;
-
- if (!ctrl->link->phy_params.phy_test_pattern_sel) {
- drm_dbg_dp(ctrl->drm_dev,
- "no test pattern selected by sink\n");
- return ret;
- }
-
- /*
- * The global reset will need DP link related clocks to be
- * running. Add the global reset just before disabling the
- * link clocks and core clocks.
- */
- ret = dp_ctrl_off(&ctrl->dp_ctrl);
- if (ret) {
- DRM_ERROR("failed to disable DP controller\n");
- return ret;
- }
-
- ret = dp_ctrl_on_link(&ctrl->dp_ctrl);
- if (!ret)
- ret = dp_ctrl_on_stream_phy_test_report(&ctrl->dp_ctrl);
- else
- DRM_ERROR("failed to enable DP link controller\n");
-
- return ret;
-}
-
static bool dp_ctrl_send_phy_test_pattern(struct dp_ctrl_private *ctrl)
{
bool success = false;
@@ -1610,6 +1578,56 @@ static bool dp_ctrl_send_phy_test_pattern(struct dp_ctrl_private *ctrl)
return success;
}
+int dp_ctrl_on_stream_phy_test_report(struct dp_ctrl *dp_ctrl)
+{
+ int ret = 0;
+ struct dp_ctrl_private *ctrl;
+ unsigned long pixel_rate;
+
+ ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
+
+ pixel_rate = ctrl->panel->dp_mode.drm_mode.clock;
+ ret = dp_ctrl_enable_stream_clocks(ctrl, pixel_rate);
+ if (ret) {
+ DRM_ERROR("Failed to start pixel clocks. ret=%d\n", ret);
+ return ret;
+ }
+
+ dp_ctrl_send_phy_test_pattern(ctrl);
+
+ return 0;
+}
+
+static int dp_ctrl_process_phy_test_request(struct dp_ctrl_private *ctrl)
+{
+ int ret = 0;
+
+ if (!ctrl->link->phy_params.phy_test_pattern_sel) {
+ drm_dbg_dp(ctrl->drm_dev,
+ "no test pattern selected by sink\n");
+ return ret;
+ }
+
+ /*
+ * The global reset will need DP link related clocks to be
+ * running. Add the global reset just before disabling the
+ * link clocks and core clocks.
+ */
+ ret = dp_ctrl_off(&ctrl->dp_ctrl);
+ if (ret) {
+ DRM_ERROR("failed to disable DP controller\n");
+ return ret;
+ }
+
+ ret = dp_ctrl_on_link(&ctrl->dp_ctrl);
+ if (!ret)
+ ret = dp_ctrl_on_stream_phy_test_report(&ctrl->dp_ctrl);
+ else
+ DRM_ERROR("failed to enable DP link controller\n");
+
+ return ret;
+}
+
void dp_ctrl_handle_sink_request(struct dp_ctrl *dp_ctrl)
{
struct dp_ctrl_private *ctrl;
@@ -1685,6 +1703,7 @@ int dp_ctrl_on_link(struct dp_ctrl *dp_ctrl)
u32 const phy_cts_pixel_clk_khz = 148500;
u8 link_status[DP_LINK_STATUS_SIZE];
unsigned int training_step;
+ unsigned long pixel_rate;
if (!dp_ctrl)
return -EINVAL;
@@ -1695,29 +1714,30 @@ int dp_ctrl_on_link(struct dp_ctrl *dp_ctrl)
dp_power_clk_enable(ctrl->power, DP_CORE_PM, true);
+ pixel_rate = ctrl->panel->dp_mode.drm_mode.clock;
+
if (ctrl->link->sink_request & DP_TEST_LINK_PHY_TEST_PATTERN) {
drm_dbg_dp(ctrl->drm_dev,
"using phy test link parameters\n");
- if (!ctrl->panel->dp_mode.drm_mode.clock)
- ctrl->dp_ctrl.pixel_rate = phy_cts_pixel_clk_khz;
+ if (!pixel_rate)
+ pixel_rate = phy_cts_pixel_clk_khz;
} else {
ctrl->link->link_params.rate = rate;
ctrl->link->link_params.num_lanes =
ctrl->panel->link_info.num_lanes;
- ctrl->dp_ctrl.pixel_rate = ctrl->panel->dp_mode.drm_mode.clock;
}
- drm_dbg_dp(ctrl->drm_dev, "rate=%d, num_lanes=%d, pixel_rate=%d\n",
+ drm_dbg_dp(ctrl->drm_dev, "rate=%d, num_lanes=%d, pixel_rate=%lu\n",
ctrl->link->link_params.rate, ctrl->link->link_params.num_lanes,
- ctrl->dp_ctrl.pixel_rate);
+ pixel_rate);
- rc = dp_ctrl_enable_mainlink_clocks(ctrl);
+ rc = dp_ctrl_enable_mainlink_clocks(ctrl, pixel_rate);
if (rc)
return rc;
while (--link_train_max_retries) {
- rc = dp_ctrl_reinitialize_mainlink(ctrl);
+ rc = dp_ctrl_reinitialize_mainlink(ctrl, pixel_rate);
if (rc) {
DRM_ERROR("Failed to reinitialize mainlink. rc=%d\n",
rc);
@@ -1807,31 +1827,12 @@ static int dp_ctrl_link_retrain(struct dp_ctrl_private *ctrl)
return dp_ctrl_setup_main_link(ctrl, &training_step);
}
-int dp_ctrl_on_stream_phy_test_report(struct dp_ctrl *dp_ctrl)
-{
- int ret;
- struct dp_ctrl_private *ctrl;
-
- ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
-
- ctrl->dp_ctrl.pixel_rate = ctrl->panel->dp_mode.drm_mode.clock;
-
- ret = dp_ctrl_enable_stream_clocks(ctrl);
- if (ret) {
- DRM_ERROR("Failed to start pixel clocks. ret=%d\n", ret);
- return ret;
- }
-
- dp_ctrl_send_phy_test_pattern(ctrl);
-
- return 0;
-}
-
int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl, bool force_link_train)
{
int ret = 0;
bool mainlink_ready = false;
struct dp_ctrl_private *ctrl;
+ unsigned long pixel_rate;
unsigned long pixel_rate_orig;
if (!dp_ctrl)
@@ -1839,25 +1840,24 @@ int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl, bool force_link_train)
ctrl = container_of(dp_ctrl, struct dp_ctrl_private, dp_ctrl);
- ctrl->dp_ctrl.pixel_rate = ctrl->panel->dp_mode.drm_mode.clock;
+ pixel_rate = pixel_rate_orig = ctrl->panel->dp_mode.drm_mode.clock;
- pixel_rate_orig = ctrl->dp_ctrl.pixel_rate;
if (dp_ctrl->wide_bus_en)
- ctrl->dp_ctrl.pixel_rate >>= 1;
+ pixel_rate >>= 1;
- drm_dbg_dp(ctrl->drm_dev, "rate=%d, num_lanes=%d, pixel_rate=%d\n",
+ drm_dbg_dp(ctrl->drm_dev, "rate=%d, num_lanes=%d, pixel_rate=%lu\n",
ctrl->link->link_params.rate,
- ctrl->link->link_params.num_lanes, ctrl->dp_ctrl.pixel_rate);
+ ctrl->link->link_params.num_lanes, pixel_rate);
if (!dp_power_clk_status(ctrl->power, DP_CTRL_PM)) { /* link clk is off */
- ret = dp_ctrl_enable_mainlink_clocks(ctrl);
+ ret = dp_ctrl_enable_mainlink_clocks(ctrl, pixel_rate);
if (ret) {
DRM_ERROR("Failed to start link clocks. ret=%d\n", ret);
goto end;
}
}
- ret = dp_ctrl_enable_stream_clocks(ctrl);
+ ret = dp_ctrl_enable_stream_clocks(ctrl, pixel_rate);
if (ret) {
DRM_ERROR("Failed to start pixel clocks. ret=%d\n", ret);
goto end;
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h b/drivers/gpu/drm/msm/dp/dp_ctrl.h
index 9a39b00..9f29734 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.h
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h
@@ -16,13 +16,11 @@
struct dp_ctrl {
bool orientation;
atomic_t aborted;
- u32 pixel_rate;
bool wide_bus_en;
};
int dp_ctrl_on_link(struct dp_ctrl *dp_ctrl);
int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl, bool force_link_train);
-int dp_ctrl_on_stream_phy_test_report(struct dp_ctrl *dp_ctrl);
int dp_ctrl_off_link_stream(struct dp_ctrl *dp_ctrl);
int dp_ctrl_off_link(struct dp_ctrl *dp_ctrl);
int dp_ctrl_off(struct dp_ctrl *dp_ctrl);
--
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