[PATCH v2 0/6] drm/msm/dp: Spring cleaning

[PATCH v2 0/6] drm/msm/dp: Spring cleaning

[Bjorn Andersson]

Spring is in the air, clean out some dust that has accumulated in the
Qualcomm DP driver.

Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
---
Changes in v2:
- Merge dp_debug_get() and dp_debug_init()
- Link to v1: https://lore.kernel.org/r/20240326-msm-dp-cleanup-v1-0-e775556ecec0@quicinc.com

---
Bjorn Andersson (6):
      drm/msm/dp: Drop unused dp_debug struct
      drm/msm/dp: Removed fixed nvid "support"
      drm/msm/dp: Remove unused defines and members
      drm/msm/dp: Use function arguments for aux writes
      drm/msm/dp: Use function arguments for timing configuration
      drm/msm/dp: Use function arguments for audio operations

 drivers/gpu/drm/msm/dp/dp_audio.c   | 25 +++------------
 drivers/gpu/drm/msm/dp/dp_aux.c     |  9 ++----
 drivers/gpu/drm/msm/dp/dp_catalog.c | 64 ++++++++++++++-----------------------
 drivers/gpu/drm/msm/dp/dp_catalog.h | 49 +++++++++-------------------
 drivers/gpu/drm/msm/dp/dp_ctrl.c    | 17 +---------
 drivers/gpu/drm/msm/dp/dp_ctrl.h    |  1 -
 drivers/gpu/drm/msm/dp/dp_debug.c   | 59 +++++++++++-----------------------
 drivers/gpu/drm/msm/dp/dp_debug.h   | 38 +++++++---------------
 drivers/gpu/drm/msm/dp/dp_display.c | 15 ++-------
 drivers/gpu/drm/msm/dp/dp_display.h |  3 --
 drivers/gpu/drm/msm/dp/dp_drm.c     |  2 --
 drivers/gpu/drm/msm/dp/dp_link.c    |  4 ---
 drivers/gpu/drm/msm/dp/dp_link.h    |  1 -
 drivers/gpu/drm/msm/dp/dp_panel.c   | 14 +++++---
 drivers/gpu/drm/msm/dp/dp_panel.h   |  3 --
 15 files changed, 88 insertions(+), 216 deletions(-)
---
base-commit: 084c8e315db34b59d38d06e684b1a0dd07d30287
change-id: 20240323-msm-dp-cleanup-f8ba32f62fb9

Best regards,
-- 
Bjorn Andersson <quic_bjorande@quicinc.com>

[PATCH v2 1/6] drm/msm/dp: Drop unused dp_debug struct

[Bjorn Andersson]

From: Bjorn Andersson <quic_bjorande@quicinc.com>

The members of struct dp_debug are no longer used, so the only purpose
of this struct is as a type of the return value of dp_debug_get(), to
signal success/error.

Drop the struct in favor of signalling the result of initialization
using an int, then merge dp_debug_get() with dp_debug_init() to avoid
the unnecessar boilerplate code.

Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
---
 drivers/gpu/drm/msm/dp/dp_debug.c   | 59 +++++++++++--------------------------
 drivers/gpu/drm/msm/dp/dp_debug.h   | 38 +++++++-----------------
 drivers/gpu/drm/msm/dp/dp_display.c | 10 ++-----
 3 files changed, 31 insertions(+), 76 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_debug.c b/drivers/gpu/drm/msm/dp/dp_debug.c
index eca5a02f9003..b8611f6d2296 100644
--- a/drivers/gpu/drm/msm/dp/dp_debug.c
+++ b/drivers/gpu/drm/msm/dp/dp_debug.c
@@ -21,8 +21,6 @@ struct dp_debug_private {
 	struct dp_link *link;
 	struct dp_panel *panel;
 	struct drm_connector *connector;
-
-	struct dp_debug dp_debug;
 };
 
 static int dp_debug_show(struct seq_file *seq, void *p)
@@ -199,10 +197,24 @@ static const struct file_operations test_active_fops = {
 	.write = dp_test_active_write
 };
 
-static void dp_debug_init(struct dp_debug *dp_debug, struct dentry *root, bool is_edp)
+int dp_debug_init(struct device *dev, struct dp_panel *panel,
+		  struct dp_link *link,
+		  struct drm_connector *connector,
+		  struct dentry *root, bool is_edp)
 {
-	struct dp_debug_private *debug = container_of(dp_debug,
-			struct dp_debug_private, dp_debug);
+	struct dp_debug_private *debug;
+
+	if (!dev || !panel || !link) {
+		DRM_ERROR("invalid input\n");
+		return -EINVAL;
+	}
+
+	debug = devm_kzalloc(dev, sizeof(*debug), GFP_KERNEL);
+	if (!debug)
+		return -ENOMEM;
+
+	debug->link = link;
+	debug->panel = panel;
 
 	debugfs_create_file("dp_debug", 0444, root,
 			debug, &dp_debug_fops);
@@ -220,41 +232,6 @@ static void dp_debug_init(struct dp_debug *dp_debug, struct dentry *root, bool i
 				    root,
 				    debug, &dp_test_type_fops);
 	}
-}
 
-struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
-		struct dp_link *link,
-		struct drm_connector *connector,
-		struct dentry *root, bool is_edp)
-{
-	struct dp_debug_private *debug;
-	struct dp_debug *dp_debug;
-	int rc;
-
-	if (!dev || !panel || !link) {
-		DRM_ERROR("invalid input\n");
-		rc = -EINVAL;
-		goto error;
-	}
-
-	debug = devm_kzalloc(dev, sizeof(*debug), GFP_KERNEL);
-	if (!debug) {
-		rc = -ENOMEM;
-		goto error;
-	}
-
-	debug->dp_debug.debug_en = false;
-	debug->link = link;
-	debug->panel = panel;
-
-	dp_debug = &debug->dp_debug;
-	dp_debug->vdisplay = 0;
-	dp_debug->hdisplay = 0;
-	dp_debug->vrefresh = 0;
-
-	dp_debug_init(dp_debug, root, is_edp);
-
-	return dp_debug;
- error:
-	return ERR_PTR(rc);
+	return 0;
 }
diff --git a/drivers/gpu/drm/msm/dp/dp_debug.h b/drivers/gpu/drm/msm/dp/dp_debug.h
index 9b3b2e702f65..7e1aa892fc09 100644
--- a/drivers/gpu/drm/msm/dp/dp_debug.h
+++ b/drivers/gpu/drm/msm/dp/dp_debug.h
@@ -9,22 +9,6 @@
 #include "dp_panel.h"
 #include "dp_link.h"
 
-/**
- * struct dp_debug
- * @debug_en: specifies whether debug mode enabled
- * @vdisplay: used to filter out vdisplay value
- * @hdisplay: used to filter out hdisplay value
- * @vrefresh: used to filter out vrefresh value
- * @tpg_state: specifies whether tpg feature is enabled
- */
-struct dp_debug {
-	bool debug_en;
-	int aspect_ratio;
-	int vdisplay;
-	int hdisplay;
-	int vrefresh;
-};
-
 #if defined(CONFIG_DEBUG_FS)
 
 /**
@@ -41,22 +25,22 @@ struct dp_debug {
  * This function sets up the debug module and provides a way
  * for debugfs input to be communicated with existing modules
  */
-struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
-		struct dp_link *link,
-		struct drm_connector *connector,
-		struct dentry *root,
-		bool is_edp);
+int dp_debug_init(struct device *dev, struct dp_panel *panel,
+		  struct dp_link *link,
+		  struct drm_connector *connector,
+		  struct dentry *root,
+		  bool is_edp);
 
 #else
 
 static inline
-struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
-		struct dp_link *link,
-		struct drm_connector *connector,
-		struct dentry *root,
-		bool is_edp)
+int dp_debug_init(struct device *dev, struct dp_panel *panel,
+		  struct dp_link *link,
+		  struct drm_connector *connector,
+		  struct dentry *root,
+		  bool is_edp)
 {
-	return ERR_PTR(-EINVAL);
+	return -EINVAL;
 }
 
 #endif /* defined(CONFIG_DEBUG_FS) */
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index c4cb82af5c2f..ba658c1637d1 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -93,7 +93,6 @@ struct dp_display_private {
 	struct dp_link    *link;
 	struct dp_panel   *panel;
 	struct dp_ctrl    *ctrl;
-	struct dp_debug   *debug;
 
 	struct dp_display_mode dp_mode;
 	struct msm_dp dp_display;
@@ -1431,14 +1430,9 @@ void dp_display_debugfs_init(struct msm_dp *dp_display, struct dentry *root, boo
 	dp = container_of(dp_display, struct dp_display_private, dp_display);
 	dev = &dp->dp_display.pdev->dev;
 
-	dp->debug = dp_debug_get(dev, dp->panel,
-					dp->link, dp->dp_display.connector,
-					root, is_edp);
-	if (IS_ERR(dp->debug)) {
-		rc = PTR_ERR(dp->debug);
+	rc = dp_debug_init(dev, dp->panel, dp->link, dp->dp_display.connector, root, is_edp);
+	if (rc)
 		DRM_ERROR("failed to initialize debug, rc = %d\n", rc);
-		dp->debug = NULL;
-	}
 }
 
 int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,

-- 
2.43.0

[PATCH v2 2/6] drm/msm/dp: Removed fixed nvid "support"

[Bjorn Andersson]

From: Bjorn Andersson <quic_bjorande@quicinc.com>

The "desc" member of struct dp_panel is zero-initialized during
allocation and never assigned, resulting in dp_ctrl_use_fixed_nvid()
never returning true. This returned boolean value is passed around but
never acted upon.

Perform constant propagation and remove the traces of "fixed nvid".

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
---
 drivers/gpu/drm/msm/dp/dp_catalog.c |  2 +-
 drivers/gpu/drm/msm/dp/dp_catalog.h |  2 +-
 drivers/gpu/drm/msm/dp/dp_ctrl.c    | 17 +----------------
 drivers/gpu/drm/msm/dp/dp_panel.h   |  1 -
 4 files changed, 3 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c
index 3e7c84cdef47..8c72d532d96b 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.c
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.c
@@ -469,7 +469,7 @@ void dp_catalog_setup_peripheral_flush(struct dp_catalog *dp_catalog)
 
 void dp_catalog_ctrl_config_msa(struct dp_catalog *dp_catalog,
 					u32 rate, u32 stream_rate_khz,
-					bool fixed_nvid, bool is_ycbcr_420)
+					bool is_ycbcr_420)
 {
 	u32 pixel_m, pixel_n;
 	u32 mvid, nvid, pixel_div = 0, dispcc_input_rate;
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h
index 75ec290127c7..b85ad6bdb2e7 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.h
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.h
@@ -99,7 +99,7 @@ void dp_catalog_ctrl_psr_mainlink_enable(struct dp_catalog *dp_catalog, bool ena
 void dp_catalog_setup_peripheral_flush(struct dp_catalog *dp_catalog);
 void dp_catalog_ctrl_config_misc(struct dp_catalog *dp_catalog, u32 cc, u32 tb);
 void dp_catalog_ctrl_config_msa(struct dp_catalog *dp_catalog, u32 rate,
-				u32 stream_rate_khz, bool fixed_nvid, bool is_ycbcr_420);
+				u32 stream_rate_khz, bool is_ycbcr_420);
 int dp_catalog_ctrl_set_pattern_state_bit(struct dp_catalog *dp_catalog, u32 pattern);
 u32 dp_catalog_hw_revision(const struct dp_catalog *dp_catalog);
 void dp_catalog_ctrl_reset(struct dp_catalog *dp_catalog);
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c
index c4dda1faef67..e65a460fb52d 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.c
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c
@@ -1566,21 +1566,6 @@ void dp_ctrl_phy_exit(struct dp_ctrl *dp_ctrl)
 			phy, phy->init_count, phy->power_count);
 }
 
-static bool dp_ctrl_use_fixed_nvid(struct dp_ctrl_private *ctrl)
-{
-	const u8 *dpcd = ctrl->panel->dpcd;
-
-	/*
-	 * For better interop experience, used a fixed NVID=0x8000
-	 * whenever connected to a VGA dongle downstream.
-	 */
-	if (drm_dp_is_branch(dpcd))
-		return (drm_dp_has_quirk(&ctrl->panel->desc,
-					 DP_DPCD_QUIRK_CONSTANT_N));
-
-	return false;
-}
-
 static int dp_ctrl_reinitialize_mainlink(struct dp_ctrl_private *ctrl)
 {
 	struct phy *phy = ctrl->phy;
@@ -2022,7 +2007,7 @@ int dp_ctrl_on_stream(struct dp_ctrl *dp_ctrl, bool force_link_train)
 
 	dp_catalog_ctrl_config_msa(ctrl->catalog,
 		ctrl->link->link_params.rate,
-		pixel_rate_orig, dp_ctrl_use_fixed_nvid(ctrl),
+		pixel_rate_orig,
 		ctrl->panel->dp_mode.out_fmt_is_yuv_420);
 
 	dp_ctrl_setup_tr_unit(ctrl);
diff --git a/drivers/gpu/drm/msm/dp/dp_panel.h b/drivers/gpu/drm/msm/dp/dp_panel.h
index e843f5062d1f..9afd99e00b0c 100644
--- a/drivers/gpu/drm/msm/dp/dp_panel.h
+++ b/drivers/gpu/drm/msm/dp/dp_panel.h
@@ -40,7 +40,6 @@ struct dp_panel {
 	u8 downstream_ports[DP_MAX_DOWNSTREAM_PORTS];
 
 	struct dp_link_info link_info;
-	struct drm_dp_desc desc;
 	struct edid *edid;
 	struct drm_connector *connector;
 	struct dp_display_mode dp_mode;

-- 
2.43.0

[PATCH v2 3/6] drm/msm/dp: Remove unused defines and members

[Bjorn Andersson]

From: Bjorn Andersson <quic_bjorande@quicinc.com>

Throughout the Qualcomm Displayport driver a number of defines and
struct members has become unused, but lingers in the code. Remove these.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
---
 drivers/gpu/drm/msm/dp/dp_audio.c   |  5 -----
 drivers/gpu/drm/msm/dp/dp_catalog.c |  1 -
 drivers/gpu/drm/msm/dp/dp_catalog.h | 17 -----------------
 drivers/gpu/drm/msm/dp/dp_ctrl.h    |  1 -
 drivers/gpu/drm/msm/dp/dp_display.c |  5 -----
 drivers/gpu/drm/msm/dp/dp_display.h |  3 ---
 drivers/gpu/drm/msm/dp/dp_drm.c     |  2 --
 drivers/gpu/drm/msm/dp/dp_link.c    |  4 ----
 drivers/gpu/drm/msm/dp/dp_link.h    |  1 -
 drivers/gpu/drm/msm/dp/dp_panel.h   |  2 --
 10 files changed, 41 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_audio.c b/drivers/gpu/drm/msm/dp/dp_audio.c
index 7634e4b74208..7fd0c1793ba3 100644
--- a/drivers/gpu/drm/msm/dp/dp_audio.c
+++ b/drivers/gpu/drm/msm/dp/dp_audio.c
@@ -22,9 +22,7 @@ struct dp_audio_private {
 	struct platform_device *pdev;
 	struct drm_device *drm_dev;
 	struct dp_catalog *catalog;
-	struct dp_panel *panel;
 
-	bool engine_on;
 	u32 channels;
 
 	struct dp_audio dp_audio;
@@ -356,8 +354,6 @@ static void dp_audio_enable(struct dp_audio_private *audio, bool enable)
 
 	catalog->audio_data = enable;
 	dp_catalog_audio_enable(catalog);
-
-	audio->engine_on = enable;
 }
 
 static struct dp_audio_private *dp_audio_get_data(struct platform_device *pdev)
@@ -571,7 +567,6 @@ struct dp_audio *dp_audio_get(struct platform_device *pdev,
 	}
 
 	audio->pdev = pdev;
-	audio->panel = panel;
 	audio->catalog = catalog;
 
 	dp_audio = &audio->dp_audio;
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c
index 8c72d532d96b..55114a6aba7e 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.c
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.c
@@ -81,7 +81,6 @@ struct dp_catalog_private {
 	struct dss_io_data io;
 	u32 (*audio_map)[DP_AUDIO_SDP_HEADER_MAX];
 	struct dp_catalog dp_catalog;
-	u8 aux_lut_cfg_index[PHY_AUX_CFG_MAX];
 };
 
 void dp_catalog_snapshot(struct dp_catalog *dp_catalog, struct msm_disp_state *disp_state)
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h
index b85ad6bdb2e7..2c2dbeee7634 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.h
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.h
@@ -28,26 +28,9 @@
 #define DP_INTR_FRAME_END		BIT(6)
 #define DP_INTR_CRC_UPDATED		BIT(9)
 
-#define DP_AUX_CFG_MAX_VALUE_CNT 3
-
 #define DP_HW_VERSION_1_0	0x10000000
 #define DP_HW_VERSION_1_2	0x10020000
 
-/* PHY AUX config registers */
-enum dp_phy_aux_config_type {
-	PHY_AUX_CFG0,
-	PHY_AUX_CFG1,
-	PHY_AUX_CFG2,
-	PHY_AUX_CFG3,
-	PHY_AUX_CFG4,
-	PHY_AUX_CFG5,
-	PHY_AUX_CFG6,
-	PHY_AUX_CFG7,
-	PHY_AUX_CFG8,
-	PHY_AUX_CFG9,
-	PHY_AUX_CFG_MAX,
-};
-
 enum dp_catalog_audio_sdp_type {
 	DP_AUDIO_SDP_STREAM,
 	DP_AUDIO_SDP_TIMESTAMP,
diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.h b/drivers/gpu/drm/msm/dp/dp_ctrl.h
index fa014cee7e21..ffcbd9a25748 100644
--- a/drivers/gpu/drm/msm/dp/dp_ctrl.h
+++ b/drivers/gpu/drm/msm/dp/dp_ctrl.h
@@ -12,7 +12,6 @@
 #include "dp_catalog.h"
 
 struct dp_ctrl {
-	atomic_t aborted;
 	bool wide_bus_en;
 };
 
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index ba658c1637d1..6f6ff13844cf 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -74,7 +74,6 @@ struct dp_event {
 };
 
 struct dp_display_private {
-	char *name;
 	int irq;
 
 	unsigned int id;
@@ -82,11 +81,9 @@ struct dp_display_private {
 	/* state variables */
 	bool core_initialized;
 	bool phy_initialized;
-	bool hpd_irq_on;
 	bool audio_supported;
 
 	struct drm_device *drm_dev;
-	struct dentry *root;
 
 	struct dp_catalog *catalog;
 	struct drm_dp_aux *aux;
@@ -800,7 +797,6 @@ static int dp_display_set_mode(struct msm_dp *dp_display,
 
 	drm_mode_copy(&dp->panel->dp_mode.drm_mode, &mode->drm_mode);
 	dp->panel->dp_mode.bpp = mode->bpp;
-	dp->panel->dp_mode.capabilities = mode->capabilities;
 	dp->panel->dp_mode.out_fmt_is_yuv_420 = mode->out_fmt_is_yuv_420;
 	dp_panel_init_panel_info(dp->panel);
 	return 0;
@@ -1260,7 +1256,6 @@ static int dp_display_probe(struct platform_device *pdev)
 		return -EINVAL;
 
 	dp->dp_display.pdev = pdev;
-	dp->name = "drm_dp";
 	dp->id = desc->id;
 	dp->dp_display.connector_type = desc->connector_type;
 	dp->wide_bus_supported = desc->wide_bus_supported;
diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
index 234dada88687..ec7fa67e0569 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.h
+++ b/drivers/gpu/drm/msm/dp/dp_display.h
@@ -16,7 +16,6 @@ struct msm_dp {
 	struct drm_device *drm_dev;
 	struct platform_device *pdev;
 	struct device *codec_dev;
-	struct drm_bridge *bridge;
 	struct drm_connector *connector;
 	struct drm_bridge *next_bridge;
 	bool link_ready;
@@ -28,8 +27,6 @@ struct msm_dp {
 
 	hdmi_codec_plugged_cb plugged_cb;
 
-	bool wide_bus_en;
-
 	struct dp_audio *dp_audio;
 	bool psr_supported;
 };
diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c
index a819a4ff76a9..1b9be5bd97f1 100644
--- a/drivers/gpu/drm/msm/dp/dp_drm.c
+++ b/drivers/gpu/drm/msm/dp/dp_drm.c
@@ -347,8 +347,6 @@ int dp_bridge_init(struct msm_dp *dp_display, struct drm_device *dev,
 		}
 	}
 
-	dp_display->bridge = bridge;
-
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/msm/dp/dp_link.c b/drivers/gpu/drm/msm/dp/dp_link.c
index 49dfac1fd1ef..b94da000014a 100644
--- a/drivers/gpu/drm/msm/dp/dp_link.c
+++ b/drivers/gpu/drm/msm/dp/dp_link.c
@@ -36,7 +36,6 @@ struct dp_link_request {
 
 struct dp_link_private {
 	u32 prev_sink_count;
-	struct device *dev;
 	struct drm_device *drm_dev;
 	struct drm_dp_aux *aux;
 	struct dp_link dp_link;
@@ -804,8 +803,6 @@ int dp_link_psm_config(struct dp_link *dp_link,
 	if (ret)
 		DRM_ERROR("Failed to %s low power mode\n", enable ?
 							"enter" : "exit");
-	else
-		dp_link->psm_enabled = enable;
 
 	mutex_unlock(&link->psm_mutex);
 	return ret;
@@ -1226,7 +1223,6 @@ struct dp_link *dp_link_get(struct device *dev, struct drm_dp_aux *aux)
 	if (!link)
 		return ERR_PTR(-ENOMEM);
 
-	link->dev   = dev;
 	link->aux   = aux;
 
 	mutex_init(&link->psm_mutex);
diff --git a/drivers/gpu/drm/msm/dp/dp_link.h b/drivers/gpu/drm/msm/dp/dp_link.h
index 83da170bc56b..f04407fe7375 100644
--- a/drivers/gpu/drm/msm/dp/dp_link.h
+++ b/drivers/gpu/drm/msm/dp/dp_link.h
@@ -74,7 +74,6 @@ struct dp_link_phy_params {
 struct dp_link {
 	u32 sink_request;
 	u32 test_response;
-	bool psm_enabled;
 
 	u8 sink_count;
 	struct dp_link_test_video test_video;
diff --git a/drivers/gpu/drm/msm/dp/dp_panel.h b/drivers/gpu/drm/msm/dp/dp_panel.h
index 9afd99e00b0c..4ea42fa936ae 100644
--- a/drivers/gpu/drm/msm/dp/dp_panel.h
+++ b/drivers/gpu/drm/msm/dp/dp_panel.h
@@ -15,7 +15,6 @@ struct edid;
 
 struct dp_display_mode {
 	struct drm_display_mode drm_mode;
-	u32 capabilities;
 	u32 bpp;
 	u32 h_active_low;
 	u32 v_active_low;
@@ -47,7 +46,6 @@ struct dp_panel {
 	bool video_test;
 	bool vsc_sdp_supported;
 
-	u32 vic;
 	u32 max_dp_lanes;
 	u32 max_dp_link_rate;
 

-- 
2.43.0

[PATCH v2 4/6] drm/msm/dp: Use function arguments for aux writes

[Bjorn Andersson]

From: Bjorn Andersson <quic_bjorande@quicinc.com>

The dp_aux write operations takes the data to be operated on through a
member of struct dp_catalog, rather than as an argument to the function.

No state is maintained other than across the calling of the functions,
so replace this member with a function argument.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
---
 drivers/gpu/drm/msm/dp/dp_aux.c     | 9 +++------
 drivers/gpu/drm/msm/dp/dp_catalog.c | 8 ++++----
 drivers/gpu/drm/msm/dp/dp_catalog.h | 5 ++---
 3 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_aux.c b/drivers/gpu/drm/msm/dp/dp_aux.c
index adbd5a367395..2c8bcc60692a 100644
--- a/drivers/gpu/drm/msm/dp/dp_aux.c
+++ b/drivers/gpu/drm/msm/dp/dp_aux.c
@@ -87,8 +87,7 @@ static ssize_t dp_aux_write(struct dp_aux_private *aux,
 		/* index = 0, write */
 		if (i == 0)
 			reg |= DP_AUX_DATA_INDEX_WRITE;
-		aux->catalog->aux_data = reg;
-		dp_catalog_aux_write_data(aux->catalog);
+		dp_catalog_aux_write_data(aux->catalog, reg);
 	}
 
 	dp_catalog_aux_clear_trans(aux->catalog, false);
@@ -106,8 +105,7 @@ static ssize_t dp_aux_write(struct dp_aux_private *aux,
 	}
 
 	reg |= DP_AUX_TRANS_CTRL_GO;
-	aux->catalog->aux_data = reg;
-	dp_catalog_aux_write_trans(aux->catalog);
+	dp_catalog_aux_write_trans(aux->catalog, reg);
 
 	return len;
 }
@@ -145,8 +143,7 @@ static ssize_t dp_aux_cmd_fifo_rx(struct dp_aux_private *aux,
 	data = DP_AUX_DATA_INDEX_WRITE; /* INDEX_WRITE */
 	data |= DP_AUX_DATA_READ;  /* read */
 
-	aux->catalog->aux_data = data;
-	dp_catalog_aux_write_data(aux->catalog);
+	dp_catalog_aux_write_data(aux->catalog, data);
 
 	dp = msg->buffer;
 
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c
index 55114a6aba7e..295bd4cb72cc 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.c
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.c
@@ -169,21 +169,21 @@ u32 dp_catalog_aux_read_data(struct dp_catalog *dp_catalog)
 	return dp_read_aux(catalog, REG_DP_AUX_DATA);
 }
 
-int dp_catalog_aux_write_data(struct dp_catalog *dp_catalog)
+int dp_catalog_aux_write_data(struct dp_catalog *dp_catalog, u32 data)
 {
 	struct dp_catalog_private *catalog = container_of(dp_catalog,
 				struct dp_catalog_private, dp_catalog);
 
-	dp_write_aux(catalog, REG_DP_AUX_DATA, dp_catalog->aux_data);
+	dp_write_aux(catalog, REG_DP_AUX_DATA, data);
 	return 0;
 }
 
-int dp_catalog_aux_write_trans(struct dp_catalog *dp_catalog)
+int dp_catalog_aux_write_trans(struct dp_catalog *dp_catalog, u32 data)
 {
 	struct dp_catalog_private *catalog = container_of(dp_catalog,
 				struct dp_catalog_private, dp_catalog);
 
-	dp_write_aux(catalog, REG_DP_AUX_TRANS_CTRL, dp_catalog->aux_data);
+	dp_write_aux(catalog, REG_DP_AUX_TRANS_CTRL, data);
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h
index 2c2dbeee7634..290ef8180c12 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.h
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.h
@@ -48,7 +48,6 @@ enum dp_catalog_audio_header_type {
 };
 
 struct dp_catalog {
-	u32 aux_data;
 	u32 total;
 	u32 sync_start;
 	u32 width_blanking;
@@ -64,8 +63,8 @@ void dp_catalog_snapshot(struct dp_catalog *dp_catalog, struct msm_disp_state *d
 
 /* AUX APIs */
 u32 dp_catalog_aux_read_data(struct dp_catalog *dp_catalog);
-int dp_catalog_aux_write_data(struct dp_catalog *dp_catalog);
-int dp_catalog_aux_write_trans(struct dp_catalog *dp_catalog);
+int dp_catalog_aux_write_data(struct dp_catalog *dp_catalog, u32 data);
+int dp_catalog_aux_write_trans(struct dp_catalog *dp_catalog, u32 data);
 int dp_catalog_aux_clear_trans(struct dp_catalog *dp_catalog, bool read);
 int dp_catalog_aux_clear_hw_interrupts(struct dp_catalog *dp_catalog);
 void dp_catalog_aux_reset(struct dp_catalog *dp_catalog);

-- 
2.43.0

[PATCH v2 5/6] drm/msm/dp: Use function arguments for timing configuration

[Bjorn Andersson]

From: Bjorn Andersson <quic_bjorande@quicinc.com>

dp_catalog_panel_timing_cfg() takes 4 arguments, which are passed from
the calling function through members of struct dp_catalog.

No state is maintained other than across this call, so switch to
function arguments to clean up the code.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
---
 drivers/gpu/drm/msm/dp/dp_catalog.c | 14 ++++++--------
 drivers/gpu/drm/msm/dp/dp_catalog.h |  7 ++-----
 drivers/gpu/drm/msm/dp/dp_panel.c   | 14 +++++++++-----
 3 files changed, 17 insertions(+), 18 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c
index 295bd4cb72cc..00ad3ebaa5a1 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.c
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.c
@@ -880,19 +880,17 @@ u32 dp_catalog_ctrl_read_phy_pattern(struct dp_catalog *dp_catalog)
 }
 
 /* panel related catalog functions */
-int dp_catalog_panel_timing_cfg(struct dp_catalog *dp_catalog)
+int dp_catalog_panel_timing_cfg(struct dp_catalog *dp_catalog, u32 total,
+				u32 sync_start, u32 width_blanking, u32 dp_active)
 {
 	struct dp_catalog_private *catalog = container_of(dp_catalog,
 				struct dp_catalog_private, dp_catalog);
 	u32 reg;
 
-	dp_write_link(catalog, REG_DP_TOTAL_HOR_VER,
-				dp_catalog->total);
-	dp_write_link(catalog, REG_DP_START_HOR_VER_FROM_SYNC,
-				dp_catalog->sync_start);
-	dp_write_link(catalog, REG_DP_HSYNC_VSYNC_WIDTH_POLARITY,
-				dp_catalog->width_blanking);
-	dp_write_link(catalog, REG_DP_ACTIVE_HOR_VER, dp_catalog->dp_active);
+	dp_write_link(catalog, REG_DP_TOTAL_HOR_VER, total);
+	dp_write_link(catalog, REG_DP_START_HOR_VER_FROM_SYNC, sync_start);
+	dp_write_link(catalog, REG_DP_HSYNC_VSYNC_WIDTH_POLARITY, width_blanking);
+	dp_write_link(catalog, REG_DP_ACTIVE_HOR_VER, dp_active);
 
 	reg = dp_read_p0(catalog, MMSS_DP_INTF_CONFIG);
 
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h
index 290ef8180c12..a82ab4856b50 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.h
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.h
@@ -48,10 +48,6 @@ enum dp_catalog_audio_header_type {
 };
 
 struct dp_catalog {
-	u32 total;
-	u32 sync_start;
-	u32 width_blanking;
-	u32 dp_active;
 	enum dp_catalog_audio_sdp_type sdp_type;
 	enum dp_catalog_audio_header_type sdp_header;
 	u32 audio_data;
@@ -106,7 +102,8 @@ void dp_catalog_ctrl_send_phy_pattern(struct dp_catalog *dp_catalog,
 u32 dp_catalog_ctrl_read_phy_pattern(struct dp_catalog *dp_catalog);
 
 /* DP Panel APIs */
-int dp_catalog_panel_timing_cfg(struct dp_catalog *dp_catalog);
+int dp_catalog_panel_timing_cfg(struct dp_catalog *dp_catalog, u32 total,
+				u32 sync_start, u32 width_blanking, u32 dp_active);
 void dp_catalog_panel_enable_vsc_sdp(struct dp_catalog *dp_catalog, struct dp_sdp *vsc_sdp);
 void dp_catalog_panel_disable_vsc_sdp(struct dp_catalog *dp_catalog);
 void dp_catalog_dump_regs(struct dp_catalog *dp_catalog);
diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c
index 8e7069453952..07db8f37cd06 100644
--- a/drivers/gpu/drm/msm/dp/dp_panel.c
+++ b/drivers/gpu/drm/msm/dp/dp_panel.c
@@ -353,6 +353,10 @@ int dp_panel_timing_cfg(struct dp_panel *dp_panel)
 	struct dp_catalog *catalog;
 	struct dp_panel_private *panel;
 	struct drm_display_mode *drm_mode;
+	u32 width_blanking;
+	u32 sync_start;
+	u32 dp_active;
+	u32 total;
 
 	panel = container_of(dp_panel, struct dp_panel_private, dp_panel);
 	catalog = panel->catalog;
@@ -376,13 +380,13 @@ int dp_panel_timing_cfg(struct dp_panel *dp_panel)
 	data <<= 16;
 	data |= total_hor;
 
-	catalog->total = data;
+	total = data;
 
 	data = (drm_mode->vtotal - drm_mode->vsync_start);
 	data <<= 16;
 	data |= (drm_mode->htotal - drm_mode->hsync_start);
 
-	catalog->sync_start = data;
+	sync_start = data;
 
 	data = drm_mode->vsync_end - drm_mode->vsync_start;
 	data <<= 16;
@@ -390,15 +394,15 @@ int dp_panel_timing_cfg(struct dp_panel *dp_panel)
 	data |= drm_mode->hsync_end - drm_mode->hsync_start;
 	data |= (panel->dp_panel.dp_mode.h_active_low << 15);
 
-	catalog->width_blanking = data;
+	width_blanking = data;
 
 	data = drm_mode->vdisplay;
 	data <<= 16;
 	data |= drm_mode->hdisplay;
 
-	catalog->dp_active = data;
+	dp_active = data;
 
-	dp_catalog_panel_timing_cfg(catalog);
+	dp_catalog_panel_timing_cfg(catalog, total, sync_start, width_blanking, dp_active);
 
 	if (dp_panel->dp_mode.out_fmt_is_yuv_420)
 		dp_panel_setup_vsc_sdp_yuv_420(dp_panel);

-- 
2.43.0

[PATCH v2 6/6] drm/msm/dp: Use function arguments for audio operations

[Bjorn Andersson]

From: Bjorn Andersson <quic_bjorande@quicinc.com>

The dp_audio read and write operations uses members in struct dp_catalog
for passing arguments and return values. This adds unnecessary
complexity to the implementation, as it turns out after detangling the
logic that no state is actually held in these variables.

Clean this up by using function arguments and return values for passing
the data.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
---
 drivers/gpu/drm/msm/dp/dp_audio.c   | 20 +++++--------------
 drivers/gpu/drm/msm/dp/dp_catalog.c | 39 +++++++++++++------------------------
 drivers/gpu/drm/msm/dp/dp_catalog.h | 18 +++++++++--------
 3 files changed, 28 insertions(+), 49 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_audio.c b/drivers/gpu/drm/msm/dp/dp_audio.c
index 7fd0c1793ba3..a599fc5d63c5 100644
--- a/drivers/gpu/drm/msm/dp/dp_audio.c
+++ b/drivers/gpu/drm/msm/dp/dp_audio.c
@@ -32,11 +32,7 @@ static u32 dp_audio_get_header(struct dp_catalog *catalog,
 		enum dp_catalog_audio_sdp_type sdp,
 		enum dp_catalog_audio_header_type header)
 {
-	catalog->sdp_type = sdp;
-	catalog->sdp_header = header;
-	dp_catalog_audio_get_header(catalog);
-
-	return catalog->audio_data;
+	return dp_catalog_audio_get_header(catalog, sdp, header);
 }
 
 static void dp_audio_set_header(struct dp_catalog *catalog,
@@ -44,10 +40,7 @@ static void dp_audio_set_header(struct dp_catalog *catalog,
 		enum dp_catalog_audio_sdp_type sdp,
 		enum dp_catalog_audio_header_type header)
 {
-	catalog->sdp_type = sdp;
-	catalog->sdp_header = header;
-	catalog->audio_data = data;
-	dp_catalog_audio_set_header(catalog);
+	dp_catalog_audio_set_header(catalog, sdp, header, data);
 }
 
 static void dp_audio_stream_sdp(struct dp_audio_private *audio)
@@ -317,8 +310,7 @@ static void dp_audio_setup_acr(struct dp_audio_private *audio)
 		break;
 	}
 
-	catalog->audio_data = select;
-	dp_catalog_audio_config_acr(catalog);
+	dp_catalog_audio_config_acr(catalog, select);
 }
 
 static void dp_audio_safe_to_exit_level(struct dp_audio_private *audio)
@@ -344,16 +336,14 @@ static void dp_audio_safe_to_exit_level(struct dp_audio_private *audio)
 		break;
 	}
 
-	catalog->audio_data = safe_to_exit_level;
-	dp_catalog_audio_sfe_level(catalog);
+	dp_catalog_audio_sfe_level(catalog, safe_to_exit_level);
 }
 
 static void dp_audio_enable(struct dp_audio_private *audio, bool enable)
 {
 	struct dp_catalog *catalog = audio->catalog;
 
-	catalog->audio_data = enable;
-	dp_catalog_audio_enable(catalog);
+	dp_catalog_audio_enable(catalog, enable);
 }
 
 static struct dp_audio_private *dp_audio_get_data(struct platform_device *pdev)
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c
index 00ad3ebaa5a1..970d62e1610c 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.c
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.c
@@ -1159,34 +1159,28 @@ struct dp_catalog *dp_catalog_get(struct device *dev)
 	return &catalog->dp_catalog;
 }
 
-void dp_catalog_audio_get_header(struct dp_catalog *dp_catalog)
+u32 dp_catalog_audio_get_header(struct dp_catalog *dp_catalog,
+				enum dp_catalog_audio_sdp_type sdp,
+				enum dp_catalog_audio_header_type header)
 {
 	struct dp_catalog_private *catalog;
 	u32 (*sdp_map)[DP_AUDIO_SDP_HEADER_MAX];
-	enum dp_catalog_audio_sdp_type sdp;
-	enum dp_catalog_audio_header_type header;
-
-	if (!dp_catalog)
-		return;
 
 	catalog = container_of(dp_catalog,
 		struct dp_catalog_private, dp_catalog);
 
 	sdp_map = catalog->audio_map;
-	sdp     = dp_catalog->sdp_type;
-	header  = dp_catalog->sdp_header;
 
-	dp_catalog->audio_data = dp_read_link(catalog,
-			sdp_map[sdp][header]);
+	return dp_read_link(catalog, sdp_map[sdp][header]);
 }
 
-void dp_catalog_audio_set_header(struct dp_catalog *dp_catalog)
+void dp_catalog_audio_set_header(struct dp_catalog *dp_catalog,
+				 enum dp_catalog_audio_sdp_type sdp,
+				 enum dp_catalog_audio_header_type header,
+				 u32 data)
 {
 	struct dp_catalog_private *catalog;
 	u32 (*sdp_map)[DP_AUDIO_SDP_HEADER_MAX];
-	enum dp_catalog_audio_sdp_type sdp;
-	enum dp_catalog_audio_header_type header;
-	u32 data;
 
 	if (!dp_catalog)
 		return;
@@ -1195,17 +1189,14 @@ void dp_catalog_audio_set_header(struct dp_catalog *dp_catalog)
 		struct dp_catalog_private, dp_catalog);
 
 	sdp_map = catalog->audio_map;
-	sdp     = dp_catalog->sdp_type;
-	header  = dp_catalog->sdp_header;
-	data    = dp_catalog->audio_data;
 
 	dp_write_link(catalog, sdp_map[sdp][header], data);
 }
 
-void dp_catalog_audio_config_acr(struct dp_catalog *dp_catalog)
+void dp_catalog_audio_config_acr(struct dp_catalog *dp_catalog, u32 select)
 {
 	struct dp_catalog_private *catalog;
-	u32 acr_ctrl, select;
+	u32 acr_ctrl;
 
 	if (!dp_catalog)
 		return;
@@ -1213,7 +1204,6 @@ void dp_catalog_audio_config_acr(struct dp_catalog *dp_catalog)
 	catalog = container_of(dp_catalog,
 		struct dp_catalog_private, dp_catalog);
 
-	select = dp_catalog->audio_data;
 	acr_ctrl = select << 4 | BIT(31) | BIT(8) | BIT(14);
 
 	drm_dbg_dp(catalog->drm_dev, "select: %#x, acr_ctrl: %#x\n",
@@ -1222,10 +1212,9 @@ void dp_catalog_audio_config_acr(struct dp_catalog *dp_catalog)
 	dp_write_link(catalog, MMSS_DP_AUDIO_ACR_CTRL, acr_ctrl);
 }
 
-void dp_catalog_audio_enable(struct dp_catalog *dp_catalog)
+void dp_catalog_audio_enable(struct dp_catalog *dp_catalog, bool enable)
 {
 	struct dp_catalog_private *catalog;
-	bool enable;
 	u32 audio_ctrl;
 
 	if (!dp_catalog)
@@ -1234,7 +1223,6 @@ void dp_catalog_audio_enable(struct dp_catalog *dp_catalog)
 	catalog = container_of(dp_catalog,
 		struct dp_catalog_private, dp_catalog);
 
-	enable = !!dp_catalog->audio_data;
 	audio_ctrl = dp_read_link(catalog, MMSS_DP_AUDIO_CFG);
 
 	if (enable)
@@ -1329,10 +1317,10 @@ void dp_catalog_audio_init(struct dp_catalog *dp_catalog)
 	catalog->audio_map = sdp_map;
 }
 
-void dp_catalog_audio_sfe_level(struct dp_catalog *dp_catalog)
+void dp_catalog_audio_sfe_level(struct dp_catalog *dp_catalog, u32 safe_to_exit_level)
 {
 	struct dp_catalog_private *catalog;
-	u32 mainlink_levels, safe_to_exit_level;
+	u32 mainlink_levels;
 
 	if (!dp_catalog)
 		return;
@@ -1340,7 +1328,6 @@ void dp_catalog_audio_sfe_level(struct dp_catalog *dp_catalog)
 	catalog = container_of(dp_catalog,
 		struct dp_catalog_private, dp_catalog);
 
-	safe_to_exit_level = dp_catalog->audio_data;
 	mainlink_levels = dp_read_link(catalog, REG_DP_MAINLINK_LEVELS);
 	mainlink_levels &= 0xFE0;
 	mainlink_levels |= safe_to_exit_level;
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.h b/drivers/gpu/drm/msm/dp/dp_catalog.h
index a82ab4856b50..cd1ad046a953 100644
--- a/drivers/gpu/drm/msm/dp/dp_catalog.h
+++ b/drivers/gpu/drm/msm/dp/dp_catalog.h
@@ -48,9 +48,6 @@ enum dp_catalog_audio_header_type {
 };
 
 struct dp_catalog {
-	enum dp_catalog_audio_sdp_type sdp_type;
-	enum dp_catalog_audio_header_type sdp_header;
-	u32 audio_data;
 	bool wide_bus_en;
 };
 
@@ -114,12 +111,17 @@ void dp_catalog_panel_tpg_disable(struct dp_catalog *dp_catalog);
 struct dp_catalog *dp_catalog_get(struct device *dev);
 
 /* DP Audio APIs */
-void dp_catalog_audio_get_header(struct dp_catalog *catalog);
-void dp_catalog_audio_set_header(struct dp_catalog *catalog);
-void dp_catalog_audio_config_acr(struct dp_catalog *catalog);
-void dp_catalog_audio_enable(struct dp_catalog *catalog);
+u32 dp_catalog_audio_get_header(struct dp_catalog *dp_catalog,
+				enum dp_catalog_audio_sdp_type sdp,
+				enum dp_catalog_audio_header_type header);
+void dp_catalog_audio_set_header(struct dp_catalog *dp_catalog,
+				 enum dp_catalog_audio_sdp_type sdp,
+				 enum dp_catalog_audio_header_type header,
+				 u32 data);
+void dp_catalog_audio_config_acr(struct dp_catalog *catalog, u32 select);
+void dp_catalog_audio_enable(struct dp_catalog *catalog, bool enable);
 void dp_catalog_audio_config_sdp(struct dp_catalog *catalog);
 void dp_catalog_audio_init(struct dp_catalog *catalog);
-void dp_catalog_audio_sfe_level(struct dp_catalog *catalog);
+void dp_catalog_audio_sfe_level(struct dp_catalog *catalog, u32 safe_to_exit_level);
 
 #endif /* _DP_CATALOG_H_ */

-- 
2.43.0

Re: [PATCH v2 1/6] drm/msm/dp: Drop unused dp_debug struct

[Dmitry Baryshkov]

On Thu, 28 Mar 2024 at 16:35, Bjorn Andersson <andersson@kernel.org> wrote:
>
> From: Bjorn Andersson <quic_bjorande@quicinc.com>
>
> The members of struct dp_debug are no longer used, so the only purpose
> of this struct is as a type of the return value of dp_debug_get(), to
> signal success/error.
>
> Drop the struct in favor of signalling the result of initialization
> using an int, then merge dp_debug_get() with dp_debug_init() to avoid
> the unnecessar boilerplate code.
>
> Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
> ---
>  drivers/gpu/drm/msm/dp/dp_debug.c   | 59 +++++++++++--------------------------
>  drivers/gpu/drm/msm/dp/dp_debug.h   | 38 +++++++-----------------
>  drivers/gpu/drm/msm/dp/dp_display.c | 10 ++-----
>  3 files changed, 31 insertions(+), 76 deletions(-)

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>


-- 
With best wishes
Dmitry

Re: [PATCH v2 6/6] drm/msm/dp: Use function arguments for audio operations

[Abhinav Kumar]

On 3/28/2024 7:40 AM, Bjorn Andersson wrote:
> From: Bjorn Andersson <quic_bjorande@quicinc.com>
> 
> The dp_audio read and write operations uses members in struct dp_catalog
> for passing arguments and return values. This adds unnecessary
> complexity to the implementation, as it turns out after detangling the
> logic that no state is actually held in these variables.
> 
> Clean this up by using function arguments and return values for passing
> the data.
> 
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
> ---
>   drivers/gpu/drm/msm/dp/dp_audio.c   | 20 +++++--------------
>   drivers/gpu/drm/msm/dp/dp_catalog.c | 39 +++++++++++++------------------------
>   drivers/gpu/drm/msm/dp/dp_catalog.h | 18 +++++++++--------
>   3 files changed, 28 insertions(+), 49 deletions(-)
> 

One quick question, was DP audio re-tested after this patch?

Re: [PATCH v2 6/6] drm/msm/dp: Use function arguments for audio operations

[Bjorn Andersson]

On Mon, Apr 08, 2024 at 02:31:45PM -0700, Abhinav Kumar wrote:
> On 3/28/2024 7:40 AM, Bjorn Andersson wrote:
> > From: Bjorn Andersson <quic_bjorande@quicinc.com>
> > 
> > The dp_audio read and write operations uses members in struct dp_catalog
> > for passing arguments and return values. This adds unnecessary
> > complexity to the implementation, as it turns out after detangling the
> > logic that no state is actually held in these variables.
> > 
> > Clean this up by using function arguments and return values for passing
> > the data.
> > 
> > Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
> > Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
> > ---
> >   drivers/gpu/drm/msm/dp/dp_audio.c   | 20 +++++--------------
> >   drivers/gpu/drm/msm/dp/dp_catalog.c | 39 +++++++++++++------------------------
> >   drivers/gpu/drm/msm/dp/dp_catalog.h | 18 +++++++++--------
> >   3 files changed, 28 insertions(+), 49 deletions(-)
> > 
> 
> One quick question, was DP audio re-tested after this patch?

No, sorry for not being explicit about that. I don't have any target
with working DP audio...

Regards,
Bjorn