From 627563d1696b8978b550ed192acc1bc8fc461da5 Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Sat, 28 Mar 2015 18:13:52 +0000
Subject: drm/edid: add function to help find SADs

Add a function to find the start of the SADs in the ELD.  This
complements the helper to retrieve the SAD count.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 include/drm/drm_edid.h | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index 799050198323..53c53c459b15 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -347,6 +347,25 @@ static inline int drm_eld_mnl(const uint8_t *eld)
 	return (eld[DRM_ELD_CEA_EDID_VER_MNL] & DRM_ELD_MNL_MASK) >> DRM_ELD_MNL_SHIFT;
 }
 
+/**
+ * drm_eld_sad - Get ELD SAD structures.
+ * @eld: pointer to an eld memory structure with sad_count set
+ */
+static inline const uint8_t *drm_eld_sad(const uint8_t *eld)
+{
+	unsigned int ver, mnl;
+
+	ver = (eld[DRM_ELD_VER] & DRM_ELD_VER_MASK) >> DRM_ELD_VER_SHIFT;
+	if (ver != 2 && ver != 31)
+		return NULL;
+
+	mnl = drm_eld_mnl(eld);
+	if (mnl > 16)
+		return NULL;
+
+	return eld + DRM_ELD_CEA_SAD(mnl, 0);
+}
+
 /**
  * drm_eld_sad_count - Get ELD SAD count.
  * @eld: pointer to an eld memory structure with sad_count set
-- 
cgit v1.2.3


From 36b8ae0d608696cb8b48639813ec22be99c4a8e6 Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Tue, 31 Mar 2015 18:23:16 +0100
Subject: drm: imx/dw_hdmi: move phy comments

The phy comments in dw_hdmi.c applied to the iMX6 version.  Move these
comments to the iMX6 dw_hdmi-imx data along side the data.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.c  | 3 ---
 drivers/gpu/drm/imx/dw_hdmi-imx.c | 5 +++++
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index 49cafb61d290..3494391e4199 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -834,11 +834,8 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi, unsigned char prep,
 		    phy_config[i].mpixelclock)
 			break;
 
-	/* RESISTANCE TERM 133Ohm Cfg */
 	hdmi_phy_i2c_write(hdmi, phy_config[i].term, 0x19);  /* TXTERM */
-	/* PREEMP Cgf 0.00 */
 	hdmi_phy_i2c_write(hdmi, phy_config[i].sym_ctr, 0x09); /* CKSYMTXCTRL */
-	/* TX/CK LVL 10 */
 	hdmi_phy_i2c_write(hdmi, phy_config[i].vlev_ctr, 0x0E); /* VLEVCTRL */
 
 	/* REMOVE CLK TERM */
diff --git a/drivers/gpu/drm/imx/dw_hdmi-imx.c b/drivers/gpu/drm/imx/dw_hdmi-imx.c
index a3ecf1069b76..644edf65dbe0 100644
--- a/drivers/gpu/drm/imx/dw_hdmi-imx.c
+++ b/drivers/gpu/drm/imx/dw_hdmi-imx.c
@@ -75,6 +75,11 @@ static const struct dw_hdmi_curr_ctrl imx_cur_ctr[] = {
 	},
 };
 
+/*
+ * Resistance term 133Ohm Cfg
+ * PREEMP config 0.00
+ * TX/CK level 10
+ */
 static const struct dw_hdmi_phy_config imx_phy_config[] = {
 	/*pixelclk   symbol   term   vlev */
 	{ 148500000, 0x800d, 0x0005, 0x01ad},
-- 
cgit v1.2.3


From 39cc1535fe1e401c523065f7b219ac1cd76e4a7d Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Tue, 31 Mar 2015 18:34:11 +0100
Subject: drm: bridge/dw_hdmi: clean up phy configuration

The phy configuration is dependent on the SoC, and we look up values for
some of the registers in SoC specific data.  However, we had partially
programmed the phy before we had successfully looked up the clock rate.
Also, we were only checking that we had a valid configuration for the
currctrl register.

Move all these lookups to the start of this function instead, so we can
check that all lookups were successful before beginning to program the
phy.

Tested-by: Yakir Yang <ykk@rock-chips.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 68 +++++++++++++++++++++-------------------
 1 file changed, 35 insertions(+), 33 deletions(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index 3494391e4199..23ea8c5c85b6 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -753,12 +753,12 @@ static void dw_hdmi_phy_sel_interface_control(struct dw_hdmi *hdmi, u8 enable)
 static int hdmi_phy_configure(struct dw_hdmi *hdmi, unsigned char prep,
 			      unsigned char res, int cscon)
 {
-	unsigned res_idx, i;
+	unsigned res_idx;
 	u8 val, msec;
-	const struct dw_hdmi_plat_data *plat_data = hdmi->plat_data;
-	const struct dw_hdmi_mpll_config *mpll_config = plat_data->mpll_cfg;
-	const struct dw_hdmi_curr_ctrl *curr_ctrl = plat_data->cur_ctr;
-	const struct dw_hdmi_phy_config *phy_config = plat_data->phy_config;
+	const struct dw_hdmi_plat_data *pdata = hdmi->plat_data;
+	const struct dw_hdmi_mpll_config *mpll_config = pdata->mpll_cfg;
+	const struct dw_hdmi_curr_ctrl *curr_ctrl = pdata->cur_ctr;
+	const struct dw_hdmi_phy_config *phy_config = pdata->phy_config;
 
 	if (prep)
 		return -EINVAL;
@@ -778,6 +778,30 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi, unsigned char prep,
 		return -EINVAL;
 	}
 
+	/* PLL/MPLL Cfg - always match on final entry */
+	for (; mpll_config->mpixelclock != ~0UL; mpll_config++)
+		if (hdmi->hdmi_data.video_mode.mpixelclock <=
+		    mpll_config->mpixelclock)
+			break;
+
+	for (; curr_ctrl->mpixelclock != ~0UL; curr_ctrl++)
+		if (hdmi->hdmi_data.video_mode.mpixelclock <=
+		    curr_ctrl->mpixelclock)
+			break;
+
+	for (; phy_config->mpixelclock != ~0UL; phy_config++)
+		if (hdmi->hdmi_data.video_mode.mpixelclock <=
+		    phy_config->mpixelclock)
+			break;
+
+	if (mpll_config->mpixelclock == ~0UL ||
+	    curr_ctrl->mpixelclock == ~0UL ||
+	    phy_config->mpixelclock == ~0UL) {
+		dev_err(hdmi->dev, "Pixel clock %d - unsupported by HDMI\n",
+			hdmi->hdmi_data.video_mode.mpixelclock);
+		return -EINVAL;
+	}
+
 	/* Enable csc path */
 	if (cscon)
 		val = HDMI_MC_FLOWCTRL_FEED_THROUGH_OFF_CSC_IN_PATH;
@@ -803,40 +827,18 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi, unsigned char prep,
 		    HDMI_PHY_I2CM_SLAVE_ADDR);
 	hdmi_phy_test_clear(hdmi, 0);
 
-	/* PLL/MPLL Cfg - always match on final entry */
-	for (i = 0; mpll_config[i].mpixelclock != (~0UL); i++)
-		if (hdmi->hdmi_data.video_mode.mpixelclock <=
-		    mpll_config[i].mpixelclock)
-			break;
-
-	hdmi_phy_i2c_write(hdmi, mpll_config[i].res[res_idx].cpce, 0x06);
-	hdmi_phy_i2c_write(hdmi, mpll_config[i].res[res_idx].gmp, 0x15);
-
-	for (i = 0; curr_ctrl[i].mpixelclock != (~0UL); i++)
-		if (hdmi->hdmi_data.video_mode.mpixelclock <=
-		    curr_ctrl[i].mpixelclock)
-			break;
-
-	if (curr_ctrl[i].mpixelclock == (~0UL)) {
-		dev_err(hdmi->dev, "Pixel clock %d - unsupported by HDMI\n",
-			hdmi->hdmi_data.video_mode.mpixelclock);
-		return -EINVAL;
-	}
+	hdmi_phy_i2c_write(hdmi, mpll_config->res[res_idx].cpce, 0x06);
+	hdmi_phy_i2c_write(hdmi, mpll_config->res[res_idx].gmp, 0x15);
 
 	/* CURRCTRL */
-	hdmi_phy_i2c_write(hdmi, curr_ctrl[i].curr[res_idx], 0x10);
+	hdmi_phy_i2c_write(hdmi, curr_ctrl->curr[res_idx], 0x10);
 
 	hdmi_phy_i2c_write(hdmi, 0x0000, 0x13);  /* PLLPHBYCTRL */
 	hdmi_phy_i2c_write(hdmi, 0x0006, 0x17);
 
-	for (i = 0; phy_config[i].mpixelclock != (~0UL); i++)
-		if (hdmi->hdmi_data.video_mode.mpixelclock <=
-		    phy_config[i].mpixelclock)
-			break;
-
-	hdmi_phy_i2c_write(hdmi, phy_config[i].term, 0x19);  /* TXTERM */
-	hdmi_phy_i2c_write(hdmi, phy_config[i].sym_ctr, 0x09); /* CKSYMTXCTRL */
-	hdmi_phy_i2c_write(hdmi, phy_config[i].vlev_ctr, 0x0E); /* VLEVCTRL */
+	hdmi_phy_i2c_write(hdmi, phy_config->term, 0x19);  /* TXTERM */
+	hdmi_phy_i2c_write(hdmi, phy_config->sym_ctr, 0x09); /* CKSYMTXCTRL */
+	hdmi_phy_i2c_write(hdmi, phy_config->vlev_ctr, 0x0E); /* VLEVCTRL */
 
 	/* REMOVE CLK TERM */
 	hdmi_phy_i2c_write(hdmi, 0x8000, 0x05);  /* CKCALCTRL */
-- 
cgit v1.2.3


From f879b38f9155e85dc30a2e1e7d18b06251a7f9f8 Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Fri, 27 Mar 2015 12:53:29 +0000
Subject: drm: bridge/dw_hdmi: clean up hdmi_set_clk_regenerator()

Clean up hdmi_set_clk_regenerator() by allowing it to take the audio
sample rate and ratio directly, rather than hiding it inside the
function.  Raise the unsupported pixel clock/sample rate message from
debug to error level as this results in audio not working correctly.

Tested-by: Yakir Yang <ykk@rock-chips.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 32 +++++++++++++++-----------------
 1 file changed, 15 insertions(+), 17 deletions(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index 23ea8c5c85b6..75099b80ca7e 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -335,39 +335,37 @@ static unsigned int hdmi_compute_cts(unsigned int freq, unsigned long pixel_clk,
 }
 
 static void hdmi_set_clk_regenerator(struct dw_hdmi *hdmi,
-				     unsigned long pixel_clk)
+	unsigned long pixel_clk, unsigned int sample_rate, unsigned int ratio)
 {
-	unsigned int clk_n, clk_cts;
+	unsigned int n, cts;
 
-	clk_n = hdmi_compute_n(hdmi->sample_rate, pixel_clk,
-			       hdmi->ratio);
-	clk_cts = hdmi_compute_cts(hdmi->sample_rate, pixel_clk,
-				   hdmi->ratio);
-
-	if (!clk_cts) {
-		dev_dbg(hdmi->dev, "%s: pixel clock not supported: %lu\n",
-			__func__, pixel_clk);
-		return;
+	n = hdmi_compute_n(sample_rate, pixel_clk, ratio);
+	cts = hdmi_compute_cts(sample_rate, pixel_clk, ratio);
+	if (!cts) {
+		dev_err(hdmi->dev,
+			"%s: pixel clock/sample rate not supported: %luMHz / %ukHz\n",
+			__func__, pixel_clk, sample_rate);
 	}
 
-	dev_dbg(hdmi->dev, "%s: samplerate=%d  ratio=%d  pixelclk=%lu  N=%d cts=%d\n",
-		__func__, hdmi->sample_rate, hdmi->ratio,
-		pixel_clk, clk_n, clk_cts);
+	dev_dbg(hdmi->dev, "%s: samplerate=%ukHz ratio=%d pixelclk=%luMHz N=%d cts=%d\n",
+		__func__, sample_rate, ratio, pixel_clk, n, cts);
 
-	hdmi_set_cts_n(hdmi, clk_cts, clk_n);
+	hdmi_set_cts_n(hdmi, cts, n);
 }
 
 static void hdmi_init_clk_regenerator(struct dw_hdmi *hdmi)
 {
 	mutex_lock(&hdmi->audio_mutex);
-	hdmi_set_clk_regenerator(hdmi, 74250000);
+	hdmi_set_clk_regenerator(hdmi, 74250000, hdmi->sample_rate,
+				 hdmi->ratio);
 	mutex_unlock(&hdmi->audio_mutex);
 }
 
 static void hdmi_clk_regenerator_update_pixel_clock(struct dw_hdmi *hdmi)
 {
 	mutex_lock(&hdmi->audio_mutex);
-	hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock);
+	hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock,
+				 hdmi->sample_rate, hdmi->ratio);
 	mutex_unlock(&hdmi->audio_mutex);
 }
 
-- 
cgit v1.2.3


From d4ac4cb69e79e3175329e03262354beef6aab38b Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Fri, 27 Mar 2015 20:06:50 +0000
Subject: drm: bridge/dw_hdmi: use drm_hdmi_avi_infoframe_from_display_mode()

Use drm_hdmi_avi_infoframe_from_display_mode() to compose the AVI
frame.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 126 +++++++++++++++++++++------------------
 1 file changed, 67 insertions(+), 59 deletions(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index 75099b80ca7e..0f3ccfa3ccfc 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -918,74 +918,79 @@ static void hdmi_tx_hdcp_config(struct dw_hdmi *hdmi)
 		  HDMI_A_HDCPCFG1_ENCRYPTIONDISABLE_MASK, HDMI_A_HDCPCFG1);
 }
 
-static void hdmi_config_AVI(struct dw_hdmi *hdmi)
+static void hdmi_config_AVI(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
 {
-	u8 val, pix_fmt, under_scan;
-	u8 act_ratio, coded_ratio, colorimetry, ext_colorimetry;
-	bool aspect_16_9;
+	struct hdmi_avi_infoframe frame;
+	u8 val;
 
-	aspect_16_9 = false; /* FIXME */
+	/* Initialise info frame from DRM mode */
+	drm_hdmi_avi_infoframe_from_display_mode(&frame, mode);
 
-	/* AVI Data Byte 1 */
 	if (hdmi->hdmi_data.enc_out_format == YCBCR444)
-		pix_fmt = HDMI_FC_AVICONF0_PIX_FMT_YCBCR444;
+		frame.colorspace = HDMI_COLORSPACE_YUV444;
 	else if (hdmi->hdmi_data.enc_out_format == YCBCR422_8BITS)
-		pix_fmt = HDMI_FC_AVICONF0_PIX_FMT_YCBCR422;
+		frame.colorspace = HDMI_COLORSPACE_YUV422;
 	else
-		pix_fmt = HDMI_FC_AVICONF0_PIX_FMT_RGB;
-
-		under_scan =  HDMI_FC_AVICONF0_SCAN_INFO_NODATA;
-
-	/*
-	 * Active format identification data is present in the AVI InfoFrame.
-	 * Under scan info, no bar data
-	 */
-	val = pix_fmt | under_scan |
-		HDMI_FC_AVICONF0_ACTIVE_FMT_INFO_PRESENT |
-		HDMI_FC_AVICONF0_BAR_DATA_NO_DATA;
-
-	hdmi_writeb(hdmi, val, HDMI_FC_AVICONF0);
-
-	/* AVI Data Byte 2 -Set the Aspect Ratio */
-	if (aspect_16_9) {
-		act_ratio = HDMI_FC_AVICONF1_ACTIVE_ASPECT_RATIO_16_9;
-		coded_ratio = HDMI_FC_AVICONF1_CODED_ASPECT_RATIO_16_9;
-	} else {
-		act_ratio = HDMI_FC_AVICONF1_ACTIVE_ASPECT_RATIO_4_3;
-		coded_ratio = HDMI_FC_AVICONF1_CODED_ASPECT_RATIO_4_3;
-	}
+		frame.colorspace = HDMI_COLORSPACE_RGB;
 
 	/* Set up colorimetry */
 	if (hdmi->hdmi_data.enc_out_format == XVYCC444) {
-		colorimetry = HDMI_FC_AVICONF1_COLORIMETRY_EXTENDED_INFO;
+		frame.colorimetry = HDMI_COLORIMETRY_EXTENDED;
 		if (hdmi->hdmi_data.colorimetry == HDMI_COLORIMETRY_ITU_601)
-			ext_colorimetry =
-				HDMI_FC_AVICONF2_EXT_COLORIMETRY_XVYCC601;
+			frame.extended_colorimetry =
+				HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
 		else /*hdmi->hdmi_data.colorimetry == HDMI_COLORIMETRY_ITU_709*/
-			ext_colorimetry =
-				HDMI_FC_AVICONF2_EXT_COLORIMETRY_XVYCC709;
+			frame.extended_colorimetry =
+				HDMI_EXTENDED_COLORIMETRY_XV_YCC_709;
 	} else if (hdmi->hdmi_data.enc_out_format != RGB) {
 		if (hdmi->hdmi_data.colorimetry == HDMI_COLORIMETRY_ITU_601)
-			colorimetry = HDMI_FC_AVICONF1_COLORIMETRY_SMPTE;
+			frame.colorimetry = HDMI_COLORIMETRY_ITU_601;
 		else /*hdmi->hdmi_data.colorimetry == HDMI_COLORIMETRY_ITU_709*/
-			colorimetry = HDMI_FC_AVICONF1_COLORIMETRY_ITUR;
-		ext_colorimetry = HDMI_FC_AVICONF2_EXT_COLORIMETRY_XVYCC601;
+			frame.colorimetry = HDMI_COLORIMETRY_ITU_709;
+		frame.extended_colorimetry = HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
 	} else { /* Carries no data */
-		colorimetry = HDMI_FC_AVICONF1_COLORIMETRY_NO_DATA;
-		ext_colorimetry = HDMI_FC_AVICONF2_EXT_COLORIMETRY_XVYCC601;
+		frame.colorimetry = HDMI_COLORIMETRY_NONE;
+		frame.extended_colorimetry = HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
 	}
 
-	val = colorimetry | coded_ratio | act_ratio;
+	frame.scan_mode = HDMI_SCAN_MODE_NONE;
+
+	/*
+	 * The Designware IP uses a different byte format from standard
+	 * AVI info frames, though generally the bits are in the correct
+	 * bytes.
+	 */
+
+	/*
+	 * AVI data byte 1 differences: Colorspace in bits 4,5 rather than 5,6,
+	 * active aspect present in bit 6 rather than 4.
+	 */
+	val = (frame.colorspace & 3) << 4 | (frame.scan_mode & 0x3);
+	if (frame.active_aspect & 15)
+		val |= HDMI_FC_AVICONF0_ACTIVE_FMT_INFO_PRESENT;
+	if (frame.top_bar || frame.bottom_bar)
+		val |= HDMI_FC_AVICONF0_BAR_DATA_HORIZ_BAR;
+	if (frame.left_bar || frame.right_bar)
+		val |= HDMI_FC_AVICONF0_BAR_DATA_VERT_BAR;
+	hdmi_writeb(hdmi, val, HDMI_FC_AVICONF0);
+
+	/* AVI data byte 2 differences: none */
+	val = ((frame.colorimetry & 0x3) << 6) |
+	      ((frame.picture_aspect & 0x3) << 4) |
+	      (frame.active_aspect & 0xf);
 	hdmi_writeb(hdmi, val, HDMI_FC_AVICONF1);
 
-	/* AVI Data Byte 3 */
-	val = HDMI_FC_AVICONF2_IT_CONTENT_NO_DATA | ext_colorimetry |
-		HDMI_FC_AVICONF2_RGB_QUANT_DEFAULT |
-		HDMI_FC_AVICONF2_SCALING_NONE;
+	/* AVI data byte 3 differences: none */
+	val = ((frame.extended_colorimetry & 0x7) << 4) |
+	      ((frame.quantization_range & 0x3) << 2) |
+	      (frame.nups & 0x3);
+	if (frame.itc)
+		val |= HDMI_FC_AVICONF2_IT_CONTENT_VALID;
 	hdmi_writeb(hdmi, val, HDMI_FC_AVICONF2);
 
-	/* AVI Data Byte 4 */
-	hdmi_writeb(hdmi, hdmi->vic, HDMI_FC_AVIVID);
+	/* AVI data byte 4 differences: none */
+	val = frame.video_code & 0x7f;
+	hdmi_writeb(hdmi, val, HDMI_FC_AVIVID);
 
 	/* AVI Data Byte 5- set up input and output pixel repetition */
 	val = (((hdmi->hdmi_data.video_mode.mpixelrepetitioninput + 1) <<
@@ -996,20 +1001,23 @@ static void hdmi_config_AVI(struct dw_hdmi *hdmi)
 		HDMI_FC_PRCONF_OUTPUT_PR_FACTOR_MASK);
 	hdmi_writeb(hdmi, val, HDMI_FC_PRCONF);
 
-	/* IT Content and quantization range = don't care */
-	val = HDMI_FC_AVICONF3_IT_CONTENT_TYPE_GRAPHICS |
-		HDMI_FC_AVICONF3_QUANT_RANGE_LIMITED;
+	/*
+	 * AVI data byte 5 differences: content type in 0,1 rather than 4,5,
+	 * ycc range in bits 2,3 rather than 6,7
+	 */
+	val = ((frame.ycc_quantization_range & 0x3) << 2) |
+	      (frame.content_type & 0x3);
 	hdmi_writeb(hdmi, val, HDMI_FC_AVICONF3);
 
 	/* AVI Data Bytes 6-13 */
-	hdmi_writeb(hdmi, 0, HDMI_FC_AVIETB0);
-	hdmi_writeb(hdmi, 0, HDMI_FC_AVIETB1);
-	hdmi_writeb(hdmi, 0, HDMI_FC_AVISBB0);
-	hdmi_writeb(hdmi, 0, HDMI_FC_AVISBB1);
-	hdmi_writeb(hdmi, 0, HDMI_FC_AVIELB0);
-	hdmi_writeb(hdmi, 0, HDMI_FC_AVIELB1);
-	hdmi_writeb(hdmi, 0, HDMI_FC_AVISRB0);
-	hdmi_writeb(hdmi, 0, HDMI_FC_AVISRB1);
+	hdmi_writeb(hdmi, frame.top_bar & 0xff, HDMI_FC_AVIETB0);
+	hdmi_writeb(hdmi, (frame.top_bar >> 8) & 0xff, HDMI_FC_AVIETB1);
+	hdmi_writeb(hdmi, frame.bottom_bar & 0xff, HDMI_FC_AVISBB0);
+	hdmi_writeb(hdmi, (frame.bottom_bar >> 8) & 0xff, HDMI_FC_AVISBB1);
+	hdmi_writeb(hdmi, frame.left_bar & 0xff, HDMI_FC_AVIELB0);
+	hdmi_writeb(hdmi, (frame.left_bar >> 8) & 0xff, HDMI_FC_AVIELB1);
+	hdmi_writeb(hdmi, frame.right_bar & 0xff, HDMI_FC_AVISRB0);
+	hdmi_writeb(hdmi, (frame.right_bar >> 8) & 0xff, HDMI_FC_AVISRB1);
 }
 
 static void hdmi_av_composer(struct dw_hdmi *hdmi,
@@ -1243,7 +1251,7 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
 		hdmi_enable_audio_clk(hdmi);
 
 		/* HDMI Initialization Step F - Configure AVI InfoFrame */
-		hdmi_config_AVI(hdmi);
+		hdmi_config_AVI(hdmi, mode);
 	}
 
 	hdmi_video_packetize(hdmi);
-- 
cgit v1.2.3


From d083c312cba2735566af9598cb281ea2ae6b729a Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Fri, 27 Mar 2015 23:14:16 +0000
Subject: drm: bridge/dw_hdmi: simplify hdmi_config_AVI() a little

When a YCBCR format is selected, we can merely copy the colorimetry
information directly as we use the same definitions for both the
unpacked AVI info frame and the hdmi_data_info structure.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index 0f3ccfa3ccfc..a8bd3fbf4300 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -943,10 +943,7 @@ static void hdmi_config_AVI(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
 			frame.extended_colorimetry =
 				HDMI_EXTENDED_COLORIMETRY_XV_YCC_709;
 	} else if (hdmi->hdmi_data.enc_out_format != RGB) {
-		if (hdmi->hdmi_data.colorimetry == HDMI_COLORIMETRY_ITU_601)
-			frame.colorimetry = HDMI_COLORIMETRY_ITU_601;
-		else /*hdmi->hdmi_data.colorimetry == HDMI_COLORIMETRY_ITU_709*/
-			frame.colorimetry = HDMI_COLORIMETRY_ITU_709;
+		frame.colorimetry = hdmi->hdmi_data.colorimetry;
 		frame.extended_colorimetry = HDMI_EXTENDED_COLORIMETRY_XV_YCC_601;
 	} else { /* Carries no data */
 		frame.colorimetry = HDMI_COLORIMETRY_NONE;
-- 
cgit v1.2.3


From a1b9f2ae213dd085bbe3c9fa68c5c4af5db9c77b Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Fri, 5 Jun 2015 12:18:09 +0100
Subject: drm: bridge/dw_hdmi: remove unused 'regmap' struct member

This driver does not make use of regmaps, let's remove this unnecessary
structure member.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index a8bd3fbf4300..658a2f7179a9 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -123,7 +123,6 @@ struct dw_hdmi {
 	bool phy_enabled;
 	struct drm_display_mode previous_mode;
 
-	struct regmap *regmap;
 	struct i2c_adapter *ddc;
 	void __iomem *regs;
 
-- 
cgit v1.2.3


From 4b9bcaa7f18ef7c599963464d282bc769997f83b Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Sat, 6 Jun 2015 00:12:41 +0100
Subject: drm: bridge/dw_hdmi: use our own drm_device

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index 658a2f7179a9..1bb1355b2746 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -1504,7 +1504,7 @@ static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
 
 			dw_hdmi_poweroff(hdmi);
 		}
-		drm_helper_hpd_irq_event(hdmi->connector.dev);
+		drm_helper_hpd_irq_event(hdmi->bridge->dev);
 	}
 
 	hdmi_writeb(hdmi, intr_stat, HDMI_IH_PHY_STAT0);
-- 
cgit v1.2.3


From b91eee8cd8a547e43e271e5908e16c4a53c9416d Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Fri, 27 Mar 2015 23:27:17 +0000
Subject: drm: bridge/dw_hdmi: remove mhsyncpolarity/mvsyncpolarity/minterlaced

Remove the struct hdmi_vmode mhsyncpolarity/mvsyncpolarity/minterlaced
members, which are only used within a single function.  We can directly
reference the appropriate mode->flags instead.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 22 ++++++++--------------
 1 file changed, 8 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index 1bb1355b2746..eeb01693812a 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -82,9 +82,6 @@ static const u16 csc_coeff_rgb_in_eitu709[3][4] = {
 
 struct hdmi_vmode {
 	bool mdvi;
-	bool mhsyncpolarity;
-	bool mvsyncpolarity;
-	bool minterlaced;
 	bool mdataenablepolarity;
 
 	unsigned int mpixelclock;
@@ -1023,9 +1020,6 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
 	struct hdmi_vmode *vmode = &hdmi->hdmi_data.video_mode;
 	int hblank, vblank, h_de_hs, v_de_vs, hsync_len, vsync_len;
 
-	vmode->mhsyncpolarity = !!(mode->flags & DRM_MODE_FLAG_PHSYNC);
-	vmode->mvsyncpolarity = !!(mode->flags & DRM_MODE_FLAG_PVSYNC);
-	vmode->minterlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE);
 	vmode->mpixelclock = mode->clock * 1000;
 
 	dev_dbg(hdmi->dev, "final pixclk = %d\n", vmode->mpixelclock);
@@ -1035,13 +1029,13 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
 		HDMI_FC_INVIDCONF_HDCP_KEEPOUT_ACTIVE :
 		HDMI_FC_INVIDCONF_HDCP_KEEPOUT_INACTIVE);
 
-	inv_val |= (vmode->mvsyncpolarity ?
+	inv_val |= mode->flags & DRM_MODE_FLAG_PVSYNC ?
 		HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_HIGH :
-		HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_LOW);
+		HDMI_FC_INVIDCONF_VSYNC_IN_POLARITY_ACTIVE_LOW;
 
-	inv_val |= (vmode->mhsyncpolarity ?
+	inv_val |= mode->flags & DRM_MODE_FLAG_PHSYNC ?
 		HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_HIGH :
-		HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_LOW);
+		HDMI_FC_INVIDCONF_HSYNC_IN_POLARITY_ACTIVE_LOW;
 
 	inv_val |= (vmode->mdataenablepolarity ?
 		HDMI_FC_INVIDCONF_DE_IN_POLARITY_ACTIVE_HIGH :
@@ -1050,13 +1044,13 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
 	if (hdmi->vic == 39)
 		inv_val |= HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_HIGH;
 	else
-		inv_val |= (vmode->minterlaced ?
+		inv_val |= mode->flags & DRM_MODE_FLAG_INTERLACE ?
 			HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_HIGH :
-			HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_LOW);
+			HDMI_FC_INVIDCONF_R_V_BLANK_IN_OSC_ACTIVE_LOW;
 
-	inv_val |= (vmode->minterlaced ?
+	inv_val |= mode->flags & DRM_MODE_FLAG_INTERLACE ?
 		HDMI_FC_INVIDCONF_IN_I_P_INTERLACED :
-		HDMI_FC_INVIDCONF_IN_I_P_PROGRESSIVE);
+		HDMI_FC_INVIDCONF_IN_I_P_PROGRESSIVE;
 
 	inv_val |= (vmode->mdvi ?
 		HDMI_FC_INVIDCONF_DVI_MODEZ_DVI_MODE :
-- 
cgit v1.2.3


From b5814fff27c6d0212b86306bdd01fe3aea99cabb Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Fri, 27 Mar 2015 12:50:58 +0000
Subject: drm: bridge/dw_hdmi: introduce interface to setting sample rate

Introduce dw_hdmi_set_sample_rate(), which allows us to configure the
audio sample rate, setting the CTS/N values appropriately.

Tested-by: Yakir Yang <ykk@rock-chips.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 10 ++++++++++
 include/drm/bridge/dw_hdmi.h     |  5 +++++
 2 files changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index eeb01693812a..0ed8c49f1c6e 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -365,6 +365,16 @@ static void hdmi_clk_regenerator_update_pixel_clock(struct dw_hdmi *hdmi)
 	mutex_unlock(&hdmi->audio_mutex);
 }
 
+void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate)
+{
+	mutex_lock(&hdmi->audio_mutex);
+	hdmi->sample_rate = rate;
+	hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock,
+				 hdmi->sample_rate, hdmi->ratio);
+	mutex_unlock(&hdmi->audio_mutex);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_set_sample_rate);
+
 /*
  * this submodule is responsible for the video data synchronization.
  * for example, for RGB 4:4:4 input, the data map is defined as
diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index de13bfc35634..763af51e1d60 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -12,6 +12,8 @@
 
 #include <drm/drmP.h>
 
+struct dw_hdmi;
+
 enum {
 	DW_HDMI_RES_8,
 	DW_HDMI_RES_10,
@@ -59,4 +61,7 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
 		 void *data, struct drm_encoder *encoder,
 		 struct resource *iores, int irq,
 		 const struct dw_hdmi_plat_data *plat_data);
+
+void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate);
+
 #endif /* __IMX_HDMI_H__ */
-- 
cgit v1.2.3


From b90120a9660884b8f11bbb9904fbaa4c12d17e0a Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Fri, 27 Mar 2015 12:59:58 +0000
Subject: drm: bridge/dw_hdmi: introduce interfaces to enable and disable audio

iMX6 devices suffer from an errata (ERR005174) where the audio FIFO can
be emptied while it is partially full, resulting in misalignment of the
audio samples.

To prevent this, the errata workaround recommends writing N as zero
until the audio FIFO has been loaded by DMA.  Writing N=0 prevents the
HDMI bridge from reading from the audio FIFO, effectively disabling
audio.

This means we need to provide the audio driver with a pair of functions
to enable/disable audio.  These are dw_hdmi_audio_enable() and
dw_hdmi_audio_disable().

A spinlock is introduced to ensure that setting the CTS/N values can't
race, ensuring that the audio driver calling the enable/disable
functions (which are called in an atomic context) can't race with a
modeset.

Tested-by: Yakir Yang <ykk@rock-chips.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 34 +++++++++++++++++++++++++++++++++-
 include/drm/bridge/dw_hdmi.h     |  2 ++
 2 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index 0ed8c49f1c6e..f070ee07b8c9 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -18,6 +18,7 @@
 #include <linux/hdmi.h>
 #include <linux/mutex.h>
 #include <linux/of_device.h>
+#include <linux/spinlock.h>
 
 #include <drm/drm_of.h>
 #include <drm/drmP.h>
@@ -123,8 +124,12 @@ struct dw_hdmi {
 	struct i2c_adapter *ddc;
 	void __iomem *regs;
 
+	spinlock_t audio_lock;
 	struct mutex audio_mutex;
 	unsigned int sample_rate;
+	unsigned int audio_cts;
+	unsigned int audio_n;
+	bool audio_enable;
 	int ratio;
 
 	void (*write)(struct dw_hdmi *hdmi, u8 val, int offset);
@@ -346,7 +351,11 @@ static void hdmi_set_clk_regenerator(struct dw_hdmi *hdmi,
 	dev_dbg(hdmi->dev, "%s: samplerate=%ukHz ratio=%d pixelclk=%luMHz N=%d cts=%d\n",
 		__func__, sample_rate, ratio, pixel_clk, n, cts);
 
-	hdmi_set_cts_n(hdmi, cts, n);
+	spin_lock_irq(&hdmi->audio_lock);
+	hdmi->audio_n = n;
+	hdmi->audio_cts = cts;
+	hdmi_set_cts_n(hdmi, cts, hdmi->audio_enable ? n : 0);
+	spin_unlock_irq(&hdmi->audio_lock);
 }
 
 static void hdmi_init_clk_regenerator(struct dw_hdmi *hdmi)
@@ -375,6 +384,28 @@ void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate)
 }
 EXPORT_SYMBOL_GPL(dw_hdmi_set_sample_rate);
 
+void dw_hdmi_audio_enable(struct dw_hdmi *hdmi)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&hdmi->audio_lock, flags);
+	hdmi->audio_enable = true;
+	hdmi_set_cts_n(hdmi, hdmi->audio_cts, hdmi->audio_n);
+	spin_unlock_irqrestore(&hdmi->audio_lock, flags);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_audio_enable);
+
+void dw_hdmi_audio_disable(struct dw_hdmi *hdmi)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&hdmi->audio_lock, flags);
+	hdmi->audio_enable = false;
+	hdmi_set_cts_n(hdmi, hdmi->audio_cts, 0);
+	spin_unlock_irqrestore(&hdmi->audio_lock, flags);
+}
+EXPORT_SYMBOL_GPL(dw_hdmi_audio_disable);
+
 /*
  * this submodule is responsible for the video data synchronization.
  * for example, for RGB 4:4:4 input, the data map is defined as
@@ -1577,6 +1608,7 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
 	hdmi->encoder = encoder;
 
 	mutex_init(&hdmi->audio_mutex);
+	spin_lock_init(&hdmi->audio_lock);
 
 	of_property_read_u32(np, "reg-io-width", &val);
 
diff --git a/include/drm/bridge/dw_hdmi.h b/include/drm/bridge/dw_hdmi.h
index 763af51e1d60..bae79f3c4d28 100644
--- a/include/drm/bridge/dw_hdmi.h
+++ b/include/drm/bridge/dw_hdmi.h
@@ -63,5 +63,7 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
 		 const struct dw_hdmi_plat_data *plat_data);
 
 void dw_hdmi_set_sample_rate(struct dw_hdmi *hdmi, unsigned int rate);
+void dw_hdmi_audio_enable(struct dw_hdmi *hdmi);
+void dw_hdmi_audio_disable(struct dw_hdmi *hdmi);
 
 #endif /* __IMX_HDMI_H__ */
-- 
cgit v1.2.3


From d10ca826b71b4c1c3ecab846528881aa0cf24266 Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Tue, 21 Jul 2015 11:25:00 +0100
Subject: drm: bridge/dw_hdmi: remove pixel repetition setting for all VICs

dw_hdmi sets a pixel repetition factor of 1 for VICs 10-15, 25-30 and
35-38.  However, DRM uses their native resolutions in its timing
information.  For example, VIC 14 can be 1440x480 with no repetition,
or 720x480 with one pixel repetition.  As DRM uses 1440 pixels per line
for this video mode, we need no pixel repetition.

In any case, pixel repetition appears broken in dw_hdmi.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 13 +------------
 1 file changed, 1 insertion(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index f070ee07b8c9..1c0ee3476138 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -1236,18 +1236,7 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
 	else
 		hdmi->hdmi_data.colorimetry = HDMI_COLORIMETRY_ITU_709;
 
-	if ((hdmi->vic == 10) || (hdmi->vic == 11) ||
-	    (hdmi->vic == 12) || (hdmi->vic == 13) ||
-	    (hdmi->vic == 14) || (hdmi->vic == 15) ||
-	    (hdmi->vic == 25) || (hdmi->vic == 26) ||
-	    (hdmi->vic == 27) || (hdmi->vic == 28) ||
-	    (hdmi->vic == 29) || (hdmi->vic == 30) ||
-	    (hdmi->vic == 35) || (hdmi->vic == 36) ||
-	    (hdmi->vic == 37) || (hdmi->vic == 38))
-		hdmi->hdmi_data.video_mode.mpixelrepetitionoutput = 1;
-	else
-		hdmi->hdmi_data.video_mode.mpixelrepetitionoutput = 0;
-
+	hdmi->hdmi_data.video_mode.mpixelrepetitionoutput = 0;
 	hdmi->hdmi_data.video_mode.mpixelrepetitioninput = 0;
 
 	/* TODO: Get input format from IPU (via FB driver interface) */
-- 
cgit v1.2.3


From 8add41900e2177b20c28b64d13d8da8088c9606b Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Wed, 22 Jul 2015 11:14:00 +0100
Subject: drm: bridge/dw_hdmi: don't support any pixel doubled modes

As mentioned in the previous commit, the dw-hdmi driver does not support
pixel doubled modes at present; it does not configure the PLL correctly
for these modes.  Therefore, filter out the double-clocked modes as we
presently are unable to support them.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index 1c0ee3476138..8edf4c31f55c 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -1448,6 +1448,10 @@ dw_hdmi_connector_mode_valid(struct drm_connector *connector,
 					   struct dw_hdmi, connector);
 	enum drm_mode_status mode_status = MODE_OK;
 
+	/* We don't support double-clocked modes */
+	if (mode->flags & DRM_MODE_FLAG_DBLCLK)
+		return MODE_BAD;
+
 	if (hdmi->plat_data->mode_valid)
 		mode_status = hdmi->plat_data->mode_valid(connector, mode);
 
-- 
cgit v1.2.3


From 05b1342f5014b7c100834ae179dd90d1a1da7366 Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Tue, 21 Jul 2015 15:35:52 +0100
Subject: drm: bridge/dw_hdmi: clean up HDMI vs DVI mode handling

The FSL kernel detects the HDMI vendor id, and uses this to set
hdmi->edid_cfg.hdmi_cap, which is then used to set mdvi appropriately,
rather than detecting whether we are outputting a CEA mode.  Update
the dw_hdmi code to use this logic, but lets eliminate the mdvi
variable, prefering the more verbose "hdmi->sink_is_hdmi" instead.

Use the generic drm_detect_hdmi_monitor() to detect a HDMI sink.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 26 ++++++++++++--------------
 1 file changed, 12 insertions(+), 14 deletions(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index 8edf4c31f55c..fc9536b2c407 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -82,7 +82,6 @@ static const u16 csc_coeff_rgb_in_eitu709[3][4] = {
 };
 
 struct hdmi_vmode {
-	bool mdvi;
 	bool mdataenablepolarity;
 
 	unsigned int mpixelclock;
@@ -123,6 +122,7 @@ struct dw_hdmi {
 
 	struct i2c_adapter *ddc;
 	void __iomem *regs;
+	bool sink_is_hdmi;
 
 	spinlock_t audio_lock;
 	struct mutex audio_mutex;
@@ -913,11 +913,10 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi, unsigned char prep,
 static int dw_hdmi_phy_init(struct dw_hdmi *hdmi)
 {
 	int i, ret;
-	bool cscon = false;
+	bool cscon;
 
 	/*check csc whether needed activated in HDMI mode */
-	cscon = (is_color_space_conversion(hdmi) &&
-			!hdmi->hdmi_data.video_mode.mdvi);
+	cscon = hdmi->sink_is_hdmi && is_color_space_conversion(hdmi);
 
 	/* HDMI Phy spec says to do the phy initialization sequence twice */
 	for (i = 0; i < 2; i++) {
@@ -1093,9 +1092,9 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi,
 		HDMI_FC_INVIDCONF_IN_I_P_INTERLACED :
 		HDMI_FC_INVIDCONF_IN_I_P_PROGRESSIVE;
 
-	inv_val |= (vmode->mdvi ?
-		HDMI_FC_INVIDCONF_DVI_MODEZ_DVI_MODE :
-		HDMI_FC_INVIDCONF_DVI_MODEZ_HDMI_MODE);
+	inv_val |= hdmi->sink_is_hdmi ?
+		HDMI_FC_INVIDCONF_DVI_MODEZ_HDMI_MODE :
+		HDMI_FC_INVIDCONF_DVI_MODEZ_DVI_MODE;
 
 	hdmi_writeb(hdmi, inv_val, HDMI_FC_INVIDCONF);
 
@@ -1222,10 +1221,8 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
 
 	if (!hdmi->vic) {
 		dev_dbg(hdmi->dev, "Non-CEA mode used in HDMI\n");
-		hdmi->hdmi_data.video_mode.mdvi = true;
 	} else {
 		dev_dbg(hdmi->dev, "CEA mode used vic=%d\n", hdmi->vic);
-		hdmi->hdmi_data.video_mode.mdvi = false;
 	}
 
 	if ((hdmi->vic == 6) || (hdmi->vic == 7) ||
@@ -1261,10 +1258,8 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
 	dw_hdmi_enable_video_path(hdmi);
 
 	/* not for DVI mode */
-	if (hdmi->hdmi_data.video_mode.mdvi) {
-		dev_dbg(hdmi->dev, "%s DVI mode\n", __func__);
-	} else {
-		dev_dbg(hdmi->dev, "%s CEA mode\n", __func__);
+	if (hdmi->sink_is_hdmi) {
+		dev_dbg(hdmi->dev, "%s HDMI mode\n", __func__);
 
 		/* HDMI Initialization Step E - Configure audio */
 		hdmi_clk_regenerator_update_pixel_clock(hdmi);
@@ -1272,6 +1267,8 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
 
 		/* HDMI Initialization Step F - Configure AVI InfoFrame */
 		hdmi_config_AVI(hdmi, mode);
+	} else {
+		dev_dbg(hdmi->dev, "%s DVI mode\n", __func__);
 	}
 
 	hdmi_video_packetize(hdmi);
@@ -1280,7 +1277,7 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
 	hdmi_tx_hdcp_config(hdmi);
 
 	dw_hdmi_clear_overflow(hdmi);
-	if (hdmi->cable_plugin && !hdmi->hdmi_data.video_mode.mdvi)
+	if (hdmi->cable_plugin && hdmi->sink_is_hdmi)
 		hdmi_enable_overflow_interrupts(hdmi);
 
 	return 0;
@@ -1430,6 +1427,7 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
 		dev_dbg(hdmi->dev, "got edid: width[%d] x height[%d]\n",
 			edid->width_cm, edid->height_cm);
 
+		hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
 		drm_mode_connector_update_edid_property(connector, edid);
 		ret = drm_add_edid_modes(connector, edid);
 		kfree(edid);
-- 
cgit v1.2.3


From f709ec07e38a714f8a959f28b3e0388cfb1b2540 Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Tue, 21 Jul 2015 16:09:39 +0100
Subject: drm: bridge/dw_hdmi: enable audio only if sink supports audio

Only enable audio support if the sink supports audio in some form, as
defined via its EDID.  We discover this capability using the generic
drm_detect_monitor_audio() function.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index fc9536b2c407..cec5162e8e69 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -123,6 +123,7 @@ struct dw_hdmi {
 	struct i2c_adapter *ddc;
 	void __iomem *regs;
 	bool sink_is_hdmi;
+	bool sink_has_audio;
 
 	spinlock_t audio_lock;
 	struct mutex audio_mutex;
@@ -1257,13 +1258,17 @@ static int dw_hdmi_setup(struct dw_hdmi *hdmi, struct drm_display_mode *mode)
 	/* HDMI Initialization Step B.3 */
 	dw_hdmi_enable_video_path(hdmi);
 
-	/* not for DVI mode */
-	if (hdmi->sink_is_hdmi) {
-		dev_dbg(hdmi->dev, "%s HDMI mode\n", __func__);
+	if (hdmi->sink_has_audio) {
+		dev_dbg(hdmi->dev, "sink has audio support\n");
 
 		/* HDMI Initialization Step E - Configure audio */
 		hdmi_clk_regenerator_update_pixel_clock(hdmi);
 		hdmi_enable_audio_clk(hdmi);
+	}
+
+	/* not for DVI mode */
+	if (hdmi->sink_is_hdmi) {
+		dev_dbg(hdmi->dev, "%s HDMI mode\n", __func__);
 
 		/* HDMI Initialization Step F - Configure AVI InfoFrame */
 		hdmi_config_AVI(hdmi, mode);
@@ -1428,6 +1433,7 @@ static int dw_hdmi_connector_get_modes(struct drm_connector *connector)
 			edid->width_cm, edid->height_cm);
 
 		hdmi->sink_is_hdmi = drm_detect_hdmi_monitor(edid);
+		hdmi->sink_has_audio = drm_detect_monitor_audio(edid);
 		drm_mode_connector_update_edid_property(connector, edid);
 		ret = drm_add_edid_modes(connector, edid);
 		kfree(edid);
-- 
cgit v1.2.3


From 552e67859c3ae9277ed26d5393d733207d129dae Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Sat, 6 Jun 2015 11:04:00 +0100
Subject: drm: bridge/dw_hdmi: avoid enabling interface in mode_set

On a mode set, DRM makes the following sequence of calls:
* for_each_encoder
*   bridge	mode_fixup
*   encoder	mode_fixup
* crtc		mode_fixup
* for_each_encoder
*   bridge	disable
*   encoder	prepare
*   bridge	post_disable
* disable unused encoders
* crtc		prepare
* crtc		mode_set
* for_each_encoder
*   encoder	mode_set
*   bridge	mode_set
* crtc		commit
* for_each_encoder
*   bridge	pre_enable
*   encoder	commit
*   bridge	enable

dw_hdmi enables the HDMI output in both the bridge mode_set() and also
the bridge enable() step.  This is duplicated work - we can avoid the
setup in mode_set() and just do it in the enable() stage.  This
simplifies the code a little.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index cec5162e8e69..8efd61781f89 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -1375,8 +1375,6 @@ static void dw_hdmi_bridge_mode_set(struct drm_bridge *bridge,
 {
 	struct dw_hdmi *hdmi = bridge->driver_private;
 
-	dw_hdmi_setup(hdmi, mode);
-
 	/* Store the display mode for plugin/DKMS poweron events */
 	memcpy(&hdmi->previous_mode, mode, sizeof(hdmi->previous_mode));
 }
-- 
cgit v1.2.3


From 2fada109cfb7dbfd52f472140d6477a27a1f0d6d Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Tue, 28 Jul 2015 12:21:34 +0100
Subject: drm: bridge/dw_hdmi: rename dw_hdmi_phy_enable_power()

dw_hdmi_phy_enable_power() is not about enabling and disabling power.
It is about allowing or preventing power-down mode being entered - the
register is documented as "Power-down enable (active low 0b)."

This can be seen as the bit has no effect when the HDMI phy is
operational on iMX6 hardware.

Rename the function to dw_hdmi_phy_enable_powerdown() to reflect the
documentation, make it take a bool for the 'enable' argument, and invert
the value to be written.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index 8efd61781f89..cef31d5cacb3 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -737,9 +737,9 @@ static int hdmi_phy_i2c_write(struct dw_hdmi *hdmi, unsigned short data,
 	return 0;
 }
 
-static void dw_hdmi_phy_enable_power(struct dw_hdmi *hdmi, u8 enable)
+static void dw_hdmi_phy_enable_powerdown(struct dw_hdmi *hdmi, bool enable)
 {
-	hdmi_mask_writeb(hdmi, enable, HDMI_PHY_CONF0,
+	hdmi_mask_writeb(hdmi, !enable, HDMI_PHY_CONF0,
 			 HDMI_PHY_CONF0_PDZ_OFFSET,
 			 HDMI_PHY_CONF0_PDZ_MASK);
 }
@@ -879,7 +879,7 @@ static int hdmi_phy_configure(struct dw_hdmi *hdmi, unsigned char prep,
 	/* REMOVE CLK TERM */
 	hdmi_phy_i2c_write(hdmi, 0x8000, 0x05);  /* CKCALCTRL */
 
-	dw_hdmi_phy_enable_power(hdmi, 1);
+	dw_hdmi_phy_enable_powerdown(hdmi, false);
 
 	/* toggle TMDS enable */
 	dw_hdmi_phy_enable_tmds(hdmi, 0);
@@ -924,7 +924,7 @@ static int dw_hdmi_phy_init(struct dw_hdmi *hdmi)
 		dw_hdmi_phy_sel_data_en_pol(hdmi, 1);
 		dw_hdmi_phy_sel_interface_control(hdmi, 0);
 		dw_hdmi_phy_enable_tmds(hdmi, 0);
-		dw_hdmi_phy_enable_power(hdmi, 0);
+		dw_hdmi_phy_enable_powerdown(hdmi, true);
 
 		/* Enable CSC */
 		ret = hdmi_phy_configure(hdmi, 0, 8, cscon);
@@ -1141,7 +1141,7 @@ static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi)
 		return;
 
 	dw_hdmi_phy_enable_tmds(hdmi, 0);
-	dw_hdmi_phy_enable_power(hdmi, 0);
+	dw_hdmi_phy_enable_powerdown(hdmi, true);
 
 	hdmi->phy_enabled = false;
 }
-- 
cgit v1.2.3


From b872a8e16b3fb17c3fe1e97f4ed0803f4a740aae Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@arm.linux.org.uk>
Date: Fri, 5 Jun 2015 12:22:46 +0100
Subject: drm: bridge/dw_hdmi: fix phy enable/disable handling

The dw_hdmi enable/disable handling is particularly weak in several
regards:
* The hotplug interrupt could call hdmi_poweron() or hdmi_poweroff()
  while DRM is setting a mode, which could race with a mode being set.
* Hotplug will always re-enable the phy whenever it detects an active
  hotplug signal, even if DRM has disabled the output.

Resolve all of these by introducing a mutex to prevent races, and a
state-tracking bool so we know whether DRM wishes the output to be
enabled.  We choose to use our own mutex rather than ->struct_mutex
so that we can still process interrupts in a timely fashion.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 29 ++++++++++++++++++++++-------
 1 file changed, 22 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index cef31d5cacb3..c5c4553258b6 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -125,6 +125,9 @@ struct dw_hdmi {
 	bool sink_is_hdmi;
 	bool sink_has_audio;
 
+	struct mutex mutex;		/* for state below and previous_mode */
+	bool disabled;			/* DRM has disabled our bridge */
+
 	spinlock_t audio_lock;
 	struct mutex audio_mutex;
 	unsigned int sample_rate;
@@ -1375,8 +1378,12 @@ static void dw_hdmi_bridge_mode_set(struct drm_bridge *bridge,
 {
 	struct dw_hdmi *hdmi = bridge->driver_private;
 
+	mutex_lock(&hdmi->mutex);
+
 	/* Store the display mode for plugin/DKMS poweron events */
 	memcpy(&hdmi->previous_mode, mode, sizeof(hdmi->previous_mode));
+
+	mutex_unlock(&hdmi->mutex);
 }
 
 static bool dw_hdmi_bridge_mode_fixup(struct drm_bridge *bridge,
@@ -1390,14 +1397,20 @@ static void dw_hdmi_bridge_disable(struct drm_bridge *bridge)
 {
 	struct dw_hdmi *hdmi = bridge->driver_private;
 
+	mutex_lock(&hdmi->mutex);
+	hdmi->disabled = true;
 	dw_hdmi_poweroff(hdmi);
+	mutex_unlock(&hdmi->mutex);
 }
 
 static void dw_hdmi_bridge_enable(struct drm_bridge *bridge)
 {
 	struct dw_hdmi *hdmi = bridge->driver_private;
 
+	mutex_lock(&hdmi->mutex);
 	dw_hdmi_poweron(hdmi);
+	hdmi->disabled = false;
+	mutex_unlock(&hdmi->mutex);
 }
 
 static void dw_hdmi_bridge_nop(struct drm_bridge *bridge)
@@ -1520,20 +1533,20 @@ static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
 	phy_int_pol = hdmi_readb(hdmi, HDMI_PHY_POL0);
 
 	if (intr_stat & HDMI_IH_PHY_STAT0_HPD) {
+		hdmi_modb(hdmi, ~phy_int_pol, HDMI_PHY_HPD, HDMI_PHY_POL0);
+		mutex_lock(&hdmi->mutex);
 		if (phy_int_pol & HDMI_PHY_HPD) {
 			dev_dbg(hdmi->dev, "EVENT=plugin\n");
 
-			hdmi_modb(hdmi, 0, HDMI_PHY_HPD, HDMI_PHY_POL0);
-
-			dw_hdmi_poweron(hdmi);
+			if (!hdmi->disabled)
+				dw_hdmi_poweron(hdmi);
 		} else {
 			dev_dbg(hdmi->dev, "EVENT=plugout\n");
 
-			hdmi_modb(hdmi, HDMI_PHY_HPD, HDMI_PHY_HPD,
-				  HDMI_PHY_POL0);
-
-			dw_hdmi_poweroff(hdmi);
+			if (!hdmi->disabled)
+				dw_hdmi_poweroff(hdmi);
 		}
+		mutex_unlock(&hdmi->mutex);
 		drm_helper_hpd_irq_event(hdmi->bridge->dev);
 	}
 
@@ -1601,7 +1614,9 @@ int dw_hdmi_bind(struct device *dev, struct device *master,
 	hdmi->sample_rate = 48000;
 	hdmi->ratio = 100;
 	hdmi->encoder = encoder;
+	hdmi->disabled = true;
 
+	mutex_init(&hdmi->mutex);
 	mutex_init(&hdmi->audio_mutex);
 	spin_lock_init(&hdmi->audio_lock);
 
-- 
cgit v1.2.3


From 6dc2e1bf8e0025db2ff8a35ee3e0bd88203d4402 Mon Sep 17 00:00:00 2001
From: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Date: Mon, 18 May 2015 15:32:20 +0300
Subject: drm: bridge/dw_hdmi: fix register I2CM_ADDRESS register name

I2CM_ADDRESS became a MESS, fix it, also change guarding define
to __DW_HDMI_H__ , since the driver is not IMX specific.

Signed-off-by: Vladimir Zapolskiy <vladimir_zapolskiy@mentor.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.h b/drivers/gpu/drm/bridge/dw_hdmi.h
index 175dbc89a824..ee7f7ed2ab12 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.h
+++ b/drivers/gpu/drm/bridge/dw_hdmi.h
@@ -7,8 +7,8 @@
  * (at your option) any later version.
  */
 
-#ifndef __IMX_HDMI_H__
-#define __IMX_HDMI_H__
+#ifndef __DW_HDMI_H__
+#define __DW_HDMI_H__
 
 /* Identification Registers */
 #define HDMI_DESIGN_ID                          0x0000
@@ -525,7 +525,7 @@
 
 /* I2C Master Registers (E-DDC) */
 #define HDMI_I2CM_SLAVE                         0x7E00
-#define HDMI_I2CMESS                            0x7E01
+#define HDMI_I2CM_ADDRESS                       0x7E01
 #define HDMI_I2CM_DATAO                         0x7E02
 #define HDMI_I2CM_DATAI                         0x7E03
 #define HDMI_I2CM_OPERATION                     0x7E04
@@ -1031,4 +1031,4 @@ enum {
 	HDMI_A_VIDPOLCFG_HSYNCPOL_ACTIVE_LOW = 0x0,
 };
 
-#endif /* __IMX_HDMI_H__ */
+#endif /* __DW_HDMI_H__ */
-- 
cgit v1.2.3