ASoC: qcom: Fix typo error in HDMI regmap config callbacks

[ Upstream commit e681b1a ]

Had a typo in lpass platform driver that resulted in crash
during suspend/resume with an HDMI dongle connected.

The regmap read/write/volatile regesters validation callbacks in lpass-cpu
were using MI2S rdma_channels count instead of hdmi_rdma_channels.

This typo error causing to read registers from the regmap beyond the length
of the mapping created by ioremap().

This fix avoids the need for reducing number hdmi_rdma_channels,
which is done in
commit 7dfe20e ("ASoC: qcom: Fix number of HDMI RDMA channels on sc7180").
So reverting the same.

Fixes: 7cb37b7 ("ASoC: qcom: Add support for lpass hdmi driver")
Signed-off-by: Srinivasa Rao Mandadapu <srivasam@codeaurora.org>
Link: https://lore.kernel.org/r/20210202062727.22469-1-srivasam@codeaurora.org
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

sound/soc/qcom/lpass-cpu.c

@@ -594,7 +594,7 @@ static bool lpass_hdmi_regmap_writeable(struct device *dev, unsigned int reg)
 			return true;
 	}
 
-	for (i = 0; i < v->rdma_channels; ++i) {
+	for (i = 0; i < v->hdmi_rdma_channels; ++i) {
 		if (reg == LPAIF_HDMI_RDMACTL_REG(v, i))
 			return true;
 		if (reg == LPAIF_HDMI_RDMABASE_REG(v, i))
@@ -640,7 +640,7 @@ static bool lpass_hdmi_regmap_readable(struct device *dev, unsigned int reg)
 	if (reg == LPASS_HDMITX_APP_IRQSTAT_REG(v))
 		return true;
 
-	for (i = 0; i < v->rdma_channels; ++i) {
+	for (i = 0; i < v->hdmi_rdma_channels; ++i) {
 		if (reg == LPAIF_HDMI_RDMACTL_REG(v, i))
 			return true;
 		if (reg == LPAIF_HDMI_RDMABASE_REG(v, i))
@@ -667,7 +667,7 @@ static bool lpass_hdmi_regmap_volatile(struct device *dev, unsigned int reg)
 	if (reg == LPASS_HDMI_TX_LEGACY_ADDR(v))
 		return true;
 
-	for (i = 0; i < v->rdma_channels; ++i) {
+	for (i = 0; i < v->hdmi_rdma_channels; ++i) {
 		if (reg == LPAIF_HDMI_RDMACURR_REG(v, i))
 			return true;
 	}
@@ -817,7 +817,7 @@ int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev)
 		}
 
 		lpass_hdmi_regmap_config.max_register = LPAIF_HDMI_RDMAPER_REG(variant,
-					variant->hdmi_rdma_channels);
+					variant->hdmi_rdma_channels - 1);
 		drvdata->hdmiif_map = devm_regmap_init_mmio(dev, drvdata->hdmiif,
 					&lpass_hdmi_regmap_config);
 		if (IS_ERR(drvdata->hdmiif_map)) {