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Fri, 14 Mar 2025 07:33:23 -0700 (PDT) From: srinivas.kandagatla@linaro.org To: broonie@kernel.org Cc: perex@perex.cz, tiwai@suse.com, krzysztof.kozlowski@linaro.org, linux-sound@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, dmitry.baryshkov@linaro.org, johan+linaro@kernel.org, Srinivas Kandagatla Subject: [PATCH v4 2/5] ASoC: q6apm: add q6apm_get_hw_pointer helper Date: Fri, 14 Mar 2025 14:32:17 +0000 Message-Id: <20250314143220.6215-3-srinivas.kandagatla@linaro.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250314143220.6215-1-srinivas.kandagatla@linaro.org> References: <20250314143220.6215-1-srinivas.kandagatla@linaro.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Srinivas Kandagatla Implement an helper function in q6apm to be able to read the current hardware pointer for both read and write buffers. This should help q6apm-dai to get the hardware pointer consistently without it doing manual calculation, which could go wrong in some race conditions. Fixes: 9b4fe0f1cd79 ("ASoC: qdsp6: audioreach: add q6apm-dai support") Signed-off-by: Srinivas Kandagatla Tested-by: Krzysztof Kozlowski --- sound/soc/qcom/qdsp6/q6apm.c | 18 +++++++++++++++++- sound/soc/qcom/qdsp6/q6apm.h | 3 +++ 2 files changed, 20 insertions(+), 1 deletion(-) diff --git a/sound/soc/qcom/qdsp6/q6apm.c b/sound/soc/qcom/qdsp6/q6apm.c index 2a2a5bd98110..ca57413cb784 100644 --- a/sound/soc/qcom/qdsp6/q6apm.c +++ b/sound/soc/qcom/qdsp6/q6apm.c @@ -494,6 +494,19 @@ int q6apm_read(struct q6apm_graph *graph) } EXPORT_SYMBOL_GPL(q6apm_read); =20 +int q6apm_get_hw_pointer(struct q6apm_graph *graph, int dir) +{ + struct audioreach_graph_data *data; + + if (dir =3D=3D SNDRV_PCM_STREAM_PLAYBACK) + data =3D &graph->rx_data; + else + data =3D &graph->tx_data; + + return (int)atomic_read(&data->hw_ptr); +} +EXPORT_SYMBOL_GPL(q6apm_get_hw_pointer); + static int graph_callback(struct gpr_resp_pkt *data, void *priv, int op) { struct data_cmd_rsp_rd_sh_mem_ep_data_buffer_done_v2 *rd_done; @@ -520,7 +533,8 @@ static int graph_callback(struct gpr_resp_pkt *data, vo= id *priv, int op) done =3D data->payload; phys =3D graph->rx_data.buf[token].phys; mutex_unlock(&graph->lock); - + /* token numbering starts at 0 */ + atomic_set(&graph->rx_data.hw_ptr, token + 1); if (lower_32_bits(phys) =3D=3D done->buf_addr_lsw && upper_32_bits(phys) =3D=3D done->buf_addr_msw) { graph->result.opcode =3D hdr->opcode; @@ -553,6 +567,8 @@ static int graph_callback(struct gpr_resp_pkt *data, vo= id *priv, int op) rd_done =3D data->payload; phys =3D graph->tx_data.buf[hdr->token].phys; mutex_unlock(&graph->lock); + /* token numbering starts at 0 */ + atomic_set(&graph->tx_data.hw_ptr, hdr->token + 1); =20 if (upper_32_bits(phys) =3D=3D rd_done->buf_addr_msw && lower_32_bits(phys) =3D=3D rd_done->buf_addr_lsw) { diff --git a/sound/soc/qcom/qdsp6/q6apm.h b/sound/soc/qcom/qdsp6/q6apm.h index c248c8d2b1ab..7ce08b401e31 100644 --- a/sound/soc/qcom/qdsp6/q6apm.h +++ b/sound/soc/qcom/qdsp6/q6apm.h @@ -2,6 +2,7 @@ #ifndef __Q6APM_H__ #define __Q6APM_H__ #include +#include #include #include #include @@ -77,6 +78,7 @@ struct audioreach_graph_data { uint32_t num_periods; uint32_t dsp_buf; uint32_t mem_map_handle; + atomic_t hw_ptr; }; =20 struct audioreach_graph { @@ -150,4 +152,5 @@ int q6apm_enable_compress_module(struct device *dev, st= ruct q6apm_graph *graph, int q6apm_remove_initial_silence(struct device *dev, struct q6apm_graph *g= raph, uint32_t samples); int q6apm_remove_trailing_silence(struct device *dev, struct q6apm_graph *= graph, uint32_t samples); int q6apm_set_real_module_id(struct device *dev, struct q6apm_graph *graph= , uint32_t codec_id); +int q6apm_get_hw_pointer(struct q6apm_graph *graph, int dir); #endif /* __APM_GRAPH_ */ --=20 2.39.2