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Wed, 19 Aug 2020 12:32:26 +0000 (GMT) From: =?utf-8?q?=C5=81ukasz_Stelmach?= To: Kukjin Kim , Krzysztof Kozlowski , Andi Shyti , Mark Brown , linux-spi@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: m.szyprowski@samsung.com, b.zolnierkie@samsung.com, =?utf-8?q?=C5=81ukas?= =?utf-8?q?z_Stelmach?= Subject: [PATCH 3/8] spi: spi-s3c64xx: Report more information when errors occur Date: Wed, 19 Aug 2020 14:32:03 +0200 Message-Id: <20200819123208.12337-4-l.stelmach@samsung.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200819123208.12337-1-l.stelmach@samsung.com> MIME-Version: 1.0 Organization: Samsung R&D Institute Poland X-Brightmail-Tracker: H4sIAAAAAAAAA01SfSyUcRzf757nnnscp8ex+Y5K3eqP5KW32WNonRr3V2v9U2y5rjwd6+7o HkRrKC2y8zIvkawUxizhHC6Z1dUQuSu2ZIVulJJMoXG11N3D8t/n9/u8fD/f334kJm7ie5Hx miRGq1GoJIQQb+9Zsfi/8w6T7xlbFNLVy9M8uqW8iU+XWqcIumDyK0ZbLM0CetRUj2j95Bs+ PdxZSdDllm4efeX7qIBufD4mOOQsG6n5gcn0DTcIWWtNhizf0IBkC/qtx/jRwtBYRhWfwmgD D54Wxlm7p/DEfip14aeBn4lKRbnIiQTqAFTZOni5SEiKqXoEtY/H+dxhEcHyyJM1ZgHBSE4e lotIh2VuzsvuFlN1CJ4uRXKaaQT14724nSAoKRTU9jmSPKhCHljNs4SdwKhk0D0yObA7dRxW 2/oEdoxTO6G8a55nxyIqBAZWDAKunw9k13U49E5UKFhtJQSncYMXt6YcwzZRvvDg6gjO5ftA VtttjPOaBTBfJ+XwETB/shIcdoeZ3vX8zTBQrMO5xTKguCjI3hkoHYL2ymWc04TAe7ONsGsw ahc0dQZy11KoNt5CnNUV3n5z4xq4QlF72dpTiSDnuphT74CHBV1rgV6QN1OPCpGkYsMuFRv6 V/yfVYWwBuTJJLNqJcPu0zAXA1iFmk3WKAPOJqj16N83GvjTu2hEnb/PmBBFIomLKNUcIhfz FSlsmtqEgMQkHqLwwYEYsShWkXaJ0SbItckqhjUhbxKXeIr23/9ySkwpFUnMeYZJZLTrLI90 8spEjeHS9KroYOnkh+lWf2X/tYKhEltYoltAUJyv7WSN8cJ89mXVbsUviEwxbYt5FVV6Z7Yy 6vXne2oki9uuy282ZER8xLMjysYYZ/ms9AQRNCqNNQ61PjNvyThXEWZkb4LGL2nYbdXlZfVE 8IRzS9Tho7almcFev6y69Ls9bTpvCc7GKfb6YlpW8Rd2tasGQgMAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrAIsWRmVeSWpSXmKPExsVy+t/xu7q3pG3jDdbOMLJY/OM5k8XGGetZ LaY+fMJm0f/4NbPF+fMb2C1uHlrBaLHp8TVWi8u75rBZzDi/j8mi8eNNdou1R+6yO3B7XF/y idlj06pONo/NS+o9+rasYvT4vEkugDVKz6Yov7QkVSEjv7jEVina0MJIz9DSQs/IxFLP0Ng8 1srIVEnfziYlNSezLLVI3y5BL+PhvicsBacEKj5/28LawDiVt4uRg0NCwETi3TupLkYuDiGB pYwSl3ctZ4aIS0msnJvexcgJZApL/LnWxQZR85RRYt+BeywgCTYBR4n+pSdYQRIiAjOYJJ7c mMwKkmAWKJe4NOs5O8ggYYEAiQMNqiBhFgFViRl7PjCB2LwC1hKnf25hh1ggL9G+fDsbiM0p YCPx8NcUMFsIqKZr8UKoekGJkzOfsICMZBZQl1g/TwgkzC+gJbGm6ToLxFZ5ieats5knMArN QtIxC6FjFpKqBYzMqxhFUkuLc9Nzi430ihNzi0vz0vWS83M3MQJjb9uxn1t2MHa9Cz7EKMDB qMTDW3HOOl6INbGsuDL3EKMEB7OSCK/T2dNxQrwpiZVVqUX58UWlOanFhxhNgd6cyCwlmpwP TAt5JfGGpobmFpaG5sbmxmYWSuK8HQIHY4QE0hNLUrNTUwtSi2D6mDg4pRoYdx6W/yCQYVah /NIvRlsgOixKUvFHwg/R7dtEMra0Tu/h+h36V/3hlt8fJy1PeHDsztxzxXM9XBTyWg+vZBWQ vjRd9vwxz+TE3+0Lk1IOPwr88UQuZOUM6zlG5yyu3NvSuVjmX9IlqVNB85+735n1MPLsrW1H H06+kyha/sfzwA/njLatq+N9C5RYijMSDbWYi4oTASYPkNHTAgAA X-CMS-MailID: 20200819123226eucas1p2dc50cd60f71f2155524ec21bf4dcdd74 X-Msg-Generator: CA X-RootMTR: 20200819123226eucas1p2dc50cd60f71f2155524ec21bf4dcdd74 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20200819123226eucas1p2dc50cd60f71f2155524ec21bf4dcdd74 References: <20200819123208.12337-1-l.stelmach@samsung.com> Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org Report amount of pending data when a transfer stops due to errors. Report if DMA was used to transfer data and print the status code. Signed-off-by: Łukasz Stelmach Reviewed-by: Krzysztof Kozlowski --- drivers/spi/spi-s3c64xx.c | 22 +++++++++++++++++----- 1 file changed, 17 insertions(+), 5 deletions(-) diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index 8fe44451d303..4ab68cd1b821 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -122,6 +122,7 @@ struct s3c64xx_spi_dma_data { struct dma_chan *ch; + dma_cookie_t cookie; enum dma_transfer_direction direction; }; @@ -297,7 +298,7 @@ static void prepare_dma(struct s3c64xx_spi_dma_data *dma, desc->callback = s3c64xx_spi_dmacb; desc->callback_param = dma; - dmaengine_submit(desc); + dma->cookie = dmaengine_submit(desc); dma_async_issue_pending(dma->ch); } @@ -692,17 +693,28 @@ static int s3c64xx_spi_transfer_one(struct spi_master *master, if (status) { dev_err(&spi->dev, - "I/O Error: rx-%d tx-%d res:rx-%c tx-%c len-%d\n", + "I/O Error: rx-%d tx-%d rx-%c tx-%c len-%d dma-%d res-(%d)\n", xfer->rx_buf ? 1 : 0, xfer->tx_buf ? 1 : 0, (sdd->state & RXBUSY) ? 'f' : 'p', (sdd->state & TXBUSY) ? 'f' : 'p', - xfer->len); + xfer->len, use_dma ? 1 : 0, status); if (use_dma) { - if (xfer->tx_buf && (sdd->state & TXBUSY)) + struct dma_tx_state s; + + if (xfer->tx_buf && (sdd->state & TXBUSY)) { + dmaengine_pause(sdd->tx_dma.ch); + dmaengine_tx_status(sdd->tx_dma.ch, sdd->tx_dma.cookie, &s); dmaengine_terminate_all(sdd->tx_dma.ch); - if (xfer->rx_buf && (sdd->state & RXBUSY)) + dev_err(&spi->dev, "TX residue: %d\n", s.residue); + + } + if (xfer->rx_buf && (sdd->state & RXBUSY)) { + dmaengine_pause(sdd->rx_dma.ch); + dmaengine_tx_status(sdd->rx_dma.ch, sdd->rx_dma.cookie, &s); dmaengine_terminate_all(sdd->rx_dma.ch); + dev_err(&spi->dev, "RX residue: %d\n", s.residue); + } } } else { s3c64xx_flush_fifo(sdd);