Hi Tomi,
Thank you for the patch.
On Tue, Dec 08, 2020 at 02:28:36PM +0200, Tomi Valkeinen wrote:
> The "channel" usage in omap dsi driver is confusing. We have three
> different "channels":
>
> 1) DSI virtual channel ID. This is a number from 0 to 3, included in the
> packet payload.
>
> 2) VC. This is a register block in the DSI IP. There are four of those
> blocks. A VC is a DSI "pipeline", with defined fifo settings, data
> source (cpu or dispc), and some other settings. It has no relation to
> the 1).
>
> 3) dispc channel. It's the "pipeline" number dispc uses to send pixel
> data.
>
> The previous patch handled the third case.
>
> To start fixing 1) and 2), we first rename all uses of 'channel' to
> 'vc', as in most of the cases that is the correct thing to use.
>
> However, in some places 1) and 2) have gotten mixed up (i.e. the code
> uses msg->channel when it should use vc), which will be fixed in the
> following patch.
>
> Note that mixing 1) and 2) currently is "fine", as at the moment we only
> support DSI peripherals with DSI virtual channel 0, and we always use
> VC0 to send data. So both 1) and 2) are always 0.
>
> Signed-off-by: Tomi Valkeinen <tomi.valkei...@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
> ---
> drivers/gpu/drm/omapdrm/dss/dsi.c | 220 +++++++++++++++---------------
> 1 file changed, 110 insertions(+), 110 deletions(-)
>
> diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c
> b/drivers/gpu/drm/omapdrm/dss/dsi.c
> index cf0dc4872d14..273159e8f992 100644
> --- a/drivers/gpu/drm/omapdrm/dss/dsi.c
> +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
> @@ -214,7 +214,7 @@ static void dsi_set_ulps_auto(struct dsi_data *dsi, bool
> enable);
> static int dsi_display_init_dispc(struct dsi_data *dsi);
> static void dsi_display_uninit_dispc(struct dsi_data *dsi);
>
> -static int dsi_vc_send_null(struct dsi_data *dsi, int channel);
> +static int dsi_vc_send_null(struct dsi_data *dsi, int vc);
>
> static ssize_t _omap_dsi_host_transfer(struct dsi_data *dsi,
> const struct mipi_dsi_msg *msg);
> @@ -376,7 +376,7 @@ struct dsi_data {
> /* space for a copy used by the interrupt handler */
> struct dsi_isr_tables isr_tables_copy;
>
> - int update_channel;
> + int update_vc;
> #ifdef DSI_PERF_MEASURE
> unsigned int update_bytes;
> #endif
> @@ -639,7 +639,7 @@ static void print_irq_status(u32 status)
> #undef PIS
> }
>
> -static void print_irq_status_vc(int channel, u32 status)
> +static void print_irq_status_vc(int vc, u32 status)
> {
> if (status == 0)
> return;
> @@ -650,7 +650,7 @@ static void print_irq_status_vc(int channel, u32 status)
> #define PIS(x) (status & DSI_VC_IRQ_##x) ? (#x " ") : ""
>
> pr_debug("DSI VC(%d) IRQ 0x%x: %s%s%s%s%s%s%s%s%s\n",
> - channel,
> + vc,
> status,
> PIS(CS),
> PIS(ECC_CORR),
> @@ -1031,7 +1031,7 @@ static int dsi_unregister_isr(struct dsi_data *dsi,
> omap_dsi_isr_t isr,
> return r;
> }
>
> -static int dsi_register_isr_vc(struct dsi_data *dsi, int channel,
> +static int dsi_register_isr_vc(struct dsi_data *dsi, int vc,
> omap_dsi_isr_t isr, void *arg, u32 mask)
> {
> unsigned long flags;
> @@ -1040,18 +1040,18 @@ static int dsi_register_isr_vc(struct dsi_data *dsi,
> int channel,
> spin_lock_irqsave(&dsi->irq_lock, flags);
>
> r = _dsi_register_isr(isr, arg, mask,
> - dsi->isr_tables.isr_table_vc[channel],
> - ARRAY_SIZE(dsi->isr_tables.isr_table_vc[channel]));
> + dsi->isr_tables.isr_table_vc[vc],
> + ARRAY_SIZE(dsi->isr_tables.isr_table_vc[vc]));
>
> if (r == 0)
> - _omap_dsi_set_irqs_vc(dsi, channel);
> + _omap_dsi_set_irqs_vc(dsi, vc);
>
> spin_unlock_irqrestore(&dsi->irq_lock, flags);
>
> return r;
> }
>
> -static int dsi_unregister_isr_vc(struct dsi_data *dsi, int channel,
> +static int dsi_unregister_isr_vc(struct dsi_data *dsi, int vc,
> omap_dsi_isr_t isr, void *arg, u32 mask)
> {
> unsigned long flags;
> @@ -1060,11 +1060,11 @@ static int dsi_unregister_isr_vc(struct dsi_data
> *dsi, int channel,
> spin_lock_irqsave(&dsi->irq_lock, flags);
>
> r = _dsi_unregister_isr(isr, arg, mask,
> - dsi->isr_tables.isr_table_vc[channel],
> - ARRAY_SIZE(dsi->isr_tables.isr_table_vc[channel]));
> + dsi->isr_tables.isr_table_vc[vc],
> + ARRAY_SIZE(dsi->isr_tables.isr_table_vc[vc]));
>
> if (r == 0)
> - _omap_dsi_set_irqs_vc(dsi, channel);
> + _omap_dsi_set_irqs_vc(dsi, vc);
>
> spin_unlock_irqrestore(&dsi->irq_lock, flags);
>
> @@ -2232,9 +2232,9 @@ static int dsi_force_tx_stop_mode_io(struct dsi_data
> *dsi)
> return 0;
> }
>
> -static bool dsi_vc_is_enabled(struct dsi_data *dsi, int channel)
> +static bool dsi_vc_is_enabled(struct dsi_data *dsi, int vc)
> {
> - return REG_GET(dsi, DSI_VC_CTRL(channel), 0, 0);
> + return REG_GET(dsi, DSI_VC_CTRL(vc), 0, 0);
> }
>
> static void dsi_packet_sent_handler_vp(void *data, u32 mask)
> @@ -2242,14 +2242,14 @@ static void dsi_packet_sent_handler_vp(void *data,
> u32 mask)
> struct dsi_packet_sent_handler_data *vp_data =
> (struct dsi_packet_sent_handler_data *) data;
> struct dsi_data *dsi = vp_data->dsi;
> - const int channel = dsi->update_channel;
> + const int vc = dsi->update_vc;
> u8 bit = dsi->te_enabled ? 30 : 31;
>
> - if (REG_GET(dsi, DSI_VC_TE(channel), bit, bit) == 0)
> + if (REG_GET(dsi, DSI_VC_TE(vc), bit, bit) == 0)
> complete(vp_data->completion);
> }
>
> -static int dsi_sync_vc_vp(struct dsi_data *dsi, int channel)
> +static int dsi_sync_vc_vp(struct dsi_data *dsi, int vc)
> {
> DECLARE_COMPLETION_ONSTACK(completion);
> struct dsi_packet_sent_handler_data vp_data = {
> @@ -2261,13 +2261,13 @@ static int dsi_sync_vc_vp(struct dsi_data *dsi, int
> channel)
>
> bit = dsi->te_enabled ? 30 : 31;
>
> - r = dsi_register_isr_vc(dsi, channel, dsi_packet_sent_handler_vp,
> + r = dsi_register_isr_vc(dsi, vc, dsi_packet_sent_handler_vp,
> &vp_data, DSI_VC_IRQ_PACKET_SENT);
> if (r)
> goto err0;
>
> /* Wait for completion only if TE_EN/TE_START is still set */
> - if (REG_GET(dsi, DSI_VC_TE(channel), bit, bit)) {
> + if (REG_GET(dsi, DSI_VC_TE(vc), bit, bit)) {
> if (wait_for_completion_timeout(&completion,
> msecs_to_jiffies(10)) == 0) {
> DSSERR("Failed to complete previous frame transfer\n");
> @@ -2276,12 +2276,12 @@ static int dsi_sync_vc_vp(struct dsi_data *dsi, int
> channel)
> }
> }
>
> - dsi_unregister_isr_vc(dsi, channel, dsi_packet_sent_handler_vp,
> + dsi_unregister_isr_vc(dsi, vc, dsi_packet_sent_handler_vp,
> &vp_data, DSI_VC_IRQ_PACKET_SENT);
>
> return 0;
> err1:
> - dsi_unregister_isr_vc(dsi, channel, dsi_packet_sent_handler_vp,
> + dsi_unregister_isr_vc(dsi, vc, dsi_packet_sent_handler_vp,
> &vp_data, DSI_VC_IRQ_PACKET_SENT);
> err0:
> return r;
> @@ -2292,13 +2292,13 @@ static void dsi_packet_sent_handler_l4(void *data,
> u32 mask)
> struct dsi_packet_sent_handler_data *l4_data =
> (struct dsi_packet_sent_handler_data *) data;
> struct dsi_data *dsi = l4_data->dsi;
> - const int channel = dsi->update_channel;
> + const int vc = dsi->update_vc;
>
> - if (REG_GET(dsi, DSI_VC_CTRL(channel), 5, 5) == 0)
> + if (REG_GET(dsi, DSI_VC_CTRL(vc), 5, 5) == 0)
> complete(l4_data->completion);
> }
>
> -static int dsi_sync_vc_l4(struct dsi_data *dsi, int channel)
> +static int dsi_sync_vc_l4(struct dsi_data *dsi, int vc)
> {
> DECLARE_COMPLETION_ONSTACK(completion);
> struct dsi_packet_sent_handler_data l4_data = {
> @@ -2307,13 +2307,13 @@ static int dsi_sync_vc_l4(struct dsi_data *dsi, int
> channel)
> };
> int r = 0;
>
> - r = dsi_register_isr_vc(dsi, channel, dsi_packet_sent_handler_l4,
> + r = dsi_register_isr_vc(dsi, vc, dsi_packet_sent_handler_l4,
> &l4_data, DSI_VC_IRQ_PACKET_SENT);
> if (r)
> goto err0;
>
> /* Wait for completion only if TX_FIFO_NOT_EMPTY is still set */
> - if (REG_GET(dsi, DSI_VC_CTRL(channel), 5, 5)) {
> + if (REG_GET(dsi, DSI_VC_CTRL(vc), 5, 5)) {
> if (wait_for_completion_timeout(&completion,
> msecs_to_jiffies(10)) == 0) {
> DSSERR("Failed to complete previous l4 transfer\n");
> @@ -2322,47 +2322,47 @@ static int dsi_sync_vc_l4(struct dsi_data *dsi, int
> channel)
> }
> }
>
> - dsi_unregister_isr_vc(dsi, channel, dsi_packet_sent_handler_l4,
> + dsi_unregister_isr_vc(dsi, vc, dsi_packet_sent_handler_l4,
> &l4_data, DSI_VC_IRQ_PACKET_SENT);
>
> return 0;
> err1:
> - dsi_unregister_isr_vc(dsi, channel, dsi_packet_sent_handler_l4,
> + dsi_unregister_isr_vc(dsi, vc, dsi_packet_sent_handler_l4,
> &l4_data, DSI_VC_IRQ_PACKET_SENT);
> err0:
> return r;
> }
>
> -static int dsi_sync_vc(struct dsi_data *dsi, int channel)
> +static int dsi_sync_vc(struct dsi_data *dsi, int vc)
> {
> WARN_ON(!dsi_bus_is_locked(dsi));
>
> WARN_ON(in_interrupt());
>
> - if (!dsi_vc_is_enabled(dsi, channel))
> + if (!dsi_vc_is_enabled(dsi, vc))
> return 0;
>
> - switch (dsi->vc[channel].source) {
> + switch (dsi->vc[vc].source) {
> case DSI_VC_SOURCE_VP:
> - return dsi_sync_vc_vp(dsi, channel);
> + return dsi_sync_vc_vp(dsi, vc);
> case DSI_VC_SOURCE_L4:
> - return dsi_sync_vc_l4(dsi, channel);
> + return dsi_sync_vc_l4(dsi, vc);
> default:
> BUG();
> return -EINVAL;
> }
> }
>
> -static int dsi_vc_enable(struct dsi_data *dsi, int channel, bool enable)
> +static int dsi_vc_enable(struct dsi_data *dsi, int vc, bool enable)
> {
> - DSSDBG("dsi_vc_enable channel %d, enable %d\n",
> - channel, enable);
> + DSSDBG("dsi_vc_enable vc %d, enable %d\n",
> + vc, enable);
>
> enable = enable ? 1 : 0;
>
> - REG_FLD_MOD(dsi, DSI_VC_CTRL(channel), enable, 0, 0);
> + REG_FLD_MOD(dsi, DSI_VC_CTRL(vc), enable, 0, 0);
>
> - if (!wait_for_bit_change(dsi, DSI_VC_CTRL(channel), 0, enable)) {
> + if (!wait_for_bit_change(dsi, DSI_VC_CTRL(vc), 0, enable)) {
> DSSERR("Failed to set dsi_vc_enable to %d\n", enable);
> return -EIO;
> }
> @@ -2370,17 +2370,17 @@ static int dsi_vc_enable(struct dsi_data *dsi, int
> channel, bool enable)
> return 0;
> }
>
> -static void dsi_vc_initial_config(struct dsi_data *dsi, int channel)
> +static void dsi_vc_initial_config(struct dsi_data *dsi, int vc)
> {
> u32 r;
>
> - DSSDBG("Initial config of virtual channel %d", channel);
> + DSSDBG("Initial config of VC %d", vc);
>
> - r = dsi_read_reg(dsi, DSI_VC_CTRL(channel));
> + r = dsi_read_reg(dsi, DSI_VC_CTRL(vc));
>
> if (FLD_GET(r, 15, 15)) /* VC_BUSY */
> DSSERR("VC(%d) busy when trying to configure it!\n",
> - channel);
> + vc);
>
> r = FLD_MOD(r, 0, 1, 1); /* SOURCE, 0 = L4 */
> r = FLD_MOD(r, 0, 2, 2); /* BTA_SHORT_EN */
> @@ -2395,76 +2395,76 @@ static void dsi_vc_initial_config(struct dsi_data
> *dsi, int channel)
> r = FLD_MOD(r, 4, 29, 27); /* DMA_RX_REQ_NB = no dma */
> r = FLD_MOD(r, 4, 23, 21); /* DMA_TX_REQ_NB = no dma */
>
> - dsi_write_reg(dsi, DSI_VC_CTRL(channel), r);
> + dsi_write_reg(dsi, DSI_VC_CTRL(vc), r);
>
> - dsi->vc[channel].source = DSI_VC_SOURCE_L4;
> + dsi->vc[vc].source = DSI_VC_SOURCE_L4;
> }
>
> -static int dsi_vc_config_source(struct dsi_data *dsi, int channel,
> +static int dsi_vc_config_source(struct dsi_data *dsi, int vc,
> enum dsi_vc_source source)
> {
> - if (dsi->vc[channel].source == source)
> + if (dsi->vc[vc].source == source)
> return 0;
>
> - DSSDBG("Source config of virtual channel %d", channel);
> + DSSDBG("Source config of VC %d", vc);
>
> - dsi_sync_vc(dsi, channel);
> + dsi_sync_vc(dsi, vc);
>
> - dsi_vc_enable(dsi, channel, 0);
> + dsi_vc_enable(dsi, vc, 0);
>
> /* VC_BUSY */
> - if (!wait_for_bit_change(dsi, DSI_VC_CTRL(channel), 15, 0)) {
> - DSSERR("vc(%d) busy when trying to config for VP\n", channel);
> + if (!wait_for_bit_change(dsi, DSI_VC_CTRL(vc), 15, 0)) {
> + DSSERR("vc(%d) busy when trying to config for VP\n", vc);
> return -EIO;
> }
>
> /* SOURCE, 0 = L4, 1 = video port */
> - REG_FLD_MOD(dsi, DSI_VC_CTRL(channel), source, 1, 1);
> + REG_FLD_MOD(dsi, DSI_VC_CTRL(vc), source, 1, 1);
>
> /* DCS_CMD_ENABLE */
> if (dsi->data->quirks & DSI_QUIRK_DCS_CMD_CONFIG_VC) {
> bool enable = source == DSI_VC_SOURCE_VP;
> - REG_FLD_MOD(dsi, DSI_VC_CTRL(channel), enable, 30, 30);
> + REG_FLD_MOD(dsi, DSI_VC_CTRL(vc), enable, 30, 30);
> }
>
> - dsi_vc_enable(dsi, channel, 1);
> + dsi_vc_enable(dsi, vc, 1);
>
> - dsi->vc[channel].source = source;
> + dsi->vc[vc].source = source;
>
> return 0;
> }
>
> -static void dsi_vc_enable_hs(struct omap_dss_device *dssdev, int channel,
> +static void dsi_vc_enable_hs(struct omap_dss_device *dssdev, int vc,
> bool enable)
> {
> struct dsi_data *dsi = to_dsi_data(dssdev);
>
> - DSSDBG("dsi_vc_enable_hs(%d, %d)\n", channel, enable);
> + DSSDBG("dsi_vc_enable_hs(%d, %d)\n", vc, enable);
>
> WARN_ON(!dsi_bus_is_locked(dsi));
>
> - dsi_vc_enable(dsi, channel, 0);
> + dsi_vc_enable(dsi, vc, 0);
> dsi_if_enable(dsi, 0);
>
> - REG_FLD_MOD(dsi, DSI_VC_CTRL(channel), enable, 9, 9);
> + REG_FLD_MOD(dsi, DSI_VC_CTRL(vc), enable, 9, 9);
>
> - dsi_vc_enable(dsi, channel, 1);
> + dsi_vc_enable(dsi, vc, 1);
> dsi_if_enable(dsi, 1);
>
> dsi_force_tx_stop_mode_io(dsi);
>
> /* start the DDR clock by sending a NULL packet */
> if (dsi->vm_timings.ddr_clk_always_on && enable)
> - dsi_vc_send_null(dsi, channel);
> + dsi_vc_send_null(dsi, vc);
>
> dsi->in_lp_mode = !enable;
> }
>
> -static void dsi_vc_flush_long_data(struct dsi_data *dsi, int channel)
> +static void dsi_vc_flush_long_data(struct dsi_data *dsi, int vc)
> {
> - while (REG_GET(dsi, DSI_VC_CTRL(channel), 20, 20)) {
> + while (REG_GET(dsi, DSI_VC_CTRL(vc), 20, 20)) {
> u32 val;
> - val = dsi_read_reg(dsi, DSI_VC_SHORT_PACKET_HEADER(channel));
> + val = dsi_read_reg(dsi, DSI_VC_SHORT_PACKET_HEADER(vc));
> DSSDBG("\t\tb1 %#02x b2 %#02x b3 %#02x b4 %#02x\n",
> (val >> 0) & 0xff,
> (val >> 8) & 0xff,
> @@ -2510,13 +2510,13 @@ static void dsi_show_rx_ack_with_err(u16 err)
> DSSERR("\t\tDSI Protocol Violation\n");
> }
>
> -static u16 dsi_vc_flush_receive_data(struct dsi_data *dsi, int channel)
> +static u16 dsi_vc_flush_receive_data(struct dsi_data *dsi, int vc)
> {
> /* RX_FIFO_NOT_EMPTY */
> - while (REG_GET(dsi, DSI_VC_CTRL(channel), 20, 20)) {
> + while (REG_GET(dsi, DSI_VC_CTRL(vc), 20, 20)) {
> u32 val;
> u8 dt;
> - val = dsi_read_reg(dsi, DSI_VC_SHORT_PACKET_HEADER(channel));
> + val = dsi_read_reg(dsi, DSI_VC_SHORT_PACKET_HEADER(vc));
> DSSERR("\trawval %#08x\n", val);
> dt = FLD_GET(val, 5, 0);
> if (dt == MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT) {
> @@ -2531,7 +2531,7 @@ static u16 dsi_vc_flush_receive_data(struct dsi_data
> *dsi, int channel)
> } else if (dt == MIPI_DSI_RX_DCS_LONG_READ_RESPONSE) {
> DSSERR("\tDCS long response, len %d\n",
> FLD_GET(val, 23, 8));
> - dsi_vc_flush_long_data(dsi, channel);
> + dsi_vc_flush_long_data(dsi, vc);
> } else {
> DSSERR("\tunknown datatype 0x%02x\n", dt);
> }
> @@ -2539,35 +2539,35 @@ static u16 dsi_vc_flush_receive_data(struct dsi_data
> *dsi, int channel)
> return 0;
> }
>
> -static int dsi_vc_send_bta(struct dsi_data *dsi, int channel)
> +static int dsi_vc_send_bta(struct dsi_data *dsi, int vc)
> {
> if (dsi->debug_write || dsi->debug_read)
> - DSSDBG("dsi_vc_send_bta %d\n", channel);
> + DSSDBG("dsi_vc_send_bta %d\n", vc);
>
> WARN_ON(!dsi_bus_is_locked(dsi));
>
> /* RX_FIFO_NOT_EMPTY */
> - if (REG_GET(dsi, DSI_VC_CTRL(channel), 20, 20)) {
> + if (REG_GET(dsi, DSI_VC_CTRL(vc), 20, 20)) {
> DSSERR("rx fifo not empty when sending BTA, dumping data:\n");
> - dsi_vc_flush_receive_data(dsi, channel);
> + dsi_vc_flush_receive_data(dsi, vc);
> }
>
> - REG_FLD_MOD(dsi, DSI_VC_CTRL(channel), 1, 6, 6); /* BTA_EN */
> + REG_FLD_MOD(dsi, DSI_VC_CTRL(vc), 1, 6, 6); /* BTA_EN */
>
> /* flush posted write */
> - dsi_read_reg(dsi, DSI_VC_CTRL(channel));
> + dsi_read_reg(dsi, DSI_VC_CTRL(vc));
>
> return 0;
> }
>
> -static int dsi_vc_send_bta_sync(struct omap_dss_device *dssdev, int channel)
> +static int dsi_vc_send_bta_sync(struct omap_dss_device *dssdev, int vc)
> {
> struct dsi_data *dsi = to_dsi_data(dssdev);
> DECLARE_COMPLETION_ONSTACK(completion);
> int r = 0;
> u32 err;
>
> - r = dsi_register_isr_vc(dsi, channel, dsi_completion_handler,
> + r = dsi_register_isr_vc(dsi, vc, dsi_completion_handler,
> &completion, DSI_VC_IRQ_BTA);
> if (r)
> goto err0;
> @@ -2577,7 +2577,7 @@ static int dsi_vc_send_bta_sync(struct omap_dss_device
> *dssdev, int channel)
> if (r)
> goto err1;
>
> - r = dsi_vc_send_bta(dsi, channel);
> + r = dsi_vc_send_bta(dsi, vc);
> if (r)
> goto err2;
>
> @@ -2598,13 +2598,13 @@ static int dsi_vc_send_bta_sync(struct
> omap_dss_device *dssdev, int channel)
> dsi_unregister_isr(dsi, dsi_completion_handler, &completion,
> DSI_IRQ_ERROR_MASK);
> err1:
> - dsi_unregister_isr_vc(dsi, channel, dsi_completion_handler,
> + dsi_unregister_isr_vc(dsi, vc, dsi_completion_handler,
> &completion, DSI_VC_IRQ_BTA);
> err0:
> return r;
> }
>
> -static inline void dsi_vc_write_long_header(struct dsi_data *dsi, int
> channel,
> +static inline void dsi_vc_write_long_header(struct dsi_data *dsi, int vc,
> u8 data_type, u16 len, u8 ecc)
> {
> u32 val;
> @@ -2612,15 +2612,15 @@ static inline void dsi_vc_write_long_header(struct
> dsi_data *dsi, int channel,
>
> WARN_ON(!dsi_bus_is_locked(dsi));
>
> - data_id = data_type | channel << 6;
> + data_id = data_type | vc << 6;
>
> val = FLD_VAL(data_id, 7, 0) | FLD_VAL(len, 23, 8) |
> FLD_VAL(ecc, 31, 24);
>
> - dsi_write_reg(dsi, DSI_VC_LONG_PACKET_HEADER(channel), val);
> + dsi_write_reg(dsi, DSI_VC_LONG_PACKET_HEADER(vc), val);
> }
>
> -static inline void dsi_vc_write_long_payload(struct dsi_data *dsi, int
> channel,
> +static inline void dsi_vc_write_long_payload(struct dsi_data *dsi, int vc,
> u8 b1, u8 b2, u8 b3, u8 b4)
> {
> u32 val;
> @@ -2630,7 +2630,7 @@ static inline void dsi_vc_write_long_payload(struct
> dsi_data *dsi, int channel,
> /* DSSDBG("\twriting %02x, %02x, %02x, %02x (%#010x)\n",
> b1, b2, b3, b4, val); */
>
> - dsi_write_reg(dsi, DSI_VC_LONG_PACKET_PAYLOAD(channel), val);
> + dsi_write_reg(dsi, DSI_VC_LONG_PACKET_PAYLOAD(vc), val);
> }
>
> static int dsi_vc_send_long(struct dsi_data *dsi,
> @@ -2727,10 +2727,10 @@ static int dsi_vc_send_short(struct dsi_data *dsi,
> return 0;
> }
>
> -static int dsi_vc_send_null(struct dsi_data *dsi, int channel)
> +static int dsi_vc_send_null(struct dsi_data *dsi, int vc)
> {
> const struct mipi_dsi_msg msg = {
> - .channel = channel,
> + .channel = vc,
> .type = MIPI_DSI_NULL_PACKET,
> };
>
> @@ -2774,7 +2774,7 @@ static int dsi_vc_write_common(struct omap_dss_device
> *dssdev,
> return 0;
> }
>
> -static int dsi_vc_read_rx_fifo(struct dsi_data *dsi, int channel, u8 *buf,
> +static int dsi_vc_read_rx_fifo(struct dsi_data *dsi, int vc, u8 *buf,
> int buflen, enum dss_dsi_content_type type)
> {
> u32 val;
> @@ -2782,13 +2782,13 @@ static int dsi_vc_read_rx_fifo(struct dsi_data *dsi,
> int channel, u8 *buf,
> int r;
>
> /* RX_FIFO_NOT_EMPTY */
> - if (REG_GET(dsi, DSI_VC_CTRL(channel), 20, 20) == 0) {
> + if (REG_GET(dsi, DSI_VC_CTRL(vc), 20, 20) == 0) {
> DSSERR("RX fifo empty when trying to read.\n");
> r = -EIO;
> goto err;
> }
>
> - val = dsi_read_reg(dsi, DSI_VC_SHORT_PACKET_HEADER(channel));
> + val = dsi_read_reg(dsi, DSI_VC_SHORT_PACKET_HEADER(vc));
> if (dsi->debug_read)
> DSSDBG("\theader: %08x\n", val);
> dt = FLD_GET(val, 5, 0);
> @@ -2852,7 +2852,7 @@ static int dsi_vc_read_rx_fifo(struct dsi_data *dsi,
> int channel, u8 *buf,
> for (w = 0; w < len + 2;) {
> int b;
> val = dsi_read_reg(dsi,
> - DSI_VC_SHORT_PACKET_HEADER(channel));
> + DSI_VC_SHORT_PACKET_HEADER(vc));
> if (dsi->debug_read)
> DSSDBG("\t\t%02x %02x %02x %02x\n",
> (val >> 0) & 0xff,
> @@ -2876,7 +2876,7 @@ static int dsi_vc_read_rx_fifo(struct dsi_data *dsi,
> int channel, u8 *buf,
> }
>
> err:
> - DSSERR("dsi_vc_read_rx_fifo(ch %d type %s) failed\n", channel,
> + DSSERR("dsi_vc_read_rx_fifo(vc %d type %s) failed\n", vc,
> type == DSS_DSI_CONTENT_GENERIC ? "GENERIC" : "DCS");
>
> return r;
> @@ -3631,7 +3631,7 @@ static int dsi_configure_pins(struct dsi_data *dsi,
> return 0;
> }
>
> -static void dsi_enable_video_output(struct omap_dss_device *dssdev, int
> channel)
> +static void dsi_enable_video_output(struct omap_dss_device *dssdev, int vc)
> {
> struct dsi_data *dsi = to_dsi_data(dssdev);
> int bpp = mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt);
> @@ -3665,17 +3665,17 @@ static void dsi_enable_video_output(struct
> omap_dss_device *dssdev, int channel)
> }
>
> dsi_if_enable(dsi, false);
> - dsi_vc_enable(dsi, channel, false);
> + dsi_vc_enable(dsi, vc, false);
>
> /* MODE, 1 = video mode */
> - REG_FLD_MOD(dsi, DSI_VC_CTRL(channel), 1, 4, 4);
> + REG_FLD_MOD(dsi, DSI_VC_CTRL(vc), 1, 4, 4);
>
> word_count = DIV_ROUND_UP(dsi->vm.hactive * bpp, 8);
>
> - dsi_vc_write_long_header(dsi, channel, data_type,
> + dsi_vc_write_long_header(dsi, vc, data_type,
> word_count, 0);
>
> - dsi_vc_enable(dsi, channel, true);
> + dsi_vc_enable(dsi, vc, true);
> dsi_if_enable(dsi, true);
> }
>
> @@ -3688,7 +3688,7 @@ static void dsi_enable_video_output(struct
> omap_dss_device *dssdev, int channel)
> err_mgr_enable:
> if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
> dsi_if_enable(dsi, false);
> - dsi_vc_enable(dsi, channel, false);
> + dsi_vc_enable(dsi, vc, false);
> }
> err_pix_fmt:
> dsi_display_uninit_dispc(dsi);
> @@ -3696,18 +3696,18 @@ static void dsi_enable_video_output(struct
> omap_dss_device *dssdev, int channel)
> return;
> }
>
> -static void dsi_disable_video_output(struct omap_dss_device *dssdev, int
> channel)
> +static void dsi_disable_video_output(struct omap_dss_device *dssdev, int vc)
> {
> struct dsi_data *dsi = to_dsi_data(dssdev);
>
> if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
> dsi_if_enable(dsi, false);
> - dsi_vc_enable(dsi, channel, false);
> + dsi_vc_enable(dsi, vc, false);
>
> /* MODE, 0 = command mode */
> - REG_FLD_MOD(dsi, DSI_VC_CTRL(channel), 0, 4, 4);
> + REG_FLD_MOD(dsi, DSI_VC_CTRL(vc), 0, 4, 4);
>
> - dsi_vc_enable(dsi, channel, true);
> + dsi_vc_enable(dsi, vc, true);
> dsi_if_enable(dsi, true);
> }
>
> @@ -3740,14 +3740,14 @@ static void dsi_update_screen_dispc(struct dsi_data
> *dsi)
> unsigned int packet_len;
> u32 l;
> int r;
> - const unsigned channel = dsi->update_channel;
> + const unsigned vc = dsi->update_vc;
> const unsigned int line_buf_size = dsi->line_buffer_size;
> u16 w = dsi->vm.hactive;
> u16 h = dsi->vm.vactive;
>
> DSSDBG("dsi_update_screen_dispc(%dx%d)\n", w, h);
>
> - dsi_vc_config_source(dsi, channel, DSI_VC_SOURCE_VP);
> + dsi_vc_config_source(dsi, vc, DSI_VC_SOURCE_VP);
>
> bytespp = mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt) / 8;
> bytespl = w * bytespp;
> @@ -3768,16 +3768,16 @@ static void dsi_update_screen_dispc(struct dsi_data
> *dsi)
> total_len += (bytespf % packet_payload) + 1;
>
> l = FLD_VAL(total_len, 23, 0); /* TE_SIZE */
> - dsi_write_reg(dsi, DSI_VC_TE(channel), l);
> + dsi_write_reg(dsi, DSI_VC_TE(vc), l);
>
> - dsi_vc_write_long_header(dsi, channel, MIPI_DSI_DCS_LONG_WRITE,
> + dsi_vc_write_long_header(dsi, vc, MIPI_DSI_DCS_LONG_WRITE,
> packet_len, 0);
>
> if (dsi->te_enabled)
> l = FLD_MOD(l, 1, 30, 30); /* TE_EN */
> else
> l = FLD_MOD(l, 1, 31, 31); /* TE_START */
> - dsi_write_reg(dsi, DSI_VC_TE(channel), l);
> + dsi_write_reg(dsi, DSI_VC_TE(vc), l);
>
> /* We put SIDLEMODE to no-idle for the duration of the transfer,
> * because DSS interrupts are not capable of waking up the CPU and the
> @@ -3800,7 +3800,7 @@ static void dsi_update_screen_dispc(struct dsi_data
> *dsi)
> * for TE is longer than the timer allows */
> REG_FLD_MOD(dsi, DSI_TIMING2, 0, 15, 15); /* LP_RX_TO */
>
> - dsi_vc_send_bta(dsi, channel);
> + dsi_vc_send_bta(dsi, vc);
>
> #ifdef DSI_CATCH_MISSING_TE
> mod_timer(&dsi->te_timer, jiffies + msecs_to_jiffies(250));
> @@ -3897,7 +3897,7 @@ static int _dsi_send_nop(struct dsi_data *dsi, int
> channel)
> return _omap_dsi_host_transfer(dsi, &msg);
> }
>
> -static int dsi_update_channel(struct omap_dss_device *dssdev, int channel)
> +static int dsi_update_channel(struct omap_dss_device *dssdev, int vc)
> {
> struct dsi_data *dsi = to_dsi_data(dssdev);
> int r;
> @@ -3914,7 +3914,7 @@ static int dsi_update_channel(struct omap_dss_device
> *dssdev, int channel)
> goto err;
> }
>
> - DSSDBG("dsi_update_channel: %d", channel);
> + DSSDBG("dsi_update_channel: %d", vc);
>
> dsi_set_ulps_auto(dsi, false);
>
> @@ -3923,13 +3923,13 @@ static int dsi_update_channel(struct omap_dss_device
> *dssdev, int channel)
> * updates stop working. This is probably related to DSI spec stating
> * that the DSI host should transition to LP at least once per frame.
> */
> - r = _dsi_send_nop(dsi, channel);
> + r = _dsi_send_nop(dsi, vc);
> if (r < 0) {
> DSSWARN("failed to send nop between frames: %d\n", r);
> goto err;
> }
>
> - dsi->update_channel = channel;
> + dsi->update_vc = vc;
>
> if (dsi->te_enabled && dsi->te_gpio) {
> schedule_delayed_work(&dsi->te_timeout_work,
--
Regards,
Laurent Pinchart
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