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Message-ID: <0a2e38497feb4b6904f5e5bc3ed43c62@codeaurora.org>
Date: Fri, 28 May 2021 16:14:59 -0700
From: abhinavk@...eaurora.org
To: Bjorn Andersson <bjorn.andersson@...aro.org>
Cc: Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Stephen Boyd <swboyd@...omium.org>, sbillaka@...eaurora.org,
Tanmay Shah <tanmay@...eaurora.org>,
linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
dri-devel@...ts.freedesktop.org,
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
freedreno@...ts.freedesktop.org,
Chandan Uddaraju <chandanu@...eaurora.org>
Subject: Re: [Freedreno] [PATCH 2/4] drm/msm/dp: Store each subblock in the io
region
On 2021-05-10 21:20, Bjorn Andersson wrote:
> Not all platforms has DP_P0 at offset 0x1000 from the beginning of the
> DP block. So move the offsets into dss_io_data, to make it possible in
> the next patch to specify alternative offsets and sizes of these
> segments.
>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
Reviewed-by: Abhinav Kumar <abhinavk@...eaurora.org>
> ---
> drivers/gpu/drm/msm/dp/dp_catalog.c | 57 ++++++++---------------------
> drivers/gpu/drm/msm/dp/dp_parser.c | 10 +++++
> drivers/gpu/drm/msm/dp/dp_parser.h | 8 ++++
> 3 files changed, 33 insertions(+), 42 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c
> b/drivers/gpu/drm/msm/dp/dp_catalog.c
> index 2eb37ee48e42..a0449a2867e4 100644
> --- a/drivers/gpu/drm/msm/dp/dp_catalog.c
> +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c
> @@ -24,15 +24,6 @@
> #define DP_INTERRUPT_STATUS_ACK_SHIFT 1
> #define DP_INTERRUPT_STATUS_MASK_SHIFT 2
>
> -#define MSM_DP_CONTROLLER_AHB_OFFSET 0x0000
> -#define MSM_DP_CONTROLLER_AHB_SIZE 0x0200
> -#define MSM_DP_CONTROLLER_AUX_OFFSET 0x0200
> -#define MSM_DP_CONTROLLER_AUX_SIZE 0x0200
> -#define MSM_DP_CONTROLLER_LINK_OFFSET 0x0400
> -#define MSM_DP_CONTROLLER_LINK_SIZE 0x0C00
> -#define MSM_DP_CONTROLLER_P0_OFFSET 0x1000
> -#define MSM_DP_CONTROLLER_P0_SIZE 0x0400
> -
> #define DP_INTERRUPT_STATUS1 \
> (DP_INTR_AUX_I2C_DONE| \
> DP_INTR_WRONG_ADDR | DP_INTR_TIMEOUT | \
> @@ -64,75 +55,67 @@ struct dp_catalog_private {
>
> static inline u32 dp_read_aux(struct dp_catalog_private *catalog, u32
> offset)
> {
> - offset += MSM_DP_CONTROLLER_AUX_OFFSET;
> - return readl_relaxed(catalog->io->dp_controller.base + offset);
> + return readl_relaxed(catalog->io->dp_controller.aux + offset);
> }
>
> static inline void dp_write_aux(struct dp_catalog_private *catalog,
> u32 offset, u32 data)
> {
> - offset += MSM_DP_CONTROLLER_AUX_OFFSET;
> /*
> * To make sure aux reg writes happens before any other operation,
> * this function uses writel() instread of writel_relaxed()
> */
> - writel(data, catalog->io->dp_controller.base + offset);
> + writel(data, catalog->io->dp_controller.aux + offset);
> }
>
> static inline u32 dp_read_ahb(struct dp_catalog_private *catalog, u32
> offset)
> {
> - offset += MSM_DP_CONTROLLER_AHB_OFFSET;
> - return readl_relaxed(catalog->io->dp_controller.base + offset);
> + return readl_relaxed(catalog->io->dp_controller.ahb + offset);
> }
>
> static inline void dp_write_ahb(struct dp_catalog_private *catalog,
> u32 offset, u32 data)
> {
> - offset += MSM_DP_CONTROLLER_AHB_OFFSET;
> /*
> * To make sure phy reg writes happens before any other operation,
> * this function uses writel() instread of writel_relaxed()
> */
> - writel(data, catalog->io->dp_controller.base + offset);
> + writel(data, catalog->io->dp_controller.ahb + offset);
> }
>
> static inline void dp_write_p0(struct dp_catalog_private *catalog,
> u32 offset, u32 data)
> {
> - offset += MSM_DP_CONTROLLER_P0_OFFSET;
> /*
> * To make sure interface reg writes happens before any other
> operation,
> * this function uses writel() instread of writel_relaxed()
> */
> - writel(data, catalog->io->dp_controller.base + offset);
> + writel(data, catalog->io->dp_controller.p0 + offset);
> }
>
> static inline u32 dp_read_p0(struct dp_catalog_private *catalog,
> u32 offset)
> {
> - offset += MSM_DP_CONTROLLER_P0_OFFSET;
> /*
> * To make sure interface reg writes happens before any other
> operation,
> * this function uses writel() instread of writel_relaxed()
> */
> - return readl_relaxed(catalog->io->dp_controller.base + offset);
> + return readl_relaxed(catalog->io->dp_controller.p0 + offset);
> }
>
> static inline u32 dp_read_link(struct dp_catalog_private *catalog, u32
> offset)
> {
> - offset += MSM_DP_CONTROLLER_LINK_OFFSET;
> - return readl_relaxed(catalog->io->dp_controller.base + offset);
> + return readl_relaxed(catalog->io->dp_controller.link + offset);
> }
>
> static inline void dp_write_link(struct dp_catalog_private *catalog,
> u32 offset, u32 data)
> {
> - offset += MSM_DP_CONTROLLER_LINK_OFFSET;
> /*
> * To make sure link reg writes happens before any other operation,
> * this function uses writel() instread of writel_relaxed()
> */
> - writel(data, catalog->io->dp_controller.base + offset);
> + writel(data, catalog->io->dp_controller.link + offset);
> }
>
> /* aux related catalog functions */
> @@ -267,29 +250,21 @@ static void dump_regs(void __iomem *base, int
> len)
>
> void dp_catalog_dump_regs(struct dp_catalog *dp_catalog)
> {
> - u32 offset, len;
> struct dp_catalog_private *catalog = container_of(dp_catalog,
> struct dp_catalog_private, dp_catalog);
> + struct dss_io_data *io = &catalog->io->dp_controller;
>
> pr_info("AHB regs\n");
> - offset = MSM_DP_CONTROLLER_AHB_OFFSET;
> - len = MSM_DP_CONTROLLER_AHB_SIZE;
> - dump_regs(catalog->io->dp_controller.base + offset, len);
> + dump_regs(io->ahb, io->ahb_len);
>
> pr_info("AUXCLK regs\n");
> - offset = MSM_DP_CONTROLLER_AUX_OFFSET;
> - len = MSM_DP_CONTROLLER_AUX_SIZE;
> - dump_regs(catalog->io->dp_controller.base + offset, len);
> + dump_regs(io->aux, io->aux_len);
>
> pr_info("LCLK regs\n");
> - offset = MSM_DP_CONTROLLER_LINK_OFFSET;
> - len = MSM_DP_CONTROLLER_LINK_SIZE;
> - dump_regs(catalog->io->dp_controller.base + offset, len);
> + dump_regs(io->link, io->link_len);
>
> pr_info("P0CLK regs\n");
> - offset = MSM_DP_CONTROLLER_P0_OFFSET;
> - len = MSM_DP_CONTROLLER_P0_SIZE;
> - dump_regs(catalog->io->dp_controller.base + offset, len);
> + dump_regs(io->p0, io->p0_len);
> }
>
> int dp_catalog_aux_get_irq(struct dp_catalog *dp_catalog)
> @@ -454,8 +429,7 @@ int dp_catalog_ctrl_set_pattern(struct dp_catalog
> *dp_catalog,
> bit = BIT(pattern - 1) << DP_MAINLINK_READY_LINK_TRAINING_SHIFT;
>
> /* Poll for mainlink ready status */
> - ret = readx_poll_timeout(readl, catalog->io->dp_controller.base +
> - MSM_DP_CONTROLLER_LINK_OFFSET +
> + ret = readx_poll_timeout(readl, catalog->io->dp_controller.link +
> REG_DP_MAINLINK_READY,
> data, data & bit,
> POLLING_SLEEP_US, POLLING_TIMEOUT_US);
> @@ -502,8 +476,7 @@ bool dp_catalog_ctrl_mainlink_ready(struct
> dp_catalog *dp_catalog)
> struct dp_catalog_private, dp_catalog);
>
> /* Poll for mainlink ready status */
> - ret = readl_poll_timeout(catalog->io->dp_controller.base +
> - MSM_DP_CONTROLLER_LINK_OFFSET +
> + ret = readl_poll_timeout(catalog->io->dp_controller.link +
> REG_DP_MAINLINK_READY,
> data, data & DP_MAINLINK_READY_FOR_VIDEO,
> POLLING_SLEEP_US, POLLING_TIMEOUT_US);
> diff --git a/drivers/gpu/drm/msm/dp/dp_parser.c
> b/drivers/gpu/drm/msm/dp/dp_parser.c
> index 0519dd3ac3c3..51ec85b4803b 100644
> --- a/drivers/gpu/drm/msm/dp/dp_parser.c
> +++ b/drivers/gpu/drm/msm/dp/dp_parser.c
> @@ -250,6 +250,7 @@ static int dp_parser_clock(struct dp_parser
> *parser)
>
> static int dp_parser_parse(struct dp_parser *parser)
> {
> + struct dss_io_data *io = &parser->io.dp_controller;
> int rc = 0;
>
> if (!parser) {
> @@ -275,6 +276,15 @@ static int dp_parser_parse(struct dp_parser
> *parser)
> */
> parser->regulator_cfg = &sdm845_dp_reg_cfg;
>
> + io->ahb = io->base + 0x0;
> + io->ahb_len = 0x200;
> + io->aux = io->base + 0x200;
> + io->aux_len = 0x200;
> + io->link = io->base + 0x400;
> + io->link_len = 0x600;
> + io->p0 = io->base + 0x1000;
> + io->p0_len = 0x400;
> +
> return 0;
> }
>
> diff --git a/drivers/gpu/drm/msm/dp/dp_parser.h
> b/drivers/gpu/drm/msm/dp/dp_parser.h
> index 34b49628bbaf..ff4774109c63 100644
> --- a/drivers/gpu/drm/msm/dp/dp_parser.h
> +++ b/drivers/gpu/drm/msm/dp/dp_parser.h
> @@ -28,6 +28,14 @@ enum dp_pm_type {
> struct dss_io_data {
> u32 len;
> void __iomem *base;
> + void __iomem *ahb;
> + size_t ahb_len;
> + void __iomem *aux;
> + size_t aux_len;
> + void __iomem *link;
> + size_t link_len;
> + void __iomem *p0;
> + size_t p0_len;
> };
>
> static inline const char *dp_parser_pm_name(enum dp_pm_type module)
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