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Date:   Fri, 6 Nov 2020 06:56:17 +0200
From:   Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To:     Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc:     Sebastian Reichel <sre@kernel.org>,
        Nikhil Devshatwar <nikhil.nd@ti.com>,
        linux-omap@vger.kernel.org, dri-devel@lists.freedesktop.org,
        Sekhar Nori <nsekhar@ti.com>, Tony Lindgren <tony@atomide.com>,
        "H . Nikolaus Schaller" <hns@goldelico.com>,
        Sebastian Reichel <sebastian.reichel@collabora.com>
Subject: Re: [PATCH v3 04/56] drm/omap: dsi: use MIPI_DSI_FMT_* instead of
 OMAP_DSS_DSI_FMT_*
Message-ID: <20201106045617.GE16469@pendragon.ideasonboard.com>
References: <20201105120333.947408-1-tomi.valkeinen@ti.com>
 <20201105120333.947408-5-tomi.valkeinen@ti.com>
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Hi Tomi and Sebastian,

Thank you for the patch.

On Thu, Nov 05, 2020 at 02:02:41PM +0200, Tomi Valkeinen wrote:
> From: Sebastian Reichel <sebastian.reichel@collabora.com>
> 
> This replaces OMAP specific enum for pixel format with
> common implementation.
> 
> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
>  .../gpu/drm/omapdrm/displays/panel-dsi-cm.c   |  2 +-
>  drivers/gpu/drm/omapdrm/dss/dsi.c             | 55 ++++++++-----------
>  drivers/gpu/drm/omapdrm/dss/omapdss.h         | 13 ++---
>  3 files changed, 28 insertions(+), 42 deletions(-)
> 
> diff --git a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
> index ff610d2a13fd..b8f3a7aacbf4 100644
> --- a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
> +++ b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
> @@ -595,7 +595,7 @@ static int dsicm_power_on(struct panel_drv_data *ddata)
>  	int r;
>  	struct omap_dss_dsi_config dsi_config = {
>  		.mode = OMAP_DSS_DSI_CMD_MODE,
> -		.pixel_format = OMAP_DSS_DSI_FMT_RGB888,
> +		.pixel_format = MIPI_DSI_FMT_RGB888,
>  		.vm = &ddata->vm,
>  		.hs_clk_min = 150000000,
>  		.hs_clk_max = 300000000,
> diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c
> index 5598fc8f91db..86b9d435fb94 100644
> --- a/drivers/gpu/drm/omapdrm/dss/dsi.c
> +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c
> @@ -33,6 +33,7 @@
>  #include <linux/component.h>
>  #include <linux/sys_soc.h>
>  
> +#include <drm/drm_mipi_dsi.h>
>  #include <video/mipi_display.h>
>  
>  #include "omapdss.h"
> @@ -410,7 +411,7 @@ struct dsi_data {
>  
>  	struct dss_lcd_mgr_config mgr_config;
>  	struct videomode vm;
> -	enum omap_dss_dsi_pixel_format pix_fmt;
> +	enum mipi_dsi_pixel_format pix_fmt;
>  	enum omap_dss_dsi_mode mode;
>  	struct omap_dss_dsi_videomode_timings vm_timings;
>  
> @@ -514,22 +515,6 @@ static inline bool wait_for_bit_change(struct dsi_data *dsi,
>  	return false;
>  }
>  
> -static u8 dsi_get_pixel_size(enum omap_dss_dsi_pixel_format fmt)
> -{
> -	switch (fmt) {
> -	case OMAP_DSS_DSI_FMT_RGB888:
> -	case OMAP_DSS_DSI_FMT_RGB666:
> -		return 24;
> -	case OMAP_DSS_DSI_FMT_RGB666_PACKED:
> -		return 18;
> -	case OMAP_DSS_DSI_FMT_RGB565:
> -		return 16;
> -	default:
> -		BUG();
> -		return 0;
> -	}
> -}
> -
>  #ifdef DSI_PERF_MEASURE
>  static void dsi_perf_mark_setup(struct dsi_data *dsi)
>  {
> @@ -3239,7 +3224,7 @@ static void dsi_config_vp_num_line_buffers(struct dsi_data *dsi)
>  	int num_line_buffers;
>  
>  	if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
> -		int bpp = dsi_get_pixel_size(dsi->pix_fmt);
> +		int bpp = mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt);
>  		const struct videomode *vm = &dsi->vm;
>  		/*
>  		 * Don't use line buffers if width is greater than the video
> @@ -3370,7 +3355,7 @@ static void dsi_config_cmd_mode_interleaving(struct dsi_data *dsi)
>  	int tclk_trail, ths_exit, exiths_clk;
>  	bool ddr_alwon;
>  	const struct videomode *vm = &dsi->vm;
> -	int bpp = dsi_get_pixel_size(dsi->pix_fmt);
> +	int bpp = mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt);
>  	int ndl = dsi->num_lanes_used - 1;
>  	int dsi_fclk_hsdiv = dsi->user_dsi_cinfo.mX[HSDIV_DSI] + 1;
>  	int hsa_interleave_hs = 0, hsa_interleave_lp = 0;
> @@ -3498,7 +3483,7 @@ static int dsi_proto_config(struct dsi_data *dsi)
>  	dsi_set_lp_rx_timeout(dsi, 0x1fff, true, true);
>  	dsi_set_hs_tx_timeout(dsi, 0x1fff, true, true);
>  
> -	switch (dsi_get_pixel_size(dsi->pix_fmt)) {
> +	switch (mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt)) {
>  	case 16:
>  		buswidth = 0;
>  		break;
> @@ -3619,7 +3604,7 @@ static void dsi_proto_timings(struct dsi_data *dsi)
>  		int window_sync = dsi->vm_timings.window_sync;
>  		bool hsync_end;
>  		const struct videomode *vm = &dsi->vm;
> -		int bpp = dsi_get_pixel_size(dsi->pix_fmt);
> +		int bpp = mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt);
>  		int tl, t_he, width_bytes;
>  
>  		hsync_end = dsi->vm_timings.trans_mode == OMAP_DSS_DSI_PULSE_MODE;
> @@ -3726,7 +3711,7 @@ static int dsi_configure_pins(struct omap_dss_device *dssdev,
>  static int dsi_enable_video_output(struct omap_dss_device *dssdev, int channel)
>  {
>  	struct dsi_data *dsi = to_dsi_data(dssdev);
> -	int bpp = dsi_get_pixel_size(dsi->pix_fmt);
> +	int bpp = mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt);
>  	u8 data_type;
>  	u16 word_count;
>  	int r;
> @@ -3737,16 +3722,16 @@ static int dsi_enable_video_output(struct omap_dss_device *dssdev, int channel)
>  
>  	if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) {
>  		switch (dsi->pix_fmt) {
> -		case OMAP_DSS_DSI_FMT_RGB888:
> +		case MIPI_DSI_FMT_RGB888:
>  			data_type = MIPI_DSI_PACKED_PIXEL_STREAM_24;
>  			break;
> -		case OMAP_DSS_DSI_FMT_RGB666:
> +		case MIPI_DSI_FMT_RGB666:
>  			data_type = MIPI_DSI_PIXEL_STREAM_3BYTE_18;
>  			break;
> -		case OMAP_DSS_DSI_FMT_RGB666_PACKED:
> +		case MIPI_DSI_FMT_RGB666_PACKED:
>  			data_type = MIPI_DSI_PACKED_PIXEL_STREAM_18;
>  			break;
> -		case OMAP_DSS_DSI_FMT_RGB565:
> +		case MIPI_DSI_FMT_RGB565:
>  			data_type = MIPI_DSI_PACKED_PIXEL_STREAM_16;
>  			break;
>  		default:
> @@ -3824,7 +3809,7 @@ static void dsi_update_screen_dispc(struct dsi_data *dsi)
>  
>  	dsi_vc_config_source(dsi, channel, DSI_VC_SOURCE_VP);
>  
> -	bytespp	= dsi_get_pixel_size(dsi->pix_fmt) / 8;
> +	bytespp	= mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt) / 8;
>  	bytespl = w * bytespp;
>  	bytespf = bytespl * h;
>  
> @@ -3954,7 +3939,7 @@ static int dsi_update(struct omap_dss_device *dssdev, int channel,
>  
>  #ifdef DSI_PERF_MEASURE
>  	dsi->update_bytes = dw * dh *
> -		dsi_get_pixel_size(dsi->pix_fmt) / 8;
> +		mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt) / 8;
>  #endif
>  	dsi_update_screen_dispc(dsi);
>  
> @@ -4015,7 +4000,7 @@ static int dsi_display_init_dispc(struct dsi_data *dsi)
>  
>  	dsi->mgr_config.io_pad_mode = DSS_IO_PAD_MODE_BYPASS;
>  	dsi->mgr_config.video_port_width =
> -			dsi_get_pixel_size(dsi->pix_fmt);
> +			mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt);
>  	dsi->mgr_config.lcden_sig_polarity = 0;
>  
>  	dss_mgr_set_lcd_config(&dsi->output, &dsi->mgr_config);
> @@ -4353,7 +4338,7 @@ static bool dsi_cm_calc(struct dsi_data *dsi,
>  	unsigned long pck, txbyteclk;
>  
>  	clkin = clk_get_rate(dsi->pll.clkin);
> -	bitspp = dsi_get_pixel_size(cfg->pixel_format);
> +	bitspp = mipi_dsi_pixel_format_to_bpp(cfg->pixel_format);
>  	ndl = dsi->num_lanes_used - 1;
>  
>  	/*
> @@ -4386,7 +4371,7 @@ static bool dsi_vm_calc_blanking(struct dsi_clk_calc_ctx *ctx)
>  {
>  	struct dsi_data *dsi = ctx->dsi;
>  	const struct omap_dss_dsi_config *cfg = ctx->config;
> -	int bitspp = dsi_get_pixel_size(cfg->pixel_format);
> +	int bitspp = mipi_dsi_pixel_format_to_bpp(cfg->pixel_format);
>  	int ndl = dsi->num_lanes_used - 1;
>  	unsigned long hsclk = ctx->dsi_cinfo.clkdco / 4;
>  	unsigned long byteclk = hsclk / 4;
> @@ -4653,7 +4638,7 @@ static bool dsi_vm_calc(struct dsi_data *dsi,
>  	unsigned long pll_min;
>  	unsigned long pll_max;
>  	int ndl = dsi->num_lanes_used - 1;
> -	int bitspp = dsi_get_pixel_size(cfg->pixel_format);
> +	int bitspp = mipi_dsi_pixel_format_to_bpp(cfg->pixel_format);
>  	unsigned long byteclk_min;
>  
>  	clkin = clk_get_rate(dsi->pll.clkin);
> @@ -4699,6 +4684,12 @@ static int dsi_set_config(struct omap_dss_device *dssdev,
>  	dsi->pix_fmt = config->pixel_format;
>  	dsi->mode = config->mode;
>  
> +	if (mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt) < 0) {
> +		DSSERR("invalid pixel format\n");
> +		r = -EINVAL;
> +		goto err;
> +	}
> +
>  	if (config->mode == OMAP_DSS_DSI_VIDEO_MODE)
>  		ok = dsi_vm_calc(dsi, config, &ctx);
>  	else
> diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss.h b/drivers/gpu/drm/omapdrm/dss/omapdss.h
> index b0424daaceed..c4bc1f919ab4 100644
> --- a/drivers/gpu/drm/omapdrm/dss/omapdss.h
> +++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h
> @@ -12,8 +12,10 @@
>  #include <linux/interrupt.h>
>  #include <video/videomode.h>
>  #include <linux/platform_data/omapdss.h>
> -#include <uapi/drm/drm_mode.h>
> +
>  #include <drm/drm_crtc.h>
> +#include <drm/drm_mipi_dsi.h>
> +#include <drm/drm_mode.h>
>  
>  #define DISPC_IRQ_FRAMEDONE		(1 << 0)
>  #define DISPC_IRQ_VSYNC			(1 << 1)
> @@ -116,13 +118,6 @@ enum omap_dss_venc_type {
>  	OMAP_DSS_VENC_TYPE_SVIDEO,
>  };
>  
> -enum omap_dss_dsi_pixel_format {
> -	OMAP_DSS_DSI_FMT_RGB888,
> -	OMAP_DSS_DSI_FMT_RGB666,
> -	OMAP_DSS_DSI_FMT_RGB666_PACKED,
> -	OMAP_DSS_DSI_FMT_RGB565,
> -};
> -
>  enum omap_dss_dsi_mode {
>  	OMAP_DSS_DSI_CMD_MODE = 0,
>  	OMAP_DSS_DSI_VIDEO_MODE,
> @@ -210,7 +205,7 @@ struct omap_dss_dsi_videomode_timings {
>  
>  struct omap_dss_dsi_config {
>  	enum omap_dss_dsi_mode mode;
> -	enum omap_dss_dsi_pixel_format pixel_format;
> +	enum mipi_dsi_pixel_format pixel_format;
>  	const struct videomode *vm;
>  
>  	unsigned long hs_clk_min, hs_clk_max;

-- 
Regards,

Laurent Pinchart